)
+// %+v equivalent to %+s:%d
+func (f Frame) Format(s fmt.State, verb rune) {
+ switch verb {
+ case 's':
+ switch {
+ case s.Flag('+'):
+ pc := f.pc()
+ fn := runtime.FuncForPC(pc)
+ if fn == nil {
+ io.WriteString(s, "unknown")
+ } else {
+ file, _ := fn.FileLine(pc)
+ fmt.Fprintf(s, "%s\n\t%s", fn.Name(), file)
+ }
+ default:
+ io.WriteString(s, path.Base(f.file()))
+ }
+ case 'd':
+ fmt.Fprintf(s, "%d", f.line())
+ case 'n':
+ name := runtime.FuncForPC(f.pc()).Name()
+ io.WriteString(s, funcname(name))
+ case 'v':
+ f.Format(s, 's')
+ io.WriteString(s, ":")
+ f.Format(s, 'd')
+ }
+}
+
+// StackTrace is stack of Frames from innermost (newest) to outermost (oldest).
+type StackTrace []Frame
+
+// Format formats the stack of Frames according to the fmt.Formatter interface.
+//
+// %s lists source files for each Frame in the stack
+// %v lists the source file and line number for each Frame in the stack
+//
+// Format accepts flags that alter the printing of some verbs, as follows:
+//
+// %+v Prints filename, function, and line number for each Frame in the stack.
+func (st StackTrace) Format(s fmt.State, verb rune) {
+ switch verb {
+ case 'v':
+ switch {
+ case s.Flag('+'):
+ for _, f := range st {
+ fmt.Fprintf(s, "\n%+v", f)
+ }
+ case s.Flag('#'):
+ fmt.Fprintf(s, "%#v", []Frame(st))
+ default:
+ fmt.Fprintf(s, "%v", []Frame(st))
+ }
+ case 's':
+ fmt.Fprintf(s, "%s", []Frame(st))
+ }
+}
+
+// stack represents a stack of program counters.
+type stack []uintptr
+
+func (s *stack) Format(st fmt.State, verb rune) {
+ switch verb {
+ case 'v':
+ switch {
+ case st.Flag('+'):
+ for _, pc := range *s {
+ f := Frame(pc)
+ fmt.Fprintf(st, "\n%+v", f)
+ }
+ }
+ }
+}
+
+func (s *stack) StackTrace() StackTrace {
+ f := make([]Frame, len(*s))
+ for i := 0; i < len(f); i++ {
+ f[i] = Frame((*s)[i])
+ }
+ return f
+}
+
+func callers() *stack {
+ const depth = 32
+ var pcs [depth]uintptr
+ n := runtime.Callers(3, pcs[:])
+ var st stack = pcs[0:n]
+ return &st
+}
+
+// funcname removes the path prefix component of a function's name reported by func.Name().
+func funcname(name string) string {
+ i := strings.LastIndex(name, "/")
+ name = name[i+1:]
+ i = strings.Index(name, ".")
+ return name[i+1:]
+}
diff --git a/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/pmezard/go-difflib/LICENSE b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/pmezard/go-difflib/LICENSE
new file mode 100644
index 00000000..c67dad61
--- /dev/null
+++ b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/pmezard/go-difflib/LICENSE
@@ -0,0 +1,27 @@
+Copyright (c) 2013, Patrick Mezard
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+ Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+ Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+ The names of its contributors may not be used to endorse or promote
+products derived from this software without specific prior written
+permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/pmezard/go-difflib/difflib/difflib.go b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/pmezard/go-difflib/difflib/difflib.go
new file mode 100644
index 00000000..003e99fa
--- /dev/null
+++ b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/pmezard/go-difflib/difflib/difflib.go
@@ -0,0 +1,772 @@
+// Package difflib is a partial port of Python difflib module.
+//
+// It provides tools to compare sequences of strings and generate textual diffs.
+//
+// The following class and functions have been ported:
+//
+// - SequenceMatcher
+//
+// - unified_diff
+//
+// - context_diff
+//
+// Getting unified diffs was the main goal of the port. Keep in mind this code
+// is mostly suitable to output text differences in a human friendly way, there
+// are no guarantees generated diffs are consumable by patch(1).
+package difflib
+
+import (
+ "bufio"
+ "bytes"
+ "fmt"
+ "io"
+ "strings"
+)
+
+func min(a, b int) int {
+ if a < b {
+ return a
+ }
+ return b
+}
+
+func max(a, b int) int {
+ if a > b {
+ return a
+ }
+ return b
+}
+
+func calculateRatio(matches, length int) float64 {
+ if length > 0 {
+ return 2.0 * float64(matches) / float64(length)
+ }
+ return 1.0
+}
+
+type Match struct {
+ A int
+ B int
+ Size int
+}
+
+type OpCode struct {
+ Tag byte
+ I1 int
+ I2 int
+ J1 int
+ J2 int
+}
+
+// SequenceMatcher compares sequence of strings. The basic
+// algorithm predates, and is a little fancier than, an algorithm
+// published in the late 1980's by Ratcliff and Obershelp under the
+// hyperbolic name "gestalt pattern matching". The basic idea is to find
+// the longest contiguous matching subsequence that contains no "junk"
+// elements (R-O doesn't address junk). The same idea is then applied
+// recursively to the pieces of the sequences to the left and to the right
+// of the matching subsequence. This does not yield minimal edit
+// sequences, but does tend to yield matches that "look right" to people.
+//
+// SequenceMatcher tries to compute a "human-friendly diff" between two
+// sequences. Unlike e.g. UNIX(tm) diff, the fundamental notion is the
+// longest *contiguous* & junk-free matching subsequence. That's what
+// catches peoples' eyes. The Windows(tm) windiff has another interesting
+// notion, pairing up elements that appear uniquely in each sequence.
+// That, and the method here, appear to yield more intuitive difference
+// reports than does diff. This method appears to be the least vulnerable
+// to synching up on blocks of "junk lines", though (like blank lines in
+// ordinary text files, or maybe "" lines in HTML files). That may be
+// because this is the only method of the 3 that has a *concept* of
+// "junk" .
+//
+// Timing: Basic R-O is cubic time worst case and quadratic time expected
+// case. SequenceMatcher is quadratic time for the worst case and has
+// expected-case behavior dependent in a complicated way on how many
+// elements the sequences have in common; best case time is linear.
+type SequenceMatcher struct {
+ a []string
+ b []string
+ b2j map[string][]int
+ IsJunk func(string) bool
+ autoJunk bool
+ bJunk map[string]struct{}
+ matchingBlocks []Match
+ fullBCount map[string]int
+ bPopular map[string]struct{}
+ opCodes []OpCode
+}
+
+func NewMatcher(a, b []string) *SequenceMatcher {
+ m := SequenceMatcher{autoJunk: true}
+ m.SetSeqs(a, b)
+ return &m
+}
+
+func NewMatcherWithJunk(a, b []string, autoJunk bool,
+ isJunk func(string) bool) *SequenceMatcher {
+
+ m := SequenceMatcher{IsJunk: isJunk, autoJunk: autoJunk}
+ m.SetSeqs(a, b)
+ return &m
+}
+
+// Set two sequences to be compared.
+func (m *SequenceMatcher) SetSeqs(a, b []string) {
+ m.SetSeq1(a)
+ m.SetSeq2(b)
+}
+
+// Set the first sequence to be compared. The second sequence to be compared is
+// not changed.
+//
+// SequenceMatcher computes and caches detailed information about the second
+// sequence, so if you want to compare one sequence S against many sequences,
+// use .SetSeq2(s) once and call .SetSeq1(x) repeatedly for each of the other
+// sequences.
+//
+// See also SetSeqs() and SetSeq2().
+func (m *SequenceMatcher) SetSeq1(a []string) {
+ if &a == &m.a {
+ return
+ }
+ m.a = a
+ m.matchingBlocks = nil
+ m.opCodes = nil
+}
+
+// Set the second sequence to be compared. The first sequence to be compared is
+// not changed.
+func (m *SequenceMatcher) SetSeq2(b []string) {
+ if &b == &m.b {
+ return
+ }
+ m.b = b
+ m.matchingBlocks = nil
+ m.opCodes = nil
+ m.fullBCount = nil
+ m.chainB()
+}
+
+func (m *SequenceMatcher) chainB() {
+ // Populate line -> index mapping
+ b2j := map[string][]int{}
+ for i, s := range m.b {
+ indices := b2j[s]
+ indices = append(indices, i)
+ b2j[s] = indices
+ }
+
+ // Purge junk elements
+ m.bJunk = map[string]struct{}{}
+ if m.IsJunk != nil {
+ junk := m.bJunk
+ for s, _ := range b2j {
+ if m.IsJunk(s) {
+ junk[s] = struct{}{}
+ }
+ }
+ for s, _ := range junk {
+ delete(b2j, s)
+ }
+ }
+
+ // Purge remaining popular elements
+ popular := map[string]struct{}{}
+ n := len(m.b)
+ if m.autoJunk && n >= 200 {
+ ntest := n/100 + 1
+ for s, indices := range b2j {
+ if len(indices) > ntest {
+ popular[s] = struct{}{}
+ }
+ }
+ for s, _ := range popular {
+ delete(b2j, s)
+ }
+ }
+ m.bPopular = popular
+ m.b2j = b2j
+}
+
+func (m *SequenceMatcher) isBJunk(s string) bool {
+ _, ok := m.bJunk[s]
+ return ok
+}
+
+// Find longest matching block in a[alo:ahi] and b[blo:bhi].
+//
+// If IsJunk is not defined:
+//
+// Return (i,j,k) such that a[i:i+k] is equal to b[j:j+k], where
+// alo <= i <= i+k <= ahi
+// blo <= j <= j+k <= bhi
+// and for all (i',j',k') meeting those conditions,
+// k >= k'
+// i <= i'
+// and if i == i', j <= j'
+//
+// In other words, of all maximal matching blocks, return one that
+// starts earliest in a, and of all those maximal matching blocks that
+// start earliest in a, return the one that starts earliest in b.
+//
+// If IsJunk is defined, first the longest matching block is
+// determined as above, but with the additional restriction that no
+// junk element appears in the block. Then that block is extended as
+// far as possible by matching (only) junk elements on both sides. So
+// the resulting block never matches on junk except as identical junk
+// happens to be adjacent to an "interesting" match.
+//
+// If no blocks match, return (alo, blo, 0).
+func (m *SequenceMatcher) findLongestMatch(alo, ahi, blo, bhi int) Match {
+ // CAUTION: stripping common prefix or suffix would be incorrect.
+ // E.g.,
+ // ab
+ // acab
+ // Longest matching block is "ab", but if common prefix is
+ // stripped, it's "a" (tied with "b"). UNIX(tm) diff does so
+ // strip, so ends up claiming that ab is changed to acab by
+ // inserting "ca" in the middle. That's minimal but unintuitive:
+ // "it's obvious" that someone inserted "ac" at the front.
+ // Windiff ends up at the same place as diff, but by pairing up
+ // the unique 'b's and then matching the first two 'a's.
+ besti, bestj, bestsize := alo, blo, 0
+
+ // find longest junk-free match
+ // during an iteration of the loop, j2len[j] = length of longest
+ // junk-free match ending with a[i-1] and b[j]
+ j2len := map[int]int{}
+ for i := alo; i != ahi; i++ {
+ // look at all instances of a[i] in b; note that because
+ // b2j has no junk keys, the loop is skipped if a[i] is junk
+ newj2len := map[int]int{}
+ for _, j := range m.b2j[m.a[i]] {
+ // a[i] matches b[j]
+ if j < blo {
+ continue
+ }
+ if j >= bhi {
+ break
+ }
+ k := j2len[j-1] + 1
+ newj2len[j] = k
+ if k > bestsize {
+ besti, bestj, bestsize = i-k+1, j-k+1, k
+ }
+ }
+ j2len = newj2len
+ }
+
+ // Extend the best by non-junk elements on each end. In particular,
+ // "popular" non-junk elements aren't in b2j, which greatly speeds
+ // the inner loop above, but also means "the best" match so far
+ // doesn't contain any junk *or* popular non-junk elements.
+ for besti > alo && bestj > blo && !m.isBJunk(m.b[bestj-1]) &&
+ m.a[besti-1] == m.b[bestj-1] {
+ besti, bestj, bestsize = besti-1, bestj-1, bestsize+1
+ }
+ for besti+bestsize < ahi && bestj+bestsize < bhi &&
+ !m.isBJunk(m.b[bestj+bestsize]) &&
+ m.a[besti+bestsize] == m.b[bestj+bestsize] {
+ bestsize += 1
+ }
+
+ // Now that we have a wholly interesting match (albeit possibly
+ // empty!), we may as well suck up the matching junk on each
+ // side of it too. Can't think of a good reason not to, and it
+ // saves post-processing the (possibly considerable) expense of
+ // figuring out what to do with it. In the case of an empty
+ // interesting match, this is clearly the right thing to do,
+ // because no other kind of match is possible in the regions.
+ for besti > alo && bestj > blo && m.isBJunk(m.b[bestj-1]) &&
+ m.a[besti-1] == m.b[bestj-1] {
+ besti, bestj, bestsize = besti-1, bestj-1, bestsize+1
+ }
+ for besti+bestsize < ahi && bestj+bestsize < bhi &&
+ m.isBJunk(m.b[bestj+bestsize]) &&
+ m.a[besti+bestsize] == m.b[bestj+bestsize] {
+ bestsize += 1
+ }
+
+ return Match{A: besti, B: bestj, Size: bestsize}
+}
+
+// Return list of triples describing matching subsequences.
+//
+// Each triple is of the form (i, j, n), and means that
+// a[i:i+n] == b[j:j+n]. The triples are monotonically increasing in
+// i and in j. It's also guaranteed that if (i, j, n) and (i', j', n') are
+// adjacent triples in the list, and the second is not the last triple in the
+// list, then i+n != i' or j+n != j'. IOW, adjacent triples never describe
+// adjacent equal blocks.
+//
+// The last triple is a dummy, (len(a), len(b), 0), and is the only
+// triple with n==0.
+func (m *SequenceMatcher) GetMatchingBlocks() []Match {
+ if m.matchingBlocks != nil {
+ return m.matchingBlocks
+ }
+
+ var matchBlocks func(alo, ahi, blo, bhi int, matched []Match) []Match
+ matchBlocks = func(alo, ahi, blo, bhi int, matched []Match) []Match {
+ match := m.findLongestMatch(alo, ahi, blo, bhi)
+ i, j, k := match.A, match.B, match.Size
+ if match.Size > 0 {
+ if alo < i && blo < j {
+ matched = matchBlocks(alo, i, blo, j, matched)
+ }
+ matched = append(matched, match)
+ if i+k < ahi && j+k < bhi {
+ matched = matchBlocks(i+k, ahi, j+k, bhi, matched)
+ }
+ }
+ return matched
+ }
+ matched := matchBlocks(0, len(m.a), 0, len(m.b), nil)
+
+ // It's possible that we have adjacent equal blocks in the
+ // matching_blocks list now.
+ nonAdjacent := []Match{}
+ i1, j1, k1 := 0, 0, 0
+ for _, b := range matched {
+ // Is this block adjacent to i1, j1, k1?
+ i2, j2, k2 := b.A, b.B, b.Size
+ if i1+k1 == i2 && j1+k1 == j2 {
+ // Yes, so collapse them -- this just increases the length of
+ // the first block by the length of the second, and the first
+ // block so lengthened remains the block to compare against.
+ k1 += k2
+ } else {
+ // Not adjacent. Remember the first block (k1==0 means it's
+ // the dummy we started with), and make the second block the
+ // new block to compare against.
+ if k1 > 0 {
+ nonAdjacent = append(nonAdjacent, Match{i1, j1, k1})
+ }
+ i1, j1, k1 = i2, j2, k2
+ }
+ }
+ if k1 > 0 {
+ nonAdjacent = append(nonAdjacent, Match{i1, j1, k1})
+ }
+
+ nonAdjacent = append(nonAdjacent, Match{len(m.a), len(m.b), 0})
+ m.matchingBlocks = nonAdjacent
+ return m.matchingBlocks
+}
+
+// Return list of 5-tuples describing how to turn a into b.
+//
+// Each tuple is of the form (tag, i1, i2, j1, j2). The first tuple
+// has i1 == j1 == 0, and remaining tuples have i1 == the i2 from the
+// tuple preceding it, and likewise for j1 == the previous j2.
+//
+// The tags are characters, with these meanings:
+//
+// 'r' (replace): a[i1:i2] should be replaced by b[j1:j2]
+//
+// 'd' (delete): a[i1:i2] should be deleted, j1==j2 in this case.
+//
+// 'i' (insert): b[j1:j2] should be inserted at a[i1:i1], i1==i2 in this case.
+//
+// 'e' (equal): a[i1:i2] == b[j1:j2]
+func (m *SequenceMatcher) GetOpCodes() []OpCode {
+ if m.opCodes != nil {
+ return m.opCodes
+ }
+ i, j := 0, 0
+ matching := m.GetMatchingBlocks()
+ opCodes := make([]OpCode, 0, len(matching))
+ for _, m := range matching {
+ // invariant: we've pumped out correct diffs to change
+ // a[:i] into b[:j], and the next matching block is
+ // a[ai:ai+size] == b[bj:bj+size]. So we need to pump
+ // out a diff to change a[i:ai] into b[j:bj], pump out
+ // the matching block, and move (i,j) beyond the match
+ ai, bj, size := m.A, m.B, m.Size
+ tag := byte(0)
+ if i < ai && j < bj {
+ tag = 'r'
+ } else if i < ai {
+ tag = 'd'
+ } else if j < bj {
+ tag = 'i'
+ }
+ if tag > 0 {
+ opCodes = append(opCodes, OpCode{tag, i, ai, j, bj})
+ }
+ i, j = ai+size, bj+size
+ // the list of matching blocks is terminated by a
+ // sentinel with size 0
+ if size > 0 {
+ opCodes = append(opCodes, OpCode{'e', ai, i, bj, j})
+ }
+ }
+ m.opCodes = opCodes
+ return m.opCodes
+}
+
+// Isolate change clusters by eliminating ranges with no changes.
+//
+// Return a generator of groups with up to n lines of context.
+// Each group is in the same format as returned by GetOpCodes().
+func (m *SequenceMatcher) GetGroupedOpCodes(n int) [][]OpCode {
+ if n < 0 {
+ n = 3
+ }
+ codes := m.GetOpCodes()
+ if len(codes) == 0 {
+ codes = []OpCode{OpCode{'e', 0, 1, 0, 1}}
+ }
+ // Fixup leading and trailing groups if they show no changes.
+ if codes[0].Tag == 'e' {
+ c := codes[0]
+ i1, i2, j1, j2 := c.I1, c.I2, c.J1, c.J2
+ codes[0] = OpCode{c.Tag, max(i1, i2-n), i2, max(j1, j2-n), j2}
+ }
+ if codes[len(codes)-1].Tag == 'e' {
+ c := codes[len(codes)-1]
+ i1, i2, j1, j2 := c.I1, c.I2, c.J1, c.J2
+ codes[len(codes)-1] = OpCode{c.Tag, i1, min(i2, i1+n), j1, min(j2, j1+n)}
+ }
+ nn := n + n
+ groups := [][]OpCode{}
+ group := []OpCode{}
+ for _, c := range codes {
+ i1, i2, j1, j2 := c.I1, c.I2, c.J1, c.J2
+ // End the current group and start a new one whenever
+ // there is a large range with no changes.
+ if c.Tag == 'e' && i2-i1 > nn {
+ group = append(group, OpCode{c.Tag, i1, min(i2, i1+n),
+ j1, min(j2, j1+n)})
+ groups = append(groups, group)
+ group = []OpCode{}
+ i1, j1 = max(i1, i2-n), max(j1, j2-n)
+ }
+ group = append(group, OpCode{c.Tag, i1, i2, j1, j2})
+ }
+ if len(group) > 0 && !(len(group) == 1 && group[0].Tag == 'e') {
+ groups = append(groups, group)
+ }
+ return groups
+}
+
+// Return a measure of the sequences' similarity (float in [0,1]).
+//
+// Where T is the total number of elements in both sequences, and
+// M is the number of matches, this is 2.0*M / T.
+// Note that this is 1 if the sequences are identical, and 0 if
+// they have nothing in common.
+//
+// .Ratio() is expensive to compute if you haven't already computed
+// .GetMatchingBlocks() or .GetOpCodes(), in which case you may
+// want to try .QuickRatio() or .RealQuickRation() first to get an
+// upper bound.
+func (m *SequenceMatcher) Ratio() float64 {
+ matches := 0
+ for _, m := range m.GetMatchingBlocks() {
+ matches += m.Size
+ }
+ return calculateRatio(matches, len(m.a)+len(m.b))
+}
+
+// Return an upper bound on ratio() relatively quickly.
+//
+// This isn't defined beyond that it is an upper bound on .Ratio(), and
+// is faster to compute.
+func (m *SequenceMatcher) QuickRatio() float64 {
+ // viewing a and b as multisets, set matches to the cardinality
+ // of their intersection; this counts the number of matches
+ // without regard to order, so is clearly an upper bound
+ if m.fullBCount == nil {
+ m.fullBCount = map[string]int{}
+ for _, s := range m.b {
+ m.fullBCount[s] = m.fullBCount[s] + 1
+ }
+ }
+
+ // avail[x] is the number of times x appears in 'b' less the
+ // number of times we've seen it in 'a' so far ... kinda
+ avail := map[string]int{}
+ matches := 0
+ for _, s := range m.a {
+ n, ok := avail[s]
+ if !ok {
+ n = m.fullBCount[s]
+ }
+ avail[s] = n - 1
+ if n > 0 {
+ matches += 1
+ }
+ }
+ return calculateRatio(matches, len(m.a)+len(m.b))
+}
+
+// Return an upper bound on ratio() very quickly.
+//
+// This isn't defined beyond that it is an upper bound on .Ratio(), and
+// is faster to compute than either .Ratio() or .QuickRatio().
+func (m *SequenceMatcher) RealQuickRatio() float64 {
+ la, lb := len(m.a), len(m.b)
+ return calculateRatio(min(la, lb), la+lb)
+}
+
+// Convert range to the "ed" format
+func formatRangeUnified(start, stop int) string {
+ // Per the diff spec at http://www.unix.org/single_unix_specification/
+ beginning := start + 1 // lines start numbering with one
+ length := stop - start
+ if length == 1 {
+ return fmt.Sprintf("%d", beginning)
+ }
+ if length == 0 {
+ beginning -= 1 // empty ranges begin at line just before the range
+ }
+ return fmt.Sprintf("%d,%d", beginning, length)
+}
+
+// Unified diff parameters
+type UnifiedDiff struct {
+ A []string // First sequence lines
+ FromFile string // First file name
+ FromDate string // First file time
+ B []string // Second sequence lines
+ ToFile string // Second file name
+ ToDate string // Second file time
+ Eol string // Headers end of line, defaults to LF
+ Context int // Number of context lines
+}
+
+// Compare two sequences of lines; generate the delta as a unified diff.
+//
+// Unified diffs are a compact way of showing line changes and a few
+// lines of context. The number of context lines is set by 'n' which
+// defaults to three.
+//
+// By default, the diff control lines (those with ---, +++, or @@) are
+// created with a trailing newline. This is helpful so that inputs
+// created from file.readlines() result in diffs that are suitable for
+// file.writelines() since both the inputs and outputs have trailing
+// newlines.
+//
+// For inputs that do not have trailing newlines, set the lineterm
+// argument to "" so that the output will be uniformly newline free.
+//
+// The unidiff format normally has a header for filenames and modification
+// times. Any or all of these may be specified using strings for
+// 'fromfile', 'tofile', 'fromfiledate', and 'tofiledate'.
+// The modification times are normally expressed in the ISO 8601 format.
+func WriteUnifiedDiff(writer io.Writer, diff UnifiedDiff) error {
+ buf := bufio.NewWriter(writer)
+ defer buf.Flush()
+ wf := func(format string, args ...interface{}) error {
+ _, err := buf.WriteString(fmt.Sprintf(format, args...))
+ return err
+ }
+ ws := func(s string) error {
+ _, err := buf.WriteString(s)
+ return err
+ }
+
+ if len(diff.Eol) == 0 {
+ diff.Eol = "\n"
+ }
+
+ started := false
+ m := NewMatcher(diff.A, diff.B)
+ for _, g := range m.GetGroupedOpCodes(diff.Context) {
+ if !started {
+ started = true
+ fromDate := ""
+ if len(diff.FromDate) > 0 {
+ fromDate = "\t" + diff.FromDate
+ }
+ toDate := ""
+ if len(diff.ToDate) > 0 {
+ toDate = "\t" + diff.ToDate
+ }
+ if diff.FromFile != "" || diff.ToFile != "" {
+ err := wf("--- %s%s%s", diff.FromFile, fromDate, diff.Eol)
+ if err != nil {
+ return err
+ }
+ err = wf("+++ %s%s%s", diff.ToFile, toDate, diff.Eol)
+ if err != nil {
+ return err
+ }
+ }
+ }
+ first, last := g[0], g[len(g)-1]
+ range1 := formatRangeUnified(first.I1, last.I2)
+ range2 := formatRangeUnified(first.J1, last.J2)
+ if err := wf("@@ -%s +%s @@%s", range1, range2, diff.Eol); err != nil {
+ return err
+ }
+ for _, c := range g {
+ i1, i2, j1, j2 := c.I1, c.I2, c.J1, c.J2
+ if c.Tag == 'e' {
+ for _, line := range diff.A[i1:i2] {
+ if err := ws(" " + line); err != nil {
+ return err
+ }
+ }
+ continue
+ }
+ if c.Tag == 'r' || c.Tag == 'd' {
+ for _, line := range diff.A[i1:i2] {
+ if err := ws("-" + line); err != nil {
+ return err
+ }
+ }
+ }
+ if c.Tag == 'r' || c.Tag == 'i' {
+ for _, line := range diff.B[j1:j2] {
+ if err := ws("+" + line); err != nil {
+ return err
+ }
+ }
+ }
+ }
+ }
+ return nil
+}
+
+// Like WriteUnifiedDiff but returns the diff a string.
+func GetUnifiedDiffString(diff UnifiedDiff) (string, error) {
+ w := &bytes.Buffer{}
+ err := WriteUnifiedDiff(w, diff)
+ return string(w.Bytes()), err
+}
+
+// Convert range to the "ed" format.
+func formatRangeContext(start, stop int) string {
+ // Per the diff spec at http://www.unix.org/single_unix_specification/
+ beginning := start + 1 // lines start numbering with one
+ length := stop - start
+ if length == 0 {
+ beginning -= 1 // empty ranges begin at line just before the range
+ }
+ if length <= 1 {
+ return fmt.Sprintf("%d", beginning)
+ }
+ return fmt.Sprintf("%d,%d", beginning, beginning+length-1)
+}
+
+type ContextDiff UnifiedDiff
+
+// Compare two sequences of lines; generate the delta as a context diff.
+//
+// Context diffs are a compact way of showing line changes and a few
+// lines of context. The number of context lines is set by diff.Context
+// which defaults to three.
+//
+// By default, the diff control lines (those with *** or ---) are
+// created with a trailing newline.
+//
+// For inputs that do not have trailing newlines, set the diff.Eol
+// argument to "" so that the output will be uniformly newline free.
+//
+// The context diff format normally has a header for filenames and
+// modification times. Any or all of these may be specified using
+// strings for diff.FromFile, diff.ToFile, diff.FromDate, diff.ToDate.
+// The modification times are normally expressed in the ISO 8601 format.
+// If not specified, the strings default to blanks.
+func WriteContextDiff(writer io.Writer, diff ContextDiff) error {
+ buf := bufio.NewWriter(writer)
+ defer buf.Flush()
+ var diffErr error
+ wf := func(format string, args ...interface{}) {
+ _, err := buf.WriteString(fmt.Sprintf(format, args...))
+ if diffErr == nil && err != nil {
+ diffErr = err
+ }
+ }
+ ws := func(s string) {
+ _, err := buf.WriteString(s)
+ if diffErr == nil && err != nil {
+ diffErr = err
+ }
+ }
+
+ if len(diff.Eol) == 0 {
+ diff.Eol = "\n"
+ }
+
+ prefix := map[byte]string{
+ 'i': "+ ",
+ 'd': "- ",
+ 'r': "! ",
+ 'e': " ",
+ }
+
+ started := false
+ m := NewMatcher(diff.A, diff.B)
+ for _, g := range m.GetGroupedOpCodes(diff.Context) {
+ if !started {
+ started = true
+ fromDate := ""
+ if len(diff.FromDate) > 0 {
+ fromDate = "\t" + diff.FromDate
+ }
+ toDate := ""
+ if len(diff.ToDate) > 0 {
+ toDate = "\t" + diff.ToDate
+ }
+ if diff.FromFile != "" || diff.ToFile != "" {
+ wf("*** %s%s%s", diff.FromFile, fromDate, diff.Eol)
+ wf("--- %s%s%s", diff.ToFile, toDate, diff.Eol)
+ }
+ }
+
+ first, last := g[0], g[len(g)-1]
+ ws("***************" + diff.Eol)
+
+ range1 := formatRangeContext(first.I1, last.I2)
+ wf("*** %s ****%s", range1, diff.Eol)
+ for _, c := range g {
+ if c.Tag == 'r' || c.Tag == 'd' {
+ for _, cc := range g {
+ if cc.Tag == 'i' {
+ continue
+ }
+ for _, line := range diff.A[cc.I1:cc.I2] {
+ ws(prefix[cc.Tag] + line)
+ }
+ }
+ break
+ }
+ }
+
+ range2 := formatRangeContext(first.J1, last.J2)
+ wf("--- %s ----%s", range2, diff.Eol)
+ for _, c := range g {
+ if c.Tag == 'r' || c.Tag == 'i' {
+ for _, cc := range g {
+ if cc.Tag == 'd' {
+ continue
+ }
+ for _, line := range diff.B[cc.J1:cc.J2] {
+ ws(prefix[cc.Tag] + line)
+ }
+ }
+ break
+ }
+ }
+ }
+ return diffErr
+}
+
+// Like WriteContextDiff but returns the diff a string.
+func GetContextDiffString(diff ContextDiff) (string, error) {
+ w := &bytes.Buffer{}
+ err := WriteContextDiff(w, diff)
+ return string(w.Bytes()), err
+}
+
+// Split a string on "\n" while preserving them. The output can be used
+// as input for UnifiedDiff and ContextDiff structures.
+func SplitLines(s string) []string {
+ lines := strings.SplitAfter(s, "\n")
+ lines[len(lines)-1] += "\n"
+ return lines
+}
diff --git a/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/.gitignore b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/.gitignore
new file mode 100644
index 00000000..83c8f823
--- /dev/null
+++ b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/.gitignore
@@ -0,0 +1,9 @@
+*.[68]
+*.a
+*.out
+*.swp
+_obj
+_testmain.go
+cmd/metrics-bench/metrics-bench
+cmd/metrics-example/metrics-example
+cmd/never-read/never-read
diff --git a/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/.travis.yml b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/.travis.yml
new file mode 100644
index 00000000..117763e6
--- /dev/null
+++ b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/.travis.yml
@@ -0,0 +1,17 @@
+language: go
+
+go:
+ - 1.3
+ - 1.4
+ - 1.5
+ - 1.6
+ - 1.7
+ - 1.8
+ - 1.9
+
+script:
+ - ./validate.sh
+
+# this should give us faster builds according to
+# http://docs.travis-ci.com/user/migrating-from-legacy/
+sudo: false
diff --git a/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/LICENSE b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/LICENSE
new file mode 100644
index 00000000..363fa9ee
--- /dev/null
+++ b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/LICENSE
@@ -0,0 +1,29 @@
+Copyright 2012 Richard Crowley. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+ 1. Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+
+ 2. Redistributions in binary form must reproduce the above
+ copyright notice, this list of conditions and the following
+ disclaimer in the documentation and/or other materials provided
+ with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY RICHARD CROWLEY ``AS IS'' AND ANY EXPRESS
+OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL RICHARD CROWLEY OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+THE POSSIBILITY OF SUCH DAMAGE.
+
+The views and conclusions contained in the software and documentation
+are those of the authors and should not be interpreted as representing
+official policies, either expressed or implied, of Richard Crowley.
diff --git a/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/README.md b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/README.md
new file mode 100644
index 00000000..b7356b5f
--- /dev/null
+++ b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/README.md
@@ -0,0 +1,168 @@
+go-metrics
+==========
+
+
+
+Go port of Coda Hale's Metrics library: .
+
+Documentation: .
+
+Usage
+-----
+
+Create and update metrics:
+
+```go
+c := metrics.NewCounter()
+metrics.Register("foo", c)
+c.Inc(47)
+
+g := metrics.NewGauge()
+metrics.Register("bar", g)
+g.Update(47)
+
+r := NewRegistry()
+g := metrics.NewRegisteredFunctionalGauge("cache-evictions", r, func() int64 { return cache.getEvictionsCount() })
+
+s := metrics.NewExpDecaySample(1028, 0.015) // or metrics.NewUniformSample(1028)
+h := metrics.NewHistogram(s)
+metrics.Register("baz", h)
+h.Update(47)
+
+m := metrics.NewMeter()
+metrics.Register("quux", m)
+m.Mark(47)
+
+t := metrics.NewTimer()
+metrics.Register("bang", t)
+t.Time(func() {})
+t.Update(47)
+```
+
+Register() is not threadsafe. For threadsafe metric registration use
+GetOrRegister:
+
+```go
+t := metrics.GetOrRegisterTimer("account.create.latency", nil)
+t.Time(func() {})
+t.Update(47)
+```
+
+**NOTE:** Be sure to unregister short-lived meters and timers otherwise they will
+leak memory:
+
+```go
+// Will call Stop() on the Meter to allow for garbage collection
+metrics.Unregister("quux")
+// Or similarly for a Timer that embeds a Meter
+metrics.Unregister("bang")
+```
+
+Periodically log every metric in human-readable form to standard error:
+
+```go
+go metrics.Log(metrics.DefaultRegistry, 5 * time.Second, log.New(os.Stderr, "metrics: ", log.Lmicroseconds))
+```
+
+Periodically log every metric in slightly-more-parseable form to syslog:
+
+```go
+w, _ := syslog.Dial("unixgram", "/dev/log", syslog.LOG_INFO, "metrics")
+go metrics.Syslog(metrics.DefaultRegistry, 60e9, w)
+```
+
+Periodically emit every metric to Graphite using the [Graphite client](https://github.com/cyberdelia/go-metrics-graphite):
+
+```go
+
+import "github.com/cyberdelia/go-metrics-graphite"
+
+addr, _ := net.ResolveTCPAddr("tcp", "127.0.0.1:2003")
+go graphite.Graphite(metrics.DefaultRegistry, 10e9, "metrics", addr)
+```
+
+Periodically emit every metric into InfluxDB:
+
+**NOTE:** this has been pulled out of the library due to constant fluctuations
+in the InfluxDB API. In fact, all client libraries are on their way out. see
+issues [#121](https://github.com/rcrowley/go-metrics/issues/121) and
+[#124](https://github.com/rcrowley/go-metrics/issues/124) for progress and details.
+
+```go
+import "github.com/vrischmann/go-metrics-influxdb"
+
+go influxdb.InfluxDB(metrics.DefaultRegistry,
+ 10e9,
+ "127.0.0.1:8086",
+ "database-name",
+ "username",
+ "password"
+)
+```
+
+Periodically upload every metric to Librato using the [Librato client](https://github.com/mihasya/go-metrics-librato):
+
+**Note**: the client included with this repository under the `librato` package
+has been deprecated and moved to the repository linked above.
+
+```go
+import "github.com/mihasya/go-metrics-librato"
+
+go librato.Librato(metrics.DefaultRegistry,
+ 10e9, // interval
+ "example@example.com", // account owner email address
+ "token", // Librato API token
+ "hostname", // source
+ []float64{0.95}, // percentiles to send
+ time.Millisecond, // time unit
+)
+```
+
+Periodically emit every metric to StatHat:
+
+```go
+import "github.com/rcrowley/go-metrics/stathat"
+
+go stathat.Stathat(metrics.DefaultRegistry, 10e9, "example@example.com")
+```
+
+Maintain all metrics along with expvars at `/debug/metrics`:
+
+This uses the same mechanism as [the official expvar](http://golang.org/pkg/expvar/)
+but exposed under `/debug/metrics`, which shows a json representation of all your usual expvars
+as well as all your go-metrics.
+
+
+```go
+import "github.com/rcrowley/go-metrics/exp"
+
+exp.Exp(metrics.DefaultRegistry)
+```
+
+Installation
+------------
+
+```sh
+go get github.com/rcrowley/go-metrics
+```
+
+StatHat support additionally requires their Go client:
+
+```sh
+go get github.com/stathat/go
+```
+
+Publishing Metrics
+------------------
+
+Clients are available for the following destinations:
+
+* Librato - https://github.com/mihasya/go-metrics-librato
+* Graphite - https://github.com/cyberdelia/go-metrics-graphite
+* InfluxDB - https://github.com/vrischmann/go-metrics-influxdb
+* Ganglia - https://github.com/appscode/metlia
+* Prometheus - https://github.com/deathowl/go-metrics-prometheus
+* DataDog - https://github.com/syntaqx/go-metrics-datadog
+* SignalFX - https://github.com/pascallouisperez/go-metrics-signalfx
+* Honeycomb - https://github.com/getspine/go-metrics-honeycomb
+* Wavefront - https://github.com/wavefrontHQ/go-metrics-wavefront
diff --git a/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/counter.go b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/counter.go
new file mode 100644
index 00000000..bb7b039c
--- /dev/null
+++ b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/counter.go
@@ -0,0 +1,112 @@
+package metrics
+
+import "sync/atomic"
+
+// Counters hold an int64 value that can be incremented and decremented.
+type Counter interface {
+ Clear()
+ Count() int64
+ Dec(int64)
+ Inc(int64)
+ Snapshot() Counter
+}
+
+// GetOrRegisterCounter returns an existing Counter or constructs and registers
+// a new StandardCounter.
+func GetOrRegisterCounter(name string, r Registry) Counter {
+ if nil == r {
+ r = DefaultRegistry
+ }
+ return r.GetOrRegister(name, NewCounter).(Counter)
+}
+
+// NewCounter constructs a new StandardCounter.
+func NewCounter() Counter {
+ if UseNilMetrics {
+ return NilCounter{}
+ }
+ return &StandardCounter{0}
+}
+
+// NewRegisteredCounter constructs and registers a new StandardCounter.
+func NewRegisteredCounter(name string, r Registry) Counter {
+ c := NewCounter()
+ if nil == r {
+ r = DefaultRegistry
+ }
+ r.Register(name, c)
+ return c
+}
+
+// CounterSnapshot is a read-only copy of another Counter.
+type CounterSnapshot int64
+
+// Clear panics.
+func (CounterSnapshot) Clear() {
+ panic("Clear called on a CounterSnapshot")
+}
+
+// Count returns the count at the time the snapshot was taken.
+func (c CounterSnapshot) Count() int64 { return int64(c) }
+
+// Dec panics.
+func (CounterSnapshot) Dec(int64) {
+ panic("Dec called on a CounterSnapshot")
+}
+
+// Inc panics.
+func (CounterSnapshot) Inc(int64) {
+ panic("Inc called on a CounterSnapshot")
+}
+
+// Snapshot returns the snapshot.
+func (c CounterSnapshot) Snapshot() Counter { return c }
+
+// NilCounter is a no-op Counter.
+type NilCounter struct{}
+
+// Clear is a no-op.
+func (NilCounter) Clear() {}
+
+// Count is a no-op.
+func (NilCounter) Count() int64 { return 0 }
+
+// Dec is a no-op.
+func (NilCounter) Dec(i int64) {}
+
+// Inc is a no-op.
+func (NilCounter) Inc(i int64) {}
+
+// Snapshot is a no-op.
+func (NilCounter) Snapshot() Counter { return NilCounter{} }
+
+// StandardCounter is the standard implementation of a Counter and uses the
+// sync/atomic package to manage a single int64 value.
+type StandardCounter struct {
+ count int64
+}
+
+// Clear sets the counter to zero.
+func (c *StandardCounter) Clear() {
+ atomic.StoreInt64(&c.count, 0)
+}
+
+// Count returns the current count.
+func (c *StandardCounter) Count() int64 {
+ return atomic.LoadInt64(&c.count)
+}
+
+// Dec decrements the counter by the given amount.
+func (c *StandardCounter) Dec(i int64) {
+ atomic.AddInt64(&c.count, -i)
+}
+
+// Inc increments the counter by the given amount.
+func (c *StandardCounter) Inc(i int64) {
+ atomic.AddInt64(&c.count, i)
+}
+
+// Snapshot returns a read-only copy of the counter.
+func (c *StandardCounter) Snapshot() Counter {
+ return CounterSnapshot(c.Count())
+}
diff --git a/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/debug.go b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/debug.go
new file mode 100644
index 00000000..043ccefa
--- /dev/null
+++ b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/debug.go
@@ -0,0 +1,76 @@
+package metrics
+
+import (
+ "runtime/debug"
+ "time"
+)
+
+var (
+ debugMetrics struct {
+ GCStats struct {
+ LastGC Gauge
+ NumGC Gauge
+ Pause Histogram
+ //PauseQuantiles Histogram
+ PauseTotal Gauge
+ }
+ ReadGCStats Timer
+ }
+ gcStats debug.GCStats
+)
+
+// Capture new values for the Go garbage collector statistics exported in
+// debug.GCStats. This is designed to be called as a goroutine.
+func CaptureDebugGCStats(r Registry, d time.Duration) {
+ for _ = range time.Tick(d) {
+ CaptureDebugGCStatsOnce(r)
+ }
+}
+
+// Capture new values for the Go garbage collector statistics exported in
+// debug.GCStats. This is designed to be called in a background goroutine.
+// Giving a registry which has not been given to RegisterDebugGCStats will
+// panic.
+//
+// Be careful (but much less so) with this because debug.ReadGCStats calls
+// the C function runtime·lock(runtime·mheap) which, while not a stop-the-world
+// operation, isn't something you want to be doing all the time.
+func CaptureDebugGCStatsOnce(r Registry) {
+ lastGC := gcStats.LastGC
+ t := time.Now()
+ debug.ReadGCStats(&gcStats)
+ debugMetrics.ReadGCStats.UpdateSince(t)
+
+ debugMetrics.GCStats.LastGC.Update(int64(gcStats.LastGC.UnixNano()))
+ debugMetrics.GCStats.NumGC.Update(int64(gcStats.NumGC))
+ if lastGC != gcStats.LastGC && 0 < len(gcStats.Pause) {
+ debugMetrics.GCStats.Pause.Update(int64(gcStats.Pause[0]))
+ }
+ //debugMetrics.GCStats.PauseQuantiles.Update(gcStats.PauseQuantiles)
+ debugMetrics.GCStats.PauseTotal.Update(int64(gcStats.PauseTotal))
+}
+
+// Register metrics for the Go garbage collector statistics exported in
+// debug.GCStats. The metrics are named by their fully-qualified Go symbols,
+// i.e. debug.GCStats.PauseTotal.
+func RegisterDebugGCStats(r Registry) {
+ debugMetrics.GCStats.LastGC = NewGauge()
+ debugMetrics.GCStats.NumGC = NewGauge()
+ debugMetrics.GCStats.Pause = NewHistogram(NewExpDecaySample(1028, 0.015))
+ //debugMetrics.GCStats.PauseQuantiles = NewHistogram(NewExpDecaySample(1028, 0.015))
+ debugMetrics.GCStats.PauseTotal = NewGauge()
+ debugMetrics.ReadGCStats = NewTimer()
+
+ r.Register("debug.GCStats.LastGC", debugMetrics.GCStats.LastGC)
+ r.Register("debug.GCStats.NumGC", debugMetrics.GCStats.NumGC)
+ r.Register("debug.GCStats.Pause", debugMetrics.GCStats.Pause)
+ //r.Register("debug.GCStats.PauseQuantiles", debugMetrics.GCStats.PauseQuantiles)
+ r.Register("debug.GCStats.PauseTotal", debugMetrics.GCStats.PauseTotal)
+ r.Register("debug.ReadGCStats", debugMetrics.ReadGCStats)
+}
+
+// Allocate an initial slice for gcStats.Pause to avoid allocations during
+// normal operation.
+func init() {
+ gcStats.Pause = make([]time.Duration, 11)
+}
diff --git a/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/ewma.go b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/ewma.go
new file mode 100644
index 00000000..a8183dd7
--- /dev/null
+++ b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/ewma.go
@@ -0,0 +1,138 @@
+package metrics
+
+import (
+ "math"
+ "sync"
+ "sync/atomic"
+)
+
+// EWMAs continuously calculate an exponentially-weighted moving average
+// based on an outside source of clock ticks.
+type EWMA interface {
+ Rate() float64
+ Snapshot() EWMA
+ Tick()
+ Update(int64)
+}
+
+// NewEWMA constructs a new EWMA with the given alpha.
+func NewEWMA(alpha float64) EWMA {
+ if UseNilMetrics {
+ return NilEWMA{}
+ }
+ return &StandardEWMA{alpha: alpha}
+}
+
+// NewEWMA1 constructs a new EWMA for a one-minute moving average.
+func NewEWMA1() EWMA {
+ return NewEWMA(1 - math.Exp(-5.0/60.0/1))
+}
+
+// NewEWMA5 constructs a new EWMA for a five-minute moving average.
+func NewEWMA5() EWMA {
+ return NewEWMA(1 - math.Exp(-5.0/60.0/5))
+}
+
+// NewEWMA15 constructs a new EWMA for a fifteen-minute moving average.
+func NewEWMA15() EWMA {
+ return NewEWMA(1 - math.Exp(-5.0/60.0/15))
+}
+
+// EWMASnapshot is a read-only copy of another EWMA.
+type EWMASnapshot float64
+
+// Rate returns the rate of events per second at the time the snapshot was
+// taken.
+func (a EWMASnapshot) Rate() float64 { return float64(a) }
+
+// Snapshot returns the snapshot.
+func (a EWMASnapshot) Snapshot() EWMA { return a }
+
+// Tick panics.
+func (EWMASnapshot) Tick() {
+ panic("Tick called on an EWMASnapshot")
+}
+
+// Update panics.
+func (EWMASnapshot) Update(int64) {
+ panic("Update called on an EWMASnapshot")
+}
+
+// NilEWMA is a no-op EWMA.
+type NilEWMA struct{}
+
+// Rate is a no-op.
+func (NilEWMA) Rate() float64 { return 0.0 }
+
+// Snapshot is a no-op.
+func (NilEWMA) Snapshot() EWMA { return NilEWMA{} }
+
+// Tick is a no-op.
+func (NilEWMA) Tick() {}
+
+// Update is a no-op.
+func (NilEWMA) Update(n int64) {}
+
+// StandardEWMA is the standard implementation of an EWMA and tracks the number
+// of uncounted events and processes them on each tick. It uses the
+// sync/atomic package to manage uncounted events.
+type StandardEWMA struct {
+ uncounted int64 // /!\ this should be the first member to ensure 64-bit alignment
+ alpha float64
+ rate uint64
+ init uint32
+ mutex sync.Mutex
+}
+
+// Rate returns the moving average rate of events per second.
+func (a *StandardEWMA) Rate() float64 {
+ currentRate := math.Float64frombits(atomic.LoadUint64(&a.rate)) * float64(1e9)
+ return currentRate
+}
+
+// Snapshot returns a read-only copy of the EWMA.
+func (a *StandardEWMA) Snapshot() EWMA {
+ return EWMASnapshot(a.Rate())
+}
+
+// Tick ticks the clock to update the moving average. It assumes it is called
+// every five seconds.
+func (a *StandardEWMA) Tick() {
+ // Optimization to avoid mutex locking in the hot-path.
+ if atomic.LoadUint32(&a.init) == 1 {
+ a.updateRate(a.fetchInstantRate())
+ } else {
+ // Slow-path: this is only needed on the first Tick() and preserves transactional updating
+ // of init and rate in the else block. The first conditional is needed below because
+ // a different thread could have set a.init = 1 between the time of the first atomic load and when
+ // the lock was acquired.
+ a.mutex.Lock()
+ if atomic.LoadUint32(&a.init) == 1 {
+ // The fetchInstantRate() uses atomic loading, which is unecessary in this critical section
+ // but again, this section is only invoked on the first successful Tick() operation.
+ a.updateRate(a.fetchInstantRate())
+ } else {
+ atomic.StoreUint32(&a.init, 1)
+ atomic.StoreUint64(&a.rate, math.Float64bits(a.fetchInstantRate()))
+ }
+ a.mutex.Unlock()
+ }
+}
+
+func (a *StandardEWMA) fetchInstantRate() float64 {
+ count := atomic.LoadInt64(&a.uncounted)
+ atomic.AddInt64(&a.uncounted, -count)
+ instantRate := float64(count) / float64(5e9)
+ return instantRate
+}
+
+func (a *StandardEWMA) updateRate(instantRate float64) {
+ currentRate := math.Float64frombits(atomic.LoadUint64(&a.rate))
+ currentRate += a.alpha * (instantRate - currentRate)
+ atomic.StoreUint64(&a.rate, math.Float64bits(currentRate))
+}
+
+// Update adds n uncounted events.
+func (a *StandardEWMA) Update(n int64) {
+ atomic.AddInt64(&a.uncounted, n)
+}
diff --git a/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/gauge.go b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/gauge.go
new file mode 100644
index 00000000..cb57a938
--- /dev/null
+++ b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/gauge.go
@@ -0,0 +1,120 @@
+package metrics
+
+import "sync/atomic"
+
+// Gauges hold an int64 value that can be set arbitrarily.
+type Gauge interface {
+ Snapshot() Gauge
+ Update(int64)
+ Value() int64
+}
+
+// GetOrRegisterGauge returns an existing Gauge or constructs and registers a
+// new StandardGauge.
+func GetOrRegisterGauge(name string, r Registry) Gauge {
+ if nil == r {
+ r = DefaultRegistry
+ }
+ return r.GetOrRegister(name, NewGauge).(Gauge)
+}
+
+// NewGauge constructs a new StandardGauge.
+func NewGauge() Gauge {
+ if UseNilMetrics {
+ return NilGauge{}
+ }
+ return &StandardGauge{0}
+}
+
+// NewRegisteredGauge constructs and registers a new StandardGauge.
+func NewRegisteredGauge(name string, r Registry) Gauge {
+ c := NewGauge()
+ if nil == r {
+ r = DefaultRegistry
+ }
+ r.Register(name, c)
+ return c
+}
+
+// NewFunctionalGauge constructs a new FunctionalGauge.
+func NewFunctionalGauge(f func() int64) Gauge {
+ if UseNilMetrics {
+ return NilGauge{}
+ }
+ return &FunctionalGauge{value: f}
+}
+
+// NewRegisteredFunctionalGauge constructs and registers a new StandardGauge.
+func NewRegisteredFunctionalGauge(name string, r Registry, f func() int64) Gauge {
+ c := NewFunctionalGauge(f)
+ if nil == r {
+ r = DefaultRegistry
+ }
+ r.Register(name, c)
+ return c
+}
+
+// GaugeSnapshot is a read-only copy of another Gauge.
+type GaugeSnapshot int64
+
+// Snapshot returns the snapshot.
+func (g GaugeSnapshot) Snapshot() Gauge { return g }
+
+// Update panics.
+func (GaugeSnapshot) Update(int64) {
+ panic("Update called on a GaugeSnapshot")
+}
+
+// Value returns the value at the time the snapshot was taken.
+func (g GaugeSnapshot) Value() int64 { return int64(g) }
+
+// NilGauge is a no-op Gauge.
+type NilGauge struct{}
+
+// Snapshot is a no-op.
+func (NilGauge) Snapshot() Gauge { return NilGauge{} }
+
+// Update is a no-op.
+func (NilGauge) Update(v int64) {}
+
+// Value is a no-op.
+func (NilGauge) Value() int64 { return 0 }
+
+// StandardGauge is the standard implementation of a Gauge and uses the
+// sync/atomic package to manage a single int64 value.
+type StandardGauge struct {
+ value int64
+}
+
+// Snapshot returns a read-only copy of the gauge.
+func (g *StandardGauge) Snapshot() Gauge {
+ return GaugeSnapshot(g.Value())
+}
+
+// Update updates the gauge's value.
+func (g *StandardGauge) Update(v int64) {
+ atomic.StoreInt64(&g.value, v)
+}
+
+// Value returns the gauge's current value.
+func (g *StandardGauge) Value() int64 {
+ return atomic.LoadInt64(&g.value)
+}
+
+// FunctionalGauge returns value from given function
+type FunctionalGauge struct {
+ value func() int64
+}
+
+// Value returns the gauge's current value.
+func (g FunctionalGauge) Value() int64 {
+ return g.value()
+}
+
+// Snapshot returns the snapshot.
+func (g FunctionalGauge) Snapshot() Gauge { return GaugeSnapshot(g.Value()) }
+
+// Update panics.
+func (FunctionalGauge) Update(int64) {
+ panic("Update called on a FunctionalGauge")
+}
diff --git a/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/gauge_float64.go b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/gauge_float64.go
new file mode 100644
index 00000000..3962e6db
--- /dev/null
+++ b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/gauge_float64.go
@@ -0,0 +1,125 @@
+package metrics
+
+import (
+ "math"
+ "sync/atomic"
+)
+
+// GaugeFloat64s hold a float64 value that can be set arbitrarily.
+type GaugeFloat64 interface {
+ Snapshot() GaugeFloat64
+ Update(float64)
+ Value() float64
+}
+
+// GetOrRegisterGaugeFloat64 returns an existing GaugeFloat64 or constructs and registers a
+// new StandardGaugeFloat64.
+func GetOrRegisterGaugeFloat64(name string, r Registry) GaugeFloat64 {
+ if nil == r {
+ r = DefaultRegistry
+ }
+ return r.GetOrRegister(name, NewGaugeFloat64()).(GaugeFloat64)
+}
+
+// NewGaugeFloat64 constructs a new StandardGaugeFloat64.
+func NewGaugeFloat64() GaugeFloat64 {
+ if UseNilMetrics {
+ return NilGaugeFloat64{}
+ }
+ return &StandardGaugeFloat64{
+ value: 0.0,
+ }
+}
+
+// NewRegisteredGaugeFloat64 constructs and registers a new StandardGaugeFloat64.
+func NewRegisteredGaugeFloat64(name string, r Registry) GaugeFloat64 {
+ c := NewGaugeFloat64()
+ if nil == r {
+ r = DefaultRegistry
+ }
+ r.Register(name, c)
+ return c
+}
+
+// NewFunctionalGauge constructs a new FunctionalGauge.
+func NewFunctionalGaugeFloat64(f func() float64) GaugeFloat64 {
+ if UseNilMetrics {
+ return NilGaugeFloat64{}
+ }
+ return &FunctionalGaugeFloat64{value: f}
+}
+
+// NewRegisteredFunctionalGauge constructs and registers a new StandardGauge.
+func NewRegisteredFunctionalGaugeFloat64(name string, r Registry, f func() float64) GaugeFloat64 {
+ c := NewFunctionalGaugeFloat64(f)
+ if nil == r {
+ r = DefaultRegistry
+ }
+ r.Register(name, c)
+ return c
+}
+
+// GaugeFloat64Snapshot is a read-only copy of another GaugeFloat64.
+type GaugeFloat64Snapshot float64
+
+// Snapshot returns the snapshot.
+func (g GaugeFloat64Snapshot) Snapshot() GaugeFloat64 { return g }
+
+// Update panics.
+func (GaugeFloat64Snapshot) Update(float64) {
+ panic("Update called on a GaugeFloat64Snapshot")
+}
+
+// Value returns the value at the time the snapshot was taken.
+func (g GaugeFloat64Snapshot) Value() float64 { return float64(g) }
+
+// NilGauge is a no-op Gauge.
+type NilGaugeFloat64 struct{}
+
+// Snapshot is a no-op.
+func (NilGaugeFloat64) Snapshot() GaugeFloat64 { return NilGaugeFloat64{} }
+
+// Update is a no-op.
+func (NilGaugeFloat64) Update(v float64) {}
+
+// Value is a no-op.
+func (NilGaugeFloat64) Value() float64 { return 0.0 }
+
+// StandardGaugeFloat64 is the standard implementation of a GaugeFloat64 and uses
+// sync.Mutex to manage a single float64 value.
+type StandardGaugeFloat64 struct {
+ value uint64
+}
+
+// Snapshot returns a read-only copy of the gauge.
+func (g *StandardGaugeFloat64) Snapshot() GaugeFloat64 {
+ return GaugeFloat64Snapshot(g.Value())
+}
+
+// Update updates the gauge's value.
+func (g *StandardGaugeFloat64) Update(v float64) {
+ atomic.StoreUint64(&g.value, math.Float64bits(v))
+}
+
+// Value returns the gauge's current value.
+func (g *StandardGaugeFloat64) Value() float64 {
+ return math.Float64frombits(atomic.LoadUint64(&g.value))
+}
+
+// FunctionalGaugeFloat64 returns value from given function
+type FunctionalGaugeFloat64 struct {
+ value func() float64
+}
+
+// Value returns the gauge's current value.
+func (g FunctionalGaugeFloat64) Value() float64 {
+ return g.value()
+}
+
+// Snapshot returns the snapshot.
+func (g FunctionalGaugeFloat64) Snapshot() GaugeFloat64 { return GaugeFloat64Snapshot(g.Value()) }
+
+// Update panics.
+func (FunctionalGaugeFloat64) Update(float64) {
+ panic("Update called on a FunctionalGaugeFloat64")
+}
diff --git a/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/graphite.go b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/graphite.go
new file mode 100644
index 00000000..abd0a7d2
--- /dev/null
+++ b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/graphite.go
@@ -0,0 +1,113 @@
+package metrics
+
+import (
+ "bufio"
+ "fmt"
+ "log"
+ "net"
+ "strconv"
+ "strings"
+ "time"
+)
+
+// GraphiteConfig provides a container with configuration parameters for
+// the Graphite exporter
+type GraphiteConfig struct {
+ Addr *net.TCPAddr // Network address to connect to
+ Registry Registry // Registry to be exported
+ FlushInterval time.Duration // Flush interval
+ DurationUnit time.Duration // Time conversion unit for durations
+ Prefix string // Prefix to be prepended to metric names
+ Percentiles []float64 // Percentiles to export from timers and histograms
+}
+
+// Graphite is a blocking exporter function which reports metrics in r
+// to a graphite server located at addr, flushing them every d duration
+// and prepending metric names with prefix.
+func Graphite(r Registry, d time.Duration, prefix string, addr *net.TCPAddr) {
+ GraphiteWithConfig(GraphiteConfig{
+ Addr: addr,
+ Registry: r,
+ FlushInterval: d,
+ DurationUnit: time.Nanosecond,
+ Prefix: prefix,
+ Percentiles: []float64{0.5, 0.75, 0.95, 0.99, 0.999},
+ })
+}
+
+// GraphiteWithConfig is a blocking exporter function just like Graphite,
+// but it takes a GraphiteConfig instead.
+func GraphiteWithConfig(c GraphiteConfig) {
+ log.Printf("WARNING: This go-metrics client has been DEPRECATED! It has been moved to https://github.com/cyberdelia/go-metrics-graphite and will be removed from rcrowley/go-metrics on August 12th 2015")
+ for _ = range time.Tick(c.FlushInterval) {
+ if err := graphite(&c); nil != err {
+ log.Println(err)
+ }
+ }
+}
+
+// GraphiteOnce performs a single submission to Graphite, returning a
+// non-nil error on failed connections. This can be used in a loop
+// similar to GraphiteWithConfig for custom error handling.
+func GraphiteOnce(c GraphiteConfig) error {
+ log.Printf("WARNING: This go-metrics client has been DEPRECATED! It has been moved to https://github.com/cyberdelia/go-metrics-graphite and will be removed from rcrowley/go-metrics on August 12th 2015")
+ return graphite(&c)
+}
+
+func graphite(c *GraphiteConfig) error {
+ now := time.Now().Unix()
+ du := float64(c.DurationUnit)
+ conn, err := net.DialTCP("tcp", nil, c.Addr)
+ if nil != err {
+ return err
+ }
+ defer conn.Close()
+ w := bufio.NewWriter(conn)
+ c.Registry.Each(func(name string, i interface{}) {
+ switch metric := i.(type) {
+ case Counter:
+ fmt.Fprintf(w, "%s.%s.count %d %d\n", c.Prefix, name, metric.Count(), now)
+ case Gauge:
+ fmt.Fprintf(w, "%s.%s.value %d %d\n", c.Prefix, name, metric.Value(), now)
+ case GaugeFloat64:
+ fmt.Fprintf(w, "%s.%s.value %f %d\n", c.Prefix, name, metric.Value(), now)
+ case Histogram:
+ h := metric.Snapshot()
+ ps := h.Percentiles(c.Percentiles)
+ fmt.Fprintf(w, "%s.%s.count %d %d\n", c.Prefix, name, h.Count(), now)
+ fmt.Fprintf(w, "%s.%s.min %d %d\n", c.Prefix, name, h.Min(), now)
+ fmt.Fprintf(w, "%s.%s.max %d %d\n", c.Prefix, name, h.Max(), now)
+ fmt.Fprintf(w, "%s.%s.mean %.2f %d\n", c.Prefix, name, h.Mean(), now)
+ fmt.Fprintf(w, "%s.%s.std-dev %.2f %d\n", c.Prefix, name, h.StdDev(), now)
+ for psIdx, psKey := range c.Percentiles {
+ key := strings.Replace(strconv.FormatFloat(psKey*100.0, 'f', -1, 64), ".", "", 1)
+ fmt.Fprintf(w, "%s.%s.%s-percentile %.2f %d\n", c.Prefix, name, key, ps[psIdx], now)
+ }
+ case Meter:
+ m := metric.Snapshot()
+ fmt.Fprintf(w, "%s.%s.count %d %d\n", c.Prefix, name, m.Count(), now)
+ fmt.Fprintf(w, "%s.%s.one-minute %.2f %d\n", c.Prefix, name, m.Rate1(), now)
+ fmt.Fprintf(w, "%s.%s.five-minute %.2f %d\n", c.Prefix, name, m.Rate5(), now)
+ fmt.Fprintf(w, "%s.%s.fifteen-minute %.2f %d\n", c.Prefix, name, m.Rate15(), now)
+ fmt.Fprintf(w, "%s.%s.mean %.2f %d\n", c.Prefix, name, m.RateMean(), now)
+ case Timer:
+ t := metric.Snapshot()
+ ps := t.Percentiles(c.Percentiles)
+ fmt.Fprintf(w, "%s.%s.count %d %d\n", c.Prefix, name, t.Count(), now)
+ fmt.Fprintf(w, "%s.%s.min %d %d\n", c.Prefix, name, t.Min()/int64(du), now)
+ fmt.Fprintf(w, "%s.%s.max %d %d\n", c.Prefix, name, t.Max()/int64(du), now)
+ fmt.Fprintf(w, "%s.%s.mean %.2f %d\n", c.Prefix, name, t.Mean()/du, now)
+ fmt.Fprintf(w, "%s.%s.std-dev %.2f %d\n", c.Prefix, name, t.StdDev()/du, now)
+ for psIdx, psKey := range c.Percentiles {
+ key := strings.Replace(strconv.FormatFloat(psKey*100.0, 'f', -1, 64), ".", "", 1)
+ fmt.Fprintf(w, "%s.%s.%s-percentile %.2f %d\n", c.Prefix, name, key, ps[psIdx], now)
+ }
+ fmt.Fprintf(w, "%s.%s.one-minute %.2f %d\n", c.Prefix, name, t.Rate1(), now)
+ fmt.Fprintf(w, "%s.%s.five-minute %.2f %d\n", c.Prefix, name, t.Rate5(), now)
+ fmt.Fprintf(w, "%s.%s.fifteen-minute %.2f %d\n", c.Prefix, name, t.Rate15(), now)
+ fmt.Fprintf(w, "%s.%s.mean-rate %.2f %d\n", c.Prefix, name, t.RateMean(), now)
+ }
+ w.Flush()
+ })
+ return nil
+}
diff --git a/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/healthcheck.go b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/healthcheck.go
new file mode 100644
index 00000000..445131ca
--- /dev/null
+++ b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/healthcheck.go
@@ -0,0 +1,61 @@
+package metrics
+
+// Healthchecks hold an error value describing an arbitrary up/down status.
+type Healthcheck interface {
+ Check()
+ Error() error
+ Healthy()
+ Unhealthy(error)
+}
+
+// NewHealthcheck constructs a new Healthcheck which will use the given
+// function to update its status.
+func NewHealthcheck(f func(Healthcheck)) Healthcheck {
+ if UseNilMetrics {
+ return NilHealthcheck{}
+ }
+ return &StandardHealthcheck{nil, f}
+}
+
+// NilHealthcheck is a no-op.
+type NilHealthcheck struct{}
+
+// Check is a no-op.
+func (NilHealthcheck) Check() {}
+
+// Error is a no-op.
+func (NilHealthcheck) Error() error { return nil }
+
+// Healthy is a no-op.
+func (NilHealthcheck) Healthy() {}
+
+// Unhealthy is a no-op.
+func (NilHealthcheck) Unhealthy(error) {}
+
+// StandardHealthcheck is the standard implementation of a Healthcheck and
+// stores the status and a function to call to update the status.
+type StandardHealthcheck struct {
+ err error
+ f func(Healthcheck)
+}
+
+// Check runs the healthcheck function to update the healthcheck's status.
+func (h *StandardHealthcheck) Check() {
+ h.f(h)
+}
+
+// Error returns the healthcheck's status, which will be nil if it is healthy.
+func (h *StandardHealthcheck) Error() error {
+ return h.err
+}
+
+// Healthy marks the healthcheck as healthy.
+func (h *StandardHealthcheck) Healthy() {
+ h.err = nil
+}
+
+// Unhealthy marks the healthcheck as unhealthy. The error is stored and
+// may be retrieved by the Error method.
+func (h *StandardHealthcheck) Unhealthy(err error) {
+ h.err = err
+}
diff --git a/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/histogram.go b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/histogram.go
new file mode 100644
index 00000000..dbc837fe
--- /dev/null
+++ b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/histogram.go
@@ -0,0 +1,202 @@
+package metrics
+
+// Histograms calculate distribution statistics from a series of int64 values.
+type Histogram interface {
+ Clear()
+ Count() int64
+ Max() int64
+ Mean() float64
+ Min() int64
+ Percentile(float64) float64
+ Percentiles([]float64) []float64
+ Sample() Sample
+ Snapshot() Histogram
+ StdDev() float64
+ Sum() int64
+ Update(int64)
+ Variance() float64
+}
+
+// GetOrRegisterHistogram returns an existing Histogram or constructs and
+// registers a new StandardHistogram.
+func GetOrRegisterHistogram(name string, r Registry, s Sample) Histogram {
+ if nil == r {
+ r = DefaultRegistry
+ }
+ return r.GetOrRegister(name, func() Histogram { return NewHistogram(s) }).(Histogram)
+}
+
+// NewHistogram constructs a new StandardHistogram from a Sample.
+func NewHistogram(s Sample) Histogram {
+ if UseNilMetrics {
+ return NilHistogram{}
+ }
+ return &StandardHistogram{sample: s}
+}
+
+// NewRegisteredHistogram constructs and registers a new StandardHistogram from
+// a Sample.
+func NewRegisteredHistogram(name string, r Registry, s Sample) Histogram {
+ c := NewHistogram(s)
+ if nil == r {
+ r = DefaultRegistry
+ }
+ r.Register(name, c)
+ return c
+}
+
+// HistogramSnapshot is a read-only copy of another Histogram.
+type HistogramSnapshot struct {
+ sample *SampleSnapshot
+}
+
+// Clear panics.
+func (*HistogramSnapshot) Clear() {
+ panic("Clear called on a HistogramSnapshot")
+}
+
+// Count returns the number of samples recorded at the time the snapshot was
+// taken.
+func (h *HistogramSnapshot) Count() int64 { return h.sample.Count() }
+
+// Max returns the maximum value in the sample at the time the snapshot was
+// taken.
+func (h *HistogramSnapshot) Max() int64 { return h.sample.Max() }
+
+// Mean returns the mean of the values in the sample at the time the snapshot
+// was taken.
+func (h *HistogramSnapshot) Mean() float64 { return h.sample.Mean() }
+
+// Min returns the minimum value in the sample at the time the snapshot was
+// taken.
+func (h *HistogramSnapshot) Min() int64 { return h.sample.Min() }
+
+// Percentile returns an arbitrary percentile of values in the sample at the
+// time the snapshot was taken.
+func (h *HistogramSnapshot) Percentile(p float64) float64 {
+ return h.sample.Percentile(p)
+}
+
+// Percentiles returns a slice of arbitrary percentiles of values in the sample
+// at the time the snapshot was taken.
+func (h *HistogramSnapshot) Percentiles(ps []float64) []float64 {
+ return h.sample.Percentiles(ps)
+}
+
+// Sample returns the Sample underlying the histogram.
+func (h *HistogramSnapshot) Sample() Sample { return h.sample }
+
+// Snapshot returns the snapshot.
+func (h *HistogramSnapshot) Snapshot() Histogram { return h }
+
+// StdDev returns the standard deviation of the values in the sample at the
+// time the snapshot was taken.
+func (h *HistogramSnapshot) StdDev() float64 { return h.sample.StdDev() }
+
+// Sum returns the sum in the sample at the time the snapshot was taken.
+func (h *HistogramSnapshot) Sum() int64 { return h.sample.Sum() }
+
+// Update panics.
+func (*HistogramSnapshot) Update(int64) {
+ panic("Update called on a HistogramSnapshot")
+}
+
+// Variance returns the variance of inputs at the time the snapshot was taken.
+func (h *HistogramSnapshot) Variance() float64 { return h.sample.Variance() }
+
+// NilHistogram is a no-op Histogram.
+type NilHistogram struct{}
+
+// Clear is a no-op.
+func (NilHistogram) Clear() {}
+
+// Count is a no-op.
+func (NilHistogram) Count() int64 { return 0 }
+
+// Max is a no-op.
+func (NilHistogram) Max() int64 { return 0 }
+
+// Mean is a no-op.
+func (NilHistogram) Mean() float64 { return 0.0 }
+
+// Min is a no-op.
+func (NilHistogram) Min() int64 { return 0 }
+
+// Percentile is a no-op.
+func (NilHistogram) Percentile(p float64) float64 { return 0.0 }
+
+// Percentiles is a no-op.
+func (NilHistogram) Percentiles(ps []float64) []float64 {
+ return make([]float64, len(ps))
+}
+
+// Sample is a no-op.
+func (NilHistogram) Sample() Sample { return NilSample{} }
+
+// Snapshot is a no-op.
+func (NilHistogram) Snapshot() Histogram { return NilHistogram{} }
+
+// StdDev is a no-op.
+func (NilHistogram) StdDev() float64 { return 0.0 }
+
+// Sum is a no-op.
+func (NilHistogram) Sum() int64 { return 0 }
+
+// Update is a no-op.
+func (NilHistogram) Update(v int64) {}
+
+// Variance is a no-op.
+func (NilHistogram) Variance() float64 { return 0.0 }
+
+// StandardHistogram is the standard implementation of a Histogram and uses a
+// Sample to bound its memory use.
+type StandardHistogram struct {
+ sample Sample
+}
+
+// Clear clears the histogram and its sample.
+func (h *StandardHistogram) Clear() { h.sample.Clear() }
+
+// Count returns the number of samples recorded since the histogram was last
+// cleared.
+func (h *StandardHistogram) Count() int64 { return h.sample.Count() }
+
+// Max returns the maximum value in the sample.
+func (h *StandardHistogram) Max() int64 { return h.sample.Max() }
+
+// Mean returns the mean of the values in the sample.
+func (h *StandardHistogram) Mean() float64 { return h.sample.Mean() }
+
+// Min returns the minimum value in the sample.
+func (h *StandardHistogram) Min() int64 { return h.sample.Min() }
+
+// Percentile returns an arbitrary percentile of the values in the sample.
+func (h *StandardHistogram) Percentile(p float64) float64 {
+ return h.sample.Percentile(p)
+}
+
+// Percentiles returns a slice of arbitrary percentiles of the values in the
+// sample.
+func (h *StandardHistogram) Percentiles(ps []float64) []float64 {
+ return h.sample.Percentiles(ps)
+}
+
+// Sample returns the Sample underlying the histogram.
+func (h *StandardHistogram) Sample() Sample { return h.sample }
+
+// Snapshot returns a read-only copy of the histogram.
+func (h *StandardHistogram) Snapshot() Histogram {
+ return &HistogramSnapshot{sample: h.sample.Snapshot().(*SampleSnapshot)}
+}
+
+// StdDev returns the standard deviation of the values in the sample.
+func (h *StandardHistogram) StdDev() float64 { return h.sample.StdDev() }
+
+// Sum returns the sum in the sample.
+func (h *StandardHistogram) Sum() int64 { return h.sample.Sum() }
+
+// Update samples a new value.
+func (h *StandardHistogram) Update(v int64) { h.sample.Update(v) }
+
+// Variance returns the variance of the values in the sample.
+func (h *StandardHistogram) Variance() float64 { return h.sample.Variance() }
diff --git a/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/json.go b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/json.go
new file mode 100644
index 00000000..174b9477
--- /dev/null
+++ b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/json.go
@@ -0,0 +1,31 @@
+package metrics
+
+import (
+ "encoding/json"
+ "io"
+ "time"
+)
+
+// MarshalJSON returns a byte slice containing a JSON representation of all
+// the metrics in the Registry.
+func (r *StandardRegistry) MarshalJSON() ([]byte, error) {
+ return json.Marshal(r.GetAll())
+}
+
+// WriteJSON writes metrics from the given registry periodically to the
+// specified io.Writer as JSON.
+func WriteJSON(r Registry, d time.Duration, w io.Writer) {
+ for _ = range time.Tick(d) {
+ WriteJSONOnce(r, w)
+ }
+}
+
+// WriteJSONOnce writes metrics from the given registry to the specified
+// io.Writer as JSON.
+func WriteJSONOnce(r Registry, w io.Writer) {
+ json.NewEncoder(w).Encode(r)
+}
+
+func (p *PrefixedRegistry) MarshalJSON() ([]byte, error) {
+ return json.Marshal(p.GetAll())
+}
diff --git a/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/log.go b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/log.go
new file mode 100644
index 00000000..f8074c04
--- /dev/null
+++ b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/log.go
@@ -0,0 +1,80 @@
+package metrics
+
+import (
+ "time"
+)
+
+type Logger interface {
+ Printf(format string, v ...interface{})
+}
+
+func Log(r Registry, freq time.Duration, l Logger) {
+ LogScaled(r, freq, time.Nanosecond, l)
+}
+
+// Output each metric in the given registry periodically using the given
+// logger. Print timings in `scale` units (eg time.Millisecond) rather than nanos.
+func LogScaled(r Registry, freq time.Duration, scale time.Duration, l Logger) {
+ du := float64(scale)
+ duSuffix := scale.String()[1:]
+
+ for _ = range time.Tick(freq) {
+ r.Each(func(name string, i interface{}) {
+ switch metric := i.(type) {
+ case Counter:
+ l.Printf("counter %s\n", name)
+ l.Printf(" count: %9d\n", metric.Count())
+ case Gauge:
+ l.Printf("gauge %s\n", name)
+ l.Printf(" value: %9d\n", metric.Value())
+ case GaugeFloat64:
+ l.Printf("gauge %s\n", name)
+ l.Printf(" value: %f\n", metric.Value())
+ case Healthcheck:
+ metric.Check()
+ l.Printf("healthcheck %s\n", name)
+ l.Printf(" error: %v\n", metric.Error())
+ case Histogram:
+ h := metric.Snapshot()
+ ps := h.Percentiles([]float64{0.5, 0.75, 0.95, 0.99, 0.999})
+ l.Printf("histogram %s\n", name)
+ l.Printf(" count: %9d\n", h.Count())
+ l.Printf(" min: %9d\n", h.Min())
+ l.Printf(" max: %9d\n", h.Max())
+ l.Printf(" mean: %12.2f\n", h.Mean())
+ l.Printf(" stddev: %12.2f\n", h.StdDev())
+ l.Printf(" median: %12.2f\n", ps[0])
+ l.Printf(" 75%%: %12.2f\n", ps[1])
+ l.Printf(" 95%%: %12.2f\n", ps[2])
+ l.Printf(" 99%%: %12.2f\n", ps[3])
+ l.Printf(" 99.9%%: %12.2f\n", ps[4])
+ case Meter:
+ m := metric.Snapshot()
+ l.Printf("meter %s\n", name)
+ l.Printf(" count: %9d\n", m.Count())
+ l.Printf(" 1-min rate: %12.2f\n", m.Rate1())
+ l.Printf(" 5-min rate: %12.2f\n", m.Rate5())
+ l.Printf(" 15-min rate: %12.2f\n", m.Rate15())
+ l.Printf(" mean rate: %12.2f\n", m.RateMean())
+ case Timer:
+ t := metric.Snapshot()
+ ps := t.Percentiles([]float64{0.5, 0.75, 0.95, 0.99, 0.999})
+ l.Printf("timer %s\n", name)
+ l.Printf(" count: %9d\n", t.Count())
+ l.Printf(" min: %12.2f%s\n", float64(t.Min())/du, duSuffix)
+ l.Printf(" max: %12.2f%s\n", float64(t.Max())/du, duSuffix)
+ l.Printf(" mean: %12.2f%s\n", t.Mean()/du, duSuffix)
+ l.Printf(" stddev: %12.2f%s\n", t.StdDev()/du, duSuffix)
+ l.Printf(" median: %12.2f%s\n", ps[0]/du, duSuffix)
+ l.Printf(" 75%%: %12.2f%s\n", ps[1]/du, duSuffix)
+ l.Printf(" 95%%: %12.2f%s\n", ps[2]/du, duSuffix)
+ l.Printf(" 99%%: %12.2f%s\n", ps[3]/du, duSuffix)
+ l.Printf(" 99.9%%: %12.2f%s\n", ps[4]/du, duSuffix)
+ l.Printf(" 1-min rate: %12.2f\n", t.Rate1())
+ l.Printf(" 5-min rate: %12.2f\n", t.Rate5())
+ l.Printf(" 15-min rate: %12.2f\n", t.Rate15())
+ l.Printf(" mean rate: %12.2f\n", t.RateMean())
+ }
+ })
+ }
+}
diff --git a/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/memory.md b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/memory.md
new file mode 100644
index 00000000..47454f54
--- /dev/null
+++ b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/memory.md
@@ -0,0 +1,285 @@
+Memory usage
+============
+
+(Highly unscientific.)
+
+Command used to gather static memory usage:
+
+```sh
+grep ^Vm "/proc/$(ps fax | grep [m]etrics-bench | awk '{print $1}')/status"
+```
+
+Program used to gather baseline memory usage:
+
+```go
+package main
+
+import "time"
+
+func main() {
+ time.Sleep(600e9)
+}
+```
+
+Baseline
+--------
+
+```
+VmPeak: 42604 kB
+VmSize: 42604 kB
+VmLck: 0 kB
+VmHWM: 1120 kB
+VmRSS: 1120 kB
+VmData: 35460 kB
+VmStk: 136 kB
+VmExe: 1020 kB
+VmLib: 1848 kB
+VmPTE: 36 kB
+VmSwap: 0 kB
+```
+
+Program used to gather metric memory usage (with other metrics being similar):
+
+```go
+package main
+
+import (
+ "fmt"
+ "metrics"
+ "time"
+)
+
+func main() {
+ fmt.Sprintf("foo")
+ metrics.NewRegistry()
+ time.Sleep(600e9)
+}
+```
+
+1000 counters registered
+------------------------
+
+```
+VmPeak: 44016 kB
+VmSize: 44016 kB
+VmLck: 0 kB
+VmHWM: 1928 kB
+VmRSS: 1928 kB
+VmData: 36868 kB
+VmStk: 136 kB
+VmExe: 1024 kB
+VmLib: 1848 kB
+VmPTE: 40 kB
+VmSwap: 0 kB
+```
+
+**1.412 kB virtual, TODO 0.808 kB resident per counter.**
+
+100000 counters registered
+--------------------------
+
+```
+VmPeak: 55024 kB
+VmSize: 55024 kB
+VmLck: 0 kB
+VmHWM: 12440 kB
+VmRSS: 12440 kB
+VmData: 47876 kB
+VmStk: 136 kB
+VmExe: 1024 kB
+VmLib: 1848 kB
+VmPTE: 64 kB
+VmSwap: 0 kB
+```
+
+**0.1242 kB virtual, 0.1132 kB resident per counter.**
+
+1000 gauges registered
+----------------------
+
+```
+VmPeak: 44012 kB
+VmSize: 44012 kB
+VmLck: 0 kB
+VmHWM: 1928 kB
+VmRSS: 1928 kB
+VmData: 36868 kB
+VmStk: 136 kB
+VmExe: 1020 kB
+VmLib: 1848 kB
+VmPTE: 40 kB
+VmSwap: 0 kB
+```
+
+**1.408 kB virtual, 0.808 kB resident per counter.**
+
+100000 gauges registered
+------------------------
+
+```
+VmPeak: 55020 kB
+VmSize: 55020 kB
+VmLck: 0 kB
+VmHWM: 12432 kB
+VmRSS: 12432 kB
+VmData: 47876 kB
+VmStk: 136 kB
+VmExe: 1020 kB
+VmLib: 1848 kB
+VmPTE: 60 kB
+VmSwap: 0 kB
+```
+
+**0.12416 kB virtual, 0.11312 resident per gauge.**
+
+1000 histograms with a uniform sample size of 1028
+--------------------------------------------------
+
+```
+VmPeak: 72272 kB
+VmSize: 72272 kB
+VmLck: 0 kB
+VmHWM: 16204 kB
+VmRSS: 16204 kB
+VmData: 65100 kB
+VmStk: 136 kB
+VmExe: 1048 kB
+VmLib: 1848 kB
+VmPTE: 80 kB
+VmSwap: 0 kB
+```
+
+**29.668 kB virtual, TODO 15.084 resident per histogram.**
+
+10000 histograms with a uniform sample size of 1028
+---------------------------------------------------
+
+```
+VmPeak: 256912 kB
+VmSize: 256912 kB
+VmLck: 0 kB
+VmHWM: 146204 kB
+VmRSS: 146204 kB
+VmData: 249740 kB
+VmStk: 136 kB
+VmExe: 1048 kB
+VmLib: 1848 kB
+VmPTE: 448 kB
+VmSwap: 0 kB
+```
+
+**21.4308 kB virtual, 14.5084 kB resident per histogram.**
+
+50000 histograms with a uniform sample size of 1028
+---------------------------------------------------
+
+```
+VmPeak: 908112 kB
+VmSize: 908112 kB
+VmLck: 0 kB
+VmHWM: 645832 kB
+VmRSS: 645588 kB
+VmData: 900940 kB
+VmStk: 136 kB
+VmExe: 1048 kB
+VmLib: 1848 kB
+VmPTE: 1716 kB
+VmSwap: 1544 kB
+```
+
+**17.31016 kB virtual, 12.88936 kB resident per histogram.**
+
+1000 histograms with an exponentially-decaying sample size of 1028 and alpha of 0.015
+-------------------------------------------------------------------------------------
+
+```
+VmPeak: 62480 kB
+VmSize: 62480 kB
+VmLck: 0 kB
+VmHWM: 11572 kB
+VmRSS: 11572 kB
+VmData: 55308 kB
+VmStk: 136 kB
+VmExe: 1048 kB
+VmLib: 1848 kB
+VmPTE: 64 kB
+VmSwap: 0 kB
+```
+
+**19.876 kB virtual, 10.452 kB resident per histogram.**
+
+10000 histograms with an exponentially-decaying sample size of 1028 and alpha of 0.015
+--------------------------------------------------------------------------------------
+
+```
+VmPeak: 153296 kB
+VmSize: 153296 kB
+VmLck: 0 kB
+VmHWM: 101176 kB
+VmRSS: 101176 kB
+VmData: 146124 kB
+VmStk: 136 kB
+VmExe: 1048 kB
+VmLib: 1848 kB
+VmPTE: 240 kB
+VmSwap: 0 kB
+```
+
+**11.0692 kB virtual, 10.0056 kB resident per histogram.**
+
+50000 histograms with an exponentially-decaying sample size of 1028 and alpha of 0.015
+--------------------------------------------------------------------------------------
+
+```
+VmPeak: 557264 kB
+VmSize: 557264 kB
+VmLck: 0 kB
+VmHWM: 501056 kB
+VmRSS: 501056 kB
+VmData: 550092 kB
+VmStk: 136 kB
+VmExe: 1048 kB
+VmLib: 1848 kB
+VmPTE: 1032 kB
+VmSwap: 0 kB
+```
+
+**10.2932 kB virtual, 9.99872 kB resident per histogram.**
+
+1000 meters
+-----------
+
+```
+VmPeak: 74504 kB
+VmSize: 74504 kB
+VmLck: 0 kB
+VmHWM: 24124 kB
+VmRSS: 24124 kB
+VmData: 67340 kB
+VmStk: 136 kB
+VmExe: 1040 kB
+VmLib: 1848 kB
+VmPTE: 92 kB
+VmSwap: 0 kB
+```
+
+**31.9 kB virtual, 23.004 kB resident per meter.**
+
+10000 meters
+------------
+
+```
+VmPeak: 278920 kB
+VmSize: 278920 kB
+VmLck: 0 kB
+VmHWM: 227300 kB
+VmRSS: 227300 kB
+VmData: 271756 kB
+VmStk: 136 kB
+VmExe: 1040 kB
+VmLib: 1848 kB
+VmPTE: 488 kB
+VmSwap: 0 kB
+```
+
+**23.6316 kB virtual, 22.618 kB resident per meter.**
diff --git a/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/meter.go b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/meter.go
new file mode 100644
index 00000000..223669bc
--- /dev/null
+++ b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/meter.go
@@ -0,0 +1,251 @@
+package metrics
+
+import (
+ "math"
+ "sync"
+ "sync/atomic"
+ "time"
+)
+
+// Meters count events to produce exponentially-weighted moving average rates
+// at one-, five-, and fifteen-minutes and a mean rate.
+type Meter interface {
+ Count() int64
+ Mark(int64)
+ Rate1() float64
+ Rate5() float64
+ Rate15() float64
+ RateMean() float64
+ Snapshot() Meter
+ Stop()
+}
+
+// GetOrRegisterMeter returns an existing Meter or constructs and registers a
+// new StandardMeter.
+// Be sure to unregister the meter from the registry once it is of no use to
+// allow for garbage collection.
+func GetOrRegisterMeter(name string, r Registry) Meter {
+ if nil == r {
+ r = DefaultRegistry
+ }
+ return r.GetOrRegister(name, NewMeter).(Meter)
+}
+
+// NewMeter constructs a new StandardMeter and launches a goroutine.
+// Be sure to call Stop() once the meter is of no use to allow for garbage collection.
+func NewMeter() Meter {
+ if UseNilMetrics {
+ return NilMeter{}
+ }
+ m := newStandardMeter()
+ arbiter.Lock()
+ defer arbiter.Unlock()
+ arbiter.meters[m] = struct{}{}
+ if !arbiter.started {
+ arbiter.started = true
+ go arbiter.tick()
+ }
+ return m
+}
+
+// NewMeter constructs and registers a new StandardMeter and launches a
+// goroutine.
+// Be sure to unregister the meter from the registry once it is of no use to
+// allow for garbage collection.
+func NewRegisteredMeter(name string, r Registry) Meter {
+ c := NewMeter()
+ if nil == r {
+ r = DefaultRegistry
+ }
+ r.Register(name, c)
+ return c
+}
+
+// MeterSnapshot is a read-only copy of another Meter.
+type MeterSnapshot struct {
+ count int64
+ rate1, rate5, rate15, rateMean uint64
+}
+
+// Count returns the count of events at the time the snapshot was taken.
+func (m *MeterSnapshot) Count() int64 { return m.count }
+
+// Mark panics.
+func (*MeterSnapshot) Mark(n int64) {
+ panic("Mark called on a MeterSnapshot")
+}
+
+// Rate1 returns the one-minute moving average rate of events per second at the
+// time the snapshot was taken.
+func (m *MeterSnapshot) Rate1() float64 { return math.Float64frombits(m.rate1) }
+
+// Rate5 returns the five-minute moving average rate of events per second at
+// the time the snapshot was taken.
+func (m *MeterSnapshot) Rate5() float64 { return math.Float64frombits(m.rate5) }
+
+// Rate15 returns the fifteen-minute moving average rate of events per second
+// at the time the snapshot was taken.
+func (m *MeterSnapshot) Rate15() float64 { return math.Float64frombits(m.rate15) }
+
+// RateMean returns the meter's mean rate of events per second at the time the
+// snapshot was taken.
+func (m *MeterSnapshot) RateMean() float64 { return math.Float64frombits(m.rateMean) }
+
+// Snapshot returns the snapshot.
+func (m *MeterSnapshot) Snapshot() Meter { return m }
+
+// Stop is a no-op.
+func (m *MeterSnapshot) Stop() {}
+
+// NilMeter is a no-op Meter.
+type NilMeter struct{}
+
+// Count is a no-op.
+func (NilMeter) Count() int64 { return 0 }
+
+// Mark is a no-op.
+func (NilMeter) Mark(n int64) {}
+
+// Rate1 is a no-op.
+func (NilMeter) Rate1() float64 { return 0.0 }
+
+// Rate5 is a no-op.
+func (NilMeter) Rate5() float64 { return 0.0 }
+
+// Rate15is a no-op.
+func (NilMeter) Rate15() float64 { return 0.0 }
+
+// RateMean is a no-op.
+func (NilMeter) RateMean() float64 { return 0.0 }
+
+// Snapshot is a no-op.
+func (NilMeter) Snapshot() Meter { return NilMeter{} }
+
+// Stop is a no-op.
+func (NilMeter) Stop() {}
+
+// StandardMeter is the standard implementation of a Meter.
+type StandardMeter struct {
+ snapshot *MeterSnapshot
+ a1, a5, a15 EWMA
+ startTime time.Time
+ stopped uint32
+}
+
+func newStandardMeter() *StandardMeter {
+ return &StandardMeter{
+ snapshot: &MeterSnapshot{},
+ a1: NewEWMA1(),
+ a5: NewEWMA5(),
+ a15: NewEWMA15(),
+ startTime: time.Now(),
+ }
+}
+
+// Stop stops the meter, Mark() will be a no-op if you use it after being stopped.
+func (m *StandardMeter) Stop() {
+ if atomic.CompareAndSwapUint32(&m.stopped, 0, 1) {
+ arbiter.Lock()
+ delete(arbiter.meters, m)
+ arbiter.Unlock()
+ }
+}
+
+// Count returns the number of events recorded.
+func (m *StandardMeter) Count() int64 {
+ return atomic.LoadInt64(&m.snapshot.count)
+}
+
+// Mark records the occurance of n events.
+func (m *StandardMeter) Mark(n int64) {
+ if atomic.LoadUint32(&m.stopped) == 1 {
+ return
+ }
+
+ atomic.AddInt64(&m.snapshot.count, n)
+
+ m.a1.Update(n)
+ m.a5.Update(n)
+ m.a15.Update(n)
+ m.updateSnapshot()
+}
+
+// Rate1 returns the one-minute moving average rate of events per second.
+func (m *StandardMeter) Rate1() float64 {
+ return math.Float64frombits(atomic.LoadUint64(&m.snapshot.rate1))
+}
+
+// Rate5 returns the five-minute moving average rate of events per second.
+func (m *StandardMeter) Rate5() float64 {
+ return math.Float64frombits(atomic.LoadUint64(&m.snapshot.rate5))
+}
+
+// Rate15 returns the fifteen-minute moving average rate of events per second.
+func (m *StandardMeter) Rate15() float64 {
+ return math.Float64frombits(atomic.LoadUint64(&m.snapshot.rate15))
+}
+
+// RateMean returns the meter's mean rate of events per second.
+func (m *StandardMeter) RateMean() float64 {
+ return math.Float64frombits(atomic.LoadUint64(&m.snapshot.rateMean))
+}
+
+// Snapshot returns a read-only copy of the meter.
+func (m *StandardMeter) Snapshot() Meter {
+ copiedSnapshot := MeterSnapshot{
+ count: atomic.LoadInt64(&m.snapshot.count),
+ rate1: atomic.LoadUint64(&m.snapshot.rate1),
+ rate5: atomic.LoadUint64(&m.snapshot.rate5),
+ rate15: atomic.LoadUint64(&m.snapshot.rate15),
+ rateMean: atomic.LoadUint64(&m.snapshot.rateMean),
+ }
+ return &copiedSnapshot
+}
+
+func (m *StandardMeter) updateSnapshot() {
+ rate1 := math.Float64bits(m.a1.Rate())
+ rate5 := math.Float64bits(m.a5.Rate())
+ rate15 := math.Float64bits(m.a15.Rate())
+ rateMean := math.Float64bits(float64(m.Count()) / time.Since(m.startTime).Seconds())
+
+ atomic.StoreUint64(&m.snapshot.rate1, rate1)
+ atomic.StoreUint64(&m.snapshot.rate5, rate5)
+ atomic.StoreUint64(&m.snapshot.rate15, rate15)
+ atomic.StoreUint64(&m.snapshot.rateMean, rateMean)
+}
+
+func (m *StandardMeter) tick() {
+ m.a1.Tick()
+ m.a5.Tick()
+ m.a15.Tick()
+ m.updateSnapshot()
+}
+
+// meterArbiter ticks meters every 5s from a single goroutine.
+// meters are references in a set for future stopping.
+type meterArbiter struct {
+ sync.RWMutex
+ started bool
+ meters map[*StandardMeter]struct{}
+ ticker *time.Ticker
+}
+
+var arbiter = meterArbiter{ticker: time.NewTicker(5e9), meters: make(map[*StandardMeter]struct{})}
+
+// Ticks meters on the scheduled interval
+func (ma *meterArbiter) tick() {
+ for {
+ select {
+ case <-ma.ticker.C:
+ ma.tickMeters()
+ }
+ }
+}
+
+func (ma *meterArbiter) tickMeters() {
+ ma.RLock()
+ defer ma.RUnlock()
+ for meter := range ma.meters {
+ meter.tick()
+ }
+}
diff --git a/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/metrics.go b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/metrics.go
new file mode 100644
index 00000000..b97a49ed
--- /dev/null
+++ b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/metrics.go
@@ -0,0 +1,13 @@
+// Go port of Coda Hale's Metrics library
+//
+//
+//
+// Coda Hale's original work:
+package metrics
+
+// UseNilMetrics is checked by the constructor functions for all of the
+// standard metrics. If it is true, the metric returned is a stub.
+//
+// This global kill-switch helps quantify the observer effect and makes
+// for less cluttered pprof profiles.
+var UseNilMetrics bool = false
diff --git a/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/opentsdb.go b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/opentsdb.go
new file mode 100644
index 00000000..266b6c93
--- /dev/null
+++ b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/opentsdb.go
@@ -0,0 +1,119 @@
+package metrics
+
+import (
+ "bufio"
+ "fmt"
+ "log"
+ "net"
+ "os"
+ "strings"
+ "time"
+)
+
+var shortHostName string = ""
+
+// OpenTSDBConfig provides a container with configuration parameters for
+// the OpenTSDB exporter
+type OpenTSDBConfig struct {
+ Addr *net.TCPAddr // Network address to connect to
+ Registry Registry // Registry to be exported
+ FlushInterval time.Duration // Flush interval
+ DurationUnit time.Duration // Time conversion unit for durations
+ Prefix string // Prefix to be prepended to metric names
+}
+
+// OpenTSDB is a blocking exporter function which reports metrics in r
+// to a TSDB server located at addr, flushing them every d duration
+// and prepending metric names with prefix.
+func OpenTSDB(r Registry, d time.Duration, prefix string, addr *net.TCPAddr) {
+ OpenTSDBWithConfig(OpenTSDBConfig{
+ Addr: addr,
+ Registry: r,
+ FlushInterval: d,
+ DurationUnit: time.Nanosecond,
+ Prefix: prefix,
+ })
+}
+
+// OpenTSDBWithConfig is a blocking exporter function just like OpenTSDB,
+// but it takes a OpenTSDBConfig instead.
+func OpenTSDBWithConfig(c OpenTSDBConfig) {
+ for _ = range time.Tick(c.FlushInterval) {
+ if err := openTSDB(&c); nil != err {
+ log.Println(err)
+ }
+ }
+}
+
+func getShortHostname() string {
+ if shortHostName == "" {
+ host, _ := os.Hostname()
+ if index := strings.Index(host, "."); index > 0 {
+ shortHostName = host[:index]
+ } else {
+ shortHostName = host
+ }
+ }
+ return shortHostName
+}
+
+func openTSDB(c *OpenTSDBConfig) error {
+ shortHostname := getShortHostname()
+ now := time.Now().Unix()
+ du := float64(c.DurationUnit)
+ conn, err := net.DialTCP("tcp", nil, c.Addr)
+ if nil != err {
+ return err
+ }
+ defer conn.Close()
+ w := bufio.NewWriter(conn)
+ c.Registry.Each(func(name string, i interface{}) {
+ switch metric := i.(type) {
+ case Counter:
+ fmt.Fprintf(w, "put %s.%s.count %d %d host=%s\n", c.Prefix, name, now, metric.Count(), shortHostname)
+ case Gauge:
+ fmt.Fprintf(w, "put %s.%s.value %d %d host=%s\n", c.Prefix, name, now, metric.Value(), shortHostname)
+ case GaugeFloat64:
+ fmt.Fprintf(w, "put %s.%s.value %d %f host=%s\n", c.Prefix, name, now, metric.Value(), shortHostname)
+ case Histogram:
+ h := metric.Snapshot()
+ ps := h.Percentiles([]float64{0.5, 0.75, 0.95, 0.99, 0.999})
+ fmt.Fprintf(w, "put %s.%s.count %d %d host=%s\n", c.Prefix, name, now, h.Count(), shortHostname)
+ fmt.Fprintf(w, "put %s.%s.min %d %d host=%s\n", c.Prefix, name, now, h.Min(), shortHostname)
+ fmt.Fprintf(w, "put %s.%s.max %d %d host=%s\n", c.Prefix, name, now, h.Max(), shortHostname)
+ fmt.Fprintf(w, "put %s.%s.mean %d %.2f host=%s\n", c.Prefix, name, now, h.Mean(), shortHostname)
+ fmt.Fprintf(w, "put %s.%s.std-dev %d %.2f host=%s\n", c.Prefix, name, now, h.StdDev(), shortHostname)
+ fmt.Fprintf(w, "put %s.%s.50-percentile %d %.2f host=%s\n", c.Prefix, name, now, ps[0], shortHostname)
+ fmt.Fprintf(w, "put %s.%s.75-percentile %d %.2f host=%s\n", c.Prefix, name, now, ps[1], shortHostname)
+ fmt.Fprintf(w, "put %s.%s.95-percentile %d %.2f host=%s\n", c.Prefix, name, now, ps[2], shortHostname)
+ fmt.Fprintf(w, "put %s.%s.99-percentile %d %.2f host=%s\n", c.Prefix, name, now, ps[3], shortHostname)
+ fmt.Fprintf(w, "put %s.%s.999-percentile %d %.2f host=%s\n", c.Prefix, name, now, ps[4], shortHostname)
+ case Meter:
+ m := metric.Snapshot()
+ fmt.Fprintf(w, "put %s.%s.count %d %d host=%s\n", c.Prefix, name, now, m.Count(), shortHostname)
+ fmt.Fprintf(w, "put %s.%s.one-minute %d %.2f host=%s\n", c.Prefix, name, now, m.Rate1(), shortHostname)
+ fmt.Fprintf(w, "put %s.%s.five-minute %d %.2f host=%s\n", c.Prefix, name, now, m.Rate5(), shortHostname)
+ fmt.Fprintf(w, "put %s.%s.fifteen-minute %d %.2f host=%s\n", c.Prefix, name, now, m.Rate15(), shortHostname)
+ fmt.Fprintf(w, "put %s.%s.mean %d %.2f host=%s\n", c.Prefix, name, now, m.RateMean(), shortHostname)
+ case Timer:
+ t := metric.Snapshot()
+ ps := t.Percentiles([]float64{0.5, 0.75, 0.95, 0.99, 0.999})
+ fmt.Fprintf(w, "put %s.%s.count %d %d host=%s\n", c.Prefix, name, now, t.Count(), shortHostname)
+ fmt.Fprintf(w, "put %s.%s.min %d %d host=%s\n", c.Prefix, name, now, t.Min()/int64(du), shortHostname)
+ fmt.Fprintf(w, "put %s.%s.max %d %d host=%s\n", c.Prefix, name, now, t.Max()/int64(du), shortHostname)
+ fmt.Fprintf(w, "put %s.%s.mean %d %.2f host=%s\n", c.Prefix, name, now, t.Mean()/du, shortHostname)
+ fmt.Fprintf(w, "put %s.%s.std-dev %d %.2f host=%s\n", c.Prefix, name, now, t.StdDev()/du, shortHostname)
+ fmt.Fprintf(w, "put %s.%s.50-percentile %d %.2f host=%s\n", c.Prefix, name, now, ps[0]/du, shortHostname)
+ fmt.Fprintf(w, "put %s.%s.75-percentile %d %.2f host=%s\n", c.Prefix, name, now, ps[1]/du, shortHostname)
+ fmt.Fprintf(w, "put %s.%s.95-percentile %d %.2f host=%s\n", c.Prefix, name, now, ps[2]/du, shortHostname)
+ fmt.Fprintf(w, "put %s.%s.99-percentile %d %.2f host=%s\n", c.Prefix, name, now, ps[3]/du, shortHostname)
+ fmt.Fprintf(w, "put %s.%s.999-percentile %d %.2f host=%s\n", c.Prefix, name, now, ps[4]/du, shortHostname)
+ fmt.Fprintf(w, "put %s.%s.one-minute %d %.2f host=%s\n", c.Prefix, name, now, t.Rate1(), shortHostname)
+ fmt.Fprintf(w, "put %s.%s.five-minute %d %.2f host=%s\n", c.Prefix, name, now, t.Rate5(), shortHostname)
+ fmt.Fprintf(w, "put %s.%s.fifteen-minute %d %.2f host=%s\n", c.Prefix, name, now, t.Rate15(), shortHostname)
+ fmt.Fprintf(w, "put %s.%s.mean-rate %d %.2f host=%s\n", c.Prefix, name, now, t.RateMean(), shortHostname)
+ }
+ w.Flush()
+ })
+ return nil
+}
diff --git a/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/registry.go b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/registry.go
new file mode 100644
index 00000000..b3bab64e
--- /dev/null
+++ b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/registry.go
@@ -0,0 +1,363 @@
+package metrics
+
+import (
+ "fmt"
+ "reflect"
+ "strings"
+ "sync"
+)
+
+// DuplicateMetric is the error returned by Registry.Register when a metric
+// already exists. If you mean to Register that metric you must first
+// Unregister the existing metric.
+type DuplicateMetric string
+
+func (err DuplicateMetric) Error() string {
+ return fmt.Sprintf("duplicate metric: %s", string(err))
+}
+
+// A Registry holds references to a set of metrics by name and can iterate
+// over them, calling callback functions provided by the user.
+//
+// This is an interface so as to encourage other structs to implement
+// the Registry API as appropriate.
+type Registry interface {
+
+ // Call the given function for each registered metric.
+ Each(func(string, interface{}))
+
+ // Get the metric by the given name or nil if none is registered.
+ Get(string) interface{}
+
+ // GetAll metrics in the Registry.
+ GetAll() map[string]map[string]interface{}
+
+ // Gets an existing metric or registers the given one.
+ // The interface can be the metric to register if not found in registry,
+ // or a function returning the metric for lazy instantiation.
+ GetOrRegister(string, interface{}) interface{}
+
+ // Register the given metric under the given name.
+ Register(string, interface{}) error
+
+ // Run all registered healthchecks.
+ RunHealthchecks()
+
+ // Unregister the metric with the given name.
+ Unregister(string)
+
+ // Unregister all metrics. (Mostly for testing.)
+ UnregisterAll()
+}
+
+// The standard implementation of a Registry is a mutex-protected map
+// of names to metrics.
+type StandardRegistry struct {
+ metrics map[string]interface{}
+ mutex sync.RWMutex
+}
+
+// Create a new registry.
+func NewRegistry() Registry {
+ return &StandardRegistry{metrics: make(map[string]interface{})}
+}
+
+// Call the given function for each registered metric.
+func (r *StandardRegistry) Each(f func(string, interface{})) {
+ for name, i := range r.registered() {
+ f(name, i)
+ }
+}
+
+// Get the metric by the given name or nil if none is registered.
+func (r *StandardRegistry) Get(name string) interface{} {
+ r.mutex.RLock()
+ defer r.mutex.RUnlock()
+ return r.metrics[name]
+}
+
+// Gets an existing metric or creates and registers a new one. Threadsafe
+// alternative to calling Get and Register on failure.
+// The interface can be the metric to register if not found in registry,
+// or a function returning the metric for lazy instantiation.
+func (r *StandardRegistry) GetOrRegister(name string, i interface{}) interface{} {
+ // access the read lock first which should be re-entrant
+ r.mutex.RLock()
+ metric, ok := r.metrics[name]
+ r.mutex.RUnlock()
+ if ok {
+ return metric
+ }
+
+ // only take the write lock if we'll be modifying the metrics map
+ r.mutex.Lock()
+ defer r.mutex.Unlock()
+ if metric, ok := r.metrics[name]; ok {
+ return metric
+ }
+ if v := reflect.ValueOf(i); v.Kind() == reflect.Func {
+ i = v.Call(nil)[0].Interface()
+ }
+ r.register(name, i)
+ return i
+}
+
+// Register the given metric under the given name. Returns a DuplicateMetric
+// if a metric by the given name is already registered.
+func (r *StandardRegistry) Register(name string, i interface{}) error {
+ r.mutex.Lock()
+ defer r.mutex.Unlock()
+ return r.register(name, i)
+}
+
+// Run all registered healthchecks.
+func (r *StandardRegistry) RunHealthchecks() {
+ r.mutex.RLock()
+ defer r.mutex.RUnlock()
+ for _, i := range r.metrics {
+ if h, ok := i.(Healthcheck); ok {
+ h.Check()
+ }
+ }
+}
+
+// GetAll metrics in the Registry
+func (r *StandardRegistry) GetAll() map[string]map[string]interface{} {
+ data := make(map[string]map[string]interface{})
+ r.Each(func(name string, i interface{}) {
+ values := make(map[string]interface{})
+ switch metric := i.(type) {
+ case Counter:
+ values["count"] = metric.Count()
+ case Gauge:
+ values["value"] = metric.Value()
+ case GaugeFloat64:
+ values["value"] = metric.Value()
+ case Healthcheck:
+ values["error"] = nil
+ metric.Check()
+ if err := metric.Error(); nil != err {
+ values["error"] = metric.Error().Error()
+ }
+ case Histogram:
+ h := metric.Snapshot()
+ ps := h.Percentiles([]float64{0.5, 0.75, 0.95, 0.99, 0.999})
+ values["count"] = h.Count()
+ values["min"] = h.Min()
+ values["max"] = h.Max()
+ values["mean"] = h.Mean()
+ values["stddev"] = h.StdDev()
+ values["median"] = ps[0]
+ values["75%"] = ps[1]
+ values["95%"] = ps[2]
+ values["99%"] = ps[3]
+ values["99.9%"] = ps[4]
+ case Meter:
+ m := metric.Snapshot()
+ values["count"] = m.Count()
+ values["1m.rate"] = m.Rate1()
+ values["5m.rate"] = m.Rate5()
+ values["15m.rate"] = m.Rate15()
+ values["mean.rate"] = m.RateMean()
+ case Timer:
+ t := metric.Snapshot()
+ ps := t.Percentiles([]float64{0.5, 0.75, 0.95, 0.99, 0.999})
+ values["count"] = t.Count()
+ values["min"] = t.Min()
+ values["max"] = t.Max()
+ values["mean"] = t.Mean()
+ values["stddev"] = t.StdDev()
+ values["median"] = ps[0]
+ values["75%"] = ps[1]
+ values["95%"] = ps[2]
+ values["99%"] = ps[3]
+ values["99.9%"] = ps[4]
+ values["1m.rate"] = t.Rate1()
+ values["5m.rate"] = t.Rate5()
+ values["15m.rate"] = t.Rate15()
+ values["mean.rate"] = t.RateMean()
+ }
+ data[name] = values
+ })
+ return data
+}
+
+// Unregister the metric with the given name.
+func (r *StandardRegistry) Unregister(name string) {
+ r.mutex.Lock()
+ defer r.mutex.Unlock()
+ r.stop(name)
+ delete(r.metrics, name)
+}
+
+// Unregister all metrics. (Mostly for testing.)
+func (r *StandardRegistry) UnregisterAll() {
+ r.mutex.Lock()
+ defer r.mutex.Unlock()
+ for name, _ := range r.metrics {
+ r.stop(name)
+ delete(r.metrics, name)
+ }
+}
+
+func (r *StandardRegistry) register(name string, i interface{}) error {
+ if _, ok := r.metrics[name]; ok {
+ return DuplicateMetric(name)
+ }
+ switch i.(type) {
+ case Counter, Gauge, GaugeFloat64, Healthcheck, Histogram, Meter, Timer:
+ r.metrics[name] = i
+ }
+ return nil
+}
+
+func (r *StandardRegistry) registered() map[string]interface{} {
+ r.mutex.Lock()
+ defer r.mutex.Unlock()
+ metrics := make(map[string]interface{}, len(r.metrics))
+ for name, i := range r.metrics {
+ metrics[name] = i
+ }
+ return metrics
+}
+
+func (r *StandardRegistry) stop(name string) {
+ if i, ok := r.metrics[name]; ok {
+ if s, ok := i.(Stoppable); ok {
+ s.Stop()
+ }
+ }
+}
+
+// Stoppable defines the metrics which has to be stopped.
+type Stoppable interface {
+ Stop()
+}
+
+type PrefixedRegistry struct {
+ underlying Registry
+ prefix string
+}
+
+func NewPrefixedRegistry(prefix string) Registry {
+ return &PrefixedRegistry{
+ underlying: NewRegistry(),
+ prefix: prefix,
+ }
+}
+
+func NewPrefixedChildRegistry(parent Registry, prefix string) Registry {
+ return &PrefixedRegistry{
+ underlying: parent,
+ prefix: prefix,
+ }
+}
+
+// Call the given function for each registered metric.
+func (r *PrefixedRegistry) Each(fn func(string, interface{})) {
+ wrappedFn := func(prefix string) func(string, interface{}) {
+ return func(name string, iface interface{}) {
+ if strings.HasPrefix(name, prefix) {
+ fn(name, iface)
+ } else {
+ return
+ }
+ }
+ }
+
+ baseRegistry, prefix := findPrefix(r, "")
+ baseRegistry.Each(wrappedFn(prefix))
+}
+
+func findPrefix(registry Registry, prefix string) (Registry, string) {
+ switch r := registry.(type) {
+ case *PrefixedRegistry:
+ return findPrefix(r.underlying, r.prefix+prefix)
+ case *StandardRegistry:
+ return r, prefix
+ }
+ return nil, ""
+}
+
+// Get the metric by the given name or nil if none is registered.
+func (r *PrefixedRegistry) Get(name string) interface{} {
+ realName := r.prefix + name
+ return r.underlying.Get(realName)
+}
+
+// Gets an existing metric or registers the given one.
+// The interface can be the metric to register if not found in registry,
+// or a function returning the metric for lazy instantiation.
+func (r *PrefixedRegistry) GetOrRegister(name string, metric interface{}) interface{} {
+ realName := r.prefix + name
+ return r.underlying.GetOrRegister(realName, metric)
+}
+
+// Register the given metric under the given name. The name will be prefixed.
+func (r *PrefixedRegistry) Register(name string, metric interface{}) error {
+ realName := r.prefix + name
+ return r.underlying.Register(realName, metric)
+}
+
+// Run all registered healthchecks.
+func (r *PrefixedRegistry) RunHealthchecks() {
+ r.underlying.RunHealthchecks()
+}
+
+// GetAll metrics in the Registry
+func (r *PrefixedRegistry) GetAll() map[string]map[string]interface{} {
+ return r.underlying.GetAll()
+}
+
+// Unregister the metric with the given name. The name will be prefixed.
+func (r *PrefixedRegistry) Unregister(name string) {
+ realName := r.prefix + name
+ r.underlying.Unregister(realName)
+}
+
+// Unregister all metrics. (Mostly for testing.)
+func (r *PrefixedRegistry) UnregisterAll() {
+ r.underlying.UnregisterAll()
+}
+
+var DefaultRegistry Registry = NewRegistry()
+
+// Call the given function for each registered metric.
+func Each(f func(string, interface{})) {
+ DefaultRegistry.Each(f)
+}
+
+// Get the metric by the given name or nil if none is registered.
+func Get(name string) interface{} {
+ return DefaultRegistry.Get(name)
+}
+
+// Gets an existing metric or creates and registers a new one. Threadsafe
+// alternative to calling Get and Register on failure.
+func GetOrRegister(name string, i interface{}) interface{} {
+ return DefaultRegistry.GetOrRegister(name, i)
+}
+
+// Register the given metric under the given name. Returns a DuplicateMetric
+// if a metric by the given name is already registered.
+func Register(name string, i interface{}) error {
+ return DefaultRegistry.Register(name, i)
+}
+
+// Register the given metric under the given name. Panics if a metric by the
+// given name is already registered.
+func MustRegister(name string, i interface{}) {
+ if err := Register(name, i); err != nil {
+ panic(err)
+ }
+}
+
+// Run all registered healthchecks.
+func RunHealthchecks() {
+ DefaultRegistry.RunHealthchecks()
+}
+
+// Unregister the metric with the given name.
+func Unregister(name string) {
+ DefaultRegistry.Unregister(name)
+}
diff --git a/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/runtime.go b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/runtime.go
new file mode 100644
index 00000000..11c6b785
--- /dev/null
+++ b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/runtime.go
@@ -0,0 +1,212 @@
+package metrics
+
+import (
+ "runtime"
+ "runtime/pprof"
+ "time"
+)
+
+var (
+ memStats runtime.MemStats
+ runtimeMetrics struct {
+ MemStats struct {
+ Alloc Gauge
+ BuckHashSys Gauge
+ DebugGC Gauge
+ EnableGC Gauge
+ Frees Gauge
+ HeapAlloc Gauge
+ HeapIdle Gauge
+ HeapInuse Gauge
+ HeapObjects Gauge
+ HeapReleased Gauge
+ HeapSys Gauge
+ LastGC Gauge
+ Lookups Gauge
+ Mallocs Gauge
+ MCacheInuse Gauge
+ MCacheSys Gauge
+ MSpanInuse Gauge
+ MSpanSys Gauge
+ NextGC Gauge
+ NumGC Gauge
+ GCCPUFraction GaugeFloat64
+ PauseNs Histogram
+ PauseTotalNs Gauge
+ StackInuse Gauge
+ StackSys Gauge
+ Sys Gauge
+ TotalAlloc Gauge
+ }
+ NumCgoCall Gauge
+ NumGoroutine Gauge
+ NumThread Gauge
+ ReadMemStats Timer
+ }
+ frees uint64
+ lookups uint64
+ mallocs uint64
+ numGC uint32
+ numCgoCalls int64
+
+ threadCreateProfile = pprof.Lookup("threadcreate")
+)
+
+// Capture new values for the Go runtime statistics exported in
+// runtime.MemStats. This is designed to be called as a goroutine.
+func CaptureRuntimeMemStats(r Registry, d time.Duration) {
+ for _ = range time.Tick(d) {
+ CaptureRuntimeMemStatsOnce(r)
+ }
+}
+
+// Capture new values for the Go runtime statistics exported in
+// runtime.MemStats. This is designed to be called in a background
+// goroutine. Giving a registry which has not been given to
+// RegisterRuntimeMemStats will panic.
+//
+// Be very careful with this because runtime.ReadMemStats calls the C
+// functions runtime·semacquire(&runtime·worldsema) and runtime·stoptheworld()
+// and that last one does what it says on the tin.
+func CaptureRuntimeMemStatsOnce(r Registry) {
+ t := time.Now()
+ runtime.ReadMemStats(&memStats) // This takes 50-200us.
+ runtimeMetrics.ReadMemStats.UpdateSince(t)
+
+ runtimeMetrics.MemStats.Alloc.Update(int64(memStats.Alloc))
+ runtimeMetrics.MemStats.BuckHashSys.Update(int64(memStats.BuckHashSys))
+ if memStats.DebugGC {
+ runtimeMetrics.MemStats.DebugGC.Update(1)
+ } else {
+ runtimeMetrics.MemStats.DebugGC.Update(0)
+ }
+ if memStats.EnableGC {
+ runtimeMetrics.MemStats.EnableGC.Update(1)
+ } else {
+ runtimeMetrics.MemStats.EnableGC.Update(0)
+ }
+
+ runtimeMetrics.MemStats.Frees.Update(int64(memStats.Frees - frees))
+ runtimeMetrics.MemStats.HeapAlloc.Update(int64(memStats.HeapAlloc))
+ runtimeMetrics.MemStats.HeapIdle.Update(int64(memStats.HeapIdle))
+ runtimeMetrics.MemStats.HeapInuse.Update(int64(memStats.HeapInuse))
+ runtimeMetrics.MemStats.HeapObjects.Update(int64(memStats.HeapObjects))
+ runtimeMetrics.MemStats.HeapReleased.Update(int64(memStats.HeapReleased))
+ runtimeMetrics.MemStats.HeapSys.Update(int64(memStats.HeapSys))
+ runtimeMetrics.MemStats.LastGC.Update(int64(memStats.LastGC))
+ runtimeMetrics.MemStats.Lookups.Update(int64(memStats.Lookups - lookups))
+ runtimeMetrics.MemStats.Mallocs.Update(int64(memStats.Mallocs - mallocs))
+ runtimeMetrics.MemStats.MCacheInuse.Update(int64(memStats.MCacheInuse))
+ runtimeMetrics.MemStats.MCacheSys.Update(int64(memStats.MCacheSys))
+ runtimeMetrics.MemStats.MSpanInuse.Update(int64(memStats.MSpanInuse))
+ runtimeMetrics.MemStats.MSpanSys.Update(int64(memStats.MSpanSys))
+ runtimeMetrics.MemStats.NextGC.Update(int64(memStats.NextGC))
+ runtimeMetrics.MemStats.NumGC.Update(int64(memStats.NumGC - numGC))
+ runtimeMetrics.MemStats.GCCPUFraction.Update(gcCPUFraction(&memStats))
+
+ //
+ i := numGC % uint32(len(memStats.PauseNs))
+ ii := memStats.NumGC % uint32(len(memStats.PauseNs))
+ if memStats.NumGC-numGC >= uint32(len(memStats.PauseNs)) {
+ for i = 0; i < uint32(len(memStats.PauseNs)); i++ {
+ runtimeMetrics.MemStats.PauseNs.Update(int64(memStats.PauseNs[i]))
+ }
+ } else {
+ if i > ii {
+ for ; i < uint32(len(memStats.PauseNs)); i++ {
+ runtimeMetrics.MemStats.PauseNs.Update(int64(memStats.PauseNs[i]))
+ }
+ i = 0
+ }
+ for ; i < ii; i++ {
+ runtimeMetrics.MemStats.PauseNs.Update(int64(memStats.PauseNs[i]))
+ }
+ }
+ frees = memStats.Frees
+ lookups = memStats.Lookups
+ mallocs = memStats.Mallocs
+ numGC = memStats.NumGC
+
+ runtimeMetrics.MemStats.PauseTotalNs.Update(int64(memStats.PauseTotalNs))
+ runtimeMetrics.MemStats.StackInuse.Update(int64(memStats.StackInuse))
+ runtimeMetrics.MemStats.StackSys.Update(int64(memStats.StackSys))
+ runtimeMetrics.MemStats.Sys.Update(int64(memStats.Sys))
+ runtimeMetrics.MemStats.TotalAlloc.Update(int64(memStats.TotalAlloc))
+
+ currentNumCgoCalls := numCgoCall()
+ runtimeMetrics.NumCgoCall.Update(currentNumCgoCalls - numCgoCalls)
+ numCgoCalls = currentNumCgoCalls
+
+ runtimeMetrics.NumGoroutine.Update(int64(runtime.NumGoroutine()))
+
+ runtimeMetrics.NumThread.Update(int64(threadCreateProfile.Count()))
+}
+
+// Register runtimeMetrics for the Go runtime statistics exported in runtime and
+// specifically runtime.MemStats. The runtimeMetrics are named by their
+// fully-qualified Go symbols, i.e. runtime.MemStats.Alloc.
+func RegisterRuntimeMemStats(r Registry) {
+ runtimeMetrics.MemStats.Alloc = NewGauge()
+ runtimeMetrics.MemStats.BuckHashSys = NewGauge()
+ runtimeMetrics.MemStats.DebugGC = NewGauge()
+ runtimeMetrics.MemStats.EnableGC = NewGauge()
+ runtimeMetrics.MemStats.Frees = NewGauge()
+ runtimeMetrics.MemStats.HeapAlloc = NewGauge()
+ runtimeMetrics.MemStats.HeapIdle = NewGauge()
+ runtimeMetrics.MemStats.HeapInuse = NewGauge()
+ runtimeMetrics.MemStats.HeapObjects = NewGauge()
+ runtimeMetrics.MemStats.HeapReleased = NewGauge()
+ runtimeMetrics.MemStats.HeapSys = NewGauge()
+ runtimeMetrics.MemStats.LastGC = NewGauge()
+ runtimeMetrics.MemStats.Lookups = NewGauge()
+ runtimeMetrics.MemStats.Mallocs = NewGauge()
+ runtimeMetrics.MemStats.MCacheInuse = NewGauge()
+ runtimeMetrics.MemStats.MCacheSys = NewGauge()
+ runtimeMetrics.MemStats.MSpanInuse = NewGauge()
+ runtimeMetrics.MemStats.MSpanSys = NewGauge()
+ runtimeMetrics.MemStats.NextGC = NewGauge()
+ runtimeMetrics.MemStats.NumGC = NewGauge()
+ runtimeMetrics.MemStats.GCCPUFraction = NewGaugeFloat64()
+ runtimeMetrics.MemStats.PauseNs = NewHistogram(NewExpDecaySample(1028, 0.015))
+ runtimeMetrics.MemStats.PauseTotalNs = NewGauge()
+ runtimeMetrics.MemStats.StackInuse = NewGauge()
+ runtimeMetrics.MemStats.StackSys = NewGauge()
+ runtimeMetrics.MemStats.Sys = NewGauge()
+ runtimeMetrics.MemStats.TotalAlloc = NewGauge()
+ runtimeMetrics.NumCgoCall = NewGauge()
+ runtimeMetrics.NumGoroutine = NewGauge()
+ runtimeMetrics.NumThread = NewGauge()
+ runtimeMetrics.ReadMemStats = NewTimer()
+
+ r.Register("runtime.MemStats.Alloc", runtimeMetrics.MemStats.Alloc)
+ r.Register("runtime.MemStats.BuckHashSys", runtimeMetrics.MemStats.BuckHashSys)
+ r.Register("runtime.MemStats.DebugGC", runtimeMetrics.MemStats.DebugGC)
+ r.Register("runtime.MemStats.EnableGC", runtimeMetrics.MemStats.EnableGC)
+ r.Register("runtime.MemStats.Frees", runtimeMetrics.MemStats.Frees)
+ r.Register("runtime.MemStats.HeapAlloc", runtimeMetrics.MemStats.HeapAlloc)
+ r.Register("runtime.MemStats.HeapIdle", runtimeMetrics.MemStats.HeapIdle)
+ r.Register("runtime.MemStats.HeapInuse", runtimeMetrics.MemStats.HeapInuse)
+ r.Register("runtime.MemStats.HeapObjects", runtimeMetrics.MemStats.HeapObjects)
+ r.Register("runtime.MemStats.HeapReleased", runtimeMetrics.MemStats.HeapReleased)
+ r.Register("runtime.MemStats.HeapSys", runtimeMetrics.MemStats.HeapSys)
+ r.Register("runtime.MemStats.LastGC", runtimeMetrics.MemStats.LastGC)
+ r.Register("runtime.MemStats.Lookups", runtimeMetrics.MemStats.Lookups)
+ r.Register("runtime.MemStats.Mallocs", runtimeMetrics.MemStats.Mallocs)
+ r.Register("runtime.MemStats.MCacheInuse", runtimeMetrics.MemStats.MCacheInuse)
+ r.Register("runtime.MemStats.MCacheSys", runtimeMetrics.MemStats.MCacheSys)
+ r.Register("runtime.MemStats.MSpanInuse", runtimeMetrics.MemStats.MSpanInuse)
+ r.Register("runtime.MemStats.MSpanSys", runtimeMetrics.MemStats.MSpanSys)
+ r.Register("runtime.MemStats.NextGC", runtimeMetrics.MemStats.NextGC)
+ r.Register("runtime.MemStats.NumGC", runtimeMetrics.MemStats.NumGC)
+ r.Register("runtime.MemStats.GCCPUFraction", runtimeMetrics.MemStats.GCCPUFraction)
+ r.Register("runtime.MemStats.PauseNs", runtimeMetrics.MemStats.PauseNs)
+ r.Register("runtime.MemStats.PauseTotalNs", runtimeMetrics.MemStats.PauseTotalNs)
+ r.Register("runtime.MemStats.StackInuse", runtimeMetrics.MemStats.StackInuse)
+ r.Register("runtime.MemStats.StackSys", runtimeMetrics.MemStats.StackSys)
+ r.Register("runtime.MemStats.Sys", runtimeMetrics.MemStats.Sys)
+ r.Register("runtime.MemStats.TotalAlloc", runtimeMetrics.MemStats.TotalAlloc)
+ r.Register("runtime.NumCgoCall", runtimeMetrics.NumCgoCall)
+ r.Register("runtime.NumGoroutine", runtimeMetrics.NumGoroutine)
+ r.Register("runtime.NumThread", runtimeMetrics.NumThread)
+ r.Register("runtime.ReadMemStats", runtimeMetrics.ReadMemStats)
+}
diff --git a/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/runtime_cgo.go b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/runtime_cgo.go
new file mode 100644
index 00000000..e3391f4e
--- /dev/null
+++ b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/runtime_cgo.go
@@ -0,0 +1,10 @@
+// +build cgo
+// +build !appengine
+
+package metrics
+
+import "runtime"
+
+func numCgoCall() int64 {
+ return runtime.NumCgoCall()
+}
diff --git a/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/runtime_gccpufraction.go b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/runtime_gccpufraction.go
new file mode 100644
index 00000000..ca12c05b
--- /dev/null
+++ b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/runtime_gccpufraction.go
@@ -0,0 +1,9 @@
+// +build go1.5
+
+package metrics
+
+import "runtime"
+
+func gcCPUFraction(memStats *runtime.MemStats) float64 {
+ return memStats.GCCPUFraction
+}
diff --git a/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/runtime_no_cgo.go b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/runtime_no_cgo.go
new file mode 100644
index 00000000..616a3b47
--- /dev/null
+++ b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/runtime_no_cgo.go
@@ -0,0 +1,7 @@
+// +build !cgo appengine
+
+package metrics
+
+func numCgoCall() int64 {
+ return 0
+}
diff --git a/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/runtime_no_gccpufraction.go b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/runtime_no_gccpufraction.go
new file mode 100644
index 00000000..be96aa6f
--- /dev/null
+++ b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/runtime_no_gccpufraction.go
@@ -0,0 +1,9 @@
+// +build !go1.5
+
+package metrics
+
+import "runtime"
+
+func gcCPUFraction(memStats *runtime.MemStats) float64 {
+ return 0
+}
diff --git a/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/sample.go b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/sample.go
new file mode 100644
index 00000000..fecee5ef
--- /dev/null
+++ b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/sample.go
@@ -0,0 +1,616 @@
+package metrics
+
+import (
+ "math"
+ "math/rand"
+ "sort"
+ "sync"
+ "time"
+)
+
+const rescaleThreshold = time.Hour
+
+// Samples maintain a statistically-significant selection of values from
+// a stream.
+type Sample interface {
+ Clear()
+ Count() int64
+ Max() int64
+ Mean() float64
+ Min() int64
+ Percentile(float64) float64
+ Percentiles([]float64) []float64
+ Size() int
+ Snapshot() Sample
+ StdDev() float64
+ Sum() int64
+ Update(int64)
+ Values() []int64
+ Variance() float64
+}
+
+// ExpDecaySample is an exponentially-decaying sample using a forward-decaying
+// priority reservoir. See Cormode et al's "Forward Decay: A Practical Time
+// Decay Model for Streaming Systems".
+//
+//
+type ExpDecaySample struct {
+ alpha float64
+ count int64
+ mutex sync.Mutex
+ reservoirSize int
+ t0, t1 time.Time
+ values *expDecaySampleHeap
+}
+
+// NewExpDecaySample constructs a new exponentially-decaying sample with the
+// given reservoir size and alpha.
+func NewExpDecaySample(reservoirSize int, alpha float64) Sample {
+ if UseNilMetrics {
+ return NilSample{}
+ }
+ s := &ExpDecaySample{
+ alpha: alpha,
+ reservoirSize: reservoirSize,
+ t0: time.Now(),
+ values: newExpDecaySampleHeap(reservoirSize),
+ }
+ s.t1 = s.t0.Add(rescaleThreshold)
+ return s
+}
+
+// Clear clears all samples.
+func (s *ExpDecaySample) Clear() {
+ s.mutex.Lock()
+ defer s.mutex.Unlock()
+ s.count = 0
+ s.t0 = time.Now()
+ s.t1 = s.t0.Add(rescaleThreshold)
+ s.values.Clear()
+}
+
+// Count returns the number of samples recorded, which may exceed the
+// reservoir size.
+func (s *ExpDecaySample) Count() int64 {
+ s.mutex.Lock()
+ defer s.mutex.Unlock()
+ return s.count
+}
+
+// Max returns the maximum value in the sample, which may not be the maximum
+// value ever to be part of the sample.
+func (s *ExpDecaySample) Max() int64 {
+ return SampleMax(s.Values())
+}
+
+// Mean returns the mean of the values in the sample.
+func (s *ExpDecaySample) Mean() float64 {
+ return SampleMean(s.Values())
+}
+
+// Min returns the minimum value in the sample, which may not be the minimum
+// value ever to be part of the sample.
+func (s *ExpDecaySample) Min() int64 {
+ return SampleMin(s.Values())
+}
+
+// Percentile returns an arbitrary percentile of values in the sample.
+func (s *ExpDecaySample) Percentile(p float64) float64 {
+ return SamplePercentile(s.Values(), p)
+}
+
+// Percentiles returns a slice of arbitrary percentiles of values in the
+// sample.
+func (s *ExpDecaySample) Percentiles(ps []float64) []float64 {
+ return SamplePercentiles(s.Values(), ps)
+}
+
+// Size returns the size of the sample, which is at most the reservoir size.
+func (s *ExpDecaySample) Size() int {
+ s.mutex.Lock()
+ defer s.mutex.Unlock()
+ return s.values.Size()
+}
+
+// Snapshot returns a read-only copy of the sample.
+func (s *ExpDecaySample) Snapshot() Sample {
+ s.mutex.Lock()
+ defer s.mutex.Unlock()
+ vals := s.values.Values()
+ values := make([]int64, len(vals))
+ for i, v := range vals {
+ values[i] = v.v
+ }
+ return &SampleSnapshot{
+ count: s.count,
+ values: values,
+ }
+}
+
+// StdDev returns the standard deviation of the values in the sample.
+func (s *ExpDecaySample) StdDev() float64 {
+ return SampleStdDev(s.Values())
+}
+
+// Sum returns the sum of the values in the sample.
+func (s *ExpDecaySample) Sum() int64 {
+ return SampleSum(s.Values())
+}
+
+// Update samples a new value.
+func (s *ExpDecaySample) Update(v int64) {
+ s.update(time.Now(), v)
+}
+
+// Values returns a copy of the values in the sample.
+func (s *ExpDecaySample) Values() []int64 {
+ s.mutex.Lock()
+ defer s.mutex.Unlock()
+ vals := s.values.Values()
+ values := make([]int64, len(vals))
+ for i, v := range vals {
+ values[i] = v.v
+ }
+ return values
+}
+
+// Variance returns the variance of the values in the sample.
+func (s *ExpDecaySample) Variance() float64 {
+ return SampleVariance(s.Values())
+}
+
+// update samples a new value at a particular timestamp. This is a method all
+// its own to facilitate testing.
+func (s *ExpDecaySample) update(t time.Time, v int64) {
+ s.mutex.Lock()
+ defer s.mutex.Unlock()
+ s.count++
+ if s.values.Size() == s.reservoirSize {
+ s.values.Pop()
+ }
+ s.values.Push(expDecaySample{
+ k: math.Exp(t.Sub(s.t0).Seconds()*s.alpha) / rand.Float64(),
+ v: v,
+ })
+ if t.After(s.t1) {
+ values := s.values.Values()
+ t0 := s.t0
+ s.values.Clear()
+ s.t0 = t
+ s.t1 = s.t0.Add(rescaleThreshold)
+ for _, v := range values {
+ v.k = v.k * math.Exp(-s.alpha*s.t0.Sub(t0).Seconds())
+ s.values.Push(v)
+ }
+ }
+}
+
+// NilSample is a no-op Sample.
+type NilSample struct{}
+
+// Clear is a no-op.
+func (NilSample) Clear() {}
+
+// Count is a no-op.
+func (NilSample) Count() int64 { return 0 }
+
+// Max is a no-op.
+func (NilSample) Max() int64 { return 0 }
+
+// Mean is a no-op.
+func (NilSample) Mean() float64 { return 0.0 }
+
+// Min is a no-op.
+func (NilSample) Min() int64 { return 0 }
+
+// Percentile is a no-op.
+func (NilSample) Percentile(p float64) float64 { return 0.0 }
+
+// Percentiles is a no-op.
+func (NilSample) Percentiles(ps []float64) []float64 {
+ return make([]float64, len(ps))
+}
+
+// Size is a no-op.
+func (NilSample) Size() int { return 0 }
+
+// Sample is a no-op.
+func (NilSample) Snapshot() Sample { return NilSample{} }
+
+// StdDev is a no-op.
+func (NilSample) StdDev() float64 { return 0.0 }
+
+// Sum is a no-op.
+func (NilSample) Sum() int64 { return 0 }
+
+// Update is a no-op.
+func (NilSample) Update(v int64) {}
+
+// Values is a no-op.
+func (NilSample) Values() []int64 { return []int64{} }
+
+// Variance is a no-op.
+func (NilSample) Variance() float64 { return 0.0 }
+
+// SampleMax returns the maximum value of the slice of int64.
+func SampleMax(values []int64) int64 {
+ if 0 == len(values) {
+ return 0
+ }
+ var max int64 = math.MinInt64
+ for _, v := range values {
+ if max < v {
+ max = v
+ }
+ }
+ return max
+}
+
+// SampleMean returns the mean value of the slice of int64.
+func SampleMean(values []int64) float64 {
+ if 0 == len(values) {
+ return 0.0
+ }
+ return float64(SampleSum(values)) / float64(len(values))
+}
+
+// SampleMin returns the minimum value of the slice of int64.
+func SampleMin(values []int64) int64 {
+ if 0 == len(values) {
+ return 0
+ }
+ var min int64 = math.MaxInt64
+ for _, v := range values {
+ if min > v {
+ min = v
+ }
+ }
+ return min
+}
+
+// SamplePercentiles returns an arbitrary percentile of the slice of int64.
+func SamplePercentile(values int64Slice, p float64) float64 {
+ return SamplePercentiles(values, []float64{p})[0]
+}
+
+// SamplePercentiles returns a slice of arbitrary percentiles of the slice of
+// int64.
+func SamplePercentiles(values int64Slice, ps []float64) []float64 {
+ scores := make([]float64, len(ps))
+ size := len(values)
+ if size > 0 {
+ sort.Sort(values)
+ for i, p := range ps {
+ pos := p * float64(size+1)
+ if pos < 1.0 {
+ scores[i] = float64(values[0])
+ } else if pos >= float64(size) {
+ scores[i] = float64(values[size-1])
+ } else {
+ lower := float64(values[int(pos)-1])
+ upper := float64(values[int(pos)])
+ scores[i] = lower + (pos-math.Floor(pos))*(upper-lower)
+ }
+ }
+ }
+ return scores
+}
+
+// SampleSnapshot is a read-only copy of another Sample.
+type SampleSnapshot struct {
+ count int64
+ values []int64
+}
+
+func NewSampleSnapshot(count int64, values []int64) *SampleSnapshot {
+ return &SampleSnapshot{
+ count: count,
+ values: values,
+ }
+}
+
+// Clear panics.
+func (*SampleSnapshot) Clear() {
+ panic("Clear called on a SampleSnapshot")
+}
+
+// Count returns the count of inputs at the time the snapshot was taken.
+func (s *SampleSnapshot) Count() int64 { return s.count }
+
+// Max returns the maximal value at the time the snapshot was taken.
+func (s *SampleSnapshot) Max() int64 { return SampleMax(s.values) }
+
+// Mean returns the mean value at the time the snapshot was taken.
+func (s *SampleSnapshot) Mean() float64 { return SampleMean(s.values) }
+
+// Min returns the minimal value at the time the snapshot was taken.
+func (s *SampleSnapshot) Min() int64 { return SampleMin(s.values) }
+
+// Percentile returns an arbitrary percentile of values at the time the
+// snapshot was taken.
+func (s *SampleSnapshot) Percentile(p float64) float64 {
+ return SamplePercentile(s.values, p)
+}
+
+// Percentiles returns a slice of arbitrary percentiles of values at the time
+// the snapshot was taken.
+func (s *SampleSnapshot) Percentiles(ps []float64) []float64 {
+ return SamplePercentiles(s.values, ps)
+}
+
+// Size returns the size of the sample at the time the snapshot was taken.
+func (s *SampleSnapshot) Size() int { return len(s.values) }
+
+// Snapshot returns the snapshot.
+func (s *SampleSnapshot) Snapshot() Sample { return s }
+
+// StdDev returns the standard deviation of values at the time the snapshot was
+// taken.
+func (s *SampleSnapshot) StdDev() float64 { return SampleStdDev(s.values) }
+
+// Sum returns the sum of values at the time the snapshot was taken.
+func (s *SampleSnapshot) Sum() int64 { return SampleSum(s.values) }
+
+// Update panics.
+func (*SampleSnapshot) Update(int64) {
+ panic("Update called on a SampleSnapshot")
+}
+
+// Values returns a copy of the values in the sample.
+func (s *SampleSnapshot) Values() []int64 {
+ values := make([]int64, len(s.values))
+ copy(values, s.values)
+ return values
+}
+
+// Variance returns the variance of values at the time the snapshot was taken.
+func (s *SampleSnapshot) Variance() float64 { return SampleVariance(s.values) }
+
+// SampleStdDev returns the standard deviation of the slice of int64.
+func SampleStdDev(values []int64) float64 {
+ return math.Sqrt(SampleVariance(values))
+}
+
+// SampleSum returns the sum of the slice of int64.
+func SampleSum(values []int64) int64 {
+ var sum int64
+ for _, v := range values {
+ sum += v
+ }
+ return sum
+}
+
+// SampleVariance returns the variance of the slice of int64.
+func SampleVariance(values []int64) float64 {
+ if 0 == len(values) {
+ return 0.0
+ }
+ m := SampleMean(values)
+ var sum float64
+ for _, v := range values {
+ d := float64(v) - m
+ sum += d * d
+ }
+ return sum / float64(len(values))
+}
+
+// A uniform sample using Vitter's Algorithm R.
+//
+//
+type UniformSample struct {
+ count int64
+ mutex sync.Mutex
+ reservoirSize int
+ values []int64
+}
+
+// NewUniformSample constructs a new uniform sample with the given reservoir
+// size.
+func NewUniformSample(reservoirSize int) Sample {
+ if UseNilMetrics {
+ return NilSample{}
+ }
+ return &UniformSample{
+ reservoirSize: reservoirSize,
+ values: make([]int64, 0, reservoirSize),
+ }
+}
+
+// Clear clears all samples.
+func (s *UniformSample) Clear() {
+ s.mutex.Lock()
+ defer s.mutex.Unlock()
+ s.count = 0
+ s.values = make([]int64, 0, s.reservoirSize)
+}
+
+// Count returns the number of samples recorded, which may exceed the
+// reservoir size.
+func (s *UniformSample) Count() int64 {
+ s.mutex.Lock()
+ defer s.mutex.Unlock()
+ return s.count
+}
+
+// Max returns the maximum value in the sample, which may not be the maximum
+// value ever to be part of the sample.
+func (s *UniformSample) Max() int64 {
+ s.mutex.Lock()
+ defer s.mutex.Unlock()
+ return SampleMax(s.values)
+}
+
+// Mean returns the mean of the values in the sample.
+func (s *UniformSample) Mean() float64 {
+ s.mutex.Lock()
+ defer s.mutex.Unlock()
+ return SampleMean(s.values)
+}
+
+// Min returns the minimum value in the sample, which may not be the minimum
+// value ever to be part of the sample.
+func (s *UniformSample) Min() int64 {
+ s.mutex.Lock()
+ defer s.mutex.Unlock()
+ return SampleMin(s.values)
+}
+
+// Percentile returns an arbitrary percentile of values in the sample.
+func (s *UniformSample) Percentile(p float64) float64 {
+ s.mutex.Lock()
+ defer s.mutex.Unlock()
+ return SamplePercentile(s.values, p)
+}
+
+// Percentiles returns a slice of arbitrary percentiles of values in the
+// sample.
+func (s *UniformSample) Percentiles(ps []float64) []float64 {
+ s.mutex.Lock()
+ defer s.mutex.Unlock()
+ return SamplePercentiles(s.values, ps)
+}
+
+// Size returns the size of the sample, which is at most the reservoir size.
+func (s *UniformSample) Size() int {
+ s.mutex.Lock()
+ defer s.mutex.Unlock()
+ return len(s.values)
+}
+
+// Snapshot returns a read-only copy of the sample.
+func (s *UniformSample) Snapshot() Sample {
+ s.mutex.Lock()
+ defer s.mutex.Unlock()
+ values := make([]int64, len(s.values))
+ copy(values, s.values)
+ return &SampleSnapshot{
+ count: s.count,
+ values: values,
+ }
+}
+
+// StdDev returns the standard deviation of the values in the sample.
+func (s *UniformSample) StdDev() float64 {
+ s.mutex.Lock()
+ defer s.mutex.Unlock()
+ return SampleStdDev(s.values)
+}
+
+// Sum returns the sum of the values in the sample.
+func (s *UniformSample) Sum() int64 {
+ s.mutex.Lock()
+ defer s.mutex.Unlock()
+ return SampleSum(s.values)
+}
+
+// Update samples a new value.
+func (s *UniformSample) Update(v int64) {
+ s.mutex.Lock()
+ defer s.mutex.Unlock()
+ s.count++
+ if len(s.values) < s.reservoirSize {
+ s.values = append(s.values, v)
+ } else {
+ r := rand.Int63n(s.count)
+ if r < int64(len(s.values)) {
+ s.values[int(r)] = v
+ }
+ }
+}
+
+// Values returns a copy of the values in the sample.
+func (s *UniformSample) Values() []int64 {
+ s.mutex.Lock()
+ defer s.mutex.Unlock()
+ values := make([]int64, len(s.values))
+ copy(values, s.values)
+ return values
+}
+
+// Variance returns the variance of the values in the sample.
+func (s *UniformSample) Variance() float64 {
+ s.mutex.Lock()
+ defer s.mutex.Unlock()
+ return SampleVariance(s.values)
+}
+
+// expDecaySample represents an individual sample in a heap.
+type expDecaySample struct {
+ k float64
+ v int64
+}
+
+func newExpDecaySampleHeap(reservoirSize int) *expDecaySampleHeap {
+ return &expDecaySampleHeap{make([]expDecaySample, 0, reservoirSize)}
+}
+
+// expDecaySampleHeap is a min-heap of expDecaySamples.
+// The internal implementation is copied from the standard library's container/heap
+type expDecaySampleHeap struct {
+ s []expDecaySample
+}
+
+func (h *expDecaySampleHeap) Clear() {
+ h.s = h.s[:0]
+}
+
+func (h *expDecaySampleHeap) Push(s expDecaySample) {
+ n := len(h.s)
+ h.s = h.s[0 : n+1]
+ h.s[n] = s
+ h.up(n)
+}
+
+func (h *expDecaySampleHeap) Pop() expDecaySample {
+ n := len(h.s) - 1
+ h.s[0], h.s[n] = h.s[n], h.s[0]
+ h.down(0, n)
+
+ n = len(h.s)
+ s := h.s[n-1]
+ h.s = h.s[0 : n-1]
+ return s
+}
+
+func (h *expDecaySampleHeap) Size() int {
+ return len(h.s)
+}
+
+func (h *expDecaySampleHeap) Values() []expDecaySample {
+ return h.s
+}
+
+func (h *expDecaySampleHeap) up(j int) {
+ for {
+ i := (j - 1) / 2 // parent
+ if i == j || !(h.s[j].k < h.s[i].k) {
+ break
+ }
+ h.s[i], h.s[j] = h.s[j], h.s[i]
+ j = i
+ }
+}
+
+func (h *expDecaySampleHeap) down(i, n int) {
+ for {
+ j1 := 2*i + 1
+ if j1 >= n || j1 < 0 { // j1 < 0 after int overflow
+ break
+ }
+ j := j1 // left child
+ if j2 := j1 + 1; j2 < n && !(h.s[j1].k < h.s[j2].k) {
+ j = j2 // = 2*i + 2 // right child
+ }
+ if !(h.s[j].k < h.s[i].k) {
+ break
+ }
+ h.s[i], h.s[j] = h.s[j], h.s[i]
+ i = j
+ }
+}
+
+type int64Slice []int64
+
+func (p int64Slice) Len() int { return len(p) }
+func (p int64Slice) Less(i, j int) bool { return p[i] < p[j] }
+func (p int64Slice) Swap(i, j int) { p[i], p[j] = p[j], p[i] }
diff --git a/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/syslog.go b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/syslog.go
new file mode 100644
index 00000000..693f1908
--- /dev/null
+++ b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/syslog.go
@@ -0,0 +1,78 @@
+// +build !windows
+
+package metrics
+
+import (
+ "fmt"
+ "log/syslog"
+ "time"
+)
+
+// Output each metric in the given registry to syslog periodically using
+// the given syslogger.
+func Syslog(r Registry, d time.Duration, w *syslog.Writer) {
+ for _ = range time.Tick(d) {
+ r.Each(func(name string, i interface{}) {
+ switch metric := i.(type) {
+ case Counter:
+ w.Info(fmt.Sprintf("counter %s: count: %d", name, metric.Count()))
+ case Gauge:
+ w.Info(fmt.Sprintf("gauge %s: value: %d", name, metric.Value()))
+ case GaugeFloat64:
+ w.Info(fmt.Sprintf("gauge %s: value: %f", name, metric.Value()))
+ case Healthcheck:
+ metric.Check()
+ w.Info(fmt.Sprintf("healthcheck %s: error: %v", name, metric.Error()))
+ case Histogram:
+ h := metric.Snapshot()
+ ps := h.Percentiles([]float64{0.5, 0.75, 0.95, 0.99, 0.999})
+ w.Info(fmt.Sprintf(
+ "histogram %s: count: %d min: %d max: %d mean: %.2f stddev: %.2f median: %.2f 75%%: %.2f 95%%: %.2f 99%%: %.2f 99.9%%: %.2f",
+ name,
+ h.Count(),
+ h.Min(),
+ h.Max(),
+ h.Mean(),
+ h.StdDev(),
+ ps[0],
+ ps[1],
+ ps[2],
+ ps[3],
+ ps[4],
+ ))
+ case Meter:
+ m := metric.Snapshot()
+ w.Info(fmt.Sprintf(
+ "meter %s: count: %d 1-min: %.2f 5-min: %.2f 15-min: %.2f mean: %.2f",
+ name,
+ m.Count(),
+ m.Rate1(),
+ m.Rate5(),
+ m.Rate15(),
+ m.RateMean(),
+ ))
+ case Timer:
+ t := metric.Snapshot()
+ ps := t.Percentiles([]float64{0.5, 0.75, 0.95, 0.99, 0.999})
+ w.Info(fmt.Sprintf(
+ "timer %s: count: %d min: %d max: %d mean: %.2f stddev: %.2f median: %.2f 75%%: %.2f 95%%: %.2f 99%%: %.2f 99.9%%: %.2f 1-min: %.2f 5-min: %.2f 15-min: %.2f mean-rate: %.2f",
+ name,
+ t.Count(),
+ t.Min(),
+ t.Max(),
+ t.Mean(),
+ t.StdDev(),
+ ps[0],
+ ps[1],
+ ps[2],
+ ps[3],
+ ps[4],
+ t.Rate1(),
+ t.Rate5(),
+ t.Rate15(),
+ t.RateMean(),
+ ))
+ }
+ })
+ }
+}
diff --git a/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/timer.go b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/timer.go
new file mode 100644
index 00000000..d6ec4c62
--- /dev/null
+++ b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/timer.go
@@ -0,0 +1,329 @@
+package metrics
+
+import (
+ "sync"
+ "time"
+)
+
+// Timers capture the duration and rate of events.
+type Timer interface {
+ Count() int64
+ Max() int64
+ Mean() float64
+ Min() int64
+ Percentile(float64) float64
+ Percentiles([]float64) []float64
+ Rate1() float64
+ Rate5() float64
+ Rate15() float64
+ RateMean() float64
+ Snapshot() Timer
+ StdDev() float64
+ Stop()
+ Sum() int64
+ Time(func())
+ Update(time.Duration)
+ UpdateSince(time.Time)
+ Variance() float64
+}
+
+// GetOrRegisterTimer returns an existing Timer or constructs and registers a
+// new StandardTimer.
+// Be sure to unregister the meter from the registry once it is of no use to
+// allow for garbage collection.
+func GetOrRegisterTimer(name string, r Registry) Timer {
+ if nil == r {
+ r = DefaultRegistry
+ }
+ return r.GetOrRegister(name, NewTimer).(Timer)
+}
+
+// NewCustomTimer constructs a new StandardTimer from a Histogram and a Meter.
+// Be sure to call Stop() once the timer is of no use to allow for garbage collection.
+func NewCustomTimer(h Histogram, m Meter) Timer {
+ if UseNilMetrics {
+ return NilTimer{}
+ }
+ return &StandardTimer{
+ histogram: h,
+ meter: m,
+ }
+}
+
+// NewRegisteredTimer constructs and registers a new StandardTimer.
+// Be sure to unregister the meter from the registry once it is of no use to
+// allow for garbage collection.
+func NewRegisteredTimer(name string, r Registry) Timer {
+ c := NewTimer()
+ if nil == r {
+ r = DefaultRegistry
+ }
+ r.Register(name, c)
+ return c
+}
+
+// NewTimer constructs a new StandardTimer using an exponentially-decaying
+// sample with the same reservoir size and alpha as UNIX load averages.
+// Be sure to call Stop() once the timer is of no use to allow for garbage collection.
+func NewTimer() Timer {
+ if UseNilMetrics {
+ return NilTimer{}
+ }
+ return &StandardTimer{
+ histogram: NewHistogram(NewExpDecaySample(1028, 0.015)),
+ meter: NewMeter(),
+ }
+}
+
+// NilTimer is a no-op Timer.
+type NilTimer struct {
+ h Histogram
+ m Meter
+}
+
+// Count is a no-op.
+func (NilTimer) Count() int64 { return 0 }
+
+// Max is a no-op.
+func (NilTimer) Max() int64 { return 0 }
+
+// Mean is a no-op.
+func (NilTimer) Mean() float64 { return 0.0 }
+
+// Min is a no-op.
+func (NilTimer) Min() int64 { return 0 }
+
+// Percentile is a no-op.
+func (NilTimer) Percentile(p float64) float64 { return 0.0 }
+
+// Percentiles is a no-op.
+func (NilTimer) Percentiles(ps []float64) []float64 {
+ return make([]float64, len(ps))
+}
+
+// Rate1 is a no-op.
+func (NilTimer) Rate1() float64 { return 0.0 }
+
+// Rate5 is a no-op.
+func (NilTimer) Rate5() float64 { return 0.0 }
+
+// Rate15 is a no-op.
+func (NilTimer) Rate15() float64 { return 0.0 }
+
+// RateMean is a no-op.
+func (NilTimer) RateMean() float64 { return 0.0 }
+
+// Snapshot is a no-op.
+func (NilTimer) Snapshot() Timer { return NilTimer{} }
+
+// StdDev is a no-op.
+func (NilTimer) StdDev() float64 { return 0.0 }
+
+// Stop is a no-op.
+func (NilTimer) Stop() {}
+
+// Sum is a no-op.
+func (NilTimer) Sum() int64 { return 0 }
+
+// Time is a no-op.
+func (NilTimer) Time(func()) {}
+
+// Update is a no-op.
+func (NilTimer) Update(time.Duration) {}
+
+// UpdateSince is a no-op.
+func (NilTimer) UpdateSince(time.Time) {}
+
+// Variance is a no-op.
+func (NilTimer) Variance() float64 { return 0.0 }
+
+// StandardTimer is the standard implementation of a Timer and uses a Histogram
+// and Meter.
+type StandardTimer struct {
+ histogram Histogram
+ meter Meter
+ mutex sync.Mutex
+}
+
+// Count returns the number of events recorded.
+func (t *StandardTimer) Count() int64 {
+ return t.histogram.Count()
+}
+
+// Max returns the maximum value in the sample.
+func (t *StandardTimer) Max() int64 {
+ return t.histogram.Max()
+}
+
+// Mean returns the mean of the values in the sample.
+func (t *StandardTimer) Mean() float64 {
+ return t.histogram.Mean()
+}
+
+// Min returns the minimum value in the sample.
+func (t *StandardTimer) Min() int64 {
+ return t.histogram.Min()
+}
+
+// Percentile returns an arbitrary percentile of the values in the sample.
+func (t *StandardTimer) Percentile(p float64) float64 {
+ return t.histogram.Percentile(p)
+}
+
+// Percentiles returns a slice of arbitrary percentiles of the values in the
+// sample.
+func (t *StandardTimer) Percentiles(ps []float64) []float64 {
+ return t.histogram.Percentiles(ps)
+}
+
+// Rate1 returns the one-minute moving average rate of events per second.
+func (t *StandardTimer) Rate1() float64 {
+ return t.meter.Rate1()
+}
+
+// Rate5 returns the five-minute moving average rate of events per second.
+func (t *StandardTimer) Rate5() float64 {
+ return t.meter.Rate5()
+}
+
+// Rate15 returns the fifteen-minute moving average rate of events per second.
+func (t *StandardTimer) Rate15() float64 {
+ return t.meter.Rate15()
+}
+
+// RateMean returns the meter's mean rate of events per second.
+func (t *StandardTimer) RateMean() float64 {
+ return t.meter.RateMean()
+}
+
+// Snapshot returns a read-only copy of the timer.
+func (t *StandardTimer) Snapshot() Timer {
+ t.mutex.Lock()
+ defer t.mutex.Unlock()
+ return &TimerSnapshot{
+ histogram: t.histogram.Snapshot().(*HistogramSnapshot),
+ meter: t.meter.Snapshot().(*MeterSnapshot),
+ }
+}
+
+// StdDev returns the standard deviation of the values in the sample.
+func (t *StandardTimer) StdDev() float64 {
+ return t.histogram.StdDev()
+}
+
+// Stop stops the meter.
+func (t *StandardTimer) Stop() {
+ t.meter.Stop()
+}
+
+// Sum returns the sum in the sample.
+func (t *StandardTimer) Sum() int64 {
+ return t.histogram.Sum()
+}
+
+// Record the duration of the execution of the given function.
+func (t *StandardTimer) Time(f func()) {
+ ts := time.Now()
+ f()
+ t.Update(time.Since(ts))
+}
+
+// Record the duration of an event.
+func (t *StandardTimer) Update(d time.Duration) {
+ t.mutex.Lock()
+ defer t.mutex.Unlock()
+ t.histogram.Update(int64(d))
+ t.meter.Mark(1)
+}
+
+// Record the duration of an event that started at a time and ends now.
+func (t *StandardTimer) UpdateSince(ts time.Time) {
+ t.mutex.Lock()
+ defer t.mutex.Unlock()
+ t.histogram.Update(int64(time.Since(ts)))
+ t.meter.Mark(1)
+}
+
+// Variance returns the variance of the values in the sample.
+func (t *StandardTimer) Variance() float64 {
+ return t.histogram.Variance()
+}
+
+// TimerSnapshot is a read-only copy of another Timer.
+type TimerSnapshot struct {
+ histogram *HistogramSnapshot
+ meter *MeterSnapshot
+}
+
+// Count returns the number of events recorded at the time the snapshot was
+// taken.
+func (t *TimerSnapshot) Count() int64 { return t.histogram.Count() }
+
+// Max returns the maximum value at the time the snapshot was taken.
+func (t *TimerSnapshot) Max() int64 { return t.histogram.Max() }
+
+// Mean returns the mean value at the time the snapshot was taken.
+func (t *TimerSnapshot) Mean() float64 { return t.histogram.Mean() }
+
+// Min returns the minimum value at the time the snapshot was taken.
+func (t *TimerSnapshot) Min() int64 { return t.histogram.Min() }
+
+// Percentile returns an arbitrary percentile of sampled values at the time the
+// snapshot was taken.
+func (t *TimerSnapshot) Percentile(p float64) float64 {
+ return t.histogram.Percentile(p)
+}
+
+// Percentiles returns a slice of arbitrary percentiles of sampled values at
+// the time the snapshot was taken.
+func (t *TimerSnapshot) Percentiles(ps []float64) []float64 {
+ return t.histogram.Percentiles(ps)
+}
+
+// Rate1 returns the one-minute moving average rate of events per second at the
+// time the snapshot was taken.
+func (t *TimerSnapshot) Rate1() float64 { return t.meter.Rate1() }
+
+// Rate5 returns the five-minute moving average rate of events per second at
+// the time the snapshot was taken.
+func (t *TimerSnapshot) Rate5() float64 { return t.meter.Rate5() }
+
+// Rate15 returns the fifteen-minute moving average rate of events per second
+// at the time the snapshot was taken.
+func (t *TimerSnapshot) Rate15() float64 { return t.meter.Rate15() }
+
+// RateMean returns the meter's mean rate of events per second at the time the
+// snapshot was taken.
+func (t *TimerSnapshot) RateMean() float64 { return t.meter.RateMean() }
+
+// Snapshot returns the snapshot.
+func (t *TimerSnapshot) Snapshot() Timer { return t }
+
+// StdDev returns the standard deviation of the values at the time the snapshot
+// was taken.
+func (t *TimerSnapshot) StdDev() float64 { return t.histogram.StdDev() }
+
+// Stop is a no-op.
+func (t *TimerSnapshot) Stop() {}
+
+// Sum returns the sum at the time the snapshot was taken.
+func (t *TimerSnapshot) Sum() int64 { return t.histogram.Sum() }
+
+// Time panics.
+func (*TimerSnapshot) Time(func()) {
+ panic("Time called on a TimerSnapshot")
+}
+
+// Update panics.
+func (*TimerSnapshot) Update(time.Duration) {
+ panic("Update called on a TimerSnapshot")
+}
+
+// UpdateSince panics.
+func (*TimerSnapshot) UpdateSince(time.Time) {
+ panic("UpdateSince called on a TimerSnapshot")
+}
+
+// Variance returns the variance of the values at the time the snapshot was
+// taken.
+func (t *TimerSnapshot) Variance() float64 { return t.histogram.Variance() }
diff --git a/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/validate.sh b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/validate.sh
new file mode 100644
index 00000000..c4ae91e6
--- /dev/null
+++ b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/validate.sh
@@ -0,0 +1,10 @@
+#!/bin/bash
+
+set -e
+
+# check there are no formatting issues
+GOFMT_LINES=`gofmt -l . | wc -l | xargs`
+test $GOFMT_LINES -eq 0 || echo "gofmt needs to be run, ${GOFMT_LINES} files have issues"
+
+# run the tests for the root package
+go test -race .
diff --git a/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/writer.go b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/writer.go
new file mode 100644
index 00000000..091e971d
--- /dev/null
+++ b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/rcrowley/go-metrics/writer.go
@@ -0,0 +1,100 @@
+package metrics
+
+import (
+ "fmt"
+ "io"
+ "sort"
+ "time"
+)
+
+// Write sorts writes each metric in the given registry periodically to the
+// given io.Writer.
+func Write(r Registry, d time.Duration, w io.Writer) {
+ for _ = range time.Tick(d) {
+ WriteOnce(r, w)
+ }
+}
+
+// WriteOnce sorts and writes metrics in the given registry to the given
+// io.Writer.
+func WriteOnce(r Registry, w io.Writer) {
+ var namedMetrics namedMetricSlice
+ r.Each(func(name string, i interface{}) {
+ namedMetrics = append(namedMetrics, namedMetric{name, i})
+ })
+
+ sort.Sort(namedMetrics)
+ for _, namedMetric := range namedMetrics {
+ switch metric := namedMetric.m.(type) {
+ case Counter:
+ fmt.Fprintf(w, "counter %s\n", namedMetric.name)
+ fmt.Fprintf(w, " count: %9d\n", metric.Count())
+ case Gauge:
+ fmt.Fprintf(w, "gauge %s\n", namedMetric.name)
+ fmt.Fprintf(w, " value: %9d\n", metric.Value())
+ case GaugeFloat64:
+ fmt.Fprintf(w, "gauge %s\n", namedMetric.name)
+ fmt.Fprintf(w, " value: %f\n", metric.Value())
+ case Healthcheck:
+ metric.Check()
+ fmt.Fprintf(w, "healthcheck %s\n", namedMetric.name)
+ fmt.Fprintf(w, " error: %v\n", metric.Error())
+ case Histogram:
+ h := metric.Snapshot()
+ ps := h.Percentiles([]float64{0.5, 0.75, 0.95, 0.99, 0.999})
+ fmt.Fprintf(w, "histogram %s\n", namedMetric.name)
+ fmt.Fprintf(w, " count: %9d\n", h.Count())
+ fmt.Fprintf(w, " min: %9d\n", h.Min())
+ fmt.Fprintf(w, " max: %9d\n", h.Max())
+ fmt.Fprintf(w, " mean: %12.2f\n", h.Mean())
+ fmt.Fprintf(w, " stddev: %12.2f\n", h.StdDev())
+ fmt.Fprintf(w, " median: %12.2f\n", ps[0])
+ fmt.Fprintf(w, " 75%%: %12.2f\n", ps[1])
+ fmt.Fprintf(w, " 95%%: %12.2f\n", ps[2])
+ fmt.Fprintf(w, " 99%%: %12.2f\n", ps[3])
+ fmt.Fprintf(w, " 99.9%%: %12.2f\n", ps[4])
+ case Meter:
+ m := metric.Snapshot()
+ fmt.Fprintf(w, "meter %s\n", namedMetric.name)
+ fmt.Fprintf(w, " count: %9d\n", m.Count())
+ fmt.Fprintf(w, " 1-min rate: %12.2f\n", m.Rate1())
+ fmt.Fprintf(w, " 5-min rate: %12.2f\n", m.Rate5())
+ fmt.Fprintf(w, " 15-min rate: %12.2f\n", m.Rate15())
+ fmt.Fprintf(w, " mean rate: %12.2f\n", m.RateMean())
+ case Timer:
+ t := metric.Snapshot()
+ ps := t.Percentiles([]float64{0.5, 0.75, 0.95, 0.99, 0.999})
+ fmt.Fprintf(w, "timer %s\n", namedMetric.name)
+ fmt.Fprintf(w, " count: %9d\n", t.Count())
+ fmt.Fprintf(w, " min: %9d\n", t.Min())
+ fmt.Fprintf(w, " max: %9d\n", t.Max())
+ fmt.Fprintf(w, " mean: %12.2f\n", t.Mean())
+ fmt.Fprintf(w, " stddev: %12.2f\n", t.StdDev())
+ fmt.Fprintf(w, " median: %12.2f\n", ps[0])
+ fmt.Fprintf(w, " 75%%: %12.2f\n", ps[1])
+ fmt.Fprintf(w, " 95%%: %12.2f\n", ps[2])
+ fmt.Fprintf(w, " 99%%: %12.2f\n", ps[3])
+ fmt.Fprintf(w, " 99.9%%: %12.2f\n", ps[4])
+ fmt.Fprintf(w, " 1-min rate: %12.2f\n", t.Rate1())
+ fmt.Fprintf(w, " 5-min rate: %12.2f\n", t.Rate5())
+ fmt.Fprintf(w, " 15-min rate: %12.2f\n", t.Rate15())
+ fmt.Fprintf(w, " mean rate: %12.2f\n", t.RateMean())
+ }
+ }
+}
+
+type namedMetric struct {
+ name string
+ m interface{}
+}
+
+// namedMetricSlice is a slice of namedMetrics that implements sort.Interface.
+type namedMetricSlice []namedMetric
+
+func (nms namedMetricSlice) Len() int { return len(nms) }
+
+func (nms namedMetricSlice) Swap(i, j int) { nms[i], nms[j] = nms[j], nms[i] }
+
+func (nms namedMetricSlice) Less(i, j int) bool {
+ return nms[i].name < nms[j].name
+}
diff --git a/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/russross/blackfriday/.gitignore b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/russross/blackfriday/.gitignore
new file mode 100644
index 00000000..75623dcc
--- /dev/null
+++ b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/russross/blackfriday/.gitignore
@@ -0,0 +1,8 @@
+*.out
+*.swp
+*.8
+*.6
+_obj
+_test*
+markdown
+tags
diff --git a/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/russross/blackfriday/.travis.yml b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/russross/blackfriday/.travis.yml
new file mode 100644
index 00000000..2f3351d7
--- /dev/null
+++ b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/russross/blackfriday/.travis.yml
@@ -0,0 +1,17 @@
+sudo: false
+language: go
+go:
+ - "1.9.x"
+ - "1.10.x"
+ - tip
+matrix:
+ fast_finish: true
+ allow_failures:
+ - go: tip
+install:
+ - # Do nothing. This is needed to prevent default install action "go get -t -v ./..." from happening here (we want it to happen inside script step).
+script:
+ - go get -t -v ./...
+ - diff -u <(echo -n) <(gofmt -d -s .)
+ - go tool vet .
+ - go test -v -race ./...
diff --git a/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/russross/blackfriday/LICENSE.txt b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/russross/blackfriday/LICENSE.txt
new file mode 100644
index 00000000..2885af36
--- /dev/null
+++ b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/russross/blackfriday/LICENSE.txt
@@ -0,0 +1,29 @@
+Blackfriday is distributed under the Simplified BSD License:
+
+> Copyright © 2011 Russ Ross
+> All rights reserved.
+>
+> Redistribution and use in source and binary forms, with or without
+> modification, are permitted provided that the following conditions
+> are met:
+>
+> 1. Redistributions of source code must retain the above copyright
+> notice, this list of conditions and the following disclaimer.
+>
+> 2. Redistributions in binary form must reproduce the above
+> copyright notice, this list of conditions and the following
+> disclaimer in the documentation and/or other materials provided with
+> the distribution.
+>
+> THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+> "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+> LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+> FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+> COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+> INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+> BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+> LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+> CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+> LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+> ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+> POSSIBILITY OF SUCH DAMAGE.
diff --git a/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/russross/blackfriday/README.md b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/russross/blackfriday/README.md
new file mode 100644
index 00000000..3c62e137
--- /dev/null
+++ b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/russross/blackfriday/README.md
@@ -0,0 +1,369 @@
+Blackfriday
+[![Build Status][BuildSVG]][BuildURL]
+[![Godoc][GodocV2SVG]][GodocV2URL]
+===========
+
+Blackfriday is a [Markdown][1] processor implemented in [Go][2]. It
+is paranoid about its input (so you can safely feed it user-supplied
+data), it is fast, it supports common extensions (tables, smart
+punctuation substitutions, etc.), and it is safe for all utf-8
+(unicode) input.
+
+HTML output is currently supported, along with Smartypants
+extensions.
+
+It started as a translation from C of [Sundown][3].
+
+
+Installation
+------------
+
+Blackfriday is compatible with any modern Go release. With Go and git installed:
+
+ go get -u gopkg.in/russross/blackfriday.v2
+
+will download, compile, and install the package into your `$GOPATH` directory
+hierarchy.
+
+
+Versions
+--------
+
+Currently maintained and recommended version of Blackfriday is `v2`. It's being
+developed on its own branch: https://github.com/russross/blackfriday/tree/v2 and the
+documentation is available at
+https://godoc.org/gopkg.in/russross/blackfriday.v2.
+
+It is `go get`-able via [gopkg.in][6] at `gopkg.in/russross/blackfriday.v2`,
+but we highly recommend using package management tool like [dep][7] or
+[Glide][8] and make use of semantic versioning. With package management you
+should import `github.com/russross/blackfriday` and specify that you're using
+version 2.0.0.
+
+Version 2 offers a number of improvements over v1:
+
+* Cleaned up API
+* A separate call to [`Parse`][4], which produces an abstract syntax tree for
+ the document
+* Latest bug fixes
+* Flexibility to easily add your own rendering extensions
+
+Potential drawbacks:
+
+* Our benchmarks show v2 to be slightly slower than v1. Currently in the
+ ballpark of around 15%.
+* API breakage. If you can't afford modifying your code to adhere to the new API
+ and don't care too much about the new features, v2 is probably not for you.
+* Several bug fixes are trailing behind and still need to be forward-ported to
+ v2. See issue [#348](https://github.com/russross/blackfriday/issues/348) for
+ tracking.
+
+If you are still interested in the legacy `v1`, you can import it from
+`github.com/russross/blackfriday`. Documentation for the legacy v1 can be found
+here: https://godoc.org/github.com/russross/blackfriday
+
+### Known issue with `dep`
+
+There is a known problem with using Blackfriday v1 _transitively_ and `dep`.
+Currently `dep` prioritizes semver versions over anything else, and picks the
+latest one, plus it does not apply a `[[constraint]]` specifier to transitively
+pulled in packages. So if you're using something that uses Blackfriday v1, but
+that something does not use `dep` yet, you will get Blackfriday v2 pulled in and
+your first dependency will fail to build.
+
+There are couple of fixes for it, documented here:
+https://github.com/golang/dep/blob/master/docs/FAQ.md#how-do-i-constrain-a-transitive-dependencys-version
+
+Meanwhile, `dep` team is working on a more general solution to the constraints
+on transitive dependencies problem: https://github.com/golang/dep/issues/1124.
+
+
+Usage
+-----
+
+### v1
+
+For basic usage, it is as simple as getting your input into a byte
+slice and calling:
+
+ output := blackfriday.MarkdownBasic(input)
+
+This renders it with no extensions enabled. To get a more useful
+feature set, use this instead:
+
+ output := blackfriday.MarkdownCommon(input)
+
+### v2
+
+For the most sensible markdown processing, it is as simple as getting your input
+into a byte slice and calling:
+
+```go
+output := blackfriday.Run(input)
+```
+
+Your input will be parsed and the output rendered with a set of most popular
+extensions enabled. If you want the most basic feature set, corresponding with
+the bare Markdown specification, use:
+
+```go
+output := blackfriday.Run(input, blackfriday.WithNoExtensions())
+```
+
+### Sanitize untrusted content
+
+Blackfriday itself does nothing to protect against malicious content. If you are
+dealing with user-supplied markdown, we recommend running Blackfriday's output
+through HTML sanitizer such as [Bluemonday][5].
+
+Here's an example of simple usage of Blackfriday together with Bluemonday:
+
+```go
+import (
+ "github.com/microcosm-cc/bluemonday"
+ "gopkg.in/russross/blackfriday.v2"
+)
+
+// ...
+unsafe := blackfriday.Run(input)
+html := bluemonday.UGCPolicy().SanitizeBytes(unsafe)
+```
+
+### Custom options, v1
+
+If you want to customize the set of options, first get a renderer
+(currently only the HTML output engine), then use it to
+call the more general `Markdown` function. For examples, see the
+implementations of `MarkdownBasic` and `MarkdownCommon` in
+`markdown.go`.
+
+### Custom options, v2
+
+If you want to customize the set of options, use `blackfriday.WithExtensions`,
+`blackfriday.WithRenderer` and `blackfriday.WithRefOverride`.
+
+### `blackfriday-tool`
+
+You can also check out `blackfriday-tool` for a more complete example
+of how to use it. Download and install it using:
+
+ go get github.com/russross/blackfriday-tool
+
+This is a simple command-line tool that allows you to process a
+markdown file using a standalone program. You can also browse the
+source directly on github if you are just looking for some example
+code:
+
+*
+
+Note that if you have not already done so, installing
+`blackfriday-tool` will be sufficient to download and install
+blackfriday in addition to the tool itself. The tool binary will be
+installed in `$GOPATH/bin`. This is a statically-linked binary that
+can be copied to wherever you need it without worrying about
+dependencies and library versions.
+
+### Sanitized anchor names
+
+Blackfriday includes an algorithm for creating sanitized anchor names
+corresponding to a given input text. This algorithm is used to create
+anchors for headings when `EXTENSION_AUTO_HEADER_IDS` is enabled. The
+algorithm has a specification, so that other packages can create
+compatible anchor names and links to those anchors.
+
+The specification is located at https://godoc.org/github.com/russross/blackfriday#hdr-Sanitized_Anchor_Names.
+
+[`SanitizedAnchorName`](https://godoc.org/github.com/russross/blackfriday#SanitizedAnchorName) exposes this functionality, and can be used to
+create compatible links to the anchor names generated by blackfriday.
+This algorithm is also implemented in a small standalone package at
+[`github.com/shurcooL/sanitized_anchor_name`](https://godoc.org/github.com/shurcooL/sanitized_anchor_name). It can be useful for clients
+that want a small package and don't need full functionality of blackfriday.
+
+
+Features
+--------
+
+All features of Sundown are supported, including:
+
+* **Compatibility**. The Markdown v1.0.3 test suite passes with
+ the `--tidy` option. Without `--tidy`, the differences are
+ mostly in whitespace and entity escaping, where blackfriday is
+ more consistent and cleaner.
+
+* **Common extensions**, including table support, fenced code
+ blocks, autolinks, strikethroughs, non-strict emphasis, etc.
+
+* **Safety**. Blackfriday is paranoid when parsing, making it safe
+ to feed untrusted user input without fear of bad things
+ happening. The test suite stress tests this and there are no
+ known inputs that make it crash. If you find one, please let me
+ know and send me the input that does it.
+
+ NOTE: "safety" in this context means *runtime safety only*. In order to
+ protect yourself against JavaScript injection in untrusted content, see
+ [this example](https://github.com/russross/blackfriday#sanitize-untrusted-content).
+
+* **Fast processing**. It is fast enough to render on-demand in
+ most web applications without having to cache the output.
+
+* **Thread safety**. You can run multiple parsers in different
+ goroutines without ill effect. There is no dependence on global
+ shared state.
+
+* **Minimal dependencies**. Blackfriday only depends on standard
+ library packages in Go. The source code is pretty
+ self-contained, so it is easy to add to any project, including
+ Google App Engine projects.
+
+* **Standards compliant**. Output successfully validates using the
+ W3C validation tool for HTML 4.01 and XHTML 1.0 Transitional.
+
+
+Extensions
+----------
+
+In addition to the standard markdown syntax, this package
+implements the following extensions:
+
+* **Intra-word emphasis supression**. The `_` character is
+ commonly used inside words when discussing code, so having
+ markdown interpret it as an emphasis command is usually the
+ wrong thing. Blackfriday lets you treat all emphasis markers as
+ normal characters when they occur inside a word.
+
+* **Tables**. Tables can be created by drawing them in the input
+ using a simple syntax:
+
+ ```
+ Name | Age
+ --------|------
+ Bob | 27
+ Alice | 23
+ ```
+
+* **Fenced code blocks**. In addition to the normal 4-space
+ indentation to mark code blocks, you can explicitly mark them
+ and supply a language (to make syntax highlighting simple). Just
+ mark it like this:
+
+ ``` go
+ func getTrue() bool {
+ return true
+ }
+ ```
+
+ You can use 3 or more backticks to mark the beginning of the
+ block, and the same number to mark the end of the block.
+
+ To preserve classes of fenced code blocks while using the bluemonday
+ HTML sanitizer, use the following policy:
+
+ ``` go
+ p := bluemonday.UGCPolicy()
+ p.AllowAttrs("class").Matching(regexp.MustCompile("^language-[a-zA-Z0-9]+$")).OnElements("code")
+ html := p.SanitizeBytes(unsafe)
+ ```
+
+* **Definition lists**. A simple definition list is made of a single-line
+ term followed by a colon and the definition for that term.
+
+ Cat
+ : Fluffy animal everyone likes
+
+ Internet
+ : Vector of transmission for pictures of cats
+
+ Terms must be separated from the previous definition by a blank line.
+
+* **Footnotes**. A marker in the text that will become a superscript number;
+ a footnote definition that will be placed in a list of footnotes at the
+ end of the document. A footnote looks like this:
+
+ This is a footnote.[^1]
+
+ [^1]: the footnote text.
+
+* **Autolinking**. Blackfriday can find URLs that have not been
+ explicitly marked as links and turn them into links.
+
+* **Strikethrough**. Use two tildes (`~~`) to mark text that
+ should be crossed out.
+
+* **Hard line breaks**. With this extension enabled (it is off by
+ default in the `MarkdownBasic` and `MarkdownCommon` convenience
+ functions), newlines in the input translate into line breaks in
+ the output.
+
+* **Smart quotes**. Smartypants-style punctuation substitution is
+ supported, turning normal double- and single-quote marks into
+ curly quotes, etc.
+
+* **LaTeX-style dash parsing** is an additional option, where `--`
+ is translated into `–`, and `---` is translated into
+ `—`. This differs from most smartypants processors, which
+ turn a single hyphen into an ndash and a double hyphen into an
+ mdash.
+
+* **Smart fractions**, where anything that looks like a fraction
+ is translated into suitable HTML (instead of just a few special
+ cases like most smartypant processors). For example, `4/5`
+ becomes `4⁄5`, which renders as
+ 4⁄5.
+
+
+Other renderers
+---------------
+
+Blackfriday is structured to allow alternative rendering engines. Here
+are a few of note:
+
+* [github_flavored_markdown](https://godoc.org/github.com/shurcooL/github_flavored_markdown):
+ provides a GitHub Flavored Markdown renderer with fenced code block
+ highlighting, clickable heading anchor links.
+
+ It's not customizable, and its goal is to produce HTML output
+ equivalent to the [GitHub Markdown API endpoint](https://developer.github.com/v3/markdown/#render-a-markdown-document-in-raw-mode),
+ except the rendering is performed locally.
+
+* [markdownfmt](https://github.com/shurcooL/markdownfmt): like gofmt,
+ but for markdown.
+
+* [LaTeX output](https://bitbucket.org/ambrevar/blackfriday-latex):
+ renders output as LaTeX.
+
+* [bfchroma](https://github.com/Depado/bfchroma/): provides convenience
+ integration with the [Chroma](https://github.com/alecthomas/chroma) code
+ highlighting library. bfchroma is only compatible with v2 of Blackfriday and
+ provides a drop-in renderer ready to use with Blackfriday, as well as
+ options and means for further customization.
+
+
+TODO
+----
+
+* More unit testing
+* Improve Unicode support. It does not understand all Unicode
+ rules (about what constitutes a letter, a punctuation symbol,
+ etc.), so it may fail to detect word boundaries correctly in
+ some instances. It is safe on all UTF-8 input.
+
+
+License
+-------
+
+[Blackfriday is distributed under the Simplified BSD License](LICENSE.txt)
+
+
+ [1]: https://daringfireball.net/projects/markdown/ "Markdown"
+ [2]: https://golang.org/ "Go Language"
+ [3]: https://github.com/vmg/sundown "Sundown"
+ [4]: https://godoc.org/gopkg.in/russross/blackfriday.v2#Parse "Parse func"
+ [5]: https://github.com/microcosm-cc/bluemonday "Bluemonday"
+ [6]: https://labix.org/gopkg.in "gopkg.in"
+ [7]: https://github.com/golang/dep/ "dep"
+ [8]: https://github.com/Masterminds/glide "Glide"
+
+ [BuildSVG]: https://travis-ci.org/russross/blackfriday.svg?branch=master
+ [BuildURL]: https://travis-ci.org/russross/blackfriday
+ [GodocV2SVG]: https://godoc.org/gopkg.in/russross/blackfriday.v2?status.svg
+ [GodocV2URL]: https://godoc.org/gopkg.in/russross/blackfriday.v2
diff --git a/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/russross/blackfriday/block.go b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/russross/blackfriday/block.go
new file mode 100644
index 00000000..45c21a6c
--- /dev/null
+++ b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/russross/blackfriday/block.go
@@ -0,0 +1,1474 @@
+//
+// Blackfriday Markdown Processor
+// Available at http://github.com/russross/blackfriday
+//
+// Copyright © 2011 Russ Ross .
+// Distributed under the Simplified BSD License.
+// See README.md for details.
+//
+
+//
+// Functions to parse block-level elements.
+//
+
+package blackfriday
+
+import (
+ "bytes"
+ "strings"
+ "unicode"
+)
+
+// Parse block-level data.
+// Note: this function and many that it calls assume that
+// the input buffer ends with a newline.
+func (p *parser) block(out *bytes.Buffer, data []byte) {
+ if len(data) == 0 || data[len(data)-1] != '\n' {
+ panic("block input is missing terminating newline")
+ }
+
+ // this is called recursively: enforce a maximum depth
+ if p.nesting >= p.maxNesting {
+ return
+ }
+ p.nesting++
+
+ // parse out one block-level construct at a time
+ for len(data) > 0 {
+ // prefixed header:
+ //
+ // # Header 1
+ // ## Header 2
+ // ...
+ // ###### Header 6
+ if p.isPrefixHeader(data) {
+ data = data[p.prefixHeader(out, data):]
+ continue
+ }
+
+ // block of preformatted HTML:
+ //
+ //
+ // ...
+ //
+ if data[0] == '<' {
+ if i := p.html(out, data, true); i > 0 {
+ data = data[i:]
+ continue
+ }
+ }
+
+ // title block
+ //
+ // % stuff
+ // % more stuff
+ // % even more stuff
+ if p.flags&EXTENSION_TITLEBLOCK != 0 {
+ if data[0] == '%' {
+ if i := p.titleBlock(out, data, true); i > 0 {
+ data = data[i:]
+ continue
+ }
+ }
+ }
+
+ // blank lines. note: returns the # of bytes to skip
+ if i := p.isEmpty(data); i > 0 {
+ data = data[i:]
+ continue
+ }
+
+ // indented code block:
+ //
+ // func max(a, b int) int {
+ // if a > b {
+ // return a
+ // }
+ // return b
+ // }
+ if p.codePrefix(data) > 0 {
+ data = data[p.code(out, data):]
+ continue
+ }
+
+ // fenced code block:
+ //
+ // ``` go info string here
+ // func fact(n int) int {
+ // if n <= 1 {
+ // return n
+ // }
+ // return n * fact(n-1)
+ // }
+ // ```
+ if p.flags&EXTENSION_FENCED_CODE != 0 {
+ if i := p.fencedCodeBlock(out, data, true); i > 0 {
+ data = data[i:]
+ continue
+ }
+ }
+
+ // horizontal rule:
+ //
+ // ------
+ // or
+ // ******
+ // or
+ // ______
+ if p.isHRule(data) {
+ p.r.HRule(out)
+ var i int
+ for i = 0; data[i] != '\n'; i++ {
+ }
+ data = data[i:]
+ continue
+ }
+
+ // block quote:
+ //
+ // > A big quote I found somewhere
+ // > on the web
+ if p.quotePrefix(data) > 0 {
+ data = data[p.quote(out, data):]
+ continue
+ }
+
+ // table:
+ //
+ // Name | Age | Phone
+ // ------|-----|---------
+ // Bob | 31 | 555-1234
+ // Alice | 27 | 555-4321
+ if p.flags&EXTENSION_TABLES != 0 {
+ if i := p.table(out, data); i > 0 {
+ data = data[i:]
+ continue
+ }
+ }
+
+ // an itemized/unordered list:
+ //
+ // * Item 1
+ // * Item 2
+ //
+ // also works with + or -
+ if p.uliPrefix(data) > 0 {
+ data = data[p.list(out, data, 0):]
+ continue
+ }
+
+ // a numbered/ordered list:
+ //
+ // 1. Item 1
+ // 2. Item 2
+ if p.oliPrefix(data) > 0 {
+ data = data[p.list(out, data, LIST_TYPE_ORDERED):]
+ continue
+ }
+
+ // definition lists:
+ //
+ // Term 1
+ // : Definition a
+ // : Definition b
+ //
+ // Term 2
+ // : Definition c
+ if p.flags&EXTENSION_DEFINITION_LISTS != 0 {
+ if p.dliPrefix(data) > 0 {
+ data = data[p.list(out, data, LIST_TYPE_DEFINITION):]
+ continue
+ }
+ }
+
+ // anything else must look like a normal paragraph
+ // note: this finds underlined headers, too
+ data = data[p.paragraph(out, data):]
+ }
+
+ p.nesting--
+}
+
+func (p *parser) isPrefixHeader(data []byte) bool {
+ if data[0] != '#' {
+ return false
+ }
+
+ if p.flags&EXTENSION_SPACE_HEADERS != 0 {
+ level := 0
+ for level < 6 && data[level] == '#' {
+ level++
+ }
+ if data[level] != ' ' {
+ return false
+ }
+ }
+ return true
+}
+
+func (p *parser) prefixHeader(out *bytes.Buffer, data []byte) int {
+ level := 0
+ for level < 6 && data[level] == '#' {
+ level++
+ }
+ i := skipChar(data, level, ' ')
+ end := skipUntilChar(data, i, '\n')
+ skip := end
+ id := ""
+ if p.flags&EXTENSION_HEADER_IDS != 0 {
+ j, k := 0, 0
+ // find start/end of header id
+ for j = i; j < end-1 && (data[j] != '{' || data[j+1] != '#'); j++ {
+ }
+ for k = j + 1; k < end && data[k] != '}'; k++ {
+ }
+ // extract header id iff found
+ if j < end && k < end {
+ id = string(data[j+2 : k])
+ end = j
+ skip = k + 1
+ for end > 0 && data[end-1] == ' ' {
+ end--
+ }
+ }
+ }
+ for end > 0 && data[end-1] == '#' {
+ if isBackslashEscaped(data, end-1) {
+ break
+ }
+ end--
+ }
+ for end > 0 && data[end-1] == ' ' {
+ end--
+ }
+ if end > i {
+ if id == "" && p.flags&EXTENSION_AUTO_HEADER_IDS != 0 {
+ id = SanitizedAnchorName(string(data[i:end]))
+ }
+ work := func() bool {
+ p.inline(out, data[i:end])
+ return true
+ }
+ p.r.Header(out, work, level, id)
+ }
+ return skip
+}
+
+func (p *parser) isUnderlinedHeader(data []byte) int {
+ // test of level 1 header
+ if data[0] == '=' {
+ i := skipChar(data, 1, '=')
+ i = skipChar(data, i, ' ')
+ if data[i] == '\n' {
+ return 1
+ } else {
+ return 0
+ }
+ }
+
+ // test of level 2 header
+ if data[0] == '-' {
+ i := skipChar(data, 1, '-')
+ i = skipChar(data, i, ' ')
+ if data[i] == '\n' {
+ return 2
+ } else {
+ return 0
+ }
+ }
+
+ return 0
+}
+
+func (p *parser) titleBlock(out *bytes.Buffer, data []byte, doRender bool) int {
+ if data[0] != '%' {
+ return 0
+ }
+ splitData := bytes.Split(data, []byte("\n"))
+ var i int
+ for idx, b := range splitData {
+ if !bytes.HasPrefix(b, []byte("%")) {
+ i = idx // - 1
+ break
+ }
+ }
+
+ data = bytes.Join(splitData[0:i], []byte("\n"))
+ p.r.TitleBlock(out, data)
+
+ return len(data)
+}
+
+func (p *parser) html(out *bytes.Buffer, data []byte, doRender bool) int {
+ var i, j int
+
+ // identify the opening tag
+ if data[0] != '<' {
+ return 0
+ }
+ curtag, tagfound := p.htmlFindTag(data[1:])
+
+ // handle special cases
+ if !tagfound {
+ // check for an HTML comment
+ if size := p.htmlComment(out, data, doRender); size > 0 {
+ return size
+ }
+
+ // check for an
tag
+ if size := p.htmlHr(out, data, doRender); size > 0 {
+ return size
+ }
+
+ // check for HTML CDATA
+ if size := p.htmlCDATA(out, data, doRender); size > 0 {
+ return size
+ }
+
+ // no special case recognized
+ return 0
+ }
+
+ // look for an unindented matching closing tag
+ // followed by a blank line
+ found := false
+ /*
+ closetag := []byte("\n")
+ j = len(curtag) + 1
+ for !found {
+ // scan for a closing tag at the beginning of a line
+ if skip := bytes.Index(data[j:], closetag); skip >= 0 {
+ j += skip + len(closetag)
+ } else {
+ break
+ }
+
+ // see if it is the only thing on the line
+ if skip := p.isEmpty(data[j:]); skip > 0 {
+ // see if it is followed by a blank line/eof
+ j += skip
+ if j >= len(data) {
+ found = true
+ i = j
+ } else {
+ if skip := p.isEmpty(data[j:]); skip > 0 {
+ j += skip
+ found = true
+ i = j
+ }
+ }
+ }
+ }
+ */
+
+ // if not found, try a second pass looking for indented match
+ // but not if tag is "ins" or "del" (following original Markdown.pl)
+ if !found && curtag != "ins" && curtag != "del" {
+ i = 1
+ for i < len(data) {
+ i++
+ for i < len(data) && !(data[i-1] == '<' && data[i] == '/') {
+ i++
+ }
+
+ if i+2+len(curtag) >= len(data) {
+ break
+ }
+
+ j = p.htmlFindEnd(curtag, data[i-1:])
+
+ if j > 0 {
+ i += j - 1
+ found = true
+ break
+ }
+ }
+ }
+
+ if !found {
+ return 0
+ }
+
+ // the end of the block has been found
+ if doRender {
+ // trim newlines
+ end := i
+ for end > 0 && data[end-1] == '\n' {
+ end--
+ }
+ p.r.BlockHtml(out, data[:end])
+ }
+
+ return i
+}
+
+func (p *parser) renderHTMLBlock(out *bytes.Buffer, data []byte, start int, doRender bool) int {
+ // html block needs to end with a blank line
+ if i := p.isEmpty(data[start:]); i > 0 {
+ size := start + i
+ if doRender {
+ // trim trailing newlines
+ end := size
+ for end > 0 && data[end-1] == '\n' {
+ end--
+ }
+ p.r.BlockHtml(out, data[:end])
+ }
+ return size
+ }
+ return 0
+}
+
+// HTML comment, lax form
+func (p *parser) htmlComment(out *bytes.Buffer, data []byte, doRender bool) int {
+ i := p.inlineHTMLComment(out, data)
+ return p.renderHTMLBlock(out, data, i, doRender)
+}
+
+// HTML CDATA section
+func (p *parser) htmlCDATA(out *bytes.Buffer, data []byte, doRender bool) int {
+ const cdataTag = "') {
+ i++
+ }
+ i++
+ // no end-of-comment marker
+ if i >= len(data) {
+ return 0
+ }
+ return p.renderHTMLBlock(out, data, i, doRender)
+}
+
+// HR, which is the only self-closing block tag considered
+func (p *parser) htmlHr(out *bytes.Buffer, data []byte, doRender bool) int {
+ if data[0] != '<' || (data[1] != 'h' && data[1] != 'H') || (data[2] != 'r' && data[2] != 'R') {
+ return 0
+ }
+ if data[3] != ' ' && data[3] != '/' && data[3] != '>' {
+ // not an
tag after all; at least not a valid one
+ return 0
+ }
+
+ i := 3
+ for data[i] != '>' && data[i] != '\n' {
+ i++
+ }
+
+ if data[i] == '>' {
+ return p.renderHTMLBlock(out, data, i+1, doRender)
+ }
+
+ return 0
+}
+
+func (p *parser) htmlFindTag(data []byte) (string, bool) {
+ i := 0
+ for isalnum(data[i]) {
+ i++
+ }
+ key := string(data[:i])
+ if _, ok := blockTags[key]; ok {
+ return key, true
+ }
+ return "", false
+}
+
+func (p *parser) htmlFindEnd(tag string, data []byte) int {
+ // assume data[0] == '<' && data[1] == '/' already tested
+
+ // check if tag is a match
+ closetag := []byte("")
+ if !bytes.HasPrefix(data, closetag) {
+ return 0
+ }
+ i := len(closetag)
+
+ // check that the rest of the line is blank
+ skip := 0
+ if skip = p.isEmpty(data[i:]); skip == 0 {
+ return 0
+ }
+ i += skip
+ skip = 0
+
+ if i >= len(data) {
+ return i
+ }
+
+ if p.flags&EXTENSION_LAX_HTML_BLOCKS != 0 {
+ return i
+ }
+ if skip = p.isEmpty(data[i:]); skip == 0 {
+ // following line must be blank
+ return 0
+ }
+
+ return i + skip
+}
+
+func (*parser) isEmpty(data []byte) int {
+ // it is okay to call isEmpty on an empty buffer
+ if len(data) == 0 {
+ return 0
+ }
+
+ var i int
+ for i = 0; i < len(data) && data[i] != '\n'; i++ {
+ if data[i] != ' ' && data[i] != '\t' {
+ return 0
+ }
+ }
+ return i + 1
+}
+
+func (*parser) isHRule(data []byte) bool {
+ i := 0
+
+ // skip up to three spaces
+ for i < 3 && data[i] == ' ' {
+ i++
+ }
+
+ // look at the hrule char
+ if data[i] != '*' && data[i] != '-' && data[i] != '_' {
+ return false
+ }
+ c := data[i]
+
+ // the whole line must be the char or whitespace
+ n := 0
+ for data[i] != '\n' {
+ switch {
+ case data[i] == c:
+ n++
+ case data[i] != ' ':
+ return false
+ }
+ i++
+ }
+
+ return n >= 3
+}
+
+// isFenceLine checks if there's a fence line (e.g., ``` or ``` go) at the beginning of data,
+// and returns the end index if so, or 0 otherwise. It also returns the marker found.
+// If syntax is not nil, it gets set to the syntax specified in the fence line.
+// A final newline is mandatory to recognize the fence line, unless newlineOptional is true.
+func isFenceLine(data []byte, info *string, oldmarker string, newlineOptional bool) (end int, marker string) {
+ i, size := 0, 0
+
+ // skip up to three spaces
+ for i < len(data) && i < 3 && data[i] == ' ' {
+ i++
+ }
+
+ // check for the marker characters: ~ or `
+ if i >= len(data) {
+ return 0, ""
+ }
+ if data[i] != '~' && data[i] != '`' {
+ return 0, ""
+ }
+
+ c := data[i]
+
+ // the whole line must be the same char or whitespace
+ for i < len(data) && data[i] == c {
+ size++
+ i++
+ }
+
+ // the marker char must occur at least 3 times
+ if size < 3 {
+ return 0, ""
+ }
+ marker = string(data[i-size : i])
+
+ // if this is the end marker, it must match the beginning marker
+ if oldmarker != "" && marker != oldmarker {
+ return 0, ""
+ }
+
+ // TODO(shurcooL): It's probably a good idea to simplify the 2 code paths here
+ // into one, always get the info string, and discard it if the caller doesn't care.
+ if info != nil {
+ infoLength := 0
+ i = skipChar(data, i, ' ')
+
+ if i >= len(data) {
+ if newlineOptional && i == len(data) {
+ return i, marker
+ }
+ return 0, ""
+ }
+
+ infoStart := i
+
+ if data[i] == '{' {
+ i++
+ infoStart++
+
+ for i < len(data) && data[i] != '}' && data[i] != '\n' {
+ infoLength++
+ i++
+ }
+
+ if i >= len(data) || data[i] != '}' {
+ return 0, ""
+ }
+
+ // strip all whitespace at the beginning and the end
+ // of the {} block
+ for infoLength > 0 && isspace(data[infoStart]) {
+ infoStart++
+ infoLength--
+ }
+
+ for infoLength > 0 && isspace(data[infoStart+infoLength-1]) {
+ infoLength--
+ }
+
+ i++
+ } else {
+ for i < len(data) && !isverticalspace(data[i]) {
+ infoLength++
+ i++
+ }
+ }
+
+ *info = strings.TrimSpace(string(data[infoStart : infoStart+infoLength]))
+ }
+
+ i = skipChar(data, i, ' ')
+ if i >= len(data) || data[i] != '\n' {
+ if newlineOptional && i == len(data) {
+ return i, marker
+ }
+ return 0, ""
+ }
+
+ return i + 1, marker // Take newline into account.
+}
+
+// fencedCodeBlock returns the end index if data contains a fenced code block at the beginning,
+// or 0 otherwise. It writes to out if doRender is true, otherwise it has no side effects.
+// If doRender is true, a final newline is mandatory to recognize the fenced code block.
+func (p *parser) fencedCodeBlock(out *bytes.Buffer, data []byte, doRender bool) int {
+ var infoString string
+ beg, marker := isFenceLine(data, &infoString, "", false)
+ if beg == 0 || beg >= len(data) {
+ return 0
+ }
+
+ var work bytes.Buffer
+
+ for {
+ // safe to assume beg < len(data)
+
+ // check for the end of the code block
+ newlineOptional := !doRender
+ fenceEnd, _ := isFenceLine(data[beg:], nil, marker, newlineOptional)
+ if fenceEnd != 0 {
+ beg += fenceEnd
+ break
+ }
+
+ // copy the current line
+ end := skipUntilChar(data, beg, '\n') + 1
+
+ // did we reach the end of the buffer without a closing marker?
+ if end >= len(data) {
+ return 0
+ }
+
+ // verbatim copy to the working buffer
+ if doRender {
+ work.Write(data[beg:end])
+ }
+ beg = end
+ }
+
+ if doRender {
+ p.r.BlockCode(out, work.Bytes(), infoString)
+ }
+
+ return beg
+}
+
+func (p *parser) table(out *bytes.Buffer, data []byte) int {
+ var header bytes.Buffer
+ i, columns := p.tableHeader(&header, data)
+ if i == 0 {
+ return 0
+ }
+
+ var body bytes.Buffer
+
+ for i < len(data) {
+ pipes, rowStart := 0, i
+ for ; data[i] != '\n'; i++ {
+ if data[i] == '|' {
+ pipes++
+ }
+ }
+
+ if pipes == 0 {
+ i = rowStart
+ break
+ }
+
+ // include the newline in data sent to tableRow
+ i++
+ p.tableRow(&body, data[rowStart:i], columns, false)
+ }
+
+ p.r.Table(out, header.Bytes(), body.Bytes(), columns)
+
+ return i
+}
+
+// check if the specified position is preceded by an odd number of backslashes
+func isBackslashEscaped(data []byte, i int) bool {
+ backslashes := 0
+ for i-backslashes-1 >= 0 && data[i-backslashes-1] == '\\' {
+ backslashes++
+ }
+ return backslashes&1 == 1
+}
+
+func (p *parser) tableHeader(out *bytes.Buffer, data []byte) (size int, columns []int) {
+ i := 0
+ colCount := 1
+ for i = 0; data[i] != '\n'; i++ {
+ if data[i] == '|' && !isBackslashEscaped(data, i) {
+ colCount++
+ }
+ }
+
+ // doesn't look like a table header
+ if colCount == 1 {
+ return
+ }
+
+ // include the newline in the data sent to tableRow
+ header := data[:i+1]
+
+ // column count ignores pipes at beginning or end of line
+ if data[0] == '|' {
+ colCount--
+ }
+ if i > 2 && data[i-1] == '|' && !isBackslashEscaped(data, i-1) {
+ colCount--
+ }
+
+ columns = make([]int, colCount)
+
+ // move on to the header underline
+ i++
+ if i >= len(data) {
+ return
+ }
+
+ if data[i] == '|' && !isBackslashEscaped(data, i) {
+ i++
+ }
+ i = skipChar(data, i, ' ')
+
+ // each column header is of form: / *:?-+:? *|/ with # dashes + # colons >= 3
+ // and trailing | optional on last column
+ col := 0
+ for data[i] != '\n' {
+ dashes := 0
+
+ if data[i] == ':' {
+ i++
+ columns[col] |= TABLE_ALIGNMENT_LEFT
+ dashes++
+ }
+ for data[i] == '-' {
+ i++
+ dashes++
+ }
+ if data[i] == ':' {
+ i++
+ columns[col] |= TABLE_ALIGNMENT_RIGHT
+ dashes++
+ }
+ for data[i] == ' ' {
+ i++
+ }
+
+ // end of column test is messy
+ switch {
+ case dashes < 3:
+ // not a valid column
+ return
+
+ case data[i] == '|' && !isBackslashEscaped(data, i):
+ // marker found, now skip past trailing whitespace
+ col++
+ i++
+ for data[i] == ' ' {
+ i++
+ }
+
+ // trailing junk found after last column
+ if col >= colCount && data[i] != '\n' {
+ return
+ }
+
+ case (data[i] != '|' || isBackslashEscaped(data, i)) && col+1 < colCount:
+ // something else found where marker was required
+ return
+
+ case data[i] == '\n':
+ // marker is optional for the last column
+ col++
+
+ default:
+ // trailing junk found after last column
+ return
+ }
+ }
+ if col != colCount {
+ return
+ }
+
+ p.tableRow(out, header, columns, true)
+ size = i + 1
+ return
+}
+
+func (p *parser) tableRow(out *bytes.Buffer, data []byte, columns []int, header bool) {
+ i, col := 0, 0
+ var rowWork bytes.Buffer
+
+ if data[i] == '|' && !isBackslashEscaped(data, i) {
+ i++
+ }
+
+ for col = 0; col < len(columns) && i < len(data); col++ {
+ for data[i] == ' ' {
+ i++
+ }
+
+ cellStart := i
+
+ for (data[i] != '|' || isBackslashEscaped(data, i)) && data[i] != '\n' {
+ i++
+ }
+
+ cellEnd := i
+
+ // skip the end-of-cell marker, possibly taking us past end of buffer
+ i++
+
+ for cellEnd > cellStart && data[cellEnd-1] == ' ' {
+ cellEnd--
+ }
+
+ var cellWork bytes.Buffer
+ p.inline(&cellWork, data[cellStart:cellEnd])
+
+ if header {
+ p.r.TableHeaderCell(&rowWork, cellWork.Bytes(), columns[col])
+ } else {
+ p.r.TableCell(&rowWork, cellWork.Bytes(), columns[col])
+ }
+ }
+
+ // pad it out with empty columns to get the right number
+ for ; col < len(columns); col++ {
+ if header {
+ p.r.TableHeaderCell(&rowWork, nil, columns[col])
+ } else {
+ p.r.TableCell(&rowWork, nil, columns[col])
+ }
+ }
+
+ // silently ignore rows with too many cells
+
+ p.r.TableRow(out, rowWork.Bytes())
+}
+
+// returns blockquote prefix length
+func (p *parser) quotePrefix(data []byte) int {
+ i := 0
+ for i < 3 && data[i] == ' ' {
+ i++
+ }
+ if data[i] == '>' {
+ if data[i+1] == ' ' {
+ return i + 2
+ }
+ return i + 1
+ }
+ return 0
+}
+
+// blockquote ends with at least one blank line
+// followed by something without a blockquote prefix
+func (p *parser) terminateBlockquote(data []byte, beg, end int) bool {
+ if p.isEmpty(data[beg:]) <= 0 {
+ return false
+ }
+ if end >= len(data) {
+ return true
+ }
+ return p.quotePrefix(data[end:]) == 0 && p.isEmpty(data[end:]) == 0
+}
+
+// parse a blockquote fragment
+func (p *parser) quote(out *bytes.Buffer, data []byte) int {
+ var raw bytes.Buffer
+ beg, end := 0, 0
+ for beg < len(data) {
+ end = beg
+ // Step over whole lines, collecting them. While doing that, check for
+ // fenced code and if one's found, incorporate it altogether,
+ // irregardless of any contents inside it
+ for data[end] != '\n' {
+ if p.flags&EXTENSION_FENCED_CODE != 0 {
+ if i := p.fencedCodeBlock(out, data[end:], false); i > 0 {
+ // -1 to compensate for the extra end++ after the loop:
+ end += i - 1
+ break
+ }
+ }
+ end++
+ }
+ end++
+
+ if pre := p.quotePrefix(data[beg:]); pre > 0 {
+ // skip the prefix
+ beg += pre
+ } else if p.terminateBlockquote(data, beg, end) {
+ break
+ }
+
+ // this line is part of the blockquote
+ raw.Write(data[beg:end])
+ beg = end
+ }
+
+ var cooked bytes.Buffer
+ p.block(&cooked, raw.Bytes())
+ p.r.BlockQuote(out, cooked.Bytes())
+ return end
+}
+
+// returns prefix length for block code
+func (p *parser) codePrefix(data []byte) int {
+ if data[0] == ' ' && data[1] == ' ' && data[2] == ' ' && data[3] == ' ' {
+ return 4
+ }
+ return 0
+}
+
+func (p *parser) code(out *bytes.Buffer, data []byte) int {
+ var work bytes.Buffer
+
+ i := 0
+ for i < len(data) {
+ beg := i
+ for data[i] != '\n' {
+ i++
+ }
+ i++
+
+ blankline := p.isEmpty(data[beg:i]) > 0
+ if pre := p.codePrefix(data[beg:i]); pre > 0 {
+ beg += pre
+ } else if !blankline {
+ // non-empty, non-prefixed line breaks the pre
+ i = beg
+ break
+ }
+
+ // verbatim copy to the working buffeu
+ if blankline {
+ work.WriteByte('\n')
+ } else {
+ work.Write(data[beg:i])
+ }
+ }
+
+ // trim all the \n off the end of work
+ workbytes := work.Bytes()
+ eol := len(workbytes)
+ for eol > 0 && workbytes[eol-1] == '\n' {
+ eol--
+ }
+ if eol != len(workbytes) {
+ work.Truncate(eol)
+ }
+
+ work.WriteByte('\n')
+
+ p.r.BlockCode(out, work.Bytes(), "")
+
+ return i
+}
+
+// returns unordered list item prefix
+func (p *parser) uliPrefix(data []byte) int {
+ i := 0
+
+ // start with up to 3 spaces
+ for i < 3 && data[i] == ' ' {
+ i++
+ }
+
+ // need a *, +, or - followed by a space
+ if (data[i] != '*' && data[i] != '+' && data[i] != '-') ||
+ data[i+1] != ' ' {
+ return 0
+ }
+ return i + 2
+}
+
+// returns ordered list item prefix
+func (p *parser) oliPrefix(data []byte) int {
+ i := 0
+
+ // start with up to 3 spaces
+ for i < 3 && data[i] == ' ' {
+ i++
+ }
+
+ // count the digits
+ start := i
+ for data[i] >= '0' && data[i] <= '9' {
+ i++
+ }
+
+ // we need >= 1 digits followed by a dot and a space
+ if start == i || data[i] != '.' || data[i+1] != ' ' {
+ return 0
+ }
+ return i + 2
+}
+
+// returns definition list item prefix
+func (p *parser) dliPrefix(data []byte) int {
+ i := 0
+
+ // need a : followed by a spaces
+ if data[i] != ':' || data[i+1] != ' ' {
+ return 0
+ }
+ for data[i] == ' ' {
+ i++
+ }
+ return i + 2
+}
+
+// parse ordered or unordered list block
+func (p *parser) list(out *bytes.Buffer, data []byte, flags int) int {
+ i := 0
+ flags |= LIST_ITEM_BEGINNING_OF_LIST
+ work := func() bool {
+ for i < len(data) {
+ skip := p.listItem(out, data[i:], &flags)
+ i += skip
+
+ if skip == 0 || flags&LIST_ITEM_END_OF_LIST != 0 {
+ break
+ }
+ flags &= ^LIST_ITEM_BEGINNING_OF_LIST
+ }
+ return true
+ }
+
+ p.r.List(out, work, flags)
+ return i
+}
+
+// Parse a single list item.
+// Assumes initial prefix is already removed if this is a sublist.
+func (p *parser) listItem(out *bytes.Buffer, data []byte, flags *int) int {
+ // keep track of the indentation of the first line
+ itemIndent := 0
+ for itemIndent < 3 && data[itemIndent] == ' ' {
+ itemIndent++
+ }
+
+ i := p.uliPrefix(data)
+ if i == 0 {
+ i = p.oliPrefix(data)
+ }
+ if i == 0 {
+ i = p.dliPrefix(data)
+ // reset definition term flag
+ if i > 0 {
+ *flags &= ^LIST_TYPE_TERM
+ }
+ }
+ if i == 0 {
+ // if in defnition list, set term flag and continue
+ if *flags&LIST_TYPE_DEFINITION != 0 {
+ *flags |= LIST_TYPE_TERM
+ } else {
+ return 0
+ }
+ }
+
+ // skip leading whitespace on first line
+ for data[i] == ' ' {
+ i++
+ }
+
+ // find the end of the line
+ line := i
+ for i > 0 && data[i-1] != '\n' {
+ i++
+ }
+
+ // get working buffer
+ var raw bytes.Buffer
+
+ // put the first line into the working buffer
+ raw.Write(data[line:i])
+ line = i
+
+ // process the following lines
+ containsBlankLine := false
+ sublist := 0
+ codeBlockMarker := ""
+
+gatherlines:
+ for line < len(data) {
+ i++
+
+ // find the end of this line
+ for data[i-1] != '\n' {
+ i++
+ }
+
+ // if it is an empty line, guess that it is part of this item
+ // and move on to the next line
+ if p.isEmpty(data[line:i]) > 0 {
+ containsBlankLine = true
+ raw.Write(data[line:i])
+ line = i
+ continue
+ }
+
+ // calculate the indentation
+ indent := 0
+ for indent < 4 && line+indent < i && data[line+indent] == ' ' {
+ indent++
+ }
+
+ chunk := data[line+indent : i]
+
+ if p.flags&EXTENSION_FENCED_CODE != 0 {
+ // determine if in or out of codeblock
+ // if in codeblock, ignore normal list processing
+ _, marker := isFenceLine(chunk, nil, codeBlockMarker, false)
+ if marker != "" {
+ if codeBlockMarker == "" {
+ // start of codeblock
+ codeBlockMarker = marker
+ } else {
+ // end of codeblock.
+ *flags |= LIST_ITEM_CONTAINS_BLOCK
+ codeBlockMarker = ""
+ }
+ }
+ // we are in a codeblock, write line, and continue
+ if codeBlockMarker != "" || marker != "" {
+ raw.Write(data[line+indent : i])
+ line = i
+ continue gatherlines
+ }
+ }
+
+ // evaluate how this line fits in
+ switch {
+ // is this a nested list item?
+ case (p.uliPrefix(chunk) > 0 && !p.isHRule(chunk)) ||
+ p.oliPrefix(chunk) > 0 ||
+ p.dliPrefix(chunk) > 0:
+
+ if containsBlankLine {
+ // end the list if the type changed after a blank line
+ if indent <= itemIndent &&
+ ((*flags&LIST_TYPE_ORDERED != 0 && p.uliPrefix(chunk) > 0) ||
+ (*flags&LIST_TYPE_ORDERED == 0 && p.oliPrefix(chunk) > 0)) {
+
+ *flags |= LIST_ITEM_END_OF_LIST
+ break gatherlines
+ }
+ *flags |= LIST_ITEM_CONTAINS_BLOCK
+ }
+
+ // to be a nested list, it must be indented more
+ // if not, it is the next item in the same list
+ if indent <= itemIndent {
+ break gatherlines
+ }
+
+ // is this the first item in the nested list?
+ if sublist == 0 {
+ sublist = raw.Len()
+ }
+
+ // is this a nested prefix header?
+ case p.isPrefixHeader(chunk):
+ // if the header is not indented, it is not nested in the list
+ // and thus ends the list
+ if containsBlankLine && indent < 4 {
+ *flags |= LIST_ITEM_END_OF_LIST
+ break gatherlines
+ }
+ *flags |= LIST_ITEM_CONTAINS_BLOCK
+
+ // anything following an empty line is only part
+ // of this item if it is indented 4 spaces
+ // (regardless of the indentation of the beginning of the item)
+ case containsBlankLine && indent < 4:
+ if *flags&LIST_TYPE_DEFINITION != 0 && i < len(data)-1 {
+ // is the next item still a part of this list?
+ next := i
+ for data[next] != '\n' {
+ next++
+ }
+ for next < len(data)-1 && data[next] == '\n' {
+ next++
+ }
+ if i < len(data)-1 && data[i] != ':' && data[next] != ':' {
+ *flags |= LIST_ITEM_END_OF_LIST
+ }
+ } else {
+ *flags |= LIST_ITEM_END_OF_LIST
+ }
+ break gatherlines
+
+ // a blank line means this should be parsed as a block
+ case containsBlankLine:
+ *flags |= LIST_ITEM_CONTAINS_BLOCK
+ }
+
+ containsBlankLine = false
+
+ // add the line into the working buffer without prefix
+ raw.Write(data[line+indent : i])
+
+ line = i
+ }
+
+ // If reached end of data, the Renderer.ListItem call we're going to make below
+ // is definitely the last in the list.
+ if line >= len(data) {
+ *flags |= LIST_ITEM_END_OF_LIST
+ }
+
+ rawBytes := raw.Bytes()
+
+ // render the contents of the list item
+ var cooked bytes.Buffer
+ if *flags&LIST_ITEM_CONTAINS_BLOCK != 0 && *flags&LIST_TYPE_TERM == 0 {
+ // intermediate render of block item, except for definition term
+ if sublist > 0 {
+ p.block(&cooked, rawBytes[:sublist])
+ p.block(&cooked, rawBytes[sublist:])
+ } else {
+ p.block(&cooked, rawBytes)
+ }
+ } else {
+ // intermediate render of inline item
+ if sublist > 0 {
+ p.inline(&cooked, rawBytes[:sublist])
+ p.block(&cooked, rawBytes[sublist:])
+ } else {
+ p.inline(&cooked, rawBytes)
+ }
+ }
+
+ // render the actual list item
+ cookedBytes := cooked.Bytes()
+ parsedEnd := len(cookedBytes)
+
+ // strip trailing newlines
+ for parsedEnd > 0 && cookedBytes[parsedEnd-1] == '\n' {
+ parsedEnd--
+ }
+ p.r.ListItem(out, cookedBytes[:parsedEnd], *flags)
+
+ return line
+}
+
+// render a single paragraph that has already been parsed out
+func (p *parser) renderParagraph(out *bytes.Buffer, data []byte) {
+ if len(data) == 0 {
+ return
+ }
+
+ // trim leading spaces
+ beg := 0
+ for data[beg] == ' ' {
+ beg++
+ }
+
+ // trim trailing newline
+ end := len(data) - 1
+
+ // trim trailing spaces
+ for end > beg && data[end-1] == ' ' {
+ end--
+ }
+
+ work := func() bool {
+ p.inline(out, data[beg:end])
+ return true
+ }
+ p.r.Paragraph(out, work)
+}
+
+func (p *parser) paragraph(out *bytes.Buffer, data []byte) int {
+ // prev: index of 1st char of previous line
+ // line: index of 1st char of current line
+ // i: index of cursor/end of current line
+ var prev, line, i int
+
+ // keep going until we find something to mark the end of the paragraph
+ for i < len(data) {
+ // mark the beginning of the current line
+ prev = line
+ current := data[i:]
+ line = i
+
+ // did we find a blank line marking the end of the paragraph?
+ if n := p.isEmpty(current); n > 0 {
+ // did this blank line followed by a definition list item?
+ if p.flags&EXTENSION_DEFINITION_LISTS != 0 {
+ if i < len(data)-1 && data[i+1] == ':' {
+ return p.list(out, data[prev:], LIST_TYPE_DEFINITION)
+ }
+ }
+
+ p.renderParagraph(out, data[:i])
+ return i + n
+ }
+
+ // an underline under some text marks a header, so our paragraph ended on prev line
+ if i > 0 {
+ if level := p.isUnderlinedHeader(current); level > 0 {
+ // render the paragraph
+ p.renderParagraph(out, data[:prev])
+
+ // ignore leading and trailing whitespace
+ eol := i - 1
+ for prev < eol && data[prev] == ' ' {
+ prev++
+ }
+ for eol > prev && data[eol-1] == ' ' {
+ eol--
+ }
+
+ // render the header
+ // this ugly double closure avoids forcing variables onto the heap
+ work := func(o *bytes.Buffer, pp *parser, d []byte) func() bool {
+ return func() bool {
+ pp.inline(o, d)
+ return true
+ }
+ }(out, p, data[prev:eol])
+
+ id := ""
+ if p.flags&EXTENSION_AUTO_HEADER_IDS != 0 {
+ id = SanitizedAnchorName(string(data[prev:eol]))
+ }
+
+ p.r.Header(out, work, level, id)
+
+ // find the end of the underline
+ for data[i] != '\n' {
+ i++
+ }
+ return i
+ }
+ }
+
+ // if the next line starts a block of HTML, then the paragraph ends here
+ if p.flags&EXTENSION_LAX_HTML_BLOCKS != 0 {
+ if data[i] == '<' && p.html(out, current, false) > 0 {
+ // rewind to before the HTML block
+ p.renderParagraph(out, data[:i])
+ return i
+ }
+ }
+
+ // if there's a prefixed header or a horizontal rule after this, paragraph is over
+ if p.isPrefixHeader(current) || p.isHRule(current) {
+ p.renderParagraph(out, data[:i])
+ return i
+ }
+
+ // if there's a fenced code block, paragraph is over
+ if p.flags&EXTENSION_FENCED_CODE != 0 {
+ if p.fencedCodeBlock(out, current, false) > 0 {
+ p.renderParagraph(out, data[:i])
+ return i
+ }
+ }
+
+ // if there's a definition list item, prev line is a definition term
+ if p.flags&EXTENSION_DEFINITION_LISTS != 0 {
+ if p.dliPrefix(current) != 0 {
+ return p.list(out, data[prev:], LIST_TYPE_DEFINITION)
+ }
+ }
+
+ // if there's a list after this, paragraph is over
+ if p.flags&EXTENSION_NO_EMPTY_LINE_BEFORE_BLOCK != 0 {
+ if p.uliPrefix(current) != 0 ||
+ p.oliPrefix(current) != 0 ||
+ p.quotePrefix(current) != 0 ||
+ p.codePrefix(current) != 0 {
+ p.renderParagraph(out, data[:i])
+ return i
+ }
+ }
+
+ // otherwise, scan to the beginning of the next line
+ for data[i] != '\n' {
+ i++
+ }
+ i++
+ }
+
+ p.renderParagraph(out, data[:i])
+ return i
+}
+
+// SanitizedAnchorName returns a sanitized anchor name for the given text.
+//
+// It implements the algorithm specified in the package comment.
+func SanitizedAnchorName(text string) string {
+ var anchorName []rune
+ futureDash := false
+ for _, r := range text {
+ switch {
+ case unicode.IsLetter(r) || unicode.IsNumber(r):
+ if futureDash && len(anchorName) > 0 {
+ anchorName = append(anchorName, '-')
+ }
+ futureDash = false
+ anchorName = append(anchorName, unicode.ToLower(r))
+ default:
+ futureDash = true
+ }
+ }
+ return string(anchorName)
+}
diff --git a/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/russross/blackfriday/doc.go b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/russross/blackfriday/doc.go
new file mode 100644
index 00000000..9656c42a
--- /dev/null
+++ b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/russross/blackfriday/doc.go
@@ -0,0 +1,32 @@
+// Package blackfriday is a Markdown processor.
+//
+// It translates plain text with simple formatting rules into HTML or LaTeX.
+//
+// Sanitized Anchor Names
+//
+// Blackfriday includes an algorithm for creating sanitized anchor names
+// corresponding to a given input text. This algorithm is used to create
+// anchors for headings when EXTENSION_AUTO_HEADER_IDS is enabled. The
+// algorithm is specified below, so that other packages can create
+// compatible anchor names and links to those anchors.
+//
+// The algorithm iterates over the input text, interpreted as UTF-8,
+// one Unicode code point (rune) at a time. All runes that are letters (category L)
+// or numbers (category N) are considered valid characters. They are mapped to
+// lower case, and included in the output. All other runes are considered
+// invalid characters. Invalid characters that preceed the first valid character,
+// as well as invalid character that follow the last valid character
+// are dropped completely. All other sequences of invalid characters
+// between two valid characters are replaced with a single dash character '-'.
+//
+// SanitizedAnchorName exposes this functionality, and can be used to
+// create compatible links to the anchor names generated by blackfriday.
+// This algorithm is also implemented in a small standalone package at
+// github.com/shurcooL/sanitized_anchor_name. It can be useful for clients
+// that want a small package and don't need full functionality of blackfriday.
+package blackfriday
+
+// NOTE: Keep Sanitized Anchor Name algorithm in sync with package
+// github.com/shurcooL/sanitized_anchor_name.
+// Otherwise, users of sanitized_anchor_name will get anchor names
+// that are incompatible with those generated by blackfriday.
diff --git a/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/russross/blackfriday/go.mod b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/russross/blackfriday/go.mod
new file mode 100644
index 00000000..b05561a0
--- /dev/null
+++ b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/russross/blackfriday/go.mod
@@ -0,0 +1 @@
+module github.com/russross/blackfriday
diff --git a/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/russross/blackfriday/html.go b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/russross/blackfriday/html.go
new file mode 100644
index 00000000..e0a6c69c
--- /dev/null
+++ b/functions/ingest/vendor/github.com/v3io/v3io-tsdb/vendor/github.com/russross/blackfriday/html.go
@@ -0,0 +1,938 @@
+//
+// Blackfriday Markdown Processor
+// Available at http://github.com/russross/blackfriday
+//
+// Copyright © 2011 Russ Ross .
+// Distributed under the Simplified BSD License.
+// See README.md for details.
+//
+
+//
+//
+// HTML rendering backend
+//
+//
+
+package blackfriday
+
+import (
+ "bytes"
+ "fmt"
+ "regexp"
+ "strconv"
+ "strings"
+)
+
+// Html renderer configuration options.
+const (
+ HTML_SKIP_HTML = 1 << iota // skip preformatted HTML blocks
+ HTML_SKIP_STYLE // skip embedded ", basePathEscaped)
+ fmt.Fprintf(w, "%s
", basePathEscaped)
+ fmt.Fprintf(w, "")
+
+ if len(basePathEscaped) > 1 {
+ var parentURI URI
+ base.CopyTo(&parentURI)
+ parentURI.Update(string(base.Path()) + "/..")
+ parentPathEscaped := html.EscapeString(string(parentURI.Path()))
+ fmt.Fprintf(w, `- ..
`, parentPathEscaped)
+ }
+
+ f, err := os.Open(dirPath)
+ if err != nil {
+ return nil, err
+ }
+
+ fileinfos, err := f.Readdir(0)
+ f.Close()
+ if err != nil {
+ return nil, err
+ }
+
+ fm := make(map[string]os.FileInfo, len(fileinfos))
+ filenames := make([]string, 0, len(fileinfos))
+ for _, fi := range fileinfos {
+ name := fi.Name()
+ if strings.HasSuffix(name, h.compressedFileSuffix) {
+ // Do not show compressed files on index page.
+ continue
+ }
+ fm[name] = fi
+ filenames = append(filenames, name)
+ }
+
+ var u URI
+ base.CopyTo(&u)
+ u.Update(string(u.Path()) + "/")
+
+ sort.Strings(filenames)
+ for _, name := range filenames {
+ u.Update(name)
+ pathEscaped := html.EscapeString(string(u.Path()))
+ fi := fm[name]
+ auxStr := "dir"
+ className := "dir"
+ if !fi.IsDir() {
+ auxStr = fmt.Sprintf("file, %d bytes", fi.Size())
+ className = "file"
+ }
+ fmt.Fprintf(w, `- %s, %s, last modified %s
`,
+ pathEscaped, className, html.EscapeString(name), auxStr, fsModTime(fi.ModTime()))
+ }
+
+ fmt.Fprintf(w, "