Merge pull request #4 from mikz/luacheck-0.22.0-1

update luacheck to 0.22.0

.codeclimate.yml

@@ -31,6 +31,7 @@ engines:
         - new
       only:
         - new
+      max_cyclomatic_complexity: 3
     checks:
       global:
         enabled: false

Dockerfile

@@ -1,7 +1,7 @@
 FROM alpine:3.7
 
-LABEL maintainer "Michal Cichra <[email protected]>"
-ENV LUA_VERSION=5.3 LUACHECK_VERSION=0.21.2
+LABEL maintainer="Michal Cichra <[email protected]>"
+ENV LUA_VERSION=5.3 LUACHECK_VERSION=0.22.0
 
 WORKDIR /tmp
 COPY Gemfile* /tmp/
@@ -10,10 +10,11 @@ RUN adduser -D -H -h /code -u 9000 -s /bin/false app \
  && apk add --no-cache --virtual build-dependencies \
                        lua${LUA_VERSION}-dev build-base curl ruby-dev icu-dev zlib-dev openssl-dev cmake \
  && luarocks-${LUA_VERSION} install luacheck ${LUACHECK_VERSION} \
- && luarocks-${LUA_VERSION} install lua-cjson \
+ && luarocks-${LUA_VERSION} install lua-cjson 2.1.0-1 \
  && BUNDLE_SILENCE_ROOT_WARNING=1 bundle install --system \
  && apk del build-dependencies \
- && ln -s $(which lua${LUA_VERSION}) /usr/local/bin/lua
+ && ln -s $(which lua${LUA_VERSION}) /usr/local/bin/lua \
+ && lua -e 'require("cjson").encode({})'
 
 USER app
 VOLUME /code

bin/engine-luacheck

@@ -61,6 +61,20 @@ checks.each do |name, value|
   end
 end
 
+LENGTH_OPTIONS = %w(max_line_length max_code_line_length max_string_line_length max_comment_line_length max_cyclomatic_complexity)
+
+length_options = LENGTH_OPTIONS.map do |name|
+  value = options.fetch(name, nil)
+  opt = name.tr('_', '-')
+
+  case value
+    when nil then next
+    when false then "--no-#{opt}"
+    when Numeric then [ "--#{opt}", value.to_s ]
+    else warn "Unknown value #{value} (#{value.class}) for option #{name}"
+  end
+end
+
 ARRAY_OPTIONS = %w(globals read_globals new_globals new_read_globals not_globals ignore enable only)
 
 array_options = ARRAY_OPTIONS.map do |name|
@@ -107,7 +121,15 @@ Find.find(*existing_paths) do |path|
   end
 end
 
-cmd = ['luacheck', *check_options.compact, *boolean_options.compact, *array_options.compact.flatten, '--formatter', 'codeclimate', *files ]
+cmd = [
+    'luacheck',
+    *check_options.compact,
+    *boolean_options.compact,
+    *length_options.compact.flatten,
+    *array_options.compact.flatten,
+    '--formatter', 'codeclimate',
+    *files
+]
 warn Shellwords.join(cmd)
 
 IO.popen(cmd) do |io|

lib/codeclimate.lua

@@ -69,6 +69,12 @@ local event_codes = {
 		minutes = 3,
 		description = [[https://luacheck.readthedocs.io/en/stable/warnings.html#control-flow-and-data-flow-issues]]
 	},
+	['561'] = { -- complexity
+		severity = 'major',
+		categories = { 'Complexity' },
+		minutes = function(event) return (event.complexity - event.max_complexity) * 10 end,
+		description = [[https://docs.codeclimate.com/docs/cyclomatic-complexity]]
+	},
 	['6'] = { -- whitespace
 		severity = 'info',
 		categories = { 'Style' },
@@ -78,7 +84,7 @@ local event_codes = {
 }
 
 local function event_info(event)
-	return event_codes[event.code:sub(1,1)]
+	return event_codes[event.code] or event_codes[event.code:sub(1,1)]
 end
 
 local function event_severity(event)
@@ -98,7 +104,9 @@ local function event_categories(event)
 end
 
 local function event_remediation_points(event)
-	return event_info(event).minutes * 10000
+	local minutes = event_info(event).minutes
+	if type(minutes) == 'function' then minutes = minutes(event) end
+	return minutes * 10000
 end
 
 local function hash(str)