Add CI script from the main tyk repo

On top of 'go test', this now enforces 'go vet', 'gofmt' and
'goimports'.

Fixes #25.

.travis.yml

@@ -9,9 +9,10 @@ matrix:
   include:
     - go: 1.7.x
     - go: 1.8.x
+      env: LATEST_GO=true # run linters and report coverage
 
 install:
   - go install ./...
 
 script:
-  - go test ./...
+  - ./utils/ci-test.sh

utils/ci-test.sh

@@ -0,0 +1,54 @@
+#!/bin/bash
+
+set -e
+
+MATRIX=(
+	""
+)
+
+# print a command and execute it
+show() {
+	echo "$@" >&2
+	eval "$@"
+}
+
+fatal() {
+	echo "$@" >&2
+	exit 1
+}
+
+PKGS="$(go list ./... | grep -v /vendor/)"
+
+i=0
+# need to do per-pkg because go test doesn't support a single coverage
+# profile for multiple pkgs
+for pkg in $PKGS; do
+	for opts in "${MATRIX[@]}"; do
+		show go test -timeout 30s -v -coverprofile=test-$i.cov $opts $pkg \
+			|| fatal "go test errored"
+		let i++ || true
+	done
+done
+
+if [[ ! $LATEST_GO ]]; then
+	echo "Skipping linting and coverage report"
+	exit 0
+fi
+
+for opts in "${MATRIX[@]}"; do
+	show go vet -v $opts $PKGS || fatal "go vet errored"
+done
+
+# Includes all top-level files and dirs that don't start with a dot
+# (hidden). Also excludes all of vendor/.
+GOFILES=$(find * -name '*.go' -not -path 'vendor/*')
+
+FMT_FILES="$(gofmt -s -l $GOFILES)"
+if [[ -n $FMT_FILES ]]; then
+	fatal "Run 'gofmt -s -w' on these files:\n$FMT_FILES"
+fi
+
+IMP_FILES="$(goimports -local github.com/TykTechnologies -l $GOFILES)"
+if [[ -n $IMP_FILES ]]; then
+	fatal "Run 'goimports -local github.com/TykTechnologies -w' on these files:\n$IMP_FILES"
+fi