Use GitHub actions (#8)

* use Github Actions

.github/workflows/go112.yml

@@ -0,0 +1,20 @@
+name: go1.12
+on: [push]
+jobs:
+
+  build:
+    name: Build in Go1.12
+    runs-on: ubuntu-latest
+    steps:
+
+      - name: Set up Go 1.12
+        uses: actions/setup-go@v1
+        with:
+          go-version: 1.12
+        id: go
+
+      - name: Check out code into the Go module directory
+        uses: actions/checkout@v1
+
+      - name: Test
+        run: go test -v -cover .

README.md

@@ -2,9 +2,8 @@ godolint
 ===
 
 [![GitHub release](http://img.shields.io/github/release/zabio3/godolint.svg?style=flat-square)](https://github.com/zabio3/godolint/releases/latest)
-[![Build Status](https://travis-ci.org/zabio3/godolint.svg?branch=master)](https://travis-ci.org/zabio3/godolint)
+[![Actions Status](https://github.com/zabio3/godolint/workflows/go1.12/badge.svg)](https://github.com/zabio3/godolint/actions)
 [![Golang CI](https://golangci.com/badges/github.com/zabio3/godolint.svg)](https://golangci.com/r/github.com/zabio3/godolint)
-[![codecov](https://codecov.io/gh/zabio3/godolint/branch/master/graph/badge.svg)](https://codecov.io/gh/zabio3/godolint)
 [![Go Report Card](https://goreportcard.com/badge/github.com/zabio3/godolint)](https://goreportcard.com/report/github.com/zabio3/godolint)
 [![GoDoc](https://godoc.org/github.com/zabio3/godolint?status.svg)](https://godoc.org/github.com/zabio3/godolint)
 [![Maintainability](https://api.codeclimate.com/v1/badges/4c1c216781e5592d4194/maintainability)](https://codeclimate.com/github/zabio3/godolint/maintainability)

cmd/cli.go

@@ -15,7 +15,7 @@ import (
 
 // Exit codes are int values that represent an exit code for a particular error.
 const (
-	ExitCodeOK = iota
+	ExitCodeOK = iota + 1
 	ExitCodeParseFlagsError
 	ExitCodeNoExistError
 	ExitCodeFileError
@@ -41,7 +41,7 @@ Other Commands:
   --version	-v	Print the version information
 `
 
-// CLI represents CLI interface
+// CLI represents CLI interface.
 type CLI struct {
 	OutStream, ErrStream io.Writer
 }
@@ -64,56 +64,56 @@ func (cli *CLI) Run(args []string) int {
 
 	flags := flag.NewFlagSet(name, flag.ContinueOnError)
 	flags.Usage = func() {
-		_, _ = fmt.Fprint(cli.OutStream, usage)
+		fmt.Fprint(cli.OutStream, usage)
 	}
 
 	flags.Var(&ignoreRules, "ignore", "Set ignore strings")
 	flags.BoolVar(&isVersion, "version", false, "version")
 	flags.BoolVar(&isVersion, "v", false, "version")
 
 	if err := flags.Parse(args[1:]); err != nil {
-		_, _ = fmt.Fprintf(cli.ErrStream, "%v\n", err)
+		fmt.Fprintf(cli.ErrStream, "%v\n", err)
 		return ExitCodeParseFlagsError
 	}
 
 	if isVersion {
-		_, _ = fmt.Fprintf(cli.OutStream, "godolint version %v\n", version)
+		fmt.Fprintf(cli.OutStream, "godolint version %v\n", version)
 		return ExitCodeOK
 	}
 
 	length := len(args)
 	// The Dockerfile to be analyzed must be the last.
 	if length < 2 {
-		_, _ = fmt.Fprintf(cli.ErrStream, "Please provide a Dockerfile\n")
+		fmt.Fprintf(cli.ErrStream, "Please provide a Dockerfile\n")
 		return ExitCodeNoExistError
 	}
 
 	file := args[length-1]
 	f, err := os.Open(file)
 	if err != nil {
-		_, _ = fmt.Fprintf(cli.ErrStream, "%v\n", err)
+		fmt.Fprintf(cli.ErrStream, "%v\n", err)
 		return ExitCodeFileError
 	}
 
 	r, err := parser.Parse(f)
 	if err != nil {
-		_, _ = fmt.Fprintf(cli.ErrStream, "%v\n", err)
+		fmt.Fprintf(cli.ErrStream, "%v\n", err)
 		return ExitCodeAstParseError
 	}
 
 	analyzer := linter.NewAnalyzer(ignoreRules)
 	rst, err := analyzer.Run(r.AST)
 	if err != nil {
-		_, _ = fmt.Fprintf(cli.ErrStream, "%v\n", err)
+		fmt.Fprintf(cli.ErrStream, "%v\n", err)
 		return ExitCodeLintCheckError
 	}
 
 	rst = sort.StringSlice(rst)
 	var output string
-	for _, s := range rst {
+	for i := range rst {
 		// ends of each strings have "\n"
-		output = output + s
+		output = output + rst[i]
 	}
-	_, _ = fmt.Fprint(cli.OutStream, output)
+	fmt.Fprint(cli.OutStream, output)
 	return ExitCodeOK
 }

go.mod

@@ -1,3 +1,3 @@
 module github.com/zabio3/godolint
 
-require github.com/moby/buildkit v0.6.1
+require github.com/moby/buildkit v0.6.3

go.sum

@@ -11,10 +11,10 @@ github.com/containerd/console v0.0.0-20181022165439-0650fd9eeb50/go.mod h1:Tj/on
 github.com/containerd/containerd v1.2.4/go.mod h1:bC6axHOhabU15QhwfG7w5PipXdVtMXFTttgp+kVtyUA=
 github.com/containerd/containerd v1.3.0-0.20190507210959-7c1e88399ec0/go.mod h1:bC6axHOhabU15QhwfG7w5PipXdVtMXFTttgp+kVtyUA=
 github.com/containerd/continuity v0.0.0-20181001140422-bd77b46c8352/go.mod h1:GL3xCUCBDV3CZiTSEKksMWbLE66hEyuu9qyDOOqM47Y=
-github.com/containerd/continuity v0.0.0-20190426062206-aaeac12a7ffc/go.mod h1:GL3xCUCBDV3CZiTSEKksMWbLE66hEyuu9qyDOOqM47Y=
+github.com/containerd/continuity v0.0.0-20190827140505-75bee3e2ccb6/go.mod h1:GL3xCUCBDV3CZiTSEKksMWbLE66hEyuu9qyDOOqM47Y=
 github.com/containerd/fifo v0.0.0-20180307165137-3d5202aec260/go.mod h1:ODA38xgv3Kuk8dQz2ZQXpnv/UZZUHUCL7pnLehbXgQI=
 github.com/containerd/go-cni v0.0.0-20190610170741-5a4663dad645/go.mod h1:2wlRxCQdiBY+OcjNg5x8kI+5mEL1fGt25L4IzQHYJsM=
-github.com/containerd/go-runc v0.0.0-20180907222934-5a6d9f37cfa3/go.mod h1:IV7qH3hrUgRmyYrtgEeGWJfWbgcHL9CSRruz2Vqcph0=
+github.com/containerd/go-runc v0.0.0-20190911050354-e029b79d8cda/go.mod h1:IV7qH3hrUgRmyYrtgEeGWJfWbgcHL9CSRruz2Vqcph0=
 github.com/containerd/ttrpc v0.0.0-20190411181408-699c4e40d1e7/go.mod h1:PvCDdDGpgqzQIzDW1TphrGLssLDZp2GuS+X5DkEJB8o=
 github.com/containerd/typeurl v0.0.0-20180627222232-a93fcdb778cd/go.mod h1:Cm3kwCdlkCfMSHURc+r6fwoGH6/F1hH3S4sg0rLFWPc=
 github.com/containernetworking/cni v0.6.1-0.20180218032124-142cde0c766c/go.mod h1:LGwApLUm2FpoOfxTDEeq8T9ipbpZ61X79hmU3w8FmsY=
@@ -57,8 +57,8 @@ github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORN
 github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
 github.com/mitchellh/hashstructure v0.0.0-20170609045927-2bca23e0e452/go.mod h1:QjSHrPWS+BGUVBYkbTZWEnOh3G1DutKwClXU/ABz6AQ=
-github.com/moby/buildkit v0.6.1 h1:mD45fgAPzbFsP38XdJQkYYy0ij6RWzjJGBBnuF25Aq0=
-github.com/moby/buildkit v0.6.1/go.mod h1:bXDz0nCc9+IvUTVSAyjytY1WcXApDpwpP7vOc0lFTNY=
+github.com/moby/buildkit v0.6.3 h1:2eFVHDz1E9uyMsbquywvjPIZ0yHT58HWCcn0K9qavWM=
+github.com/moby/buildkit v0.6.3/go.mod h1:JKVImCzxztxvULr5P6ZiBfA/B2P+ZpR6UHxOXQn4KiU=
 github.com/morikuni/aec v0.0.0-20170113033406-39771216ff4c/go.mod h1:BbKIizmSmc5MMPqRYbxO4ZU0S0+P200+tUnFx7PXmsc=
 github.com/onsi/ginkgo v1.6.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
 github.com/onsi/ginkgo v1.7.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
@@ -82,7 +82,7 @@ github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+
 github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/syndtr/gocapability v0.0.0-20180916011248-d98352740cb2/go.mod h1:hkRG7XYTFWNJGYcbNJQlaLq0fg1yr4J4t/NcTQtrfww=
-github.com/tonistiigi/fsutil v0.0.0-20190327153851-3bbb99cdbd76/go.mod h1:pzh7kdwkDRh+Bx8J30uqaKJ1M4QrSH/um8fcIXeM8rc=
+github.com/tonistiigi/fsutil v0.0.0-20190819224149-3d2716dd0a4d/go.mod h1:pzh7kdwkDRh+Bx8J30uqaKJ1M4QrSH/um8fcIXeM8rc=
 github.com/tonistiigi/units v0.0.0-20180711220420-6950e57a87ea/go.mod h1:WPnis/6cRcDZSUvVmezrxJPkiO87ThFYsoUiMwWNDJk=
 github.com/uber/jaeger-client-go v0.0.0-20180103221425-e02c85f9069e/go.mod h1:WVhlPFC8FDjOFMMWRy2pZqQJSXxYSwNYOkTr/Z6d3Kk=
 github.com/uber/jaeger-lib v1.2.1/go.mod h1:ComeNDZlWwrWnDv8aPp0Ba6+uUTzImX/AauajbLI56U=

linter/analyzer.go

@@ -12,7 +12,7 @@ type Analyzer struct {
 	rules []*rules.Rule
 }
 
-// NewAnalyzer generate a NewAnalyzer with rules to apply
+// NewAnalyzer generate a NewAnalyzer with rules to apply.
 func NewAnalyzer(ignoreRules []string) Analyzer {
 	return newAnalyzer(ignoreRules)
 }
@@ -27,21 +27,21 @@ func newAnalyzer(ignoreRules []string) Analyzer {
 	return Analyzer{rules: filteredRules}
 }
 
-// Run apply docker best practice rules to docker ast
+// Run apply docker best practice rules to docker ast.
 func (a Analyzer) Run(node *parser.Node) ([]string, error) {
 	var rst []string
 	rstChan := make(chan []string, len(a.rules))
 	errChan := make(chan error, len(a.rules))
 
-	for _, rule := range a.rules {
+	for i := range a.rules {
 		go func(r *rules.Rule) {
 			vrst, err := r.ValidateFunc(node)
 			if err != nil {
 				errChan <- err
 			} else {
-				rstChan <- rules.CreateMessage(rule, vrst)
+				rstChan <- rules.CreateMessage(a.rules[i], vrst)
 			}
-		}(rule)
+		}(a.rules[i])
 		select {
 		case value := <-rstChan:
 			rst = append(rst, value...)
@@ -52,29 +52,29 @@ func (a Analyzer) Run(node *parser.Node) ([]string, error) {
 	return rst, nil
 }
 
-// getMakeDifference is a function to create a difference set
+// getMakeDifference is a function to create a difference set.
 func getMakeDiff(xs, ys []string) []string {
 	if len(xs) > len(ys) {
 		return makeDiff(xs, ys)
 	}
 	return makeDiff(ys, xs)
 }
 
-// make set difference
+// make set difference.
 func makeDiff(xs, ys []string) []string {
 	var set []string
-	for _, c := range xs {
-		if !isContain(ys, c) {
-			set = append(set, c)
+	for i := range xs {
+		if !isContain(ys, xs[i]) {
+			set = append(set, xs[i])
 		}
 	}
 	return set
 }
 
-// isContain is a function to check if s is in xs
+// isContain is a function to check if s is in xs.
 func isContain(xs []string, s string) bool {
-	for _, x := range xs {
-		if s == x {
+	for i := range xs {
+		if xs[i] == s {
 			return true
 		}
 	}

linter/rules/dl3001.go

@@ -6,7 +6,8 @@ import (
 	"github.com/moby/buildkit/frontend/dockerfile/parser"
 )
 
-// validateDL3001 is "For some bash commands it makes no sense running them in a Docker container like ssh, vim, shutdown, service, ps, free, top, kill, mount, ifconfig."
+// validateDL3001 is "For some bash commands it makes no sense running them in a Docker container
+// like ssh, vim, shutdown, service, ps, free, top, kill, mount, ifconfig."
 func validateDL3001(node *parser.Node) (rst []ValidateResult, err error) {
 	for _, child := range node.Children {
 		if child.Value == RUN {

linter/rules/dl3012.go

@@ -4,7 +4,13 @@ package rules
 //	"github.com/moby/buildkit/frontend/dockerfile/parser"
 //)
 //
-//// validateDL3012 Provide an email address or URL as maintainer. (deprecated)
-//func validateDL3012(node *parser.Node, file string) (rst []ValidateResult, err error) {
+//// validateDL3012 Provide an email address or URL as maintainer.
+//func validateDL3012(node *parser.Node) (rst []ValidateResult, err error) {
+//	for _, child := range node.Children {
+//		if child.Value == MAINTAINER {
+//
+//
+//		}
+//	}
 //	return rst, nil
 //}

linter/rules/dl3012_test.go

@@ -1,6 +1,5 @@
 package rules
 
-//
 //import (
 //	"testing"
 //)

linter/rules/dl3024.go

@@ -11,8 +11,7 @@ func validateDL3024(node *parser.Node) (rst []ValidateResult, err error) {
 	isAs := false
 	var asBuildName []string
 	for _, child := range node.Children {
-		switch child.Value {
-		case FROM:
+		if child.Value == FROM {
 			for _, v := range strings.Fields(child.Original) {
 				switch v {
 				case "as":

linter/rules/dl3025.go

@@ -10,8 +10,7 @@ import (
 func validateDL3025(node *parser.Node) (rst []ValidateResult, err error) {
 	for _, child := range node.Children {
 		isErr := false
-		switch child.Value {
-		case ENTRYPOINT, CMD:
+		if (child.Value == ENTRYPOINT) || (child.Value == CMD) {
 			args := strings.Fields(child.Original)
 			length := len(args) - 1
 			for i, v := range strings.Fields(child.Original) {

linter/rules/dl4000.go

@@ -7,8 +7,7 @@ import (
 // validateDL4000 MAINTAINER is deprecated
 func validateDL4000(node *parser.Node) (rst []ValidateResult, err error) {
 	for _, child := range node.Children {
-		switch child.Value {
-		case MAINTAINER:
+		if child.Value == MAINTAINER {
 			rst = append(rst, ValidateResult{line: child.StartLine, addMsg: ""})
 		}
 	}

linter/rules/dl4001.go

@@ -11,8 +11,7 @@ func validateDL4001(node *parser.Node) (rst []ValidateResult, err error) {
 	isCurl, isWget := false, false
 	var numArr []int
 	for _, child := range node.Children {
-		switch child.Value {
-		case RUN:
+		if child.Value == RUN {
 			for _, v := range strings.Fields(child.Next.Value) {
 				switch v {
 				case "curl":

linter/rules/dl4003.go

@@ -8,8 +8,7 @@ import (
 func validateDL4003(node *parser.Node) (rst []ValidateResult, err error) {
 	isCmd := false
 	for _, child := range node.Children {
-		switch child.Value {
-		case CMD:
+		if child.Value == CMD {
 			if !isCmd {
 				isCmd = true
 			} else {

linter/rules/dl4004.go

@@ -8,8 +8,7 @@ import (
 func validateDL4004(node *parser.Node) (rst []ValidateResult, err error) {
 	isEntryPoint := false
 	for _, child := range node.Children {
-		switch child.Value {
-		case ENTRYPOINT:
+		if child.Value == ENTRYPOINT {
 			if !isEntryPoint {
 				isEntryPoint = true
 			} else {

linter/rules/dl4005.go

@@ -9,8 +9,7 @@ import (
 // validateDL4005 Use SHELL to change the default shell
 func validateDL4005(node *parser.Node) (rst []ValidateResult, err error) {
 	for _, child := range node.Children {
-		switch child.Value {
-		case RUN:
+		if child.Value == RUN {
 			isLn := false
 			for _, v := range strings.Fields(child.Next.Value) {
 				switch v {