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Add magefile, version command (fixes #2)
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David Moles
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Feb 5, 2019
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,33 @@ | ||
| package cmd | ||
|
|
||
| import ( | ||
| "fmt" | ||
|
|
||
| "github.com/spf13/cobra" | ||
| ) | ||
|
|
||
| var tag string | ||
| var commitHash string | ||
| var timestamp string | ||
|
|
||
| func init() { | ||
| cmd := &cobra.Command{ | ||
| Use: "version", | ||
| Short: "print cos version", | ||
| Args: cobra.ExactArgs(0), | ||
| Run: func(cmd *cobra.Command, args []string) { | ||
| fmt.Println("cos " + versionStr()) | ||
| }, | ||
| } | ||
| rootCmd.AddCommand(cmd) | ||
| } | ||
|
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||
| func versionStr() string { | ||
| // if these are blank, we were probably built with plain 'go build' or | ||
| // 'go install', bypassing the ldflags in the magefile | ||
| if tag == "" { | ||
| return "(unknown version)" | ||
| } | ||
| versionStr := fmt.Sprintf("%v (%v, %v)", tag, commitHash, timestamp) | ||
| return versionStr | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,164 @@ | ||
| // +build mage | ||
|
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| package main | ||
|
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| import ( | ||
| "fmt" | ||
| "io/ioutil" | ||
| "os" | ||
| "path/filepath" | ||
| "regexp" | ||
| "runtime" | ||
| "strings" | ||
| "time" | ||
|
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| "github.com/magefile/mage/mg" | ||
| "github.com/magefile/mage/sh" | ||
| ) | ||
|
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| const ( | ||
| appName = "cos" | ||
| ) | ||
|
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| var gocmd = mg.GoCmd() | ||
|
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| var oses = []string{"darwin", "linux", "windows"} | ||
| var architectures = []string{"amd64"} | ||
|
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| // ------------------------------------------------------------ | ||
| // Targets | ||
|
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| // Install installs cos in $GOPATH/bin. | ||
| func Install() error { | ||
| binName := appName | ||
| if runtime.GOOS == "windows" { | ||
| binName += ".exe" | ||
| } | ||
|
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| gopath, err := sh.Output(gocmd, "env", "GOPATH") | ||
| if err != nil { | ||
| return fmt.Errorf("error determining GOPATH: %v", err) | ||
| } | ||
| binDir := filepath.Join(gopath, "bin") | ||
| binPath := filepath.Join(binDir, binName) | ||
|
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| flags, err := ldFlags() | ||
| if err != nil { | ||
| return fmt.Errorf("error determining ldflags: %v", err) | ||
| } | ||
| return sh.RunV(gocmd, "build", "-o", binPath, "-ldflags", flags) | ||
| } | ||
|
|
||
| // Build builds a cos binary for the current platform. | ||
| func Build() error { | ||
| binName := appName | ||
| if runtime.GOOS == "windows" { | ||
| binName += ".exe" | ||
| } | ||
| flags, err := ldFlags() | ||
| if err != nil { | ||
| return fmt.Errorf("error determining ldflags: %v", err) | ||
| } | ||
| return sh.RunV(gocmd, "build", "-ldflags", flags) | ||
| } | ||
|
|
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| // BuildAll builds a cos binary for each target platform. | ||
| func BuildAll() error { | ||
| for _, os_ := range oses { | ||
| for _, arch := range architectures { | ||
| binName := binNameFor(os_, arch) | ||
|
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| flags, err := ldFlags() | ||
| if err != nil { | ||
| return fmt.Errorf("error determining ldflags: %v", err) | ||
| } | ||
|
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| env := map[string]string{ | ||
| "GOOS": os_, | ||
| "GOARCH": arch, | ||
| } | ||
| err = sh.RunWith(env, gocmd, "build", "-o", binName, "-ldflags", flags) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| } | ||
| } | ||
| return nil | ||
| } | ||
|
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| // Platforms lists target platforms for buildAll. | ||
| func Platforms() { | ||
| for _, os_ := range oses { | ||
| for _, arch := range architectures { | ||
| fmt.Printf("%s-%s\n", os_, arch) | ||
| } | ||
| } | ||
| } | ||
|
|
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| // Clean removes compiled binaries from the current working directory. | ||
| func Clean() error { | ||
| var binRe = regexp.MustCompile("^" + appName + "(-[a-zA-Z0-9]+-[a-zA-Z0-9]+)?(.exe)?$") | ||
|
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| rmcmd := "rm" | ||
| if runtime.GOOS == "windows" { | ||
| rmcmd = "del" | ||
| } | ||
|
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| files, err := ioutil.ReadDir("./") | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
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| for _, f := range files { | ||
| mode := f.Mode() | ||
| isPlainFile := mode.IsRegular() && mode&os.ModeSymlink == 0 | ||
| isExecutable := mode&0111 != 0 | ||
| if isPlainFile && isExecutable { | ||
| name := f.Name() | ||
| if binRe.MatchString(name) { | ||
| err := sh.RunV(rmcmd, name) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| } | ||
| } | ||
| } | ||
| return nil | ||
| } | ||
|
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| // ------------------------------------------------------------ | ||
| // Helper functions | ||
|
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| func ldFlags() (string, error) { | ||
| commitHash, err := sh.Output("git", "rev-parse", "--short", "HEAD") | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
| tag, err := sh.Output("git", "describe", "--tags") | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
| timestamp := time.Now().Format(time.RFC3339) | ||
|
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| flagVals := map[string]string{ | ||
| "commitHash": commitHash, | ||
| "tag": tag, | ||
| "timestamp": timestamp, | ||
| } | ||
|
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| var flags []string | ||
| for k, v := range flagVals { | ||
| flag := fmt.Sprintf("-X github.com/dmolesUC3/cos/cmd.%s=%s", k, v) | ||
| flags = append(flags, flag) | ||
| } | ||
| return strings.Join(flags, " "), nil | ||
| } | ||
|
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| func binNameFor(os_ string, arch string) string { | ||
| binName := appName | ||
| binName = fmt.Sprintf("%s-%s-%s", binName, os_, arch) | ||
| if os_ == "windows" { | ||
| binName += ".exe" | ||
| } | ||
| return binName | ||
| } |