comand line init

.gitignore

@@ -19,3 +19,7 @@
 
 # Go workspace file
 go.work
+
+.idea
+hugov
+

cmd/cmd.go

@@ -0,0 +1,52 @@
+package cmd
+
+import (
+	"errors"
+	"flag"
+	"fmt"
+	"os"
+)
+
+func New() error {
+	topLevel := flag.NewFlagSet("hugov", flag.ExitOnError)
+	topLevel.Usage = func() {
+		fmt.Println("Usage:\n  hugov [command]")
+		fmt.Println("\nCommands:")
+		fmt.Println("  version:  show hugoverse command version")
+
+		fmt.Println("\nExample:")
+		fmt.Println("  hugov version")
+	}
+
+	err := topLevel.Parse(os.Args[1:])
+	if err != nil {
+		return err
+	}
+
+	if topLevel.Parsed() {
+		if len(topLevel.Args()) == 0 {
+			topLevel.Usage()
+			return errors.New("please specify a sub-command")
+		}
+
+		// 获取子命令及参数
+		subCommand := topLevel.Args()[0]
+
+		switch subCommand {
+		case "version":
+			versionCmd, err := NewVersionCmd(topLevel)
+			if err != nil {
+				return err
+			}
+			if err := versionCmd.Run(); err != nil {
+				return err
+			}
+
+		default:
+			topLevel.Usage()
+			return errors.New("invalid sub-command")
+		}
+	}
+
+	return nil
+}

cmd/version.go

@@ -0,0 +1,138 @@
+package cmd
+
+import (
+	"flag"
+	"fmt"
+	"runtime/debug"
+	"sync"
+)
+
+type versionCmd struct {
+	parent *flag.FlagSet
+	cmd    *flag.FlagSet
+}
+
+func NewVersionCmd(parent *flag.FlagSet) (*versionCmd, error) {
+	nCmd := &versionCmd{
+		parent: parent,
+	}
+
+	nCmd.cmd = flag.NewFlagSet("version", flag.ExitOnError)
+	err := nCmd.cmd.Parse(parent.Args()[1:])
+	if err != nil {
+		return nil, err
+	}
+
+	return nCmd, nil
+}
+
+func (oc *versionCmd) Usage() {
+	oc.cmd.Usage()
+}
+
+func (oc *versionCmd) Run() error {
+	fmt.Println(BuildVersionString())
+	return nil
+}
+
+func BuildVersionString() string {
+	program := "hugoverse"
+
+	version := "v" + CurrentVersion.String()
+
+	bi := getBuildInfo()
+	if bi == nil {
+		return version
+	}
+	if bi.Revision != "" {
+		version += "-" + bi.Revision
+	}
+
+	osArch := bi.GoOS + "/" + bi.GoArch
+
+	date := bi.RevisionTime
+	if date == "" {
+		date = "unknown"
+	}
+
+	versionString := fmt.Sprintf("%s %s %s BuildDate=%s",
+		program, version, osArch, date)
+
+	return versionString
+}
+
+var (
+	bInfo     *buildInfo
+	bInfoInit sync.Once
+)
+
+type buildInfo struct {
+	VersionControlSystem string
+	Revision             string
+	RevisionTime         string
+	Modified             bool
+
+	GoOS   string
+	GoArch string
+
+	*debug.BuildInfo
+}
+
+func getBuildInfo() *buildInfo {
+	bInfoInit.Do(func() {
+		bi, ok := debug.ReadBuildInfo()
+		if !ok {
+			return
+		}
+
+		bInfo = &buildInfo{BuildInfo: bi}
+
+		for _, s := range bInfo.Settings {
+			switch s.Key {
+			case "vcs":
+				bInfo.VersionControlSystem = s.Value
+			case "vcs.revision":
+				bInfo.Revision = s.Value
+			case "vcs.time":
+				bInfo.RevisionTime = s.Value
+			case "vcs.modified":
+				bInfo.Modified = s.Value == "true"
+			case "GOOS":
+				bInfo.GoOS = s.Value
+			case "GOARCH":
+				bInfo.GoArch = s.Value
+			}
+		}
+	})
+
+	return bInfo
+}
+
+var CurrentVersion = Version{
+	Major:      0,
+	Minor:      1,
+	PatchLevel: 0,
+	Suffix:     "-DEV",
+}
+
+// Version represents the Hugo build version.
+type Version struct {
+	Major int
+
+	Minor int
+
+	// Increment this for bug releases
+	PatchLevel int
+
+	// HugoVersionSuffix is the suffix used in the Hugo version string.
+	// It will be blank for release versions.
+	Suffix string
+}
+
+func (v Version) String() string {
+	return version(v.Major, v.Minor, v.PatchLevel, v.Suffix)
+}
+
+func version(major, minor, patch int, suffix string) string {
+	return fmt.Sprintf("%d.%d.%d%s", major, minor, patch, suffix)
+}

go.mod

@@ -0,0 +1,3 @@
+module github.com/gohugonet/hugoverse
+
+go 1.21.1

main.go

@@ -0,0 +1,14 @@
+package main
+
+import (
+	"github.com/gohugonet/hugoverse/cmd"
+	"log"
+)
+
+func main() {
+	log.SetFlags(0)
+	err := cmd.New()
+	if err != nil {
+		log.Fatalf("\nError: %s", err)
+	}
+}