src: implement backup

src/backup/backup.go

@@ -0,0 +1,60 @@
+package backup
+
+import (
+	"os"
+	"os/exec"
+
+	"github.com/yuk7/wsldl/lib/utils"
+)
+
+//Execute is default run entrypoint.
+func Execute(name string, args []string) {
+	opttar := false
+	optreg := true
+	switch len(args) {
+	case 0:
+		opttar = true
+		optreg = true
+
+	case 1:
+		switch args[0] {
+		case "--tar":
+			opttar = true
+		case "--reg":
+			optreg = true
+		}
+
+	default:
+		utils.ErrorExit(os.ErrInvalid, true, true, false)
+	}
+
+	if optreg {
+		lxguid, err := utils.WslGetUUID(name)
+		if err != nil {
+			utils.ErrorExit(err, true, true, false)
+		}
+		regexe := os.Getenv("SystemRoot") + "\\System32\\reg.exe"
+		regpath := "HKEY_CURRENT_USER\\" + utils.LxssBaseKey + "\\" + lxguid
+		_, err = exec.Command(regexe, "export", regpath, "backup.reg", "/y").Output()
+		if err != nil {
+			utils.ErrorExit(err, true, true, false)
+		}
+	}
+	if opttar {
+		wslexe := os.Getenv("SystemRoot") + "\\System32\\wsl.exe"
+		_, err := exec.Command(wslexe, "--export", name, "backup.tar").Output()
+		if err != nil {
+			utils.ErrorExit(err, true, true, false)
+		}
+	}
+}
+
+// ShowHelp shows help message
+func ShowHelp(showTitle bool) {
+	if showTitle {
+		println("Usage:")
+	}
+	println("    backup [contents]")
+	println("      - `--tar`: Output backup.tar to the current directory")
+	println("      - `--reg`: Output settings registry file to the current directory")
+}

src/help/help.go

@@ -1,6 +1,7 @@
 package help
 
 import (
+	"github.com/yuk7/wsldl/backup"
 	"github.com/yuk7/wsldl/clean"
 	"github.com/yuk7/wsldl/config"
 	"github.com/yuk7/wsldl/get"
@@ -18,7 +19,9 @@ func Execute(args []string) {
 		case "config", "set":
 			config.ShowHelp(true)
 		case "get":
-			config.ShowHelp(true)
+			get.ShowHelp(true)
+		case "backup":
+			backup.ShowHelp(true)
 		case "clean":
 			clean.ShowHelp(true)
 		case "help":
@@ -39,6 +42,8 @@ func ShowHelpAll() {
 	println()
 	get.ShowHelp(false)
 	println()
+	backup.ShowHelp(false)
+	println()
 	clean.ShowHelp(false)
 	println()
 	ShowHelp(false)

src/main.go

@@ -4,6 +4,7 @@ import (
 	"os"
 	"path/filepath"
 
+	"github.com/yuk7/wsldl/backup"
 	"github.com/yuk7/wsldl/clean"
 	"github.com/yuk7/wsldl/config"
 	"github.com/yuk7/wsldl/get"
@@ -43,6 +44,9 @@ func main() {
 		case "get":
 			get.Execute(name, os.Args[2:])
 
+		case "backup":
+			backup.Execute(name, os.Args[2:])
+
 		case "clean":
 			clean.Execute(name, os.Args[2:])