Implement clone command

Author: creekorful

clone.go

@@ -0,0 +1,38 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"log"
+	"os"
+	"os/exec"
+)
+
+func execClone(args []string) {
+	fs := flag.NewFlagSet("clone", flag.ExitOnError)
+
+	fs.Usage = func() {
+		fmt.Fprintf(os.Stderr, "Usage: %s clone <package-name>\n", os.Args[0])
+		fmt.Fprintf(os.Stderr, "Clone a Go package from Salsa\n"+
+			"and download the appropriate tarball.\n")
+		fmt.Fprintf(os.Stderr, "Example: %s clone golang-github-mmcdole-goxpp\n", os.Args[0])
+	}
+
+	err := fs.Parse(args)
+	if err != nil {
+		log.Fatalf("parse args: %s", err)
+	}
+
+	if fs.NArg() != 1 {
+		fs.Usage()
+		os.Exit(1)
+	}
+
+	cmd := exec.Command("gbp", "clone", fmt.Sprintf("vcsgit:%s", fs.Arg(0)), "--postclone=origtargz")
+	cmd.Stderr = os.Stderr
+	if err := cmd.Run(); err != nil {
+		log.Fatalf("Could not run %v: %v", cmd.Args, err)
+	}
+
+	fmt.Printf("Successfully cloned %s\n", fs.Arg(0))
+}

main.go

@@ -26,6 +26,7 @@ func usage() {
 	fmt.Fprintf(os.Stderr, "\tsearch\t\t\tsearch Debian for already-existing packages\n")
 	fmt.Fprintf(os.Stderr, "\testimate\t\testimate the amount of work for a package\n")
 	fmt.Fprintf(os.Stderr, "\tcreate-salsa-project\tcreate a project for hosting Debian packaging\n")
+	fmt.Fprintf(os.Stderr, "\tclone\t\t\tclone a Go package from Salsa\n")
 	fmt.Fprintf(os.Stderr, "\n")
 	fmt.Fprintf(os.Stderr, "For backwards compatibility, when no command is specified,\nthe make command is executed.\n")
 	fmt.Fprintf(os.Stderr, "\n")
@@ -62,6 +63,8 @@ func main() {
 		execEstimate(args[1:])
 	case "make":
 		execMake(args[1:], nil)
+	case "clone":
+		execClone(args[1:])
 	default:
 		// redirect -help to the global usage
 		execMake(args, usage)