use default output dir

cmd/clone.go

@@ -3,6 +3,7 @@ package cmd
 import (
 	"fmt"
 	"os"
+	"strings"
 
 	degit "github.com/qiushiyan/degit/pkg"
 	"github.com/spf13/cobra"
@@ -13,17 +14,41 @@ var cloneCmd = &cobra.Command{
 	Use:   "clone <src> <dst>",
 	Short: "Clone a repository locally",
 	Long:  `Downloads a repository into a local destination directory.`,
-	Args:  cobra.MatchAll(cobra.ExactArgs(2), cobra.OnlyValidArgs),
+	Args:  cobra.MatchAll(cobra.OnlyValidArgs, cobra.MinimumNArgs(1)),
 	RunE: func(cmd *cobra.Command, args []string) error {
-		dst := args[1]
+		repo, err := degit.ParseRepo(args[0])
+		if err != nil {
+			return err
+		}
+
+		// if dst is not specified, use the repo name or subdir as the name for the output directory
+		var dst string
+		if len(args) < 2 {
+			if repo.Subdir != "" {
+				if strings.HasPrefix(repo.Subdir, "/") {
+					dst = repo.Subdir[1:]
+				} else {
+					dst = repo.Subdir
+				}
+			} else {
+				dst = repo.Name
+			}
+		} else {
+			dst = args[1]
+		}
+
 		if !Force {
 			stat, err := os.Stat(dst)
 			if err == nil && stat.IsDir() {
-				return fmt.Errorf("destination %s already exists, use --force to overwrite", dst)
+				return fmt.Errorf("destination `%s` already exists, use --force to overwrite", dst)
 			}
 		}
 
-		err := degit.Clone(args[0], args[1], Force, Verbose)
+		if Verbose {
+			fmt.Printf("Cloning `%s` into `%s`\n", repo.URL, dst)
+		}
+
+		err = repo.Clone(dst, Force, Verbose)
 		if err != nil {
 			return err
 		}
@@ -34,7 +59,9 @@ var cloneCmd = &cobra.Command{
 		}
 
 		if len(entries) == 0 {
-			fmt.Println("output directory is empty. did you specify the correct directory?")
+			fmt.Println(
+				"Output directory is empty, you might have specified an non-existing subfolder in the repository",
+			)
 		}
 
 		return nil

pkg/parse.go

@@ -21,7 +21,10 @@ func ParseRepo(src string) (*Repo, error) {
 	)
 	match := re.FindStringSubmatch(src)
 	if match == nil {
-		return nil, fmt.Errorf("could not parse %s", src)
+		return nil, fmt.Errorf(
+			"cant recognize %s as a git repository, example: github.com/user/repo",
+			src,
+		)
 	}
 
 	site := firstNonEmpty(match[1], match[2], match[3], "github")

pkg/repo.go

@@ -89,11 +89,11 @@ func (r *Repo) Clone(dst string, force bool, verbose bool) error {
 }
 
 func (r *Repo) download(dst string, hash string, verbose bool) error {
-	f, err := os.Create(dst)
+	folder, err := os.Create(dst)
 	if err != nil {
 		return err
 	}
-	defer f.Close()
+	defer folder.Close()
 
 	var url string
 	switch r.Site {
@@ -118,7 +118,7 @@ func (r *Repo) download(dst string, hash string, verbose bool) error {
 	}
 	defer resp.Body.Close()
 
-	_, err = io.Copy(f, resp.Body)
+	_, err = io.Copy(folder, resp.Body)
 
 	return err
 }