1 files changed, 41 insertions, 6 deletions

diff --git a/commands/user_ls.go b/commands/user_ls.go
index 609ff5a4..b3fb32e6 100644
--- a/commands/user_ls.go
+++ b/commands/user_ls.go
@@ -1,15 +1,21 @@
 package commands
 
 import (
+	"encoding/json"
 	"fmt"
 
+	"github.com/spf13/cobra"
+
 	"github.com/MichaelMure/git-bug/cache"
 	"github.com/MichaelMure/git-bug/util/colors"
 	"github.com/MichaelMure/git-bug/util/interrupt"
-	"github.com/spf13/cobra"
 )
 
-func runUserLs(cmd *cobra.Command, args []string) error {
+var (
+	userLsOutputFormat string
+)
+
+func runUserLs(_ *cobra.Command, _ []string) error {
 	backend, err := cache.NewRepoCache(repo)
 	if err != nil {
 		return err
@@ -17,21 +23,48 @@ func runUserLs(cmd *cobra.Command, args []string) error {
 	defer backend.Close()
 	interrupt.RegisterCleaner(backend.Close)
 
-	for _, id := range backend.AllIdentityIds() {
-		i, err := backend.ResolveIdentityExcerpt(id)
+	ids := backend.AllIdentityIds()
+	var users []*cache.IdentityExcerpt
+	for _, id := range ids {
+		user, err := backend.ResolveIdentityExcerpt(id)
 		if err != nil {
 			return err
 		}
+		users = append(users, user)
+	}
+
+	switch userLsOutputFormat {
+	case "json":
+		return userLsJsonFormatter(users)
+	case "default":
+		return userLsDefaultFormatter(users)
+	default:
+		return fmt.Errorf("unknown format %s", userLsOutputFormat)
+	}
+}
 
+func userLsDefaultFormatter(users []*cache.IdentityExcerpt) error {
+	for _, user := range users {
 		fmt.Printf("%s %s\n",
-			colors.Cyan(i.Id.Human()),
-			i.DisplayName(),
+			colors.Cyan(user.Id.Human()),
+			user.DisplayName(),
 		)
 	}
 
 	return nil
 }
 
+func userLsJsonFormatter(users []*cache.IdentityExcerpt) error {
+	jsonUsers := make([]JSONIdentity, len(users))
+	for i, user := range users {
+		jsonUsers[i] = NewJSONIdentityFromExcerpt(user)
+	}
+
+	jsonObject, _ := json.MarshalIndent(jsonUsers, "", "    ")
+	fmt.Printf("%s\n", jsonObject)
+	return nil
+}
+
 var userLsCmd = &cobra.Command{
 	Use:     "ls",
 	Short:   "List identities.",
@@ -42,4 +75,6 @@ var userLsCmd = &cobra.Command{
 func init() {
 	userCmd.AddCommand(userLsCmd)
 	userLsCmd.Flags().SortFlags = false
+	userLsCmd.Flags().StringVarP(&userLsOutputFormat, "format", "f", "default",
+		"Select the output formatting style. Valid values are [default,json]")
 }