feat(530) make label commands consistent

1 files changed, 33 insertions, 0 deletions

diff --git a/commands/label_ls.go b/commands/label_ls.go
new file mode 100644
index 00000000..242eb00c
--- /dev/null
+++ b/commands/label_ls.go
@@ -0,0 +1,33 @@
+package commands
+
+import (
+	"github.com/spf13/cobra"
+)
+
+func newLabelLsCommand() *cobra.Command {
+	env := newEnv()
+
+	cmd := &cobra.Command{
+		Use:   "ls",
+		Short: "List valid labels.",
+		Long: `List valid labels.
+
+Note: in the future, a proper label policy could be implemented where valid labels are defined in a configuration file. Until that, the default behavior is to return the list of labels already used.`,
+		PreRunE: loadBackend(env),
+		RunE: closeBackend(env, func(cmd *cobra.Command, args []string) error {
+			return runLabelLs(env)
+		}),
+	}
+
+	return cmd
+}
+
+func runLabelLs(env *Env) error {
+	labels := env.backend.ValidLabels()
+
+	for _, l := range labels {
+		env.out.Println(l)
+	}
+
+	return nil
+}