Add --keys flag to config list command to show only config keys

CHANGELOG.md

@@ -8,6 +8,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 - `config` command to get and set configuration options.
 - `config list|ls` command to list configuration options.
+  - `--keys` flag to show only config keys.
 - `endpoint list|ls` command to print the endpoints list as a table.
   - `--format` flag to format output using a Go template.
 - `stack list|ls` command to print the stacks list as a table.

Dockerfile

@@ -3,6 +3,7 @@ FROM alpine
 ENV PSU_AUTHENTICATION_PASSWORD="" \
   PSU_AUTHENTICATION_USER="" \
   PSU_CONFIG="" \
+  PSU_CONFIG_LIST_KEYS="" \
   PSU_CONNECTION_INSECURE="" \
   PSU_CONNECTION_TIMEOUT="" \
   PSU_CONNECTION_URL="" \

cmd/configList.go

@@ -20,13 +20,21 @@ var configListCmd = &cobra.Command{
 			return keys[i] < keys[j]
 		})
 
-		// List keys and values
 		for _, key := range keys {
-			fmt.Printf("%s: %v\n", key, viper.Get(key))
+			if viper.GetBool("config.list.keys") {
+				// List config key
+				fmt.Println(key)
+			} else {
+				// List config key and value
+				fmt.Printf("%s: %v\n", key, viper.Get(key))
+			}
 		}
 	},
 }
 
 func init() {
 	configCmd.AddCommand(configListCmd)
+
+	configListCmd.Flags().Bool("keys", false, "list only keys")
+	viper.BindPFlag("config.list.keys", configListCmd.Flags().Lookup("keys"))
 }