Add clone command

Used RunE instead of Run, make adjustments to rootCmd so that we control
how error messages are printed (in main())

pkg/cli/cmd.go

@@ -36,6 +36,7 @@ func init() {
 	renameCmd.Flags().Bool("generate", false, "Generate a conversation title")
 
 	rootCmd.AddCommand(
+		cloneCmd,
 		continueCmd,
 		editCmd,
 		lsCmd,
@@ -101,6 +102,17 @@ func lookupConversation(shortName string) *Conversation {
 	return c
 }
 
+func lookupConversationE(shortName string) (*Conversation, error) {
+	c, err := store.ConversationByShortName(shortName)
+	if err != nil {
+		return nil, fmt.Errorf("Could not lookup conversation: %v", err)
+	}
+	if c.ID == 0 {
+		return nil, fmt.Errorf("Conversation not found with short name: %s", shortName)
+	}
+	return c, nil
+}
+
 // handleConversationReply handles sending messages to an existing
 // conversation, optionally persisting them. It displays the entire
 // conversation before
@@ -161,8 +173,10 @@ func inputFromArgsOrEditor(args []string, placeholder string, existingMessage st
 }
 
 var rootCmd = &cobra.Command{
-	Use:  "lmcli",
-	Long: `lmcli - command-line interface with Large Language Models.`,
+	Use:           "lmcli <command> [flags]",
+	Long:          `lmcli - Large Language Model CLI`,
+	SilenceErrors: true,
+	SilenceUsage:  true,
 	Run: func(cmd *cobra.Command, args []string) {
 		// execute `lm ls` by default
 	},
@@ -314,6 +328,66 @@ var rmCmd = &cobra.Command{
 	},
 }
 
+var cloneCmd = &cobra.Command{
+	Use:   "clone <conversation>",
+	Short: "Clone conversations.",
+	Long:  `Clones the provided conversation.`,
+	Args: func(cmd *cobra.Command, args []string) error {
+		argCount := 1
+		if err := cobra.MinimumNArgs(argCount)(cmd, args); err != nil {
+			return err
+		}
+		return nil
+	},
+	RunE: func(cmd *cobra.Command, args []string) error {
+		shortName := args[0]
+		toClone, err := lookupConversationE(shortName)
+		if err != nil {
+			return err
+		}
+
+		messagesToCopy, err := store.Messages(toClone)
+		if err != nil {
+			return fmt.Errorf("Could not retrieve messages for conversation: %s", toClone.ShortName.String)
+		}
+
+		clone := &Conversation{
+			Title: toClone.Title + " - Clone",
+		}
+		if err := store.SaveConversation(clone); err != nil {
+			return fmt.Errorf("Cloud not create clone: %s", err)
+		}
+
+		var errors []error
+		messageCnt := 0
+		for _, message := range messagesToCopy {
+			newMessage := message
+			newMessage.ConversationID = clone.ID
+			newMessage.ID = 0
+			if err := store.SaveMessage(&newMessage); err != nil {
+				errors = append(errors, err)
+			} else {
+				messageCnt++
+			}
+		}
+
+		if len(errors) > 0 {
+			return fmt.Errorf("Messages failed to be cloned: %v", errors)
+		}
+
+		fmt.Printf("Cloned %d messages to: %s\n", messageCnt, clone.Title)
+
+		return nil
+	},
+	ValidArgsFunction: func(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
+		compMode := cobra.ShellCompDirectiveNoFileComp
+		if len(args) != 0 {
+			return nil, compMode
+		}
+		return store.ConversationShortNameCompletions(toComplete), compMode
+	},
+}
+
 var viewCmd = &cobra.Command{
 	Use:   "view <conversation>",
 	Short: "View messages in a conversation",