Disable autocompletion entirely when its not required

cmd/cmd.go

@@ -1231,7 +1231,7 @@ func completionHandler(cmd *cobra.Command, args []string) error {
 	case "fish":
 		err = cmd.Root().GenFishCompletion(os.Stdout, true)
 	default:
-		err = errors.New("unsupported shell")
+		err = errors.New("unsupported shell. Supported shells: zsh, fish, bash")
 	}
 	if err != nil {
 		fmt.Fprintf(os.Stderr, "error: %s\n", err)
@@ -1317,6 +1317,7 @@ func NewCLI() *cobra.Command {
 		Args:              cobra.ExactArgs(1),
 		PreRunE:           checkServerHeartbeat,
 		RunE:              CreateHandler,
+		ValidArgsFunction: doNotAutocomplete,
 	}
 
 	createCmd.Flags().StringP("file", "f", "Modelfile", "Name of the Modelfile (default \"Modelfile\")")
@@ -1356,6 +1357,7 @@ func NewCLI() *cobra.Command {
 		Short:             "Start ollama",
 		Args:              cobra.ExactArgs(0),
 		RunE:              RunServer,
+		ValidArgsFunction: doNotAutocomplete,
 	}
 
 	pullCmd := &cobra.Command{
@@ -1386,6 +1388,7 @@ func NewCLI() *cobra.Command {
 		Short:             "List models",
 		PreRunE:           checkServerHeartbeat,
 		RunE:              ListHandler,
+		ValidArgsFunction: doNotAutocomplete,
 	}
 
 	copyCmd := &cobra.Command{
@@ -1413,6 +1416,9 @@ func NewCLI() *cobra.Command {
 		Hidden:                true,
 		Args:                  cobra.ExactArgs(1),
 		RunE:                  completionHandler,
+		ValidArgsFunction: func(_ *cobra.Command, _ []string, toComplete string) ([]string, cobra.ShellCompDirective) {
+			return []string{"bash", "zsh", "fish"}, cobra.ShellCompDirectiveNoFileComp
+		},
 	}
 
 	rootCmd.AddCommand(