cli-plugins: disable file-completion by default

This uses the DefaultShellCompDirective feature which was added
in cobra to override the default (which would complete to use
files for commands and flags).

Signed-off-by: Sebastiaan van Stijn <[email protected]>

Author: thaJeztah

cli-plugins/plugin/plugin.go

@@ -164,6 +164,11 @@ func newPluginCommand(dockerCli *command.DockerCli, plugin *cobra.Command, meta
 			DisableDescriptions: os.Getenv("DOCKER_CLI_DISABLE_COMPLETION_DESCRIPTION") != "",
 		},
 	}
+
+	// Disable file-completion by default. Most commands and flags should not
+	// complete with filenames.
+	cmd.CompletionOptions.SetDefaultShellCompDirective(cobra.ShellCompDirectiveNoFileComp)
+
 	opts, _ := cli.SetupPluginRootCommand(cmd)
 
 	cmd.SetIn(dockerCli.In())