Merge pull request #301 from vdemeester/add-completion-cmd

Add a completion sub-command to generate completion for bash

Author: silvin-lubecki

README.md

@@ -225,9 +225,9 @@ Usage:
   docker-app [command]
 
 Available Commands:
+  completion  Generates bash completion scripts
   deploy      Deploy or update an application
   helm        Generate a Helm chart
-  help        Help about any command
   init        Start building a Docker application
   inspect     Shows metadata and settings for a given application
   ls          List applications.

cmd/docker-app/completion.go

@@ -0,0 +1,25 @@
+package main
+
+import (
+	"github.com/docker/cli/cli/command"
+	"github.com/spf13/cobra"
+)
+
+func completionCmd(dockerCli command.Cli, rootCmd *cobra.Command) *cobra.Command {
+	return &cobra.Command{
+		Use:   "completion",
+		Short: "Generates bash completion scripts",
+		Long: `To load completion run
+
+. <(docker-app completion)
+
+To configure your bash shell to load completions for each session add to your bashrc
+
+# ~/.bashrc or ~/.profile
+. <(docker-app completion)
+`,
+		Run: func(cmd *cobra.Command, args []string) {
+			rootCmd.GenBashCompletion(dockerCli.Out())
+		},
+	}
+}

cmd/docker-app/root.go

@@ -54,6 +54,7 @@ func addCommands(cmd *cobra.Command, dockerCli command.Cli) {
 		splitCmd(),
 		validateCmd(),
 		versionCmd(dockerCli),
+		completionCmd(dockerCli, cmd),
 	)
 	if internal.Experimental == "on" {
 		cmd.AddCommand(