Merge pull request #327 from ozzieba/bash_completion

Add shell completion

README.md

@@ -331,6 +331,31 @@ eksctl apply --cluster-config advanced-cluster.yaml
 ```
 -->
 
+### Shell Completion
+
+To enable bash completion, run the following, or put it in `~/.bashrc` or `~/.profile`:
+```
+. <(eksctl completion bash)
+```
+
+Or for zsh, run:
+```
+mkdir -p ~/.zsh/completion/
+eksctl completion zsh > ~/.zsh/completion/_eksctl
+```
+and put the following in `~/.zshrc`:
+```
+fpath=($fpath ~/.zsh/completion)
+```
+Note if you're not running a distribution like oh-my-zsh you may first have to enable autocompletion:
+```
+autoload -U compinit
+compinit
+```
+
+To make the above persistent, run the first two lines, and put the
+
+
 ## Project Roadmap
 
 ### Developer use-case (0.2.0)

cmd/eksctl/main.go

@@ -6,6 +6,7 @@ import (
 
 	"github.com/kubicorn/kubicorn/pkg/logger"
 	"github.com/spf13/cobra"
+	"github.com/weaveworks/eksctl/pkg/ctl/completion"
 	"github.com/weaveworks/eksctl/pkg/ctl/create"
 	"github.com/weaveworks/eksctl/pkg/ctl/delete"
 	"github.com/weaveworks/eksctl/pkg/ctl/get"
@@ -45,4 +46,5 @@ func addCommands() {
 	rootCmd.AddCommand(get.Command())
 	rootCmd.AddCommand(scale.Command())
 	rootCmd.AddCommand(utils.Command())
+	rootCmd.AddCommand(completion.Command(rootCmd))
 }

pkg/ctl/completion/completion.go

@@ -0,0 +1,61 @@
+package completion
+
+import (
+	"os"
+
+	"github.com/kubicorn/kubicorn/pkg/logger"
+
+	"github.com/spf13/cobra"
+)
+
+// Command will create the `completion` commands
+func Command(rootCmd *cobra.Command) *cobra.Command {
+	var bashCompletionCmd = &cobra.Command{
+		Use:   "bash",
+		Short: "Generates bash completion scripts",
+		Long: `To load completion run
+
+. <(eksctl completion bash)
+
+To configure your bash shell to load completions for each session add to your bashrc
+
+# ~/.bashrc or ~/.profile
+. <(eksctl completion bash)
+`,
+		Run: func(cmd *cobra.Command, args []string) {
+			rootCmd.GenBashCompletion(os.Stdout)
+		},
+	}
+	var zshCompletionCmd = &cobra.Command{
+		Use:   "zsh",
+		Short: "Generates zsh completion scripts",
+		Long: `To configure your zsh shell, run:
+
+mkdir -p ~/.zsh/completion/
+eksctl completion zsh > ~/.zsh/completion/_eksctl
+
+and put the following in ~/.zshrc:
+
+fpath=($fpath ~/.zsh/completion)
+
+`,
+		Run: func(cmd *cobra.Command, args []string) {
+			rootCmd.GenZshCompletion(os.Stdout)
+		},
+	}
+
+	cmd := &cobra.Command{
+		Use:   "completion",
+		Short: "Generates shell completion scripts",
+		Run: func(c *cobra.Command, _ []string) {
+			if err := c.Help(); err != nil {
+				logger.Debug("ignoring error %q", err.Error())
+			}
+		},
+	}
+
+	cmd.AddCommand(bashCompletionCmd)
+	cmd.AddCommand(zshCompletionCmd)
+
+	return cmd
+}