New command shell completion

Author: dotzero

README.md

@@ -67,6 +67,54 @@ Import profile from JSON format
 cat home.json | xargs -0 git profile import home
 ```
 
+## Shell Completion
+
+Shell completion is available for `git-profile` command.
+
+**Note:** Use `git-profile TAB` instead of `git profile TAB` for completion.
+
+### Bash
+
+Requires [bash-completion](https://github.com/scop/bash-completion).
+
+```bash
+# Temporary (current session only)
+source <(git-profile completion bash)
+
+# Permanent (Linux)
+git-profile completion bash | sudo tee /etc/bash_completion.d/git-profile
+
+# Permanent (macOS)
+git-profile completion bash > $(brew --prefix)/etc/bash_completion.d/git-profile
+```
+
+### Zsh
+
+```bash
+# Create completion directory if it doesn't exist
+mkdir -p ~/.zsh/completions
+
+# Generate completion file
+git-profile completion zsh > ~/.zsh/completions/_git-profile
+
+# Add to ~/.zshrc if not already present
+echo 'fpath=(~/.zsh/completions $fpath)' >> ~/.zshrc
+echo "autoload -U compinit && compinit" >> ~/.zshrc
+
+# Reload shell
+source ~/.zshrc
+```
+
+### Fish
+
+```bash
+# Temporary (current session only)
+git-profile completion fish | source
+
+# Permanent
+git-profile completion fish > ~/.config/fish/completions/git-profile.fish
+```
+
 ## License
 
 http://www.opensource.org/licenses/mit-license.php

cmd/completion.go

@@ -0,0 +1,63 @@
+package cmd
+
+import (
+	"os"
+
+	"github.com/spf13/cobra"
+)
+
+// Completion returns `completion` command
+func Completion(rootCmd *cobra.Command) *cobra.Command {
+	return &cobra.Command{
+		Use:   "completion [bash|zsh|fish|powershell]",
+		Short: "Generate completion script",
+		Long: `Generate shell completion script for Git Profile.
+
+To load completions:
+
+Bash:
+
+  $ source <(git-profile completion bash)
+
+  # To load completions for each session, execute once:
+  # Linux:
+  $ git-profile completion bash > /etc/bash_completion.d/git-profile
+  # macOS:
+  $ git-profile completion bash > $(brew --prefix)/etc/bash_completion.d/git-profile
+
+Zsh:
+
+  # Create completion directory and generate file:
+  $ mkdir -p ~/.zsh/completions
+  $ git-profile completion zsh > ~/.zsh/completions/_git-profile
+
+  # Add to ~/.zshrc if not already present:
+  $ echo 'fpath=(~/.zsh/completions $fpath)' >> ~/.zshrc
+  $ echo 'autoload -U compinit && compinit' >> ~/.zshrc
+
+  # Reload shell or run: source ~/.zshrc
+
+Fish:
+
+  $ git-profile completion fish | source
+
+  # To load completions for each session, execute once:
+  $ git-profile completion fish > ~/.config/fish/completions/git-profile.fish
+`,
+		ValidArgs:             []string{"bash", "zsh", "fish", "powershell"},
+		Args:                  cobra.MatchAll(cobra.ExactArgs(1), cobra.OnlyValidArgs),
+		DisableFlagsInUseLine: true,
+		Run: func(cmd *cobra.Command, args []string) {
+			switch args[0] {
+			case "bash":
+				_ = rootCmd.GenBashCompletionV2(os.Stdout, true)
+			case "zsh":
+				_ = rootCmd.GenZshCompletion(os.Stdout)
+			case "fish":
+				_ = rootCmd.GenFishCompletion(os.Stdout, true)
+			case "powershell":
+				_ = rootCmd.GenPowerShellCompletionWithDesc(os.Stdout)
+			}
+		},
+	}
+}

cmd/root.go

@@ -80,6 +80,7 @@ func (c *Cmd) init() {
 
 	c.AddCommand(
 		Add(c.config),
+		Completion(&c.Command),
 		Current(c.config, c.git),
 		Del(c.config),
 		List(c.config),