add bash completion support for git-gerrit.

README.md

@@ -1,4 +1,4 @@
-# gerrit Tools
+# Gerrit Tools
 
 A few scripts to make code review via [Gerrit Code Review](http://gerrit.googlecode.com) easier for developers.
 They are improved and maintained to fit the needs of the [TYPO3](http://typo3.org) review workflow.
@@ -179,6 +179,36 @@ It will print "git-gerrit can only be run from a git repository." in red (unless
 
     brew install https://raw.github.com/fbzhong/homebrew-library/master/Library/gerrit-tools.rb
 
+
+## Bash Completion
+
+ Bash completion support for [git-gerrit](https://github.com/fbzhong/gerrit-tools)
+
+### Installation
+
+ To achieve git-gerrit completion nirvana:
+
+  0. Install git-completion.
+
+  1. Install this file. Either:
+
+     a. Place it in a `bash-completion.d` folder:
+
+        * /etc/bash-completion.d
+        * /usr/local/etc/bash-completion.d
+        * ~/bash-completion.d
+
+     b. Or, copy it somewhere (e.g. ~/.git-gerrit-completion.bash) and put the following line in
+        your .bashrc:
+
+            source ~/.git-gerrit-completion.bash
+
+  2. If you are using Git < 1.7.1: Edit git-completion.sh and add the following line to the giant
+     $command case in _git:
+
+         gerrit)        _git_gerrit ;;
+
+
 ## Contributing
 
 Feel free to fork and send a pull request if you think you've improved anything.

completion/git-gerrit-completion.bash

@@ -0,0 +1,81 @@
+#!bash
+#
+# git-gerrit-completion
+# ===================
+#
+# Bash completion support for [git-gerrit](https://github.com/fbzhong/gerrit-tools)
+#
+#
+# Installation
+# ------------
+#
+# To achieve git-gerrit completion nirvana:
+#
+#  0. Install git-completion.
+#
+#  1. Install this file. Either:
+#
+#     a. Place it in a `bash-completion.d` folder:
+#
+#        * /etc/bash-completion.d
+#        * /usr/local/etc/bash-completion.d
+#        * ~/bash-completion.d
+#
+#     b. Or, copy it somewhere (e.g. ~/.git-gerrit-completion.bash) and put the following line in
+#        your .bashrc:
+#
+#            source ~/.git-gerrit-completion.bash
+#
+#  2. If you are using Git < 1.7.1: Edit git-completion.sh and add the following line to the giant
+#     $command case in _git:
+#
+#         gerrit)        _git_gerrit ;;
+#
+#
+# The Fine Print
+# --------------
+#
+# Copyright (c) 2012 [Fubai Zhong](https://github.com/fbzhong)
+#
+# Distributed under the [MIT License](http://creativecommons.org/licenses/MIT/)
+#
+# Credit
+# --------------
+#
+# Thank [Justin Hileman](http://justinhileman.com) for https://github.com/bobthecow/git-flow-completion/
+#
+
+_git_gerrit ()
+{
+	local subcommands="init merge push changes apply reset update rebase diff review submit abandon"
+	local subcommand="$(__git_find_on_cmdline "$subcommands")"
+	if [ -z "$subcommand" ]; then
+		__gitcomp "$subcommands"
+		return
+	fi
+
+	case "$subcommand" in
+	merge)
+		__git_gerrit_merge
+		return
+		;;
+	*)
+		COMPREPLY=()
+		;;
+	esac
+}
+
+__git_gerrit_merge ()
+{
+	__gitcomp "$(__git_gerrit_list_branches)"
+}
+
+__git_gerrit_list_branches ()
+{
+	git branch  2>/dev/null | grep -v '*' | sort
+}
+
+# alias __git_find_on_cmdline for backwards compatibility
+if [ -z "`type -t __git_find_on_cmdline`" ]; then
+	alias __git_find_on_cmdline=__git_find_subcommand
+fi