[PATCH] _git: Add completion for help subcommand

[Aaron Schrab <aaron@schrab.com>]

---
 Completion/Unix/Command/_git |   14 ++++++++++++++
 1 files changed, 14 insertions(+), 0 deletions(-)

diff --git a/Completion/Unix/Command/_git b/Completion/Unix/Command/_git
index c394e08..50b503a 100644
--- a/Completion/Unix/Command/_git
+++ b/Completion/Unix/Command/_git
@@ -190,6 +190,7 @@ _git_commands () {
     'fetch:download objects and a head from another repository'
     'gc:cleanup unnecessary files and optimize the local repository'
     'grep:print lines matching a pattern'
+    'help:display help information about git subcommands'
     'init:create empty git object database'
     'log:show commit logs'
     'merge:grand unified merge driver'
@@ -490,6 +491,19 @@ _git-hash-object () {
     '(--stdin):file:_files' && ret=0
 }
 
+(( $+functions[_git-help] )) ||
+_git-help () {
+  local formats='(--info -i --man -m --web -w)'
+  _arguments -S \
+    - '(all)' \
+    {--all,-a}'[List all available commands]' \
+    - 'format' \
+    "$formats"{--man,-m}'[Display help in man page format]' \
+    "$formats"{--info,-i}'[Display help in info format]' \
+    "$formats"{--web,-w}'[Display help in web browser]' \
+    ':command:_git_commands' && ret=0
+}
+
 (( $+functions[_git-index-pack] )) ||
 _git-index-pack () {
   local -a stdin_arguments
-- 
1.7.1