From b6f8649496b435a1675754ec052ffd72e27cb1d1 Mon Sep 17 00:00:00 2001
From: Osman Currim <osman.currim@groupbyinc.com>
Date: Sun, 8 Dec 2013 02:40:09 -0500
Subject: [PATCH] Add bash completion support for "brew switch"

First autocompletes on the names of installed packages and then
autocompletes on available versions for that specific package

Closes Homebrew/homebrew#25051.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
---
 Library/Contributions/brew_bash_completion.sh | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/Library/Contributions/brew_bash_completion.sh b/Library/Contributions/brew_bash_completion.sh
index b6dfe18a5e..886c52ce3e 100644
--- a/Library/Contributions/brew_bash_completion.sh
+++ b/Library/Contributions/brew_bash_completion.sh
@@ -88,6 +88,23 @@ __brew_complete_outdated ()
     COMPREPLY=($(compgen -W "$od" -- "$cur"))
 }
 
+__brew_complete_versions ()
+{
+    local formula="$1"
+    local versions=$(brew list --versions "$formula")
+    local cur="${COMP_WORDS[COMP_CWORD]}"
+    COMPREPLY=($(compgen -W "$versions" -X "$formula" -- "$cur"))
+}
+
+_brew_switch ()
+{
+    case "$COMP_CWORD" in
+    2)  __brew_complete_installed ;;
+    3)  __brew_complete_versions "${COMP_WORDS[COMP_CWORD-1]}" ;;
+    *)  ;;
+    esac
+}
+
 __brew_complete_tapped ()
 {
     __brewcomp "$(\ls $(brew --repository)/Library/Taps 2>/dev/null | sed 's/-/\//g')"
@@ -458,6 +475,7 @@ _brew ()
     outdated)                   _brew_outdated ;;
     pin)                        __brew_complete_formulae ;;
     search|-S)                  _brew_search ;;
+    switch)                     _brew_switch ;;
     tap)                        _brew_complete_tap ;;
     uninstall|remove|rm)        _brew_uninstall ;;
     unpin)                      __brew_complete_formulae ;;