Add demmer's git-prune-branches script

Author: unixorn

README.md

@@ -110,6 +110,7 @@ git clone this repository, then add it to your `$PATH`. Nothing here actually re
 * git-object-deflate - Ryan Tomayko's [dotfiles](https://github.com/rtomayko/dotfiles)
 * git-outgoing - Michael Markert's [dotfiles](https://github.com/cofi/dotfiles)
 * git-promote - Trevor's [Improving My git Workflow](http://hoth.entp.com/2008/11/10/improving-my-git-workflow) blog post
+* git-prune-branches - Michael Demmer in [jut-io/git-scripts](https://github.com/jut-io/git-scripts/blob/master/bin/git-prune-branches)
 * git-publish - Michael Markert's [dotfiles](https://github.com/cofi/dotfiles)
 * git-purge-from-history - David Underhill’s [blog](http://dound.com/2009/04/git-forever-remove-files-or-folders-from-history/)
 * git-rank-contributors - William Morgan <wmorgan-git-wt-add@masanjin.net>

git-prune-branches

@@ -0,0 +1,49 @@
+#!/bin/sh
+#
+# git-prune-branches
+#
+# Simple script that cleans up unnecessary branches.
+#
+# First it deletes each fully merged branch after prompting
+# for confirmation.
+#
+# Then it prunes all branches that no longer exist at each upstream
+# remote.
+
+merged=`git branch --no-color --merged master | grep -v master | sed 's/\*/ /'`
+
+if [ ! -z "$merged" ] ; then
+    echo "Deleting the following merged branches:"
+    for branch in $merged ; do
+	echo "    " $branch
+    done
+
+    all=n
+    delete=n
+    for branch in $merged ; do
+	if [ $all = 'n' ] ; then
+            delete=n
+            read -p "Delete $branch (y=yes, n=no, a=all)? " prompt
+	    echo "all=$all delete=$delete prompt=$prompt"
+            if [ "$prompt" = 'a' ] ; then
+		delete=y
+		all=y
+	    elif [ "$prompt" = 'y' ]; then
+		delete=y
+	    fi
+	fi
+
+	if [ "$delete" = 'y' ] ; then
+	    git branch -d $branch
+	fi
+    done
+fi
+	    
+remotes=`git remote`
+for remote in $remotes ; do
+    prompt=n
+    read -p "Prune deleted branches from remote '$remote' (y=yes n=no)? " prompt
+    if [ "$prompt" = 'y' ] ; then
+	git remote prune $remote
+    fi
+done