little merge helper script. might need a finishing touch

github-merge-helper.sh

#!/bin/sh

# Function to fetch and merge a pull reqest
# Call with param1 == remote, param2 == Number
function merge_pull_request {
  echo "Now fetching and merging pull-request $2 (from remote $1)"
  git fetch $1 +refs/pull/$2/head:refs/remotes/$1/pr/$2
  [[ $? -eq 0 ]] || exit 1
  git merge $1/pr/$2
  [[ $? -eq 0 ]] || exit 1
}

[[ -d .git ]] || exit 1

if echo $1 | egrep -s "^([[:alnum:]_-]+)#([[:digit:]]+)$" ; then
  remote=`echo $1 | sed -r 's@([[:alnum:]_-]+)#([[:digit:]]+)@\1@'`
  PR=`echo $1 | sed -r 's@([[:alnum:]_-]+)#([[:digit:]]+)@\3@'`

  merge_pull_request $remote $PR
elif echo $1 | egrep -s "^([[:alnum:]_-]+)/([[:alnum:]_-]+)$" ; then
  remote=`echo $1 | sed -r 's@([[:alnum:]_-]+)/([[:alnum:]_-]+)@\1@'`
  branch=`echo $1 | sed -r 's@([[:alnum:]_-]+)/([[:alnum:]_-]+)@\2@'`

  git fetch $remote
  git merge $remote/$branch
elif echo $1 | egrep -s "^([[:alnum:]_-]+)$" ; then
  git merge $1
fi