git pull request workflow

git-pr

!/bin/bash

PULL_REQUEST_TEMPLATE="\n# Please enter the message for your pull request. Lines starting\n# with '#' will be ignored, and an empty message aborts the commit.\n# On branch %s"

branch=$(git rev-parse --abbrev-ref HEAD);
if [ "$branch" = "master" ]; then
  echo "Cannot create pull request on master branch";
  exit 1;
fi

dirty=$(git diff-index --name-only HEAD --);
if [ -n "$dirty" ]; then
  git commit -a;
  if [ $? -ne 0 ]; then
    echo "Cancelling pull request";
    exit 1;
  fi
fi
message=$(git log -1 --format="%s");

git push origin $branch 2> /dev/null

if [ $? -ne 0 ]; then
  echo "Aborting pull request. Failed to push branch to origin.";
  exit 1;
fi

tmpmsg=$(mktemp /tmp/GIT_PULL_REQUEST_MESSAGE.XXXXXX);
echo $message > $tmpmsg
printf "$PULL_REQUEST_TEMPLATE" "$branch" >> $tmpmsg
vim -c "set syntax=gitcommit" $tmpmsg;
if [ $? -ne 0 ]; then
  echo "Cancelling pull request";
  exit 1;
fi

message=$(sed 's:^#.*$::g' "$tmpmsg");
url=$(echo "$message" | hub pull-request -F -);
exit_status=$?
rm $tmpmsg > /dev/null

if [ $exit_status -eq 0 ]; then
  echo $url | pbcopy;
  echo "Pull request created. Copied URL $url";
  exit 0;
else
  echo "Cancelling pull request";
  exit 1;
fi