Script for backporting OpenStack branches

bp.sh

#!/usr/bin/env bash
# This is a little script to make backporting patches to milestone proposed.
# Instructions
# ------------
# Make sure that milestone-proposed exists and is up to date:
#   git branch -D milestone-proposed
#   git checkout -b milestone-proposed origin/milestone-proposed
#   git pull
# Grab the file and stick it in your <project> directory:
#   curl -OL https://raw.github.com/gist/2206428/bp.sh
# Make sure the script is runnable:
#   chmod 755 bp.sh
# Start backporting reviews:
#   ./bp.sh <review_number>

if [ -z "$1" ]; then
    echo "Usage: $0 <review_number>"
    exit 1
fi

git review -d $1
git checkout milestone-proposed
git checkout -b bp-$1
git cherry-pick HEAD@{2}
git review milestone-proposed
REMOTE=`git remote show gerrit -n | grep Fetch | cut -d'/' -f3`
PORT=`echo $REMOTE | cut -d':' -f2`
HOST=`echo $REMOTE | cut -d':' -f1`
SHA=`git show-ref HEAD | cut -d' ' -f1`
echo "Use the following line to approve the review"
echo "ssh -p $PORT $HOST gerrit approve --submit $SHA"