Allows you to rebase a pull request for example

gitreqrebase

#!/bin/bash

git remote | grep upstream > /dev/null 2>&1
if [ "$?" -ne 0 ]; then
  echo This script assumes you have upstream set as the repo to hand reqs in
  exit
fi

if [ ! -d .git ]; then
  echo This script assumes you are in the root of a repo clone
  exit
fi

if [ $# -lt 2 ]
then
  echo "Need pull number and branch"
  exit
fi

git status | grep "Untracked\|Changes not staged"
if [ $? -eq 0 ]; then
  echo Ensure working $2 is clean before applying
  exit -1
fi

upstreamname=`git remote -v | grep upstream | grep fetch | sed "s#upstream.*github.com[:/]\(.*\)/.*#\1#"`
reponame=`git remote -v | grep origin | grep push | sed "s#.*/\(.*\)\.git.*#\1#g"`

gitreqnumber=$1
shift

rm -f $gitreqnumber
wget --no-check-certificate https://github.com/$upstreamname/$reponame/pull/$gitreqnumber -O $gitreqnumber
if [ $? -ne 0 ]; then
  echo "Could not download pull req info"
  exit -1
fi

username=$(grep "by .* · Pull" $pullNumber | sed 's#.*by \(.*\) · Pull.*#\1#')
git remote -v | grep origin | grep $username > /dev/null 2>&1
if [ "$?" -ne 0 ]; then
  echo "This is not one of your pull requests"
  rm $gitreqnumber
  exit 0
fi

branchname=$(grep "span.*$username.*css-truncate-target" $gitreqnumber | sed 's#.*">\(.*\)<.*#\1#')
expr length $branchname > /dev/null 2>&1
if [ "$?" -ne 0 ]; then
  echo "Could not find branch name, assuming first word of title!"
  branchname=$(grep "<title>" 1 | sed 's#.*<title>\([a-zA-Z0-9\-]*\) .*#\1#')
  expr length $branchname > /dev/null 2>&1
  if [ "$?" -ne 0 ]; then
    echo "Could not find branch name, aborting"
    rm $gitreqnumber
    exit -1
  fi
fi

rm $gitreqnumber

upstreamBranch=$1
shift

git status | grep "Untracked\|Changes not staged"
if [ $? -eq 0 ]; then
  echo Ensure working $upstreamBranch is clean before applying
  exit -1
fi

git checkout $branchname
if [ "$?" -ne 0 ]; then
  echo "Branch $branchname did not exist"
  exit -1
fi

git fetch upstream
echo "Trying to rebase $branchname against $upstreamBranch"
git pull --rebase --ff-only upstream $upstreamBranch
if [ $? -ne 0 ]; then
  git rebase --abort
  echo "Could not perform rebase"
  exit -1
fi

echo "Attempting to push"
git push origin $branchname "$@"
if [ $? -ne 0 ]; then
  echo "Could not push to upstream"
  exit -1
fi