Automatically rebase a collection of branches on upstream/master, run the tests, and push to origin if the tests pass

update-prs.sh

#!/bin/bash
set -euo pipefail
IFS=$'\n\t'

upstream='upstream/master'


if ! ( git diff --exit-code && git diff --cached --exit-code ) ; then
	echo "Working tree is dirty, aborting"
	exit 1
fi
git fetch upstream

for pr in $( cat pr-branches.txt ) ; do
	bpr=$( printf "\e[1;32m%s\e[0m" "${pr}" )
	echo "-----"
	echo "$bpr"
	git checkout -qf "$pr"
	initial_sha=$( git rev-parse "${pr}" )
	origin_sha=$( git rev-parse "origin/${pr}" )
	if ! git rebase -q "${upstream}" ; then
		git rebase --abort
		echo "Error while rebasing ${bpr} on ${upstream}"
		continue
	fi

	new_sha=$( git rev-parse "${pr}" )
	if [[ "${new_sha}" = "${origin_sha}" ]] ; then
		echo "up-to-date"
		continue
	fi

	test_output="test-$( echo "$pr" | tr '/' '-' ).log"

	echo "Running tests"
	if ./runtests.py &>"${test_output}" ; then
		echo "Tests passed! Pushing ${bpr} to origin"
		rm -f "${test_output}"
		git push origin -qf "${pr}"
	else
		echo "Tests failed! Check ${test_output}, fix ${bpr} yourself and try again"
	fi
done