#!/usr/bin/env sh

export GITHUB_UPSTREAM="$(git remote -vv | awk '{$0=$2}')"

git log --merges --ancestry-path --oneline $1..master \
	| grep -i 'pull request' \
	| tail -n1 \
	| awk '{$0=$5}' \
	| cut -c2- \
	| xargs -I % open https://github.com/$GITHUB_UPSTREAM/${PWD##*/}/pull/%