#!/usr/bin/env bash

mkdir upstream ghc

cd upstream
git init
echo content > file
git add file
git commit -a -m initial

cd ..
git clone upstream ghc
cd ghc
echo fix1 > file
git commit -a -m fix1

cd ../upstream
echo fix2 > file
git commit -a -m fix2

cd ../ghc
git pull --no-edit "$@"

cd ../upstream
echo feature1 > file
git commit -a -m feature1

cd ../ghc
git pull --no-edit "$@"

cd ../upstream
echo feature2 > file
git commit -a -m feature2

cd ../ghc
git pull --no-edit "$@"