Clone GitHub forked repo and add upstream remote

github-clone-fork

#!/bin/bash

set -e

fatal() {
	echo $@
	exit 1
}

repo=$1

[[ "$repo" == https://github* ]] && repo=$(echo "$repo" | cut -d/ -f4-)
[[ "$repo" == *.git ]] && repo=$(echo "$repo" | cut -d. -f1)

data=$(curl -s "https://api.github.com/repos/$repo")

jqget() {
	echo "$data" | jq -r "$1"
}

[[ $(jqget .fork) == true ]] || fatal not a fork

origin=$(jqget .ssh_url)
upstream=$(jqget .parent.clone_url)
name=$(jqget .name)

target=${2:-$name}

origin="git clone $origin $2"
upstream="git -C $target remote add upstream $upstream"

echo 'Will execute:'
echo "  $origin"
echo "  $upstream"
echo
read -n 1 -p 'Continue? ' yesno
echo

case $yesno in
y*|Y*)
	$origin
	$upstream	
	git -C "$target" remote -v
	;;
esac