#!/usr/bin/env bash

set -e

# https://stackoverflow.com/a/44036486/558561
function create_all_branches() {
	# Keep track of where Travis put us.
	# We are on a detached head, and we need to be able to go back to it.
	local build_head
	build_head=$(git rev-parse HEAD)

	# Fetch all the remote branches. Travis clones with `--depth`, which
	# implies `--single-branch`, so we need to overwrite remote.origin.fetch to
	# do that.
	git config --replace-all remote.origin.fetch +refs/heads/*:refs/remotes/origin/*
	git fetch
	# optionally, we can also fetch the tags
	git fetch --tags

	# create the tacking branches
	for branch in $(git branch -r | grep -v HEAD); do
		git checkout -qf "${branch#origin/}"
	done

	# finally, go back to where we were at the beginning
	git checkout "${build_head}"
}

create_all_branches