#!/bin/bash
set -o errexit
set -o nounset
set -o pipefail

local_dir=${1:-$PWD}
branch=${2:-gh-pages}
origin=$(git remote get-url origin)

temp_dir=$(mktemp --directory)
trap 'rm --force --recursive $temp_dir' EXIT
cp --archive --no-target-directory "$local_dir" "$temp_dir"

cd "$temp_dir"
rm --force --recursive "$temp_dir/.git"
git init
git remote add origin "$origin"
git checkout --orphan "$branch"
git add --all
git commit --message="ci: deploy to $branch"
git push --force origin "$branch"