#!/usr/bin/env bash
set -e
usage () {
  printf "usage: $(basename $0) <owner>[/]<repo>\n" >&2
  exit 1
}
already_exists () {
  printf "%s\n" "$2"
  exit 2
}
root=${GITLAB_ROOT:-"$HOME/src"}
owner="$1"
repo="$2"
[ -z "$owner" ] && usage
if [ -z "$repo" ]; then
  IFS='/' read -ra parsed <<< "$owner"
  owner="${parsed[0]}"
  repo="${parsed[1]}"
  if [ -z "$owner" ] || [ -z "$repo" ]; then
    usage
  fi
fi
dest="$root/$owner"
dir="$dest/$repo"
[ -d "$dir" ] && already_exists "$owner/$repo" "$dir"
mkdir -p "$dest"
cd "$dest"
git clone "git@gitlab.com:$owner/$repo"
git config \
    --file="$dir/.git/config" \
    --add remote.origin.fetch '+refs/pull/*/head:refs/pull/origin/*'
git config \
    --file="$dir/.git/config" \
    --add remote.origin.fetch '+refs/pull/*/merge:refs/merge/origin/*'
printf "%s\n" "$dest/$repo"