#!/usr/bin/env bash
{ set +x; } 2>/dev/null

usage() {
    echo "usage: $(basename $0) path" 1>&2
    [[ $1 == "-h" ]] || [[ $1 == "--help" ]]; exit
}

[[ $1 == "-h" ]] || [[ $1 == "--help" ]] && usage "$@"

[[ $# != 1 ]] && usage

cd "$1" || exit
! [ -e .git ] && exit
! [ -e .git/config ] && exit
url="$(git remote -v | grep gist.github.com | head -1 | awk '{print $2}')"
[[ -z "$url" ]] && exit

# https://gist.github.com/<id>.git
[[ "$url" == "https"* ]] && echo "$url" | awk -F":" '{print $2}' | sed 's/.\{4\}$//' && exit

# git@gist.github.com:<id>.git
[[ "$url" == "git@"* ]] && echo "$url" | awk -F":" '{print $2}' | sed 's/.\{4\}$//' && exit
echo "ERROR: $url" 1>&2 && exit 1
