#!/usr/bin/env bash
set -eo pipefail

# --------------------------------------------------------------------
# Script that sets up git remote in dotfiles directory.
#
# Optional arguments:
#   GITHUB_AUTHOR: GitHub author of repository
#    Defaults to "andrejusk"
#   GITHUB_REPOSITORY: GitHub repository name
#    Defaults to "dotfiles"
#   GITHUB_BRANCH: GitHub branch name
#    Defaults to "master"
#  DOTFILES_DIR: Directory where dotfiles are installed
#    Defaults to parent directory of this script
#

echo "============================================================"
echo "Running \"$(basename "$0")\" at \"$(date)\""
echo "Running as \"$(whoami)\" on \"$(hostname)\""
echo "============================================================"

dir=${DOTFILES_DIR:-$(dirname "$0")}
dir=$(realpath "$dir/..")

author=${GITHUB_AUTHOR:-andrejusk}
repository=${GITHUB_REPOSITORY:-dotfiles}
branch=${GITHUB_BRANCH:-master}

echo "Using GitHub repository \"$author/$repository\" at \"$branch\""
echo "Using dotfiles directory \"$dir\""
echo "<<< git logs"
printf "\n"

git -C $dir init
git -C $dir remote add origin "git@github.com:$author/$repository.git"
git -C $dir fetch origin $branch
git -C $dir reset --hard FETCH_HEAD
git -C $dir branch --set-upstream-to=origin/$branch $branch
git -C $dir pull --rebase

unset dir author repository branch

printf "\n"
echo ">>> git logs"
echo "Done!"