#!/bin/bash

# Deploys the Hugo build into GitHub Pages.

# ANSI color codes
red="\u001b[31m"
green="\u001b[32m"
reset="\u001b[0m"

error_log() {
    printf "$red An error occurred on line $1\n $reset"
}

target_branch="gh-pages"
default_branch="master"
main_remote_alias="origin"
build_directory="public/"

trap 'error_log $LINENO' ERR

# Cleaning up the build site
printf "Deleting older version of the site"
git worktree remove $build_directory --force
git worktree prune
git branch -D $target_branch

# Building the worktree for the target branch
# https://git-scm.com/docs/git-worktree
echo "Checking out $target_branch branch into public"
git checkout --orphan $target_branch
git reset --hard
git commit --allow-empty -m "Initialize $target_branch branch."
git checkout $default_branch
git worktree add $build_directory $target_branch

# Building the site
printf "Building the site"
hugo

# Pushing the build into the pages branch
printf "$green -> Deploying page to GitHub...$reset\n"
cd $build_directory   
git add --all
git commit -m "Deploying site to branch $target_branch."

git push --force $main_remote_alias $target_branch