#!/bin/bash
set -e

release=$(curl -L https://api.github.com/repos/discourse/discourse/tags -s | jq -r '.[0].name')

echo "Warning, this scipt is not fully tested yet! Proceed with caution!"
echo
read -p "Trying to update to Discourse ${release} – proceed?" -n 1 -r
echo
if [[ ! $REPLY =~ ^[Yy]$ ]]
then
    [[ "$0" = "$BASH_SOURCE" ]] && exit 1 || return 1  # https://stackoverflow.com/questions/1885525/how-do-i-prompt-a-user-for-confirmation-in-bash-script
fi
echo

basedir=$HOME/discourse
services="sidekiq discourse"
patch=$HOME/latest.patch
# not clear why this is a samplefile
# they seem to do this by hand on the docker repo
#rubyver=$(< $basedir/.ruby-version.sample)
rubyver=$(curl -s https://raw.githubusercontent.com/discourse/discourse_docker/main/image/base/slim.Dockerfile | grep -oP '(?<=RUBY_VERSION=)[0-9]+\.[0-9]+\.[0-9]+')
nodever=$(curl -s https://raw.githubusercontent.com/discourse/discourse_docker/main/image/base/slim.Dockerfile | grep -oP '(?<=nodesource.com/setup_)[0-9]+[0-9]')

cd $basedir

git fetch -q

# attempting not having to use a patchfile
git stash
git checkout $(git tag -l | grep -v 'rc[0-9]*$' | sort -V | tail -n 1)
git stash apply

# failsafe if stash apply causes too much trouble
#echo "looking for patchfile at [ $patch ], executing if found..."
#[ -e $patch ] && . $patch
#echo "command ended with status $?"

#echo ~/.rbenv/versions/$rubyver

if [[ ! -e ~/.rbenv/versions/$rubyver ]]
then
    git -C $HOME/.rbenv/plugins/ruby-build pull
    RUBY_CONFIGURE_OPTS=--with-jemalloc rbenv install
fi

echo "proceeding with bundle and yarn"
# upstream does a gem update --system
# we assume their Gemfile.lock is on track tho
# and try to avoid problems due to too new gems
bundle install
yarn install --frozen-lockfile

RAILS_ENV=production bundle exec rails assets:precompile

read -p "Proceed with migrations? " -n 1 -r
if [[ ! $REPLY =~ ^[Yy]$ ]]
then
    [[ "$0" = "$BASH_SOURCE" ]] && exit 1 || return 1
fi
RAILS_ENV=production bundle exec rails db:migrate

systemctl restart --user $services

sleep 2

systemctl status --user $services