#!/bin/bash
# A script for automatically updating the elasticsearch AUR package by checking the project's releases on github
# Jared Johnstone
# # Sat 29 Jul 2023 11:05:59 AEST
set -o pipefail
files=(PKGBUILD .SRCINFO)

githubProject="elastic/elasticsearch"

. PKGBUILD || { echo "This script must be placed and run in the AUR package dir" ; exit 1;}

git status >/dev/null 2>&1 || { echo "This script is not suitable for running outside of a git repository." ; exit 1 ;}

githubBaseurl="https://api.github.com/repos"
githubLatestRelease="$(curl -Ss ${githubBaseurl}/${githubProject}/releases/latest)" || { echo "Failed fetching latest release info from github" ; exit 1;}
latestRel=$(jq -r .tag_name <<< ${githubLatestRelease} | tr -d [a-z]) || { echo "Failed to read latest version" ; exit 1;}

latestTarUrl="https://github.com/${githubProject}/archive/v${latestRel}.tar.gz"

compareString="(pkgver=${pkgver}, latestRel=${latestRel})"

# Check if latest tag is equal or greater to the current version
if printf '%s\n%s\n' "${latestRel}" "${pkgver}" | sort --check=quiet --version-sort 
then
  echo "No newer version detected. ${compareString}"
  exit
else
  echo "New version detected. ${compareString}"
  echo "Downloading latest release to generate a replacement b2sum..."
  newB2sum="$(curl -L --progress-meter "${latestTarUrl}" | b2sum | cut -f1 -d' ')" || { echo "Failed to download the archive for checksumming" ; exit 1;}
  oldB2sum="${b2sums[0]}"

    # Update version vars, B2sums and pkgrel
  sed -i -E -e "s/${pkgver//./\\.}/${latestRel}/g" \
            -e "s/${oldB2sum}/${newB2sum}/g" ${files[@]} \
            -e 's/pkgrel=[0-9]+/pkgrel=1/g' -e 's/pkgrel = [0-9]+/pkgrel = 1/g' \
  ${files[@]}

  makepkg --verifysource || { echo "Unable to verify sources, please verify checksums."; exit 1;}
  git add ${files[@]}
  echo 'Committing...'
  git commit -m "Version bump to ${latestRel}"
  echo 'Pushing...'
  git push || { echo "Failed to push version bump." ; exit 1;}
fi