#!/bin/sh

set -e

retrieve() {
  mkdir -p tmp

  printf "Downloading '%s'...\n" "${archive_pkg}"
  if [ ! -f "tmp/${archive_pkg}" ]; then
    curl -o "tmp/${archive_pkg}" "http://www.slackware.com/~alien/slackbuilds/chromium-ungoogled/pkg64/current/${archive_pkg}"
  fi
  if [ ! -f "checksums/${archive_pkg}.md5" ]; then
    curl -o "checksums/${archive_pkg}.md5" "http://www.slackware.com/~alien/slackbuilds/chromium-ungoogled/pkg64/current/${archive_pkg}.md5"
  fi

  printf "Checking the integrity of '%s'...\n" "${archive_pkg}"
  cd tmp
  md5sum -c "../checksums/${archive_pkg}.md5"
  cd ..

  printf "Retrieving necessary metadata...\n"
  if [ ! -f "tmp/copyright" ]; then
    curl -o "tmp/copyright" "https://salsa.debian.org/chromium-team/chromium/-/raw/master/debian/copyright"
  fi
}

prepare() {

  if ! cmp --silent "debian/copyright" "tmp/copyright"; then
    cp "tmp/copyright" "debian/copyright"
  fi

  mkdir tmp/archive && cd tmp/archive

  tar -xf "../${archive_pkg}" 2>/dev/null

  # Move a couple of things in order to conform to Debian's standards
  mv usr/lib64 usr/lib
  mv usr/man usr/share/

  # Remove Slackware-specific folders
  rm -rf install/
  rm -rf usr/doc/

  # Correct to the new path
  sed -i "s|/usr/lib64/|/usr/lib/|" usr/bin/chromium-ungoogled

  # It should not be executable
  chmod 644 usr/lib/chromium-ungoogled/vk_swiftshader_icd.json

  cd ../..
}

package() {
  mkdir tree

  # Copy the content to the rootdir, ready to be packaged
  cp -r tmp/archive/etc "${pkgdir}/etc"
  cp -r tmp/archive/usr "${pkgdir}/usr"

  # Update the changelog
  dch \
    --newversion "${pkgver}" \
    --distribution unstable \
    --controlmaint "New release."

}

pkgver=101.0.4951.64
archive_pkg="chromium-ungoogled-${pkgver}-x86_64-1alien.txz"
pkgdir="tree"

retrieve
printf "Preparing...\n"
prepare
printf "Packaging...\n"
package

dpkg-buildpackage