#!/usr/bin/env bash

set -eu

function prerun() {
  echo "::group::Install build dependencies"
  # remove snap things, update+upgrade will be faster then
  for x in lxd core20 snapd; do sudo snap remove $x; done
  sudo apt-get purge snapd google-chrome-stable firefox
  # https://github.com/orgs/community/discussions/47863
  sudo apt-get remove grub-efi-amd64-bin grub-efi-amd64-signed shim-signed --allow-remove-essential
  sudo apt-get update
  sudo apt upgrade
  sudo xargs --arg-file=.github/workflows/build-dependencies.txt apt-get install -qq
  sudo apt-get clean
  sudo dmesg -c > /var/tmp/dmesg-prerun
  echo "::endgroup::"
}

function mod_build() {
  echo "::group::Generate debian packages"
  ./autogen.sh
  ./configure --enable-debug --enable-debuginfo --enable-asan --enable-ubsan
  make --no-print-directory --silent native-deb-utils native-deb-kmod
  mv ../*.deb .
  rm ./openzfs-zfs-dracut*.deb ./openzfs-zfs-dkms*.deb
  echo "$ImageOS-$ImageVersion" > tests/ImageOS.txt
  echo "::endgroup::"
}

function mod_install() {
  # install the pre-built module only on the same runner image
  MOD=`cat tests/ImageOS.txt`
  if [ "$MOD" != "$ImageOS-$ImageVersion" ]; then
    rm -f *.deb
    mod_build
  fi

  echo "::group::Install and load modules"
  # don't use kernel-shipped zfs modules
  sudo sed -i.bak 's/updates/extra updates/' /etc/depmod.d/ubuntu.conf
  sudo apt-get install --fix-missing ./*.deb

  # Native Debian packages enable and start the services
  # Stop zfs-zed daemon, as it may interfere with some ZTS test cases
  sudo systemctl stop zfs-zed
  sudo depmod -a
  sudo modprobe zfs
  sudo dmesg
  sudo dmesg -c > /var/tmp/dmesg-module-load
  echo "::endgroup::"

  echo "::group::Report CPU information"
  lscpu
  cat /proc/spl/kstat/zfs/chksum_bench
  echo "::endgroup::"

  echo "::group::Optimize storage for ZFS testings"
  # remove swap and umount fast storage
  # 89GiB -> rootfs + bootfs with ~80MB/s -> don't care
  # 64GiB -> /mnt with 420MB/s -> new testing ssd
  sudo swapoff -a

  # this one is fast and mounted @ /mnt
  # -> we reformat with ext4 + move it to /var/tmp
  DEV="/dev/disk/azure/resource-part1"
  sudo umount /mnt
  sudo mkfs.ext4 -O ^has_journal -F $DEV
  sudo mount -o noatime,barrier=0 $DEV /var/tmp
  sudo chmod 1777 /var/tmp

  # disk usage afterwards
  sudo df -h /
  sudo df -h /var/tmp
  sudo fstrim -a
  echo "::endgroup::"
}

case "$1" in
  build)
    prerun
    mod_build
    ;;
  tests)
    prerun
    mod_install
    ;;
esac