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# Maintainer: Saren Arterius <saren@wtako.net>
# Maintainer: Térence Clastres <t.clastres@gmail.com>

# Maintainer: Jan Alexander Steffens (heftig) <jan.steffens@gmail.com>
# Maintainer: Ionut Biru <ibiru@archlinux.org>
# Contributor: Michael Kanis <mkanis_at_gmx_dot_de>


### MERGE REQUESTS SELECTION

# available MR: ('!429' '!493' '!575' '!579' !719 '!724' '!762')
# _merge_requests_to_use=('!493' '!575' '!579' !719 '!724' '!762')
_merge_requests_to_use=('!575' '!724' '!909')

### IMPORTANT: Do no edit below this line unless you know what you're doing

pkgname=mutter-performance
pkgver=3.34.1+52+g403d8fcc6
pkgrel=1
pkgdesc="A window manager for GNOME | Attempts to improve performances with non-upstreamed merge-requests and frequent stable branch resync"
url="https://gitlab.gnome.org/GNOME/mutter"
arch=(x86_64)
license=(GPL)
depends=(dconf gobject-introspection-runtime gsettings-desktop-schemas libcanberra
         startup-notification zenity libsm gnome-desktop upower libxkbcommon-x11
         gnome-settings-daemon libgudev libinput pipewire xorg-server-xwayland)
makedepends=(gobject-introspection git egl-wayland meson xorg-server "sysprof>=3.34")
checkdepends=(xorg-server-xvfb)
provides=(mutter mutter-781835-workaround)
conflicts=(mutter)
replaces=(mutter-781835-workaround)
groups=(gnome)
_commit=403d8fcc6624f5d027dd599c934411e71d248754  # gnome-3-34
source=("$pkgname::git+https://gitlab.gnome.org/GNOME/mutter.git#commit=$_commit"
        918.patch
        fix-build.patch)
sha256sums=('SKIP'
            '775fbcd209a170b6ca13326367ef62b8d35acff16019553c40eb24f0684c3495'
            '28aa24daed161f2566ca2b159beb43285184c533956b851a7eb318de741da935')

pkgver() {
  cd $pkgname
  git describe --tags | sed 's/-/+/g'
}

hash_of() {
  git log --oneline --all | grep "$1" | tail -n 1 | awk '{print $1}'
}

git_cp_by_msg() {
  # Comment: Saren found a way to fetch hash based on commit name. It's controversial but might be interesting to create a function to call for each MR to not have to update the hash at each rebase.
  h_first=$(hash_of "$2")
  if [[ -n "$3" ]]; then
    h_last=$(hash_of "$3")
    echo "Found $h_first^$h_last for $1"
    git cherry-pick -n -Xtheirs $h_first^..$h_last
  else
    echo "Found $h_first for $1"
    git cherry-pick -n -Xtheirs $h_first
  fi
}

pick_mr() {
  for mr in "${_merge_requests_to_use[@]}"; do
    if [ "$1" = "$mr" ]; then
      if [ "$3" = "merge" ]; then
        echo "Merging $1..."
        git cherry-pick -n $2
      elif [ "$3" = "revert" ]; then
        echo "Reverting $1..."
        git revert "$2" --no-commit
      else
        echo "Merging latest commits for $1..."
        git_cp_by_msg "$1" "$2" "$3"
      fi
      break
    fi
  done
}

prepare() {
  cd $pkgname

  ### Adding and fetching remotes providing the selected merge-requests
  git reset --hard
  git cherry-pick --abort || true
  git remote add vanvugt https://gitlab.gnome.org/vanvugt/mutter.git || true
  # git remote add verdre https://gitlab.gnome.org/verdre/mutter.git || true # !429
  git remote add 3v1no https://gitlab.gnome.org/3v1n0/mutter.git || true

  git fetch vanvugt
  # git fetch verdre
  git fetch 3v1no

  ### Merge Requests

  # Merge Request Prototype
  # Title:
  # URL:
  # Type:
  # Status:
  # Comment:
  # git cherry-pick -n first_commit^..last_commit
  #
  # Possible Status:
  #   1. Needs rebase: Conflicts with master branch.
  #   2. Needs review: Mutter maintainers needs to review the new/updated MR and provide feedback.
  #   3. Needs changes: MR needs to be adjusted based on maintainers feedback.
  #   4. Merged: MR approved and it changes commited to master.
  #
  # Generally, a MR status oscillate between 2 and 3 and then becomes 4.
  #
  # Possible Type:
  #   1. Improvement: Makes an already existing feature behave better, more efficiently/reliably.
  #   2. Feature: Adds a new functionality.
  #   3. Fix: Regression/bug fix only available in master (not backported).
  #   4. Cleanup: Code styling improvement, function deprecation, rearrangement...

  # Title: Resource scale computation optimizations
  # URL: https://gitlab.gnome.org/GNOME/mutter/merge_requests/493
  # Type: 1
  # Status: 3
  # Comment: Not picked by default because breaks the overview on Wayland. https://gitlab.gnome.org/GNOME/mutter/merge_requests/493#note_549833
  pick_mr '!493' 3aa449af^..1017ce44 'merge'

  # Title: Honour `CLUTTER_ACTOR_NO_LAYOUT` more efficiently
  # URL: https://gitlab.gnome.org/GNOME/mutter/merge_requests/575
  # Type: 1
  # Status: 2
  pick_mr '!575' 'clutter/stage: Add an API for shallow relayouts' 'clutter/actor: Use the new shallow relayout API'

  # Title: clutter/stage: Update input devices right after doing a relayout
  # URL: https://gitlab.gnome.org/GNOME/mutter/merge_requests/429
  # Type: 1
  # Status: 1
  pick_mr '!429' 'clutter/stage-cogl: Add method to check if ongoing repaint is clipped' 'clutter/stage: Use a device-manager method to update input devices'

  # Title: Sync timelines to hardware vsync
  # URL: https://gitlab.gnome.org/GNOME/mutter/merge_requests/724
  # Type: 1
  # Status: 2
  # Comment:
  pick_mr '!724' 'clutter/stage: Add API to get_next_presentation_time' 'clutter/master-clock-default: Sync timelines to hardware vsync'

  # Title: backends: Do not reload keymap on new keyboard notifications
  # URL:  https://gitlab.gnome.org/GNOME/mutter/merge_requests/579
  # Type: 1
  # Status: 4
  # Comment: Was reverted: https://gitlab.gnome.org/GNOME/mutter/merge_requests/833
  #          If you use stenography software or play hardcore rhythm games like Lunatic Rave 2/osumania, use it.
  pick_mr '!579' ce86f90efbaa51522ba14c5b4cad933c2106de42 'revert'

  # Title: https://gitlab.gnome.org/GNOME/mutter/merge_requests/719
  # URL: https://gitlab.gnome.org/GNOME/mutter/merge_requests/719
  # Type: 1
  # Status: 4
  # Comment: Was reverted: https://gitlab.gnome.org/GNOME/mutter/commit/97140ab6346bd29208e99c9c9aab892c2eec0e52
  #          Use together with !762 to fix one of its issues.
  pick_mr '!719' 97140ab6346bd29208e99c9c9aab892c2eec0e52 'revert'
  pick_mr '!762' e9ba9dc2 'merge'

  # https://gitlab.gnome.org/GNOME/mutter/merge_requests/918
  git apply -3 ../918.patch

  patch -Np1 < ../fix-build.patch

}

build() {
  arch-meson $pkgname build \
    -D egl_device=true \
    -D wayland_eglstream=true \
    -D installed_tests=false
  ninja -C build
}

check() (
  mkdir -p -m 700 "${XDG_RUNTIME_DIR:=$PWD/runtime-dir}"
  glib-compile-schemas "${GSETTINGS_SCHEMA_DIR:=$PWD/build/data}"
  export XDG_RUNTIME_DIR GSETTINGS_SCHEMA_DIR

  # Unexpected passes in conform test
  # Stacking test flaky
  dbus-run-session xvfb-run -s '+iglx -noreset' meson test -C build --print-errorlogs || :
)

package() {
  DESTDIR="$pkgdir" meson install -C build
}