# Build the compositor on the three distributions HyprCosmic targets.
#
# WHY THIS IS A SECOND FILE
# -------------------------
# ci.yml beside it is upstream's, and it stays untouched. It asks a different
# question -- rustfmt, clippy, and whether the feature flags still compile -- on
# a single Ubuntu runner, and none of that stops being worth asking because the
# repository was forked. Replacing it would also mean carrying a conflict into
# every rebase against pop-os/cosmic-comp, for no gain. This file is additive,
# which is the same rule the rest of the fork follows.
#
# WHY CONTAINERS RATHER THAN ONE RUNNER
# -------------------------------------
# The interesting failure is never "does Rust compile this" -- it is "does this
# distribution have a package called libseat-dev". That question cannot be asked
# from a single Ubuntu runner, so each distribution builds in its own image with
# its own package manager and its own names. A job failing here means a real
# user of that distribution could not have built it either.
#
# WHY RUSTUP AND NOT THE DISTRIBUTION'S RUST
# ------------------------------------------
# Cargo.toml asks for edition 2024 and rust-version 1.93, and rust-toolchain.toml
# pins channel 1.93 with rust-src. Debian bookworm ships rustc 1.63, so on one of
# the three targets the packaged toolchain cannot build this at all. rustup is
# what makes the three jobs comparable -- and because it reads
# rust-toolchain.toml, all three get the pinned compiler rather than whatever
# each distribution happened to freeze.
name: HyprCosmic

on:
  push:
    branches: [master]
  pull_request:
  workflow_dispatch:

# A full matrix here is tens of minutes per distribution. Superseding a run that
# is already obsolete costs nothing and keeps a queue from forming behind it.
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

env:
  CARGO_TERM_COLOR: always
  RUST_BACKTRACE: 1

jobs:
  build:
    name: ${{ matrix.distro }}
    runs-on: ubuntu-latest
    container: ${{ matrix.image }}
    strategy:
      # One distribution failing on a package name is worth seeing on its own.
      # Cancelling its siblings would hide whether the break is universal or
      # local to that distribution's naming, which is the whole point of the
      # matrix.
      fail-fast: false
      matrix:
        include:
          - distro: fedora
            image: fedora:latest
          - distro: debian
            image: debian:bookworm
          - distro: arch
            image: archlinux:latest

    steps:
      # Before checkout, deliberately: actions/checkout needs git in the image,
      # and these containers are bare.
      #
      # The library list is upstream's own, from debian/control, translated per
      # distribution rather than trimmed. Four of them -- wayland, EGL,
      # fontconfig and xcb -- proved unnecessary to build on a Fedora workstation
      # with none of them installed, but that is a fact about one machine's
      # feature flags, not a licence to drop what upstream says it needs.
      - name: Install build dependencies (fedora)
        if: matrix.distro == 'fedora'
        run: |
          dnf -y install --setopt=install_weak_deps=False \
            git curl gcc gcc-c++ cmake pkgconf-pkg-config \
            wayland-devel libxkbcommon-devel libinput-devel libseat-devel \
            systemd-devel mesa-libgbm-devel mesa-libEGL-devel pixman-devel \
            libdisplay-info-devel fontconfig-devel libxcb-devel

      - name: Install build dependencies (debian)
        if: matrix.distro == 'debian'
        run: |
          apt-get update
          DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
            git curl ca-certificates build-essential cmake pkg-config \
            libwayland-dev libxkbcommon-dev libinput-dev libseat-dev \
            libsystemd-dev libudev-dev libgbm-dev libegl1-mesa-dev \
            libpixman-1-dev libdisplay-info-dev libfontconfig-dev libxcb1-dev

      # Arch keeps headers in the main packages rather than split -devel ones,
      # so this list is shorter by construction, not by omission.
      - name: Install build dependencies (arch)
        if: matrix.distro == 'arch'
        run: |
          pacman -Syu --noconfirm --needed \
            git curl base-devel cmake pkgconf \
            wayland libxkbcommon libinput seatd systemd-libs mesa pixman \
            libdisplay-info fontconfig libxcb

      - uses: actions/checkout@v4

      # --default-toolchain none, then let rust-toolchain.toml choose. Naming a
      # version here would create a second place to update and a silent way for
      # CI to test a compiler the project does not use.
      - name: Install Rust
        run: |
          curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs \
            | sh -s -- -y --default-toolchain none --profile minimal
          echo "$HOME/.cargo/bin" >> "$GITHUB_PATH"

      - name: Show toolchain
        run: |
          rustup show
          cargo --version

      - uses: Swatinem/rust-cache@v2
        with:
          key: ${{ matrix.distro }}

      - name: Build
        run: cargo build --release --locked

      - name: Test
        run: cargo test --release --locked

      # Staged into DESTDIR so the assertions below can inspect the result
      # without needing root or a live system.
      - name: Install into a staging root
        run: make install DESTDIR="$PWD/stage" prefix=/usr

      # HyprCosmic replaces COSMIC rather than sitting beside it, so this build
      # is *the* cosmic-comp on a machine that installs it and has to place
      # everything upstream's does. The compositor starts without the two .ron
      # defaults and then has no shortcuts and no tiling exceptions, which is a
      # failure that looks like "the keyboard does nothing" rather than like a
      # missing file -- worth an assertion rather than a bug report.
      #
      # The negative assertion is the one that would rot quietly: nothing may go
      # back to the private libexec directory this fork used to install into,
      # because a stray copy there is a second compositor that nothing runs and
      # that no `uninstall` removes.
      - name: Assert it installs as the compositor, at upstream's paths
        run: |
          set -eux
          test -x stage/usr/bin/cosmic-comp
          test -f stage/usr/share/cosmic/com.system76.CosmicSettings.Shortcuts/v1/defaults
          test -f stage/usr/share/cosmic/com.system76.CosmicSettings.WindowRules/v1/tiling_exception_defaults
          test ! -e stage/usr/libexec/hyprcosmic/cosmic-comp
          find stage -type f -printf '%M %10s %P\n'

      - uses: actions/upload-artifact@v4
        with:
          name: cosmic-comp-${{ matrix.distro }}
          path: stage/
          retention-days: 14