.github: add CI pipeline

This pipeline builds the driver against the latest Xserver stable
release as well as current master.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>

.github/actions/build-driver/action.yaml

@@ -0,0 +1,69 @@
+name: 'build driver'
+description: 'build driver against specific Xserver'
+inputs:
+  xserver-version:
+    required: true
+
+runs:
+  using: "composite"
+  steps:
+    - name: check out driver repo
+      uses: actions/checkout@v4
+
+    - name: prepare build environment
+      shell: bash
+      run: |
+        MACHINE=`gcc -dumpmachine`
+        echo "MACHINE=$MACHINE" >> "$GITHUB_ENV"
+        echo "PKG_CONFIG_PATH=$X11_PREFIX/share/pkgconfig:$X11_PREFIX/lib/$MACHINE/pkgconfig:$X11_PREFIX/lib/pkgconfig:$PKG_CONFIG_PATH" >> "$GITHUB_ENV"
+        sudo chown root /bin/tar && sudo chmod u+s /bin/tar
+
+    - name: apt cache
+      uses: actions/cache@v4
+      with:
+        path: /var/cache/apt
+        key: apt-cache-${{ hashFiles('.github/scripts/ubuntu/install-pkg.sh') }}
+        restore-keys: apt-cache-
+
+    - name: pkg install
+      shell: bash
+      run:  sudo .github/scripts/ubuntu/install-pkg.sh
+
+    - name: X11 prereq cache
+      uses: actions/cache@v4
+      with:
+        path: |
+            ${{ env.X11_PREFIX }}
+        key: ${{ runner.name }}-x11-deps-${{ hashFiles('.github/scripts/install-prereq.sh') }}
+        restore-keys: ${{ runner.name }}-x11-deps-
+
+    - name: generic prereq
+      shell: bash
+      run:  .github/scripts/install-prereq.sh
+
+    - name: check out xserver repo
+      uses: actions/checkout@v4
+      with:
+        repository: X11Libre/xserver
+        path: xserver-sdk
+        ref: ${{ inputs.xserver-version }}
+
+    - name: build xserver sdk
+      shell: bash
+      env:
+        MESON_ARGS: -Dc_args="-fno-common" -Dprefix=/usr -Dnamespace=false -Dxselinux=false -Dxephyr=false -Dwerror=false -Dxcsecurity=false -Dxorg=true -Dxvfb=false -Dxnest=false -Ddocs=false
+      run:  |
+        cd xserver-sdk
+        echo -n > .meson_environment
+        echo "export MESON_BUILDDIR=$MESON_BUILDDIR" >> .meson_environment
+        echo "export PKG_CONFIG_PATH=$PKG_CONFIG_PATH" >> .meson_environment
+        .gitlab-ci/meson-build.sh --skip-test
+        sudo meson install --no-rebuild -C "$MESON_BUILDDIR"
+        sudo mkdir -p /usr/local/lib/$MACHINE/xorg/modules # /home/runner/x11/lib/xorg/modules
+        sudo chown -R runner /usr/local/lib/$MACHINE/xorg/modules # /home/runner/x11/lib/xorg/modules
+
+    - name: compile driver
+      shell: bash
+      run: |
+        CFLAGS="-Wall" ./autogen.sh # --prefix=$X11_PREFIX
+        CFLAGS="-Wall" make -j # install

.github/scripts/conf.sh

@@ -0,0 +1,13 @@
+export X11_OS=`uname -s`
+
+export X11_PREFIX="${X11_PREFIX:-$HOME/x11}"
+export X11_BUILD_DIR="${X11_BUILD_DIR:-$HOME/build-deps}"
+export DRV_BUILD_DIR="${DRV_BUILD_DIR:-$HOME/build-drivers}"
+
+case "$X11_OS" in
+Darwin) export FDO_CI_CONCURRENT=`sysctl -n hw.logicalcpu` ;;
+Linux) export FDO_CI_CONCURRENT=`nproc` ;;
+esac
+
+export PATH="$X11_PREFIX/bin:$PATH"
+export PKG_CONFIG_PATH="$X11_PREFIX/lib/x86_64-linux-gnu/pkgconfig:$X11_PREFIX/lib/pkgconfig:$X11_PREFIX/share/pkgconfig:$PKG_CONFIG_PATH"

.github/scripts/github/make-release

@@ -0,0 +1,17 @@
+#!/bin/bash
+
+err() {
+    echo "$0: $*"
+}
+
+[ "$GITHUB_REPOSITORY" ] || err "missing variable GITHUB_REPOSITORY"
+
+TITLE=$(git tag -l --format='%(contents)' $tag)
+
+echo "tag=$tag"
+echo "title=$TITLE"
+
+gh release create "$tag" \
+        --repo="$GITHUB_REPOSITORY" \
+        --title="$tag" \
+        --generate-notes

.github/scripts/install-prereq.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+
+set -e
+
+. .github/scripts/util.sh
+
+mkdir -p $X11_BUILD_DIR
+cd $X11_BUILD_DIR
+
+if [ "$X11_OS" = "Linux" ]; then
+build_meson   drm               https://gitlab.freedesktop.org/mesa/drm                  libdrm-2.4.121   "" \
+    -Domap=enabled
+fi
+build_meson   libxcvt           https://gitlab.freedesktop.org/xorg/lib/libxcvt          libxcvt-0.1.0
+build_ac      xorgproto         https://gitlab.freedesktop.org/xorg/proto/xorgproto      xorgproto-2024.1

.github/scripts/ubuntu/install-pkg.sh

@@ -0,0 +1,94 @@
+#!/bin/bash
+
+set -e
+
+# Packages which are needed by this script, but not for the xserver build
+EPHEMERAL="
+	libexpat-dev
+	libgles2-mesa-dev
+	libxkbcommon-dev
+	x11-utils
+	x11-xserver-utils
+	xauth
+	xvfb
+"
+
+apt-get update
+
+apt-get install -y \
+	$EPHEMERAL \
+	autoconf \
+	automake \
+	build-essential \
+	ca-certificates \
+	libaudit-dev \
+	libbsd-dev \
+	libcairo2-dev \
+	libdbus-1-dev \
+	libdrm-dev \
+	libegl1-mesa-dev \
+	libepoxy-dev \
+	libevdev2 \
+	libexpat1 \
+	libffi-dev \
+	libgbm-dev \
+	libgcrypt-dev \
+	libgl1-mesa-dev \
+	libgles2 \
+	libglx-mesa0 \
+	libinput10 \
+	libinput-dev \
+	libnvidia-egl-wayland-dev \
+	libpciaccess-dev \
+	libpixman-1-dev \
+	libspice-protocol-dev \
+	libsystemd-dev \
+	libudev-dev \
+	libunwind-dev \
+	libx11-dev \
+	libx11-xcb-dev \
+	libxau-dev \
+	libxaw7-dev \
+	libxcb-glx0-dev \
+	libxcb-icccm4-dev \
+	libxcb-image0-dev \
+	libxcb-keysyms1-dev \
+	libxcb-randr0-dev \
+	libxcb-render-util0-dev \
+	libxcb-render0-dev \
+	libxcb-shape0-dev \
+	libxcb-shm0-dev \
+	libxcb-util0-dev \
+	libxcb-xf86dri0-dev \
+	libxcb-xkb-dev \
+	libxcb-xv0-dev \
+	libxcb1-dev \
+	libxdmcp-dev \
+	libxext-dev \
+	libxfixes-dev \
+	libxfont-dev \
+	libxi-dev \
+	libxinerama-dev \
+	libxkbcommon0 \
+	libxkbfile-dev \
+	libxmu-dev \
+	libxmuu-dev \
+	libxpm-dev \
+	libxrender-dev \
+	libxres-dev \
+	libxshmfence-dev \
+	libxt-dev \
+	libxtst-dev \
+	libxv-dev \
+	mesa-common-dev \
+	meson \
+	nettle-dev \
+	libpango1.0-dev \
+	pkg-config \
+	x11-xkb-utils \
+	xfonts-utils \
+	xkb-data \
+	xtrans-dev \
+	xutils-dev \
+	libxaw7-dev \
+	python3-mako

.github/scripts/util.sh

@@ -0,0 +1,85 @@
+
+. .github/scripts/conf.sh
+
+clone_source() {
+    local pkgname="$1"
+    local url="$2"
+    local ref="$3"
+    local commit="$4"
+
+    if [ ! -f $pkgname/.git/config ]; then
+        echo "need to clone $pkgname"
+        if [ "$commit" ]; then
+            git clone $url $pkgname --branch=$ref
+        else
+            git clone $url $pkgname --branch=$ref --depth 1
+        fi
+    else
+        echo "already cloned $pkgname"
+    fi
+
+    if [ "$commit" ]; then
+        ( cd $pkgname && git checkout -f "$commit" )
+    fi
+}
+
+build_meson() {
+    local pkgname="$1"
+    local url="$2"
+    local ref="$3"
+    local commit="$4"
+    shift
+    shift
+    shift
+    shift || true
+    if [ -f $X11_PREFIX/$pkgname.DONE ]; then
+        echo "package $pkgname already built"
+    else
+        clone_source "$pkgname" "$url" "$ref" "$commit"
+        (
+            cd $pkgname
+            meson "$@" build -Dprefix=$X11_PREFIX
+            ninja -j${FDO_CI_CONCURRENT:-4} -C build install
+        )
+        touch $X11_PREFIX/$pkgname.DONE
+    fi
+}
+
+build_ac() {
+    local pkgname="$1"
+    local url="$2"
+    local ref="$3"
+    local commit="$4"
+    shift
+    shift
+    shift
+    shift || true
+    if [ -f $X11_PREFIX/$pkgname.DONE ]; then
+        echo "package $pkgname already built"
+    else
+        clone_source "$pkgname" "$url" "$ref" "$commit"
+        (
+            cd $pkgname
+            ./autogen.sh --prefix=$X11_PREFIX
+            make -j${FDO_CI_CONCURRENT:-4} install
+        )
+        touch $X11_PREFIX/$pkgname.DONE
+    fi
+}
+
+build_drv_ac() {
+    local pkgname="$1"
+    local url="$2"
+    local ref="$3"
+    local commit="$4"
+    shift
+    shift
+    shift
+    shift || true
+    clone_source "$pkgname" "$url" "$ref" "$commit"
+    (
+        cd $pkgname
+        ./autogen.sh # --prefix=$X11_PREFIX
+        make -j${FDO_CI_CONCURRENT:-4} # install
+    )
+}

.github/workflows/build.yml

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+name: Build driver
+
+permissions:
+    contents: write
+
+env:
+    MESON_BUILDDIR:  "build"
+    X11_PREFIX:      /home/runner/x11
+    X11_BUILD_DIR:   /home/runner/build-deps
+
+on:
+    push:
+    pull_request:
+
+jobs:
+    for-xserver-stable-25_0:
+        runs-on: ubuntu-latest
+        steps:
+            - uses: actions/checkout@v4
+            - uses: ./.github/actions/build-driver
+              with:
+                  xserver-version: xlibre-xserver-25.0.0.5
+
+    for-xserver-master:
+        runs-on: ubuntu-latest
+        steps:
+            - uses: actions/checkout@v4
+            - uses: ./.github/actions/build-driver
+              with:
+                  xserver-version: master
+
+    release:
+        name: Release pushed tag
+        runs-on: ubuntu-latest
+        if: ${{ startsWith(github.ref, 'refs/tags/xlibre-') }}
+        steps:
+            - name: Checkout
+              uses: actions/checkout@v4
+            - name: Create release
+              env:
+                  GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+                  tag: ${{ github.ref_name }}
+              run: .github/scripts/github/make-release