ci: Add chromium build

closes #80

.github/workflows/ci.yml

@@ -76,4 +76,17 @@ jobs:
     steps:
     - uses: actions/checkout@v3
     - name: REUSE Compliance Check
-      uses: fsfe/reuse-action@v1
+      uses: fsfe/reuse-action@v1
+
+  # Test to ensure we don't accidentally break the Chromium build.
+  chromium:
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
+        with:
+          python-version: '3.10'
+      - name: Install WSI dependencies
+        run: sudo apt-get -qq update && sudo apt-get install -y libwayland-dev xorg-dev
+      - name: Test chromium build
+        run: python scripts/gn/gn.py

.gitignore

@@ -9,4 +9,17 @@ __pycache__
 build
 .vscode/
 **/.*.swp
-external
+external
+
+# Chromium build artifacts
+.cipd/
+.gn
+.gclient
+.gclient_entries
+.gclient_previous_sync_commits
+out/
+third_party/
+buildtools/
+depot_tools/
+testing/
+tools/

scripts/gn/DEPS

@@ -0,0 +1,70 @@
+# Copyright 2023 The Khronos Group Inc.
+# Copyright 2023 Valve Corporation
+# Copyright 2023 LunarG, Inc.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+# This file is subset of DEPS file from https://chromium.googlesource.com/angle/angle
+
+gclient_gn_args_file = 'build/config/gclient_args.gni'
+
+vars = {
+  'chromium_git': 'https://chromium.googlesource.com',
+  'ninja_version': 'version:2@1.11.1.chromium.6',
+}
+
+deps = {
+
+  'build': {
+    'url': '{chromium_git}/chromium/src/build.git@1015724d82945f9ef7e51c6f804034ccf5f79951',
+  },
+
+  'buildtools': {
+    'url': '{chromium_git}/chromium/src/buildtools.git@3c7e3f1b8b1e4c0b6ec693430379cea682de78d6',
+  },
+
+  'buildtools/linux64': {
+    'packages': [
+      {
+        'package': 'gn/gn/linux-${{arch}}',
+        'version': 'git_revision:5e19d2fb166fbd4f6f32147fbb2f497091a54ad8',
+      }
+    ],
+    'dep_type': 'cipd',
+    'condition': 'host_os == "linux"',
+  },
+
+  'testing': {
+    'url': '{chromium_git}/chromium/src/testing@949b2864b6bd27656753b917c9aa7731dc7a06f6',
+  },
+
+  'tools/clang': {
+    'url': '{chromium_git}/chromium/src/tools/clang.git@566877f1ff1a5fa6beaca3ab4b47bd0b92eb614f',
+  },
+
+  'third_party/ninja': {
+    'packages': [
+      {
+        'package': 'infra/3pp/tools/ninja/${{platform}}',
+        'version': Var('ninja_version'),
+      }
+    ],
+    'dep_type': 'cipd',
+  },
+
+}
+
+hooks = [
+  {
+    'name': 'sysroot_x64',
+    'pattern': '.',
+    'condition': 'checkout_linux and checkout_x64',
+    'action': ['python3', 'build/linux/sysroot_scripts/install-sysroot.py',
+               '--arch=x64'],
+  },
+  {
+    'name': 'clang',
+    'pattern': '.',
+    'action': ['python3', 'tools/clang/scripts/update.py'],
+  },
+]

scripts/gn/gn.py

@@ -0,0 +1,56 @@
+#!/usr/bin/env python3
+# Copyright 2023 The Khronos Group Inc.
+# Copyright 2023 Valve Corporation
+# Copyright 2023 LunarG, Inc.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+import os
+import subprocess
+import sys
+
+# helper to define paths relative to the repo root
+def RepoRelative(path):
+    return os.path.abspath(os.path.join(os.path.dirname(__file__), '../../', path))
+
+def BuildGn():
+    if not os.path.exists(RepoRelative("depot_tools")):
+        print("Cloning Chromium depot_tools\n", flush=True)
+        clone_cmd = 'git clone https://chromium.googlesource.com/chromium/tools/depot_tools.git depot_tools'.split(" ")
+        subprocess.call(clone_cmd)
+
+    os.environ['PATH'] = os.environ.get('PATH') + ":" + RepoRelative("depot_tools")
+
+    print("Updating Repo Dependencies and GN Toolchain\n", flush=True)
+    update_cmd = './scripts/gn/update_deps.sh'
+    subprocess.call(update_cmd)
+
+    print("Checking Header Dependencies\n", flush=True)
+    gn_check_cmd = 'gn gen --check out/Debug'.split(" ")
+    subprocess.call(gn_check_cmd)
+
+    print("Generating Ninja Files\n", flush=True)
+    gn_gen_cmd = 'gn gen out/Debug'.split(" ")
+    subprocess.call(gn_gen_cmd)
+
+    print("Running Ninja Build\n", flush=True)
+    ninja_build_cmd = 'ninja -C out/Debug'.split(" ")
+    subprocess.call(ninja_build_cmd)
+
+#
+# Module Entrypoint
+def main():
+    try:
+        BuildGn()
+
+    except subprocess.CalledProcessError as proc_error:
+        print('Command "%s" failed with return code %s' % (' '.join(proc_error.cmd), proc_error.returncode))
+        sys.exit(proc_error.returncode)
+    except Exception as unknown_error:
+        print('An unkown error occured: %s', unknown_error)
+        sys.exit(1)
+
+    sys.exit(0)
+
+if __name__ == '__main__':
+    main()

scripts/gn/secondary/build_overrides/build.gni

@@ -0,0 +1,10 @@
+# Copyright 2023 The Khronos Group Inc.
+# Copyright 2023 Valve Corporation
+# Copyright 2023 LunarG, Inc.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+build_with_chromium = false
+ignore_elf32_limitations = true
+linux_use_bundled_binutils_override = false
+use_system_xcode = true

scripts/gn/secondary/build_overrides/vulkan_headers.gni

@@ -0,0 +1,7 @@
+# Copyright 2023 The Khronos Group Inc.
+# Copyright 2023 Valve Corporation
+# Copyright 2023 LunarG, Inc.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+vulkan_use_x11 = true

scripts/gn/secondary/build_overrides/vulkan_utility_libraries.gni

@@ -0,0 +1,7 @@
+# Copyright 2023 The Khronos Group Inc.
+# Copyright 2023 Valve Corporation
+# Copyright 2023 LunarG, Inc.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+vulkan_headers_dir = "//external/Vulkan-Headers"

scripts/gn/update_deps.sh

@@ -0,0 +1,39 @@
+#!/bin/sh
+
+# Copyright 2023 The Khronos Group Inc.
+# Copyright 2023 Valve Corporation
+# Copyright 2023 LunarG, Inc.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+# Execute at repo root
+cd "$(dirname $0)/../../"
+
+# Use update_deps.py to update source dependencies from /scripts/known_good.json
+scripts/update_deps.py --dir="external" --no-build
+
+cat << EOF > .gn
+buildconfig = "//build/config/BUILDCONFIG.gn"
+secondary_source = "//scripts/gn/secondary/"
+
+default_args = {
+    clang_use_chrome_plugins = false
+    use_custom_libcxx = false
+}
+EOF
+
+# Use gclient to update toolchain dependencies from /scripts/gn/DEPS (from chromium)
+cat << EOF > .gclient
+solutions = [
+  { "name"        : ".",
+    "url"         : "https://github.com/KhronosGroup/Vulkan-Utility-Libraries",
+    "deps_file"   : "scripts/gn/DEPS",
+    "managed"     : False,
+    "custom_deps" : {
+    },
+    "custom_vars": {},
+  },
+]
+EOF
+gclient sync
+