From eaf62f3969f62b6ef4363b4534b35823b6da81f1 Mon Sep 17 00:00:00 2001
From: Patric Stout <truebrain@openttd.org>
Date: Mon, 11 Mar 2024 15:42:44 +0100
Subject: [PATCH] Codechange: [CI] manual build CodeQL to improve speed
 (#12251)

Autobuild also fetches dependencies and other things, while those
are already ready on the system. This seems to cost ~1 minutes,
for no actual good reason.
---
 .github/workflows/codeql.yml | 42 ++++++++++++++++++++++++++++++++----
 1 file changed, 38 insertions(+), 4 deletions(-)

diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index c5a432d80b..fe63c43d9f 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -26,6 +26,19 @@ jobs:
     - name: Checkout
       uses: actions/checkout@v4
 
+    - name: Setup vcpkg caching
+      uses: actions/github-script@v7
+      with:
+        script: |
+          core.exportVariable('ACTIONS_CACHE_URL', process.env.ACTIONS_CACHE_URL || '');
+          core.exportVariable('ACTIONS_RUNTIME_TOKEN', process.env.ACTIONS_RUNTIME_TOKEN || '');
+          core.exportVariable('VCPKG_BINARY_SOURCES', 'clear;x-gha,readwrite')
+
+    - name: Install vcpkg
+      run: |
+        git clone https://github.com/microsoft/vcpkg
+        ./vcpkg/bootstrap-vcpkg.sh -disableMetrics
+
     - name: Install dependencies
       run: |
         echo "::group::Update apt"
@@ -44,13 +57,28 @@ jobs:
           libsdl2-dev \
           zlib1g-dev \
           # EOF
+
+        echo "::group::Install vcpkg dependencies"
+
+        # Disable vcpkg integration, as we mostly use system libraries.
+        mv vcpkg.json vcpkg-disabled.json
+
+        # We only use breakpad from vcpkg, as its CMake files
+        # are a bit special. So the Ubuntu's variant doesn't work.
+        ./vcpkg/vcpkg install breakpad
+
         echo "::endgroup::"
       env:
         DEBIAN_FRONTEND: noninteractive
 
-    - name: Set number of make jobs
+    - name: Prepare build
       run: |
-        echo "MAKEFLAGS=-j$(nproc)" >> $GITHUB_ENV
+        mkdir build
+        cd build
+
+        echo "::group::CMake"
+        cmake .. -DCMAKE_TOOLCHAIN_FILE=${GITHUB_WORKSPACE}/vcpkg/scripts/buildsystems/vcpkg.cmake
+        echo "::endgroup::"
 
     - name: Initialize CodeQL
       uses: github/codeql-action/init@v3
@@ -58,8 +86,14 @@ jobs:
         languages: cpp
         config-file: ./.github/codeql/codeql-config.yml
 
-    - name: Autobuild
-      uses: github/codeql-action/autobuild@v3
+    - name: Build
+      run: |
+        cd build
+
+        echo "::group::Build"
+        echo "Running on $(nproc) cores"
+        cmake --build . -j $(nproc)
+        echo "::endgroup::"
 
     - name: Perform CodeQL Analysis
       uses: github/codeql-action/analyze@v3