workflow: Add workflow

Author: alexytomi

.github/workflows/build.yml

@@ -0,0 +1,112 @@
+name: Build ANGLE
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    types: [ opened, reopened ]
+  workflow_dispatch:
+
+jobs:
+  update-build-environment-cache:
+    permissions:
+      actions: write
+    runs-on: ubuntu-24.04
+    steps:
+      - name: Restore environment from cache
+        id: cached-environment-restore
+        uses: actions/cache/restore@v4
+        with:
+          path: ./
+          key: ios_and_android-build-environment
+      - name: Verify cached environment is valid
+        run: |
+          if [ ! -d "depot_tools" ] ; then
+          git clone https://chromium.googlesource.com/chromium/tools/depot_tools.git
+          fi
+          export PATH="$PWD/depot_tools:$PATH"
+          gclient config --spec 'solutions = [
+            {
+              "name": ".",
+              "url": "https://chromium.googlesource.com/angle/angle.git",
+              "deps_file": "DEPS",
+              "managed": False,
+              "custom_vars": {},
+            },
+          ]
+          target_os = ["ios", "android"]'
+          gclient sync -Rf --no-history --with_branch_heads
+# Stupid workaround, see https://github.com/azu/github-actions-overwrite-cache-example and https://github.com/actions/cache/issues/342
+      - name: Delete Previous Cache
+        run: |
+          gh cache delete "${{ steps.cached-environment-restore.outputs.cache-primary-key }}" --repo $GITHUB_REPOSITORY
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      - name: Save environment to cache
+        uses: actions/cache/save@v4
+        with:
+          path: ./
+          key: ios_and_android-build-environment
+
+  build:
+    needs: update-build-environment-cache
+    strategy:
+      matrix:
+        include:
+          - os: android
+            arch: arm64
+            runs-on: ubuntu-24.04
+          - os: android
+            arch: arm
+            runs-on: ubuntu-24.04
+          - os: android
+            arch: x86
+            runs-on: ubuntu-24.04
+          - os: android
+            arch: x64
+            runs-on: ubuntu-24.04
+          - os: ios
+            arch: arm64
+            runs-on: macos-15
+    runs-on: ${{ matrix.runs-on }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Restore environment from cache
+        id: cached-environment-restore
+        uses: actions/cache/restore@v4
+        with:
+          path: ./
+          key: ios_and_android-build-environment
+      - name: Fetch, verify, and setup build environment
+        run: |
+          export PATH="$PWD/depot_tools:$PATH"
+          echo "$PWD/depot_tools" >> $GITHUB_PATH
+          gclient config --spec 'solutions = [
+            {
+              "name": ".",
+              "url": "https://chromium.googlesource.com/angle/angle.git",
+              "deps_file": "DEPS",
+              "managed": False,
+              "custom_vars": {},
+            },
+          ]
+          target_os = ["${{ matrix.os }}"]'
+          gclient sync -Rf --no-history --with_branch_heads
+      - name: Build ANGLE
+        run: |
+          gn gen out/${{ matrix.os }}-${{ matrix.arch }}
+          autoninja -C out/${{ matrix.os }}-${{ matrix.arch }}
+      - name: Upload builds
+        uses: actions/upload-artifact@v4
+        with:
+          name: ANGLE-${{ matrix.os }}-${{ matrix.arch }}
+          path: out/${{ matrix.os }}-${{ matrix.arch }}
+      - name: Upload shared library
+        uses: actions/upload-artifact@v4
+        with:
+          name: ANGLE-${{ matrix.os }}-${{ matrix.arch }}.so
+          path: |
+            out/${{ matrix.os }}-${{ matrix.arch }}/lib*.so
+            !out/${{ matrix.os }}-${{ matrix.arch }}/*.so.TOC