CI: Move the nightly Serenity code coverage CI to GitHub actions

.github/workflows/nightly.yml

@@ -0,0 +1,24 @@
+name: Nightly CI
+
+on:
+  # Automatically run at the end of every day.
+  schedule:
+    - cron: '0 0 * * *'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || format('{0}-{1}', github.ref, github.run_number) }}
+  cancel-in-progress: true
+
+jobs:
+  CodeCoverage:
+    if: always() && github.repository == 'SerenityOS/serenity' && github.ref == 'refs/heads/master'
+
+    strategy:
+      fail-fast: false
+
+    uses: ./.github/workflows/serenity-template.yml
+    with:
+      toolchain: 'Clang'
+      os: ubuntu-22.04
+      arch: 'x86_64'
+      coverage: 'ON'

.github/workflows/serenity-template.yml

@@ -16,6 +16,10 @@ on:
           required: false
           type: string
           default: 'NORMAL_DEBUG'
+        coverage:
+          required: false
+          type: string
+          default: 'OFF'
 
 env:
   # runner.workspace = /home/runner/work/serenity
@@ -58,7 +62,7 @@ jobs:
           os: 'Serenity'
           arch: ${{ inputs.arch }}
           toolchain: ${{ inputs.toolchain }}
-          cache_key_extra: ${{ inputs.debug_options }}
+          cache_key_extra: ${{ inputs.debug_options }}-COVERAGE_${{ inputs.coverage }}
           serenity_ccache_path: ${{ env.SERENITY_CCACHE_DIR }}
           toolchain_ccache_path: ${{ env.TOOLCHAIN_CCACHE_DIR }}
           download_cache_path: ${{ github.workspace }}/Build/caches
@@ -117,6 +121,7 @@ jobs:
             -DCMAKE_CXX_COMPILER=g++-13 \
             -DENABLE_UNDEFINED_SANITIZER=ON \
             -DUNDEFINED_BEHAVIOR_IS_FATAL=ON \
+            -DENABLE_USERSPACE_COVERAGE_COLLECTION=${{ inputs.coverage }} \
             -DDUMP_REGIONS_ON_CRASH=ON \
             -DENABLE_PCI_IDS_DOWNLOAD=OFF \
             -DENABLE_USB_IDS_DOWNLOAD=OFF
@@ -181,3 +186,25 @@ jobs:
         if: ${{ !cancelled() && inputs.debug_options == 'NORMAL_DEBUG'}}
         working-directory: ${{ steps.build-parameters.outputs.build_directory }}
         run: '[ ! -e debug.log ] || cat debug.log'
+
+      # === COVERAGE ===
+
+      - name: Aggregate Coverage Results
+        if: ${{ inputs.coverage == 'ON' }}
+        working-directory: ${{ github.workspace }}
+        run: ./Meta/analyze-qemu-coverage.sh
+        env:
+          SERENITY_TOOLCHAIN: ${{ matrix.toolchain }}
+          SERENITY_ARCH: ${{ matrix.arch }}
+
+      # FIXME: Deploy the static html pages somewhere
+      # FIXME: Alter script to also (instead?) produce a raw coverage.txt file for ingestion into sonar cloud
+      # Note: tmp_profile_data/Coverage.profdata has the entire combined profile data, but creating the raw txt requires
+      #       all of the instrumented binaries and the profdata file.
+      - name: Upload Coverage Results
+        if: ${{ inputs.coverage == 'ON' }}
+        uses: actions/upload-artifact@v4
+        with:
+          name: serenity-coverage
+          path: ${{ steps.build-parameters.outputs.build_directory }}/reports
+          retention-days: 90

Meta/Azure/nightly-pipeline.yml

@@ -12,14 +12,6 @@ pr: none
 trigger: none
 
 stages:
-  - stage: SerenityOS_Coverage
-    dependsOn: []
-    jobs:
-      - template: Serenity.yml
-        parameters:
-          arch: 'x86_64'
-          coverage: 'ON'
-
   - stage: Lagom_Android
     dependsOn: []
     jobs: