feat(CI): skip matrix builds for non-C++ changes (#9008)

.github/labeler.yml

@@ -1,3 +1,7 @@
+file-cpp:
+  - ./*.cpp
+  - ./*.h
+
 DB:
   - data/**/*.sql
 

.github/workflows/core_build.yml

@@ -1,4 +1,4 @@
-name: core-build
+name: main
 on:
   push:
     branches:
@@ -17,20 +17,6 @@ jobs:
         # the result of the matrix will be the combination of all attributes, so we get os*compiler builds
         os: [ubuntu-20.04]
         compiler: [clang]
-        # we can include specific combinations here
-        include:
-          - os: ubuntu-20.04
-            compiler: clang12
-          - os: ubuntu-20.04
-            compiler: clang11
-          - os: ubuntu-18.04
-            compiler: clang10
-          - os: ubuntu-18.04
-            compiler: gcc8
-          - os: ubuntu-20.04
-            compiler: gcc # default in 20.04 is gcc 9
-          - os: ubuntu-20.04
-            compiler: gcc10
     runs-on: ${{ matrix.os }}
     name: ${{ matrix.os }}-${{ matrix.compiler }}
     env:

.github/workflows/core_matrix_build.yml

@@ -0,0 +1,62 @@
+name: core
+on:
+  push:
+    branches:
+      - 'master'
+  pull_request:
+    types: ['labeled']
+
+concurrency:
+  group: ${{ github.head_ref }} || concat(${{ github.ref }}, ${{ github.workflow }})
+  cancel-in-progress: true
+
+jobs:
+  build:
+    strategy:
+      fail-fast: false
+      matrix:
+        # the result of the matrix will be the combination of all attributes, so we get os*compiler builds
+        include:
+          - os: ubuntu-20.04
+            compiler: clang12
+          - os: ubuntu-20.04
+            compiler: clang11
+          - os: ubuntu-18.04
+            compiler: clang10
+          - os: ubuntu-18.04
+            compiler: gcc8
+          - os: ubuntu-20.04
+            compiler: gcc # default in 20.04 is gcc 9
+          - os: ubuntu-20.04
+            compiler: gcc10
+    runs-on: ${{ matrix.os }}
+    name: ${{ matrix.os }}-${{ matrix.compiler }}
+    env:
+      COMPILER: ${{ matrix.compiler }}
+    if: github.repository == 'azerothcore/azerothcore-wotlk' && (github.event.label.name == 'run-build' || github.event.label.name == 'file-cpp' || github.ref == 'refs/heads/master')
+    steps:
+      - uses: actions/checkout@v2
+      - name: Cache
+        uses: actions/cache@v2
+        with:
+          path: var/ccache
+          key: ccache:${{ matrix.os }}:${{ matrix.compiler }}:${{ github.ref }}:${{ github.sha }}
+          restore-keys: |
+            ccache:${{ matrix.os }}:${{ matrix.compiler }}:${{ github.ref }}
+            ccache:${{ matrix.os }}:${{ matrix.compiler }}
+      - name: Configure OS
+        run: source ./acore.sh install-deps
+        env:
+          CONTINUOUS_INTEGRATION: true
+      - name: Create conf/config.sh
+        run: source ./apps/ci/ci-conf.sh
+      - name: Import db
+        run: source ./apps/ci/ci-import-db.sh
+      - name: Build
+        run: source ./apps/ci/ci-compile.sh
+      - name: Dry run
+        run: source ./apps/ci/ci-worldserver-dry-run.sh
+      - name: Check startup errors
+        run: source ./apps/ci/ci-error-check.sh
+      - name: Run unit tests
+        run: source ./apps/ci/ci-run-unit-tests.sh

.github/workflows/core_modules_build.yml

@@ -22,7 +22,7 @@ jobs:
     name: ${{ matrix.os }}-${{ matrix.compiler }}-${{ matrix.modules }}-modules
     env:
       COMPILER: ${{ matrix.compiler }}
-    if: github.repository == 'azerothcore/azerothcore-wotlk'
+    if: github.repository == 'azerothcore/azerothcore-wotlk' && (github.event.label.name == 'file-cpp' || github.event.label.name == 'run-build' || github.ref == 'refs/heads/master')
     steps:
       - uses: actions/checkout@v2
       - name: Checkout modules

.github/workflows/cpp20.yml

@@ -16,7 +16,7 @@ jobs:
     env:
       COMPILER: clang
       ENABLE_CPP_20: 1
-    if: github.repository == 'azerothcore/azerothcore-wotlk'
+    if: github.repository == 'azerothcore/azerothcore-wotlk' && (github.event.label.name == 'file-cpp' || github.event.label.name == 'run-build' || github.ref == 'refs/heads/master')
     steps:
       - uses: actions/checkout@v2
       - name: Cache