Merge pull request #2850 from AlchemyCMS/unify-build-workflow

[CI] Unify build workflow into one file again

.github/workflows/build_test.yml

@@ -14,11 +14,47 @@ on:
   pull_request:
 
 jobs:
-  Build:
-    uses: ./.github/workflows/build.yml
+  check_yarn_lock:
+    runs-on: ubuntu-latest
+    name: Check yarn.lock
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0 # Fetch all history
+      - name: Get changed files
+        id: changed-yarn-lock
+        uses: tj-actions/changed-files@v41
+        with:
+          files: yarn.lock
+    outputs:
+      yarn_lock_changed: ${{ steps.changed-yarn-lock.outputs.any_changed }}
+
+  build_javascript:
+    runs-on: ubuntu-latest
+    name: Build JS packages
+    needs: check_yarn_lock
+    if: needs.check_yarn_lock.outputs.yarn_lock_changed == 'true'
+    steps:
+      - uses: actions/checkout@v4
+      - name: Setup Node
+        uses: actions/setup-node@v4
+        with:
+          cache: "yarn"
+      - name: Restore node_modules cache
+        uses: actions/cache@v4
+        with:
+          path: node_modules
+          key: ${{ runner.os }}-node-modules-${{ hashFiles('yarn.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-node-modules
+      - name: Install dependencies
+        run: yarn install
+      - name: YARN build
+        run: yarn build
 
   RSpec:
-    needs: Build
+    needs: [check_yarn_lock, build_javascript]
+    if: ${{ success('check_yarn_lock') && !failure('build_javascript')}}
     runs-on: ubuntu-latest
     strategy:
       fail-fast: false