sync: update .github/actions/warm-cache/action.yml from source repository

Author: mrz1836

.github/actions/warm-cache/action.yml

@@ -160,9 +160,10 @@ runs:
         fi
 
     # --------------------------------------------------------------------
-    # Ensure go.sum exists and download modules
+    # Ensure go.sum exists (single-module mode only)
     # --------------------------------------------------------------------
-    - name: 📋 Ensure go.sum exists
+    - name: 📋 Ensure go.sum exists (single-module)
+      if: ${{ inputs.enable-multi-module != 'true' }}
       shell: bash
       run: |
         GO_SUM_FILE="${{ inputs.go-sum-file }}"
@@ -171,11 +172,7 @@ runs:
         echo "🔍 Checking for go.sum file at: $GO_SUM_FILE"
         if [ ! -f "$GO_SUM_FILE" ]; then
           echo "⚠️ Go.sum not found at $GO_SUM_FILE, running 'magex tidy' to generate it."
-          if [ "$ENABLE_MULTI_MODULE_TESTING" == "true" ]; then
-            echo "🔧 Multi-module mode - running magex tidy from repository root"
-            echo "📦 magex will discover all Go modules"
-            magex tidy
-          elif [ -n "$GO_MODULE_DIR" ]; then
+          if [ -n "$GO_MODULE_DIR" ]; then
             echo "🔧 Running magex tidy from directory: $GO_MODULE_DIR"
             (cd "$GO_MODULE_DIR" && magex tidy)
           else
@@ -187,6 +184,43 @@ runs:
           echo "✅ Go.sum already exists at $GO_SUM_FILE"
         fi
 
+    # --------------------------------------------------------------------
+    # Ensure all modules are tidy (multi-module mode only)
+    # Handles both go.work workspaces and single-module repos with multi-module testing enabled
+    # --------------------------------------------------------------------
+    - name: 📋 Ensure modules are tidy (multi-module)
+      if: ${{ inputs.enable-multi-module == 'true' }}
+      shell: bash
+      run: |
+        echo "🔧 Multi-module mode - detecting workspace configuration"
+
+        # Check if go.work exists (workspace mode)
+        if [ -f "go.work" ]; then
+          echo "📦 go.work workspace detected - syncing and tidying all modules"
+          echo "ℹ️  No root go.sum validation required (go.work manages workspace modules)"
+
+          # Sync the workspace
+          echo "🔄 Running 'go work sync' to synchronize workspace modules..."
+          go work sync
+
+          # Find and tidy each module in the workspace
+          echo "🔍 Finding all modules in workspace..."
+          go list -f '{{.Dir}}' -m | while read -r module_dir; do
+            if [ -f "$module_dir/go.mod" ]; then
+              echo "🔧 Tidying module: $module_dir"
+              (cd "$module_dir" && go mod tidy)
+            fi
+          done
+
+          echo "✅ All workspace modules synced and tidied successfully"
+        else
+          # No go.work - single module with multi-module testing enabled
+          echo "📁 No go.work file - running single module tidy from repository root"
+          echo "ℹ️  Multi-module testing mode without workspace (legacy behavior)"
+          magex tidy
+          echo "✅ Module tidied successfully"
+        fi
+
     # ────────────────────────────────────────────────────────────────────────────
     # Ensure cache directories exist
     # ────────────────────────────────────────────────────────────────────────────