fix(ci): compute version number dynamically in MacOS workflow

Author: sampajano

.github/workflows/make-plugin-mac-os.yml

@@ -1,6 +1,12 @@
 name: Make MacOS Plugin
 
 on:
+  push:
+    paths:
+      - .github/workflows/make-plugin-mac-os.yml
+  pull_request:
+    paths:
+      - .github/workflows/make-plugin-mac-os.yml
   workflow_dispatch:
     inputs:
       version_number:
@@ -13,6 +19,17 @@ jobs:
     runs-on: macos-14
     steps:
       - uses: actions/checkout@v3
+      - name: Compute VERSION_NUMBER
+        run: |
+          INPUT_VERSION="${{ github.event.inputs.version_number }}"
+          if [ -n "$INPUT_VERSION" ]; then
+            VERSION="$INPUT_VERSION"
+          else
+            VERSION="$GITHUB_REF_NAME"
+          fi
+          # Minimal sanitization: replace slashes with dashes to keep filenames valid
+          VERSION="${VERSION//\//-}"
+          echo "VERSION_NUMBER=$VERSION" >> "$GITHUB_ENV"
       - name: Install Bazelisk (Bazel)
         run: |
           brew update
@@ -25,13 +42,13 @@ jobs:
       - name: move
         run: |
           mv bazel-bin/javascript/net/grpc/web/generator/protoc-gen-grpc-web \
-            ./protoc-gen-grpc-web-${{ github.event.inputs.version_number }}-darwin-x86_64
+            ./protoc-gen-grpc-web-${VERSION_NUMBER}-darwin-x86_64
       - name: gen sha256
         run: |
-          openssl dgst -sha256 -r -out protoc-gen-grpc-web-${{ github.event.inputs.version_number }}-darwin-x86_64.sha256 \
-            protoc-gen-grpc-web-${{ github.event.inputs.version_number }}-darwin-x86_64
+          openssl dgst -sha256 -r -out protoc-gen-grpc-web-${VERSION_NUMBER}-darwin-x86_64.sha256 \
+            protoc-gen-grpc-web-${VERSION_NUMBER}-darwin-x86_64
       - name: verify sha256
-        run: shasum -a 256 -c protoc-gen-grpc-web-${{ github.event.inputs.version_number }}-darwin-x86_64.sha256
+        run: shasum -a 256 -c protoc-gen-grpc-web-${VERSION_NUMBER}-darwin-x86_64.sha256
       - name: Upload artifacts
         uses: actions/upload-artifact@v4
         with: