Add workflow to sync rush.json version on changes (#241)

This workflow automates the synchronization of rush.json version when
changes are detected in package.json or rush.json. It includes steps for
detecting changes, updating rush.json, running rush update, and
committing the changes.

Author: nev21

.github/workflows/sync-rush-versions.yml

@@ -0,0 +1,84 @@
+name: Sync Rush.json Version
+on:
+  pull_request:
+    types: [opened, synchronize]
+    paths:
+      - "**/package.json"
+      - "rush.json"
+      - "common-versions.json"
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  detect:
+    runs-on: ubuntu-latest
+    if: github.actor == 'dependabot[bot]'
+    outputs:
+      rush_changed: ${{ steps.detect.outputs.rush_changed }}
+    steps:
+      - uses: actions/checkout@v6
+        with:
+          fetch-depth: 2  # Fetch current commit + previous commit
+      - name: Detect Rush bump
+        id: detect
+        run: |
+          # Look for @microsoft/rush in the diff
+          if git diff -U0 HEAD~1 -- package.json | grep '"@microsoft/rush"'; then
+            echo "rush_changed=true" >> $GITHUB_OUTPUT
+            echo "Rush change detected"
+          else
+            echo "rush_changed=false" >> $GITHUB_OUTPUT
+            echo "No Rush change detected"
+          fi
+
+  update:
+    runs-on: ubuntu-latest
+    needs: detect
+    if: needs.detect.outputs.rush_changed == 'true'
+    steps:
+      - uses: actions/checkout@v6
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          fetch-depth: 0
+          ref: ${{ github.head_ref }}
+
+      - name: Setup Node
+        uses: actions/setup-node@v6
+        with:
+          node-version: 20
+
+      - name: Install Rush
+        run: npm install -g @microsoft/rush
+
+      - name: Sync rush.json
+        run: |
+          echo "Syncing rush.json with Dependabot bump..."
+          # Extract new Rush version from package.json
+          NEW_VERSION=$(jq -r '.devDependencies["@microsoft/rush"] // .dependencies["@microsoft/rush"]' package.json)
+
+          # Update rush.json version field
+          jq ".rushVersion = \"$NEW_VERSION\"" rush.json > rush.tmp.json
+          mv rush.tmp.json rush.json
+
+      - name: Run rush update
+        run: |
+          rush update --full
+
+      - name: Commit changes
+        run: |
+          git config --global user.name "dependabot-sync[bot]"
+          git config --global user.email "dependabot-sync[bot]@users.noreply.github.com"
+          # Add files that exist
+          if [ -f rush.json ]; then git add rush.json; fi
+          if [ -f common-versions.json ]; then git add common-versions.json; fi
+          if [ -f common/config/rush/npm-shrinkwrap.json ]; then git add common/config/rush/npm-shrinkwrap.json; fi
+          # Add all changes in common/scripts folder if it exists
+          if [ -d common/scripts ]; then git add common/scripts/; fi
+          if git diff --staged --quiet; then
+            echo "No changes to commit."
+          else
+            git commit -m "chore: sync rush.json and regenerate lockfiles"
+            git push
+          fi