add auto-tag release workflow github action

Author: martinemde

.github/workflows/tag.yml

@@ -0,0 +1,47 @@
+name: Tag Release
+
+env:
+  GEM_NAME: query_packwerk
+  GEM_CLASS_NAME: QueryPackwerk
+
+on:
+  pull_request:
+    types: [closed]
+    branches: [main]
+
+jobs:
+  release:
+    if: github.event.pull_request.merged == true
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: 3.2
+
+      - name: Determine release type
+        id: version
+        run: |
+          if [[ "${{ github.event.pull_request.labels[*] }}" == *"major"* ]]; then
+            echo "bump=major" >> $GITHUB_OUTPUT
+          elif [[ "${{ github.event.pull_request.labels[*] }}" == *"minor"* ]]; then
+            echo "bump=minor" >> $GITHUB_OUTPUT
+          else
+            echo "bump=patch" >> $GITHUB_OUTPUT
+          fi
+
+      - name: Bump version
+        run: |
+          gem install bump
+          bump ${{ steps.version.outputs.bump }}
+
+      - name: Commit and tag version bump
+        run: |
+          git config user.name "github-actions"
+          git config user.email "[email protected]"
+          git commit -am "Bump version"
+          VERSION=$(ruby -e "require './lib/${{ env.GEM_NAME }}/version'; puts ${{ env.GEM_CLASS_NAME }}::VERSION")
+          git tag "v$VERSION"
+          git push --follow-tags

Gemfile.lock

@@ -67,7 +67,7 @@ GEM
       crass (~> 1.0.2)
       nokogiri (>= 1.12.0)
     method_source (1.1.0)
-    mini_portile2 (2.8.8)
+    mini_portile2 (2.8.9)
     minitest (5.25.5)
     netrc (0.11.0)
     nokogiri (1.18.5)