Add a dummy workflow to succeed DCO check on merge queues (#366)

See #363 for
more details.

.github/workflows/ci.yaml

@@ -67,10 +67,16 @@ jobs:
           path: dist/
           if-no-files-found: error
 
-  generate-docs-pr:
-    if: github.event_name == 'pull_request'
+  test-generate-docs:
+    # This could be github.event_name != 'push', but that's not being triggered
+    # for merge_group for some reason
+    if: github.event_name == 'pull_request' || github.event_name == 'merge_group' || github.event_name == 'workflow_dispatch'
     runs-on: ubuntu-20.04
     steps:
+      - name: DEBUG INFO
+        env:
+          GITHUB_EVENT_NAME: ${{ github.event_name }}
+        run: echo $GITHUB_EVENT_NAME
       - name: Fetch sources
         uses: actions/checkout@v3
 
@@ -89,7 +95,7 @@ jobs:
 
       - name: Generate the documentation
         env:
-          MIKE_VERSION: pr-${{ github.event.number }}
+          MIKE_VERSION: gh-${{ github.job }}
         run: |
           mike deploy $MIKE_VERSION
           mike set-default $MIKE_VERSION
@@ -103,7 +109,8 @@ jobs:
 
   publish-docs:
     needs: ["test", "build-dist"]
-    if: github.event_name == 'push'
+      # We shouldn't need the reference name here, but `merge_group` is being executed as if it was `push`
+    if: github.event_name == 'push' && (github.ref == 'refs/heads/v0.x.x' || startsWith(github.ref, 'refs/tags/'))
     runs-on: ubuntu-20.04
     permissions:
       contents: write
@@ -180,7 +187,7 @@ jobs:
   create-github-release:
     needs: ["publish-docs"]
     # Create a release only on tags creation
-    if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags')
+    if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags/')
     permissions:
       # We need write permissions on contents to create GitHub releases and on
       # discussions to create the release announcement in the discussion forums

.github/workflows/dco-merge-queue.yml

@@ -0,0 +1,11 @@
+# Based on https://github.com/hyperledger/besu/pull/5207/files
+name: DCO
+on:
+  merge_group:
+
+jobs:
+  DCO:
+    runs-on: ubuntu-latest
+    if: ${{ github.actor != 'dependabot[bot]' }}
+    steps:
+      - run: echo "This DCO job runs on merge_queue event and doesn't check PR contents"