Test merge queue skip logic [This is a test, please ignore]

.github/actions/check-merge-queue/action.yml

@@ -0,0 +1,91 @@
+name: Check merge queue
+description: Check whether a pull request can skip the merge queue when it's
+  up-to-date with the base branch.
+
+inputs:
+  head-ref:
+    description: The name of the head ref (the pull request branch).
+    required: true
+    default: ${{ github.event.merge_group.head_ref }}
+
+  base-ref:
+    description: The name of the base ref (e.g., main, master).
+    required: true
+    default: main
+
+  github-token:
+    description: The GitHub token to use for authentication.
+    required: true
+    default: ${{ github.token }}
+
+outputs:
+  up-to-date:
+    value: ${{ steps.up-to-date.outputs.up-to-date }}
+    description: Whether the pull request is up-to-date with the base branch
+      and is first in the merge queue, allowing it to skip the merge queue.
+
+runs:
+  using: composite
+  steps:
+    - name: Checkout repository
+      uses: actions/checkout@v6
+      with:
+        fetch-depth: 0
+
+    - name: Get pull request details
+      id: pr-details
+      uses: actions/github-script@v8
+      env:
+        HEAD_REF: ${{ inputs.head-ref }}
+      with:
+        github-token: ${{ inputs.github-token }}
+        script: |
+          const { HEAD_REF } = process.env;
+          const match = HEAD_REF.match(/\/pr-([0-9]+)-/u);
+          if (!match) {
+            return core.setFailed(`Could not extract pull request number from head ref: "${HEAD_REF}".`);
+          }
+
+          const number = parseInt(match[1], 10);
+          const result = await github.graphql(`
+            query($owner: String!, $name: String!, $number: Int!) {
+              repository(owner: $owner, name: $name) {
+                pullRequest(number: $number) {
+                  headRefName
+                  mergeQueueEntry { position }
+                }
+              }
+            }
+          `, {
+            owner: context.repo.owner,
+            name: context.repo.repo,
+            number,
+          });
+
+          if (!result.repository.pullRequest) {
+            return core.setFailed(`Pull request #${number} not found in repository "${context.repo.owner}/${context.repo.repo}".`);
+          }
+
+          const position = result.repository.pullRequest.mergeQueueEntry?.position;
+          if (!position) {
+            return core.setFailed(`Pull request #${number} is not in the merge queue.`);
+          }
+
+          core.setOutput('pr-number', number);
+          core.setOutput('pr-branch', result.repository.pullRequest.headRefName);
+          core.setOutput('merge-queue-position', position);
+
+    - name: Check if pull request is up-to-date with base branch
+      id: up-to-date
+      shell: bash
+      env:
+        BASE_REF: ${{ inputs.base-ref }}
+        PR_BRANCH: ${{ steps.pr-details.outputs.pr-branch }}
+        MERGE_QUEUE_POSITION: ${{ steps.pr-details.outputs.merge-queue-position }}
+      run: |
+        set -euo pipefail
+        if git merge-base --is-ancestor "origin/${BASE_REF}" "origin/${PR_BRANCH}" && [ "${MERGE_QUEUE_POSITION}" -eq 1 ]; then
+          echo "up-to-date=true" >> "$GITHUB_OUTPUT"
+        else
+          echo "up-to-date=false" >> "$GITHUB_OUTPUT"
+        fi

.github/workflows/main.yml

@@ -11,8 +11,28 @@ concurrency:
   cancel-in-progress: ${{ !contains(github.ref, 'refs/heads/main') }}
 
 jobs:
+  check-skip-merge-queue:
+    name: Check if pull request can skip merge queue
+    if: github.event_name == 'merge_group'
+    runs-on: ubuntu-latest
+    outputs:
+      skip-merge-queue: ${{ steps.check-skip-merge-queue.outputs.up-to-date }}
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v6
+      - name: Check pull request merge queue status
+        id: check-skip-merge-queue
+        uses: ./.github/actions/check-merge-queue
+        with:
+          head-ref: ${{ github.event.merge_group.head_ref }}
+          base-ref: main
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+
   check-workflows:
     name: Check workflows
+    needs:
+      - check-skip-merge-queue
+    if: always() && github.event_name != 'merge_group' || needs.check-skip-merge-queue.outputs.skip-merge-queue != 'true'
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v5
@@ -24,6 +44,14 @@ jobs:
         run: ${{ steps.download-actionlint.outputs.executable }} -color
         shell: bash
 
+  print-job-status:
+    needs: check-workflows
+    runs-on: ubuntu-latest
+    if: ${{ success() }}
+    steps:
+      - run: echo "${{ job.status }}"
+        shell: bash
+
   analyse-code:
     name: Analyse code
     needs: check-workflows
@@ -127,11 +155,14 @@ jobs:
     name: All jobs pass
     if: ${{ always() }}
     runs-on: ubuntu-latest
-    needs: all-jobs-complete
+    needs:
+      - all-jobs-complete
+      - check-skip-merge-queue
+    env:
+      PASSED: ${{ needs.all-jobs-complete.outputs.passed == 'true' || needs.check-skip-merge-queue.outputs.skip-merge-queue == 'true' }}
     steps:
       - name: Check that all jobs have passed
         run: |
-          passed="${{ needs.all-jobs-complete.outputs.passed }}"
-          if [[ $passed != "true" ]]; then
+          if [[ "$PASSED" != "true" ]]; then
             exit 1
           fi