build: use the reusable pr-automerge-open-release workflow

.github/workflows/pr-automerge-open-release.yml

@@ -1,67 +1,29 @@
-# For non-draft changes to Named Release branches:
-# - Check if the user belongs to a maintainers team.
+# For non-draft changes to named release branches:
+# - Check if the user is a maintainer (listed in the MERGERS env var in the
+#     .github/workflows/pr-automerge-open-release.yml workflow).
 # - If so, approve the pull request.
-#   - Tag community-engineering (for now) and the maintainers team.
-#   - Merge the PR when the author comments `@edx-community-bot merge`.
+#   - Merge the PR when the author comments `@openedx-community-bot merge`.
+#
 # Required organization secrets
-# - CC_GITHUB_TOKEN=...
-# - CC_TEAM_CHAMPIONS=org/team-name
-# - CC_TEAM_CONTRIBUTORS_ORG=org
-# - CC_TEAM_CONTRIBUTORS_TEAM=team-name
----
-name: automerge BTR open-release PRs
+# - CC_GITHUB_TOKEN or GITHUB_TOKEN
+
+name: Automerge BTR open-release PRs
+
 on:
   issue_comment:
     branches:
-    - open-release/*
+      - open-release/*
     types:
-    - created
-    - edited
+      - created
+      - edited
   pull_request_target:
     branches:
-    - open-release/*
+      - open-release/*
     types:
-    - opened
-    - edited
-    - ready_for_review
+      - opened
+      - edited
+      - ready_for_review
+
 jobs:
   automerge:
-    if: ${{ (github.event.issue.pull_request && !github.event.issue.pull_request.draft) || (github.event.pull_request && !github.event.pull_request.draft) }}
-    runs-on: ubuntu-latest
-    steps:
-    - name: lookup teams
-      id: teams
-      uses: tspascoal/get-user-teams-membership@v1
-      with:
-        username: "${{ github.actor }}"
-        organization: ${{ secrets.CC_TEAM_CONTRIBUTORS_ORG }}
-        team: ${{ secrets.CC_TEAM_CONTRIBUTORS_TEAM }}
-        GITHUB_TOKEN: "${{ secrets.CC_GITHUB_TOKEN || secrets.GITHUB_TOKEN }}"
-    - name: approve PR
-      if: ${{ steps.teams.outputs.isTeamMember == 'true' && (github.event.action == 'opened' || github.event.action == 'ready_for_review') }}
-      uses: andrewmusgrave/automatic-pull-request-review@0.0.5
-      with:
-        repo-token: ${{ secrets.CC_GITHUB_TOKEN || secrets.GITHUB_TOKEN }}
-        event: APPROVE
-        body: |
-          :+1:
-
-          When you're ready to merge, add a comment that says
-          > @edx-community-bot merge
-
-          and we'll handle the rest!
-          CC: @${{ secrets.CC_TEAM_CHAMPIONS }} @${{ secrets.CC_TEAM_CONTRIBUTORS_ORG }}/${{ secrets.CC_TEAM_CONTRIBUTORS_TEAM }}
-    - name: label PR as auto-mergeable
-      if: ${{ steps.teams.outputs.isTeamMember == 'true' && contains(github.event.comment.body, '@edx-community-bot merge') }}
-      uses: andymckay/labeler@978f846c4ca6299fd136f465b42c5e87aca28cac
-      with:
-        add-labels: 'automerge'
-        repo-token: ${{ secrets.CC_GITHUB_TOKEN || secrets.GITHUB_TOKEN }}
-    - name: automerge
-      uses: "pascalgn/automerge-action@v0.13.1"
-      env:
-        GITHUB_TOKEN: "${{ secrets.CC_GITHUB_TOKEN || secrets.GITHUB_TOKEN }}"
-        MERGE_COMMIT_MESSAGE: |
-          merge(#{pullRequest.number}): {pullRequest.title}
-
-          {pullRequest.body}
+    uses: openedx/.github/.github/workflows/pr-automerge-open-release.yml@master