rerun.yml

# adapted from https://github.com/orgs/community/discussions/67654
# altered to not rerun if we are not the newest commit in the run's branch (exception for master/main)
on:
  workflow_dispatch:
    inputs:
      run_id:
        required: true

jobs:
  rerun:
    runs-on: ubuntu-latest
    permissions:
      actions: write  # Needed for 'gh run rerun'
    steps:
      - name: Wait for run to finish
        env:
          GH_REPO: ${{ github.repository }}
          GH_TOKEN: ${{ github.token }}
          GH_DEBUG: api
        run: |
          gh run watch ${{ inputs.run_id }} > /dev/null 2>&1

      - name: Rerun failed jobs if the commit is the latest on the branch
        env:
          GH_REPO: ${{ github.repository }}
          GH_TOKEN: ${{ github.token }}
          GH_DEBUG: api
        run: |
          RUN_ID="${{ inputs.run_id }}"
          # Get the run details
          RUN_INFO=$(gh run view $RUN_ID --json headSha,headBranch,event)
          # Extract the commit SHA, branch name, and event type
          COMMIT_SHA=$(echo "$RUN_INFO" | jq -r '.headSha')
          BRANCH_NAME=$(echo "$RUN_INFO" | jq -r '.headBranch')
          EVENT_TYPE=$(echo "$RUN_INFO" | jq -r '.event')

          # Only proceed if the event is a pull_request
          if [[ "$EVENT_TYPE" != "pull_request" ]]; then
            echo "Event type is $EVENT_TYPE. Skipping rerun."
            exit 0
          fi

          # Get the latest commit SHA on the branch
          LATEST_COMMIT_SHA=$(gh api repos/${{ github.repository }}/commits/$BRANCH_NAME --jq .sha)

          # Compare the SHAs
          if [[ "$COMMIT_SHA" != "$LATEST_COMMIT_SHA" ]] && [[ "$BRANCH_NAME" != "master" && "$BRANCH_NAME" != "main" ]] ; then
            echo "Commit $COMMIT_SHA is not the latest commit on branch $BRANCH_NAME (latest is $LATEST_COMMIT_SHA) and the branch is not master/main. Skipping rerun."
          else
            echo "Commit $COMMIT_SHA is the latest on branch $BRANCH_NAME. Proceeding with rerun."
            gh run rerun ${{ inputs.run_id }} --failed
          fi