Fix cancelling of Pull Request builds when image build fails

[potiuk]

When image build fails, the pull request that triggered it should
be cancelled. The #15944 introduced rewrite of the GitHub actions
code but by mistake it also introduced a failure in cancelling
the PR workflow by missing pipeline to jq.

In most cases it did not matter, but it cause "wait for images"
in PRs to run far longer than they should be.

This PR restores cancelling feature.

---

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[potiuk]

Hey @ashb - I will test the cancelling after the change but I believe it might explain some "far too long" runnig "wait for image" jobs in case we had breaking "build image" changes in main.

[malthe]

I propose a change to use --jq which is used elsewhere in the script rather than piping.

[potiuk]

I propose a change to use --jq which is used elsewhere in the script rather than piping.

Thanks @malthe - we are in the process of rewriting all the scripts to python (including those small snippets) as part of #12282 so let's have minimal changes here.

I tested tha in https://github.com/potiuk/airflow/runs/4865079794?check_suite_focus=true and piping works as expected:

  if [[ "push" == 'pull_request_target' ]]; then
    event_filter="event=pull_request&"
  else
    branch="${GITHUB_REF#refs/heads/}"
    event_filter=""
  fi
  
  for cancel_url in $(
      gh api "/repos/$GITHUB_REPOSITORY/actions/runs?${event_filter}branch=${branch}" | \
          jq -r '
            .workflow_runs[] |
            select(.head_sha == $ENV.GITHUB_REGISTRY_PUSH_IMAGE_TAG and .status != "completed") |
            .cancel_url
          ' \
  ); do
    # One of these URls will be _this_ workflow, so lets exclude that!
    [[ $cancel_url  == */$thisRun/* ]] && continue
  
    echo "Cancelling $cancel_url"
    gh api -X POST --silent "$cancel_url"
  done
  shell: /usr/bin/bash -e {0}
  env:
    MOUNT_SELECTED_LOCAL_SOURCES: false
    FORCE_ANSWER_TO_QUESTIONS: yes
    CHECK_IMAGE_FOR_REBUILD: true
    SKIP_CHECK_REMOTE_IMAGE: true
    DB_RESET: true
    VERBOSE: true
    GITHUB_REPOSITORY: potiuk/airflow
    GITHUB_USERNAME: potiuk
    CONSTRAINTS_GITHUB_REPOSITORY: apache/airflow
    GITHUB_TOKEN: ***
    GITHUB_REGISTRY_PULL_IMAGE_TAG: latest
    GITHUB_REGISTRY_WAIT_FOR_IMAGE: false
    INSTALL_PROVIDERS_FROM_SOURCES: true
    AIRFLOW_LOGIN_TO_GITHUB_REGISTRY: true
    GITHUB_REGISTRY_PUSH_IMAGE_TAG: 2050e628f8e5fd18b8b13b5c52dcbf3daad003bc
    branch: 
    thisRun: 1717050085
Cancelling https://api.github.com/repos/potiuk/airflow/actions/runs/1717050086/cancel

[github-actions]

The PR most likely needs to run full matrix of tests because it modifies parts of the core of Airflow. However, committers might decide to merge it quickly and take the risk. If they don't merge it quickly - please rebase it to the latest main at your convenience, or amend the last commit of the PR, and push it with --force-with-lease.