GitHub Action to add a GitHub status link to a CircleCI artifact.

Sample .github/workflows/main.yml:

on: [status]
jobs:
  circleci_artifacts_redirector_job:
    runs-on: ubuntu-latest
    name: Run CircleCI artifacts redirector
    steps:
      - name: GitHub Action step
        id: step1
        uses: larsoner/circleci-artifacts-redirector-action@master
        with:
          repo-token: ${{ secrets.GITHUB_TOKEN }}
          artifact-path: 0/test_artifacts/root_artifact.md
          circleci-jobs: build_doc
      - name: Check the URL
        run: |
          curl --fail ${{ steps.step1.outputs.url }} | grep $GITHUB_SHA

• The artifact-path should point to an artifact path from your CircleCI build. This is typically whatever follows the CircleCI artifact root path, for example 0/test_artifacts/root_artifact.md.
• The circleci-jobs is a comma-separated list of jobs to monitor, but usually there is a single one that you want an artifact path for. The default is "build_docs,build,doc", which will look for any jobs with these names and create an artifacts link for them.
• If you have trouble, try enabling debugging logging for the action by setting the secret ACTIONS_STEP_DEBUG=true.

Note: The standard PR-to-main-repo-from-branch-in-a-fork workflow might not activate the action. For changes to take effect, changes might need to be made to to the default branch in a repo with the action enabled. For example, you could iterate directly in master, or in master of a fork. This seems to be a limitation of the fact that CircleCI uses the status (rather than app) API and that this is always tied to the master/default branch of a given repository.

Currently has (known) limitations:

• Tests do not test anything (haven't gotten around to fixing them)
• Only allows redirecting to a single file that must be configured ahead of time as a file (cannot be changed within the CircleCI run)

Eventually this might be fixable by a bit of work and addition of customization options.