Does not stop previous workflows if the PR is made from a fork.

[dvkruchinin]

Hi.

I implemented it in my fork, but for some reason the previous workflows don't stop if I updated the PR.
Part of main.yml:

name: CI
on:
  push:
    branches:
      - 'master'
      - 'develop'
  pull_request:
    branches:
      - '*'
jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - name: Cancel previous runs
        uses: styfle/cancel-workflow-action@0.8.0
        with:
          access_token: ${{ github.token }}
      - uses: actions/checkout@v2
      ...

cancel.yml:

name: Cancel
on:
  workflow_run:
    workflows: ["CI"]
    types:
      - requested
jobs:
  cancel:
    runs-on: ubuntu-latest
    steps:
    - uses: styfle/cancel-workflow-action@0.8.0
      with:
        workflow_id: ${{ github.event.workflow.id }}

When creating a PR from the current repository, it works fine.
But when creating a PR from a fork. No reaction.
From main.yml I got an error:

Found 6 runs for workflow 4551668 on branch check-workflow-canceling
- https://github.com/dvkruchinin/cvat/actions/runs/726508310
- https://github.com/dvkruchinin/cvat/actions/runs/726502076
- https://github.com/dvkruchinin/cvat/actions/runs/726489962
- https://github.com/dvkruchinin/cvat/actions/runs/726361555
- https://github.com/dvkruchinin/cvat/actions/runs/726315700
- https://github.com/dvkruchinin/cvat/actions/runs/726311604
with 2 runs to cancel.
Canceling run:  {
  id: 726502076,
  head_sha: '49509b67436b6704a7151bcdfd670e2b079622d4',
  status: 'in_progress',
  html_url: 'https://github.com/dvkruchinin/cvat/actions/runs/726502076'
}
Error while canceling workflow_id 4551668: Resource not accessible by integration

Please tell me what I'm doing wrong?

[styfle]

cc @ericmatte who added this in #50

cc @pllim who added this in #55

[pllim]

Don't put the cancel in main.yml CI. It won't work there. Check the log in Cancel. I bet that one still work.

tl:dr; delete cancel step from main.yml

[rfay]

I don't think cancelling in a PR works at all. The access_token: ${{ github.token }} isn't provided on a forked PR is it?