add_assignee_when_pr_opened.yml

# See https://confluence.diamond.ac.uk/x/tJqQC for instructions if this needs a new token
name: Assign author of pull request to referenced issue that was not assigned to issue ticket beforehand
on:
 pull_request:
      types: [ready_for_review, opened, review_requested]
jobs:
  get_author_of_pull_request_query:
    uses: ./.github/workflows/get_issue_from_pr.yml
    with:
      pr_id: ${{ github.event.pull_request.number }}
    secrets: inherit

  assign_author_to_issue_mutation:
    runs-on: ubuntu-latest
    needs: get_author_of_pull_request_query
    steps:
      - id: mutation_to_add_author
        env:
          GITHUB_TOKEN: ${{ secrets.GHPROJECT_TOKEN }}
        run: |
          gh api graphql -f query='
            mutation ($assignable_id: ID!, $author_id: [ID!]! ){
              addAssigneesToAssignable(input:{assignableId: $assignable_id, assigneeIds: $author_id }) {
                clientMutationId
                }
              }' -f assignable_id=${{ needs.get_author_of_pull_request_query.outputs.issue_from_pr }} -f author_id=${{ needs.get_author_of_pull_request_query.outputs.author }}