.github/workflows/get-pr-number.yml

name: Get PR number
on:
  workflow_call:
    outputs:
      PR_NUMBER:
        description: "The extracted PR number"
        value: ${{ jobs.get-pr-number.outputs.PR_NUMBER }}

jobs:
  get-pr-number:
    runs-on: ubuntu-22.04
    name: Get PR number
    outputs:
      PR_NUMBER: ${{ steps.set_pr_number.outputs.PR_NUMBER }}
    steps:
      - name: Get PR number
        shell: bash
        env:
          issue_number: ${{ github.event.issue.number }}
          is_pull_request_issue: ${{ github.event.issue.pull_request != null }}
          pr_number: ${{ github.event.pull_request.number }}
          is_pull_request: ${{ github.event.pull_request != null }}
          event_number: ${{ github.event.number }}
        run: |
          if [[ "$issue_number" != "" && "$is_pull_request_issue" == "true" ]]; then
            echo "PR_NUMBER=$issue_number" >> $GITHUB_ENV
          elif [[ "$pr_number" != "" ]]; then
            echo "PR_NUMBER=$pr_number" >> $GITHUB_ENV
          elif [[ "$is_pull_request" == "true" ]]; then
            echo "PR_NUMBER=$event_number" >> $GITHUB_ENV
          else
            echo "PR_NUMBER=" >> $GITHUB_ENV
          fi

      - name: Check PR number
        shell: bash
        run: |
          echo "$PR_NUMBER"

      - name: Set PR number
        id: set_pr_number
        run: echo "PR_NUMBER=$PR_NUMBER" >> "$GITHUB_OUTPUT"