name: Mac Runner Concurrency Test
on: [workflow_dispatch, push]

jobs:
  long-job-a:
    name: Long job A
    runs-on: macos-arm64
    steps:
      - name: Print info
        run: |
          echo "Job A on $(uname -a)"
          sw_vers || true
          whoami
          pwd

      - name: Create artifact
        run: |
          mkdir -p _work/concurrentA
          echo "concurrent A" > _work/concurrentA/marker.txt
          ls -lah _work/concurrentA

      - name: Simulate long work
        run: |
          echo "Sleeping to simulate long task..."
          sleep 60

  long-job-b:
    name: Long job B
    runs-on: macos-arm64
    steps:
      - name: Print info
        run: |
          echo "Job B on $(uname -a)"
          sw_vers || true
          whoami
          pwd

      - name: Create artifact
        run: |
          mkdir -p _work/concurrentB
          echo "concurrent B" > _work/concurrentB/marker.txt
          ls -lah _work/concurrentB

      - name: Simulate long work
        run: |
          echo "Sleeping to simulate long task..."
          sleep 60

  inspect-after:
    name: Inspect after concurrency
    runs-on: macos-arm64
    needs: [long-job-a, long-job-b]
    steps:
      - name: List act_runner directory
        run: |
          echo "Listing /var/lib/act_runner contents"
          sudo ls -lah /var/lib/act_runner || true

      - name: Find _work directories and sizes
        run: |
          sudo find /var/lib/act_runner -type d -name '_work' -print -exec sudo du -sh {} + || true

      - name: Fail if artifacts left
        run: |
          echo "Checking for marker files"
          sudo find /var/lib/act_runner -type f -name 'marker.txt' -print
          # Do not fail intentionally; user can inspect results and choose cleanup