sample-python/.github/workflows/check.yml at main · v-jitenderpalsingh/sample-python · GitHub

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name: Test fetchValidManifest (transient failure)

on:
  workflow_dispatch:

jobs:
  retry-recovers:
    name: API blackout, expect retry to recover
    runs-on: ubuntu-latest
    env:
      ACTIONS_STEP_DEBUG: true
    steps:
      - uses: actions/checkout@v6

      # Block api.github.com by pointing it to a loopback that drops :443.
      # Attempt #1 fails immediately (connection refused). fetchValidManifest
      # sleeps 1s, attempt #2 fails, it sleeps 2s. We restore DNS at t=2.5s
      # so attempt #3 succeeds -- exercising the retry-with-backoff branch
      # WITHOUT falling through to the raw-URL source.
      - name: Start blackout (api.github.com -> 127.0.0.1)
        run: |
          echo "127.0.0.1 api.github.com" | sudo tee -a /etc/hosts
          ( sleep 2.5 && sudo sed -i '/127\.0\.0\.1 api\.github\.com/d' /etc/hosts && echo "RESTORED at $(date +%T.%N)" ) &
          disown
          echo "BLOCKED  at $(date +%T.%N)"

      - name: Setup Python (force manifest fetch)
        id: setup
        uses: actions/setup-python@v6
        with:
          python-version: '3.11'   # range -> resolves to newest 3.11.x in manifest
          check-latest: true       # forces getManifest() even if 3.11 is pre-installed

      - name: Verify install succeeded
        run: |
          echo "Resolved: ${{ steps.setup.outputs.python-version }}"
          python -c "import sys; print(sys.version)"

  retry-exhausted-falls-back-to-url:
    name: API permanently down, expect raw-URL fallback
    runs-on: ubuntu-latest
    env:
      ACTIONS_STEP_DEBUG: true
    steps:
      - uses: actions/checkout@v6

      # Keep api.github.com unreachable for the whole run. fetchValidManifest
      # burns all 3 attempts on the API source, getManifest() catches the error
      # and falls back to raw.githubusercontent.com (still reachable).
      - name: Permanent API blackout
        run: echo "127.0.0.1 api.github.com" | sudo tee -a /etc/hosts

      - name: Setup Python (must use URL fallback)
        id: setup
        uses: actions/setup-python@v6
        with:
          python-version: '3.13'
          check-latest: true

      - name: Verify install succeeded via fallback
        run: |
          echo "Resolved: ${{ steps.setup.outputs.python-version }}"
          python -c "import sys; print(sys.version)"