fpp/.github/workflows/retry-failed-builds.yml at 6f26fbe55e912f28a47a92c1129afe761b47348c · FalconChristmas/fpp · GitHub

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#############################################################################
# Automatically re-run the failed jobs of a "Build Images" run, exactly once.
#
# Why: the image build has three independent, well-understood sources of
# transient failure that are not code defects:
#
#   1. qemu-user mis-emulating concurrent atomics in the armhf chroot, which
#      SIGSEGVs a build tool. (The mold linker case self-heals in
#      src/makefiles/common/mold-wrapper/ld.mold; a segfault in cc1plus does
#      not.)
#   2. GitHub failing to allocate a hosted runner -- "The job was not acquired
#      by Runner of type hosted even after multiple attempts". This killed the
#      2026-07-09 nightly publish during a GitHub Actions incident, after all
#      four platforms had already built successfully.
#   3. Transient artifact upload/download failures.
#
# `gh run rerun --failed` re-runs ONLY the failed jobs and reuses the
# successful ones' artifacts, so recovering a dead publish job costs ~5 minutes
# instead of a ~55 minute rebuild.
#
# Loop safety: this fires on workflow_run/completed, and re-running bumps
# run_attempt. Guarding on `run_attempt < 2` means attempt 2's completion event
# fails the check, so a run is retried at most once, ever.
#
# We deliberately do NOT retry `cancelled` runs -- a human hitting cancel, or
# the concurrency group superseding an old run, should stay cancelled.
#############################################################################

name: Retry failed Build Images

on:
  workflow_run:
    workflows: ["Build Images"]
    types: [completed]

permissions:
  actions: write

jobs:
  rerun:
    if: >-
      github.repository == 'FalconChristmas/fpp' &&
      github.event.workflow_run.conclusion == 'failure' &&
      github.event.workflow_run.run_attempt < 2
    runs-on: ubuntu-latest
    steps:
      - name: Re-run failed jobs once
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          RUN_ID: ${{ github.event.workflow_run.id }}
          REPO: ${{ github.repository }}
        run: |
          set -euo pipefail
          echo "Build Images run $RUN_ID failed on attempt" \
               "${{ github.event.workflow_run.run_attempt }}; re-running failed jobs."
          gh run rerun "$RUN_ID" --repo "$REPO" --failed