name: Seed Rust Ext Cache

# A cache entry only reaches every PR when it was written from the default branch's
# ref, and pr-test.yml has no push trigger - so a merge that moves the key leaves
# every PR compiling for itself until the next scheduled run, up to 12h later.

on:
  push:
    branches: [main]
    paths:
      - 'rust/**'
      - 'python/setup.py'
      # The key's prefix lives in this file, so a bump there also moves the key.
      - '.github/workflows/_pr-test-rust-ext-build.yml'
  workflow_dispatch:

# Only the newest merge needs to seed; earlier ones are already stale.
concurrency:
  group: seed-rust-ext-cache
  cancel-in-progress: true

# Declaring permissions at all drops everything not listed. issues: read for
# check-maintenance; actions: read for the restore job's gh cache list.
permissions:
  actions: read
  contents: read
  issues: read

jobs:
  seed:
    uses: ./.github/workflows/_pr-test-rust-ext-build.yml
    with:
      runs_on: 1-gpu-5090
    secrets: inherit