name: Native prewarm

on:
   workflow_run:
      workflows: [CI]
      types: [completed]
   workflow_dispatch:
# Prewarming must never extend the required CI workflow. Keep one warmup running
# to completion so it publishes the target snapshot; GitHub coalesces newer
# pending runs in this concurrency group.
concurrency:
   group: native-prewarm-main
   cancel-in-progress: false

permissions:
   actions: read
   contents: read

jobs:
   lookup:
      name: Look up cross-platform artifacts
      if: ${{ github.event_name == 'workflow_dispatch' || (github.event.workflow_run.conclusion == 'success' && github.event.workflow_run.head_branch == 'main') }}
      runs-on: omp-kata
      outputs:
         source-hash: ${{ steps.compute.outputs.source-hash }}
         cross-platform-run-id: ${{ steps.find.outputs.cross-platform-run-id }}
      steps:
         - uses: actions/checkout@v4
           with:
              ref: ${{ github.event.workflow_run.head_sha || github.sha }}
         - id: compute
           uses: ./.github/actions/native-source-hash
         - id: find
           uses: ./.github/actions/find-native-artifacts
           with:
              hash: ${{ steps.compute.outputs.source-hash }}

   cross_platform_kata:
      name: "Prewarm native: ${{ matrix.platform }} ${{ matrix.libc || '' }} ${{ matrix.arch }}"
      needs: [lookup]
      if: ${{ needs.lookup.outputs.cross-platform-run-id == '' }}
      strategy:
         fail-fast: false
         max-parallel: 2
         matrix:
            include:
               - { platform: linux, arch: arm64, target: aarch64-unknown-linux-gnu }
               - { platform: linux, libc: musl, arch: x64, target: x86_64-unknown-linux-musl, variant: baseline }
               - { platform: linux, libc: musl, arch: arm64, target: aarch64-unknown-linux-musl }
               - { platform: win32, arch: x64, target: x86_64-pc-windows-msvc, variant: baseline }
      runs-on: omp-kata
      steps:
         - uses: actions/checkout@v4
           with:
              ref: ${{ github.event.workflow_run.head_sha || github.sha }}
         - uses: ./.github/actions/build-native
           with:
              hash: ${{ needs.lookup.outputs.source-hash }}
              platform: ${{ matrix.platform }}
              libc: ${{ matrix.libc }}
              arch: ${{ matrix.arch }}
              variant: ${{ matrix.variant }}
              target: ${{ matrix.target }}
              skip_validation: "true"
              save_cache: "true"

   cross_platform_macos:
      name: "Prewarm native: darwin ${{ matrix.arch }}"
      needs: [lookup]
      if: ${{ needs.lookup.outputs.cross-platform-run-id == '' }}
      strategy:
         fail-fast: false
         matrix:
            include:
               - { os: macos-14, arch: x64, target: x86_64-apple-darwin, variant: baseline }
               - { os: macos-14, arch: arm64 }
      runs-on: ${{ matrix.os }}
      steps:
         - uses: actions/checkout@v4
           with:
              ref: ${{ github.event.workflow_run.head_sha || github.sha }}
         - uses: ./.github/actions/build-native
           with:
              hash: ${{ needs.lookup.outputs.source-hash }}
              platform: darwin
              arch: ${{ matrix.arch }}
              variant: ${{ matrix.variant }}
              target: ${{ matrix.target }}
              skip_validation: "true"
              save_cache: "true"