# This workflow builds SPIRV-Tools from main once per day and caches the
# install tree. The build- and test-workflows only restore from this cache
# (via restore-keys prefix match), so this workflow owns the freshness of
# the tools.
#
# workflow_dispatch is provided for manual refresh when a SPIRV-Tools fix
# needs to be picked up before the next scheduled run, or to bootstrap the
# cache on first deployment.
name: Prebuild SPIRV-Tools

on:
  schedule:
    - cron: 0 23 * * *
  workflow_dispatch:

env:
  SPIRV_TOOLS_INSTALL: ${{ github.workspace }}/spirv-tools-install

jobs:
  prebuild:
    name: Build and cache SPIRV-Tools main
    runs-on: ubuntu-24.04
    steps:
      - name: Get current date for SPIRV-Tools cache key
        id: date
        run: echo "date=$(date -u +%Y-%m-%d)" >> $GITHUB_OUTPUT
      - name: Check for existing cache entry
        id: spirv-tools-cache
        uses: actions/cache/restore@v5
        with:
          path: ${{ env.SPIRV_TOOLS_INSTALL }}
          key: spirv-tools-main-${{ steps.date.outputs.date }}
          lookup-only: true
      - name: Build and install SPIRV-Tools
        if: steps.spirv-tools-cache.outputs.cache-hit != 'true'
        run: |
          git clone --depth=1 https://github.com/KhronosGroup/SPIRV-Tools SPIRV-Tools
          python3 SPIRV-Tools/utils/git-sync-deps
          cmake -S SPIRV-Tools -B SPIRV-Tools/build \
            -DCMAKE_BUILD_TYPE=Release \
            -DCMAKE_INSTALL_PREFIX=${{ env.SPIRV_TOOLS_INSTALL }} \
            -DSPIRV_SKIP_TESTS=ON \
            -G "Unix Makefiles"
          make -C SPIRV-Tools/build install -j$(nproc)
      - name: Save SPIRV-Tools cache
        if: steps.spirv-tools-cache.outputs.cache-hit != 'true'
        uses: actions/cache/save@v5
        with:
          path: ${{ env.SPIRV_TOOLS_INSTALL }}
          key: spirv-tools-main-${{ steps.date.outputs.date }}