name: build

env:
  COSMOCC_VERSION: 3.9.2

on:
  push:
    branches:
      - "master"
      - "flake"
  pull_request:
    branches:
      - "master"

  # run workflow manually from the Actions tab
  workflow_dispatch:

jobs:
  matrix_on_mode:
    runs-on: ubuntu-latest
    strategy:
      matrix:
        mode: ["", tiny, rel, tinylinux, optlinux]
    steps:
      - uses: actions/checkout@v4
        with:
          # Full checkout needed for git-restore-mtime-bare.
          fetch-depth: 0

      # TODO(jart): fork this action.
      - uses: chetan/git-restore-mtime-action@v2

      - uses: actions/cache/restore@v4
        id: cache
        with:
          path: |
            .cosmocc
            o
          key: ${{ env.COSMOCC_VERSION }}-${{ matrix.mode }}-${{ github.sha }}
          restore-keys: |
            ${{ env.COSMOCC_VERSION }}-${{ matrix.mode }}-
            ${{ env.COSMOCC_VERSION }}-

      - name: Restore mtimes
        if: steps.cache.outputs.cache-hit == 'true'
        run: |
          while read mtime file; do
            [ -f "$file" ] && touch -d "@$mtime" "$file"
          done < o/.mtimes

      - name: support ape bins 1
        run: sudo cp -a build/bootstrap/ape.elf /usr/bin/ape

      - name: support ape bins 2
        run: sudo sh -c "echo ':APE:M::MZqFpD::/usr/bin/ape:' >/proc/sys/fs/binfmt_misc/register"

      - name: make matrix
        run: V=0 make -j2 MODE=${{ matrix.mode }}

      - name: Save mtimes
        run: |
          find o -type f -exec stat -c "%Y %n" {} \; > o/.mtimes

      - uses: actions/cache/save@v4
        with:
          path: |
            .cosmocc
            o
          key: ${{ env.COSMOCC_VERSION }}-${{ matrix.mode }}-${{ github.sha }}