name: Cosmocc

on:
  pull_request:
  push:
  release:
    types: [published]

jobs:
  check:
    runs-on: ubuntu-latest
    outputs:
      should-run: ${{ steps.check.outputs.should-run }}
    steps:
      - name: Random execution check
        id: check
        uses: actions/github-script@v7
        with:
          script: |
            const fs = require('fs');
            const outputFile = process.env.GITHUB_OUTPUT;

            // Always run for release events
            if (context.eventName === 'release') {
              fs.appendFileSync(outputFile, `should-run=true\n`);
              core.info('Release event detected. Will run tests.');
              return;
            }

            // Execution probability (default 50%, can be overridden via env)
            const probability = parseFloat(process.env.RUN_PROBABILITY || '0.5');

            // Generate deterministic "random" number based on commit SHA, run ID, and current time
            // Adding time ensures better randomness while keeping same commit/run consistent
            const timeSeed = Math.floor(Date.now() / (1000 * 60 * 60)); // Round to hour for consistency
            const seed = context.sha + context.runId + timeSeed;
            let hash = 0;
            for (let i = 0; i < seed.length; i++) {
              const char = seed.charCodeAt(i);
              hash = ((hash << 5) - hash) + char;
              hash = hash | 0; // Convert to 32-bit integer
            }
            // Normalize to 0-1 range
            const random = Math.abs(hash) / 2147483647;
            const shouldRun = random < probability;

            // Use environment file instead of deprecated set-output
            fs.appendFileSync(outputFile, `should-run=${shouldRun}\n`);
            if (shouldRun) {
              core.info(`Random check passed (${(random * 100).toFixed(2)}% < ${(probability * 100).toFixed(0)}%). Will run tests.`);
            } else {
              core.info(`Random check failed (${(random * 100).toFixed(2)}% >= ${(probability * 100).toFixed(0)}%). Skipping.`);
            }
        env:
          RUN_PROBABILITY: ${{ vars.COSMOCC_RUN_PROBABILITY || '0.5' }}

  build:
    needs: check
    if: needs.check.outputs.should-run == 'true'
    strategy:
      matrix:
        os: [ubuntu-latest, macos-15-intel]
        arch: [x86_64]

    runs-on: ${{ matrix.os }}

    concurrency:
      group: ${{ github.ref }}-${{ github.base_ref }}-${{ github.head_ref }}-Cosmocc-${{ matrix.os }}-${{ matrix.arch }}
      cancel-in-progress: true

    steps:
      - uses: actions/checkout@v2
        with:
          submodules: true

      - uses: little-core-labs/get-git-tag@v3.0.2
        id: tagName

      - name: Prepare local xmake
        run: cp -rf . ../xmake-source

      - uses: xmake-io/github-action-setup-xmake@v1
        with:
          xmake-version: local#../xmake-source

      - uses: bjia56/setup-cosmocc@main
        with:
          version: "4.0.2"

      - name: Build
        run: |
          cd core
          xmake f -p linux --cosmocc=y --embed=y -y -cvD
          xmake -v
          cd ..

      - name: Prepare (Linux)
        if: matrix.os == 'ubuntu-latest'
        run: |
          sudo apt update
          sudo apt install -y ruby ruby-dev rubygems build-essential llvm libc++-dev
          sudo apt install -y libgl1-mesa-dev libglu1-mesa-dev
          clang --version

      # In the tests, cmake tries to use make from the cosmopolitan toolchain and fails, so uninstall it
      - name: Remove cosmocc
        if: startsWith(matrix.os, 'macos')
        run: |
          INSTALL_DIR="${{runner.temp}}/cosmocc-4.0.2"
          echo "Removing cosmocc from PATH"
          echo "::remove-path::${INSTALL_DIR}/bin"
          rm -r "${INSTALL_DIR}"

      - name: Tests
        run: |
          ls -l core/build/
          cmake --version
          core/build/xmake --version
          core/build/xmake lua -v -D tests/run.lua

      - name: Artifact
        if: matrix.os == 'ubuntu-latest'
        uses: actions/upload-artifact@v4
        with:
          name: xmake-bundle.cosmocc
          path: core/build/xmake

      - name: Publish bundle binary
        if: github.event.action == 'published' && matrix.os == 'ubuntu-latest'
        uses: actions/upload-release-asset@v1.0.1
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        with:
          upload_url: ${{ github.event.release.upload_url }}
          asset_path: core/build/xmake
          asset_name: xmake-bundle-${{ steps.tagName.outputs.tag }}.cosmocc
          asset_content_type: application/zip