name: Build

on:
  push:
    branches:
      - '4.**'
      - '5.**'
      - 'trunk'
  pull_request:

# Restrict the GITHUB_TOKEN
permissions: {}

env:
  # List of test directories for the debug-s4096 and linux-O0 jobs. These
  # directories are selected because of their tendencies to reach corner cases
  # in the runtime system.
  PARALLEL_TESTS: parallel callback gc-roots weak-ephe-final
  # Fully print commands executed by Make
  # MAKEFLAGS: V=1

# https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#concurrency
# Concurrent workflows are grouped by the PR or branch that triggered them
# (github.ref) and the name of the workflow (github.workflow). The
# 'cancel-in-progress' option then make sure that only one workflow is running
# at a time. This doesn't prevent new jobs from running, rather it cancels
# already running jobs before scheduling new jobs.
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}-${{ github.event_name == 'pull_request' || github.sha }}
  cancel-in-progress: true

jobs:
# This job will do the initial build of the compiler (on linux), with flambda on.
# We then upload the compiler tree as a build artifact to enable re-use in
# subsequent jobs.
  build:
    runs-on: ubuntu-latest
    outputs:
      manual_changed: ${{ steps.manual.outputs.manual_changed }}
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          persist-credentials: false
      - name: Check for manual changes
        id: manual
        run: >-
         tools/ci/actions/check-manual-modified.sh
         '${{ github.ref }}'
         '${{ github.event_name }}'
         '${{ github.event.pull_request.base.ref }}'
         '${{ github.event.pull_request.base.sha }}'
         '${{ github.event.pull_request.head.ref }}'
         '${{ github.event.pull_request.head.sha }}'
         '${{ github.event.ref }}'
         '${{ github.event.before }}'
         '${{ github.event.ref }}'
         '${{ github.event.after }}'
         '${{ github.event.repository.full_name }}'
      - name: Configure tree
        run: |
          MAKE_ARG=-j CONFIG_ARG='--enable-flambda --enable-cmm-invariants --enable-codegen-invariants --enable-dependency-generation --enable-native-toplevel' OCAMLRUNPARAM=b,v=0 bash -xe tools/ci/actions/runner.sh configure
      - name: Build
        run: |
          MAKE_ARG=-j bash -xe tools/ci/actions/runner.sh build
      - name: Prepare Artifact
        run: tar --zstd -cf /tmp/sources.tar.zstd .
      - name: Upload Artifact
        uses: actions/upload-artifact@v4
        with:
          name: compiler
          path: /tmp/sources.tar.zstd
          retention-days: 1

# Full testsuite run, and other sanity checks
# "extra" testsuite runs, reusing the previously built compiler tree.
# debug: running the full testsuite with the
#        debug runtime and minor heap verification.
# debug-s4096: select testsuite run with the debug runtime and a small
#              minor heap.
  normal:
    name: ${{ matrix.name }}
    needs: [build, config]
    runs-on: ubuntu-latest
    strategy:
      matrix:
        include:
          - id: normal
            name: normal
            dependencies: texlive-latex-extra texlive-fonts-recommended texlive-luatex hevea sass gdb lldb
          - id: debug
            name: extra (debug)
          - id: debug-s4096
            name: extra (debug-s4096)
    steps:
      - name: Download Artifact
        uses: actions/download-artifact@v4
        with:
          name: compiler
      - name: Unpack Artifact
        run: |
          tar --zstd -xf sources.tar.zstd
          rm -f sources.tar.zstd
      - name: Packages
        if: matrix.dependencies != ''
        run: |
          sudo apt-get update -y
          sudo apt-get install -y ${{ matrix.dependencies }}
      - name: Run the testsuite
        if: ${{ matrix.id == 'normal' && needs.config.outputs.skip-testsuite != 'true' }}
        run: |
          MAKE_ARG=-j OCAMLRUNPARAM=b,v=0 bash -xe tools/ci/actions/runner.sh test
      - name: Run the testsuite (debug runtime)
        if: ${{ matrix.id == 'debug' && needs.config.outputs.skip-testsuite != 'true' }}
        env:
          OCAMLRUNPARAM: v=0,V=1
          USE_RUNTIME: d
        run: |
          bash -cxe "SHOW_TIMINGS=1 tools/ci/actions/runner.sh test"
      - name: Run the testsuite (s=4096, debug runtime)
        if: ${{ matrix.id == 'debug-s4096' && needs.config.outputs.skip-testsuite != 'true' }}
        env:
          OCAMLRUNPARAM: s=4096,v=0
          USE_RUNTIME: d
        run: |
          for dir in $PARALLEL_TESTS; do \
            bash -cxe "SHOW_TIMINGS=1 tools/ci/actions/runner.sh test_prefix $dir"; \
          done
      - name: Build API Documentation
        if: matrix.id == 'normal'
        run: |
          MAKE_ARG=-j OCAMLRUNPARAM=b,v=0 bash -xe tools/ci/actions/runner.sh api-docs
      - name: Install
        if: matrix.id == 'normal'
        run: |
         MAKE_ARG=-j OCAMLRUNPARAM=b,v=0 bash -xe tools/ci/actions/runner.sh install
      - name: Test in prefix
        if: matrix.id == 'normal'
        run: |
         MAKE_ARG=-j OCAMLRUNPARAM=b,v=0 bash -xe tools/ci/actions/runner.sh test-in-prefix
      - name: Build the manual
        if: matrix.id == 'normal' && needs.build.outputs.manual_changed == 'true'
        run: |
          MAKE_ARG=-j OCAMLRUNPARAM=b,v=0 bash -xe tools/ci/actions/runner.sh manual
      - name: Other checks
        if: matrix.id == 'normal'
        run: |
          MAKE_ARG=-j OCAMLRUNPARAM=b,v=0 bash -xe tools/ci/actions/runner.sh other-checks

# macOS build+testsuite run, and other Linux configurations (-O0, etc.)
  config:
    runs-on: ubuntu-latest
    outputs:
      jobs: ${{ steps.jobs.outputs.result }}
      skip-testsuite: ${{ steps.skip.outputs.result }}
    steps:
      - name: Compute matrix for the "others" job
        id: jobs
        uses: actions/github-script@v7
        with:
          script: |
            // # Default jobs: Linux -O0, Linux arm64 & macOS
            let jobs = [
              {name: 'linux-O0', os: 'ubuntu-latest',
               config_arg: "CFLAGS='-O0'"},
              {name: 'linux-arm64', os: 'ubuntu-24.04-arm',
               'test-in-prefix': true},
              {name: 'macos-x86_64', os: 'macos-13',
               'test-in-prefix': true},
              {name: 'macos-arm64', os: 'macos-15',
               'test-in-prefix': true}];
            // # If this is a pull request, see if the PR has the
            // # 'CI: Full matrix' label. This is done using an API request,
            // # rather than from context.payload.pull_request.labels, since we
            // # want the _current_ list of labels. This allows the labelling to
            // # be changed, and then forcing a re-run of the workflow, rather
            // # than having labelling triggering a fresh workflow event (which
            // # is wasteful).
            if (context.payload.pull_request) {
              const { data: labels } =
                await github.rest.issues.listLabelsOnIssue({...context.repo, issue_number: context.payload.pull_request.number});
              if (labels.some(label => label.name === 'CI: Full matrix')) {
                console.log('Full matrix requested');
                // # Add "static" and "minimal" jobs
                jobs = jobs.concat([
                  {name: 'static', os: 'ubuntu-latest',
                   config_arg: '--disable-native-toplevel --disable-shared',
                   'test-in-prefix': true},
                  {name: 'minimal', os: 'ubuntu-latest',
                   config_arg: '--disable-native-toplevel --disable-native-compiler --disable-shared --disable-debug-runtime --disable-instrumented-runtime --disable-systhreads --disable-str-lib --disable-unix-lib --disable-ocamldoc'}]);
              }
            }
            return jobs;
      - name: Determine if the testsuite should be skipped
        id: skip
        uses: actions/github-script@v7
        with:
          script: |
            let skip_testsuite = false;
            if (context.payload.pull_request) {
              const { data: labels } =
                await github.rest.issues.listLabelsOnIssue({...context.repo, issue_number: context.payload.pull_request.number});
              skip_testsuite = labels.some(label => label.name === 'CI: Skip testsuite');
            }
            console.log('Skip testsuite: ' + skip_testsuite);
            return skip_testsuite;

  others:
    name: ${{ matrix.name }}
    needs: config
    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
        include: ${{ fromJSON(needs.config.outputs.jobs) }}
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          persist-credentials: false
      - name: macOS Dependencies
        if: startsWith(matrix.os, 'macos-')
        run: |
          brew install parallel
          # Allows starting up lldb from a remote terminal
          #   Note: in order to start lldb, the user must also be in
          #   one of these groups: "admin" or "_developer".
          sudo DevToolsSecurity --enable
          spctl developer-mode enable-terminal
          # Select latest supported version
          sudo xcode-select -s /Applications/Xcode_${{ matrix.os == 'macos-13' && '15.2' || '16.3' }}.app/Contents/Developer
          lldb --version
      - name: configure tree
        run: |
          CONFIG_ARG='--enable-codegen-invariants ${{ matrix.config_arg }}' MAKE_ARG=-j bash -xe tools/ci/actions/runner.sh configure
      - name: Build
        run: |
          MAKE_ARG=-j bash -xe tools/ci/actions/runner.sh build
      - name: Run the testsuite
        if: ${{ matrix.name != 'linux-O0' && needs.config.outputs.skip-testsuite != 'true' }}
        run: |
          bash -c 'SHOW_TIMINGS=1 tools/ci/actions/runner.sh test'
      - name: Run the testsuite (linux-O0)
        if: ${{ matrix.name == 'linux-O0' && needs.config.outputs.skip-testsuite != 'true' }}
        env:
          OCAMLRUNPARAM: v=0,V=1
          USE_RUNTIME: d
        run: |
          for dir in $PARALLEL_TESTS; do \
           bash -cxe "SHOW_TIMINGS=1 tools/ci/actions/runner.sh test_prefix $dir"; \
          done
      - name: Install
        if: ${{ matrix.test-in-prefix }}
        run: |
          MAKE_ARG=-j OCAMLRUNPARAM=b,v=0 bash -xe tools/ci/actions/runner.sh install
      - name: Test in prefix
        if: ${{ matrix.test-in-prefix }}
        run: |
          MAKE_ARG=-j OCAMLRUNPARAM=b,v=0 bash -xe tools/ci/actions/runner.sh test-in-prefix

  i386:
    runs-on: ubuntu-latest
    needs: config
    container:
      image: debian:12
      options: --platform linux/i386 --user root
    steps:
      - name: OS Dependencies
        run: |
          apt-get update -y
          apt-get install -y git gcc make parallel
          adduser --disabled-password --gecos '' ocaml
      - name: Checkout
        # See https://github.com/actions/checkout/issues/334
        uses: actions/checkout@v1
      - name: configure tree
        run: |
          chown -R ocaml:ocaml .
          MAKE_ARG=-j CONFIG_ARG='--disable-native-toplevel' su ocaml -c "bash -xe tools/ci/actions/runner.sh configure"
      - name: Build
        run: |
          MAKE_ARG=-j su ocaml -c "bash -xe tools/ci/actions/runner.sh build"
      - name: Run the testsuite
        if: ${{ needs.config.outputs.skip-testsuite != 'true' }}
        run: |
          su ocaml -c "bash -xe tools/ci/actions/runner.sh test"
      - name: Install
        run: |
          su ocaml -c "bash -xe tools/ci/actions/runner.sh install"
      - name: Test in prefix
        run: |
          su ocaml -c "bash -xe tools/ci/actions/runner.sh test-in-prefix"