name: CI
on:
  push:
    branches:
      - 'master'
    tags:
      - '*'
  pull_request:
    branches:
      - master
  schedule:
    - cron: '0 7 * * *'  # 8AM CET/11PM PT

jobs:
  set-nightly:
    # don't schedule nightlies on forks
    if: github.event_name == 'schedule' && github.repository == 'leanprover/lean4'
    runs-on: ubuntu-latest
    outputs:
      nightly: ${{ steps.set.outputs.nightly }}
    steps:
      - name: Checkout
        uses: actions/checkout@v2
      - name: Set Nightly
        id: set
        run: |
          if [[ -n '${{ secrets.PUSH_NIGHTLY_TOKEN }}' ]]; then
            git remote add nightly https://foo:'${{ secrets.PUSH_NIGHTLY_TOKEN }}'@github.com/${{ github.repository_owner }}/lean4-nightly.git
            git fetch nightly --tags
            LEAN_VERSION_STRING="nightly-$(date -u +%F)"
            # do nothing if commit already has a different tag
            if [[ $(git name-rev --name-only --tags --no-undefined HEAD 2> /dev/null || echo $LEAN_VERSION_STRING) == $LEAN_VERSION_STRING ]]; then
              echo "::set-output name=nightly::$LEAN_VERSION_STRING"
            fi
          fi

  build:
    needs: set-nightly
    if: always()
    runs-on: ${{ matrix.os }}
    defaults:
      run:
        shell: ${{ matrix.shell || 'nix-shell --run "bash -euxo pipefail {0}"' }}
    strategy:
      matrix:
        include:
          # portable release build: use channel with older glibc (2.27)
          - name: Linux release
            os: ubuntu-latest
            release: true
            shell: nix-shell --arg pkgsDist "import (fetchTarball \"channel:nixos-19.03\") {{}}" --run "bash -euxo pipefail {0}"
            llvm-url: https://github.com/leanprover/lean-llvm/releases/download/14.0.0/lean-llvm-x86_64-linux-gnu.tar.zst
            prepare-llvm: ../script/prepare-llvm-linux.sh lean-llvm*
            binary-check: ldd -v
          - name: Linux
            os: ubuntu-latest
            check-stage3: true
            test-speedcenter: true
          - name: Linux Debug
            os: ubuntu-latest
            CMAKE_OPTIONS: -DCMAKE_BUILD_TYPE=Debug
          - name: Linux fsanitize
            os: ubuntu-latest
            # turn off custom allocator & symbolic functions to make LSAN do its magic
            CMAKE_OPTIONS: -DLEAN_EXTRA_CXX_FLAGS=-fsanitize=address,undefined -DLEANC_EXTRA_FLAGS='-fsanitize=address,undefined -fsanitize-link-c++-runtime' -DSMALL_ALLOCATOR=OFF -DBSYMBOLIC=OFF
            # exclude problematic tests
            CTEST_OPTIONS: -E laketest
          - name: macOS
            os: macos-latest
            release: true
            shell: bash -euxo pipefail {0}
            CMAKE_OPTIONS: -DCMAKE_OSX_DEPLOYMENT_TARGET=10.15
            llvm-url: https://github.com/leanprover/lean-llvm/releases/download/14.0.0/lean-llvm-x86_64-apple-darwin.tar.zst
            prepare-llvm: ../script/prepare-llvm-macos.sh lean-llvm*
            binary-check: otool -L
          - name: Windows
            os: windows-2022
            release: true
            shell: msys2 {0}
            CMAKE_OPTIONS: -G "Unix Makefiles"
            # for reasons unknown, interactivetests are flaky on Windows
            CTEST_OPTIONS: --repeat until-pass:2
            llvm-url: https://github.com/leanprover/lean-llvm/releases/download/14.0.0/lean-llvm-x86_64-w64-windows-gnu.tar.zst
            prepare-llvm: ../script/prepare-llvm-mingw.sh lean-llvm*
            binary-check: ldd
          - name: Linux aarch64
            os: ubuntu-latest
            CMAKE_OPTIONS: -DCMAKE_PREFIX_PATH=$GMP
            release: true
            cross: true
            shell: nix-shell --arg pkgsDist "import (fetchTarball \"channel:nixos-19.03\") {{ localSystem.config = \"aarch64-unknown-linux-gnu\"; }}" --run "bash -euxo pipefail {0}"
            llvm-url: https://github.com/leanprover/lean-llvm/releases/download/14.0.0/lean-llvm-x86_64-linux-gnu.tar.zst https://github.com/leanprover/lean-llvm/releases/download/14.0.0/lean-llvm-aarch64-linux-gnu.tar.zst
            prepare-llvm: EXTRA_FLAGS=--target=aarch64-unknown-linux-gnu ../script/prepare-llvm-linux.sh lean-llvm-aarch64-* lean-llvm-x86_64-*
      # complete all jobs
      fail-fast: false
    name: ${{ matrix.name }}
    env:
      # must be inside workspace
      CCACHE_DIR: ${{ github.workspace }}/.ccache
      CCACHE_COMPRESS: true
      # current cache limit
      CCACHE_MAXSIZE: 200M
      # squelch error message about missing nixpkgs channel
      NIX_BUILD_SHELL: bash
      LSAN_OPTIONS: max_leaks=10
      # somehow MinGW clang64 (or cmake?) defaults to `g++` even though it doesn't exist
      CXX: c++
    steps:
      - name: Checkout
        uses: actions/checkout@v2
        with:
          submodules: true
      - name: Install Nix
        uses: cachix/install-nix-action@v15
        if: matrix.os == 'ubuntu-latest'
      - name: Install MSYS2
        uses: msys2/setup-msys2@v2
        with:
          msystem: clang64
          install: make python mingw-w64-clang-x86_64-cmake mingw-w64-clang-x86_64-clang mingw-w64-clang-x86_64-ccache git zip unzip diffutils binutils tree mingw-w64-clang-x86_64-zstd tar
        if: matrix.os == 'windows-2022'
      - name: Install Brew Packages
        run: |
          brew install ccache tree zstd coreutils
        if: matrix.os == 'macos-latest'
      - name: Cache
        uses: actions/cache@v2
        with:
          path: .ccache
          key: ${{ matrix.name }}-build-${{ github.sha }}
          # fall back to (latest) previous cache
          restore-keys: |
            ${{ matrix.name }}-build
      - name: Setup
        run: |
          # open nix-shell once for initial setup
          true
        if: matrix.os == 'ubuntu-latest'
      - name: Build
        run: |
          mkdir build
          cd build
          OPTIONS=()
          [[ -z '${{ matrix.llvm-url }}' ]] || wget -q ${{ matrix.llvm-url }}
          [[ -z '${{ matrix.prepare-llvm }}' ]] || eval "OPTIONS+=($(${{ matrix.prepare-llvm }}))"
          if [[ -n '${{ matrix.release }}' && -n '${{ needs.set-nightly.outputs.nightly }}' ]]; then
            OPTIONS+=(-DLEAN_SPECIAL_VERSION_DESC=${{ needs.set-nightly.outputs.nightly }})
          fi
          # contortion to support empty OPTIONS with old macOS bash
          cmake .. ${{ matrix.CMAKE_OPTIONS }} ${OPTIONS[@]+"${OPTIONS[@]}"} -DLEAN_INSTALL_PREFIX=$PWD/..
          make -j4
          make install
      - name: Check Binaries
        run: ${{ matrix.binary-check }} lean-*/bin/* || true
      - name: List Install Tree
        run: |
          # omit contents of Init/, ...
          tree --du -h lean-* | grep -E ' (Init|Std|Lean|Lake|LICENSE|[a-z])'
      - name: Pack
        run: |
          dir=$(echo lean-*)
          mkdir pack
          # high-compression tar.zst + zip for release, fast tar.zst otherwise
          if [[ '${{ startsWith(github.ref, 'refs/tags/v') && matrix.release }}' == true || -n '${{ needs.set-nightly.outputs.nightly }}' ]]; then
            tar cf - $dir | zstd -T0 --no-progress -19 -o pack/$dir.tar.zst
            zip -rq pack/$dir.zip $dir
          else
            tar cf - $dir | zstd -T0 --no-progress -o pack/$dir.tar.zst
          fi
      - uses: actions/upload-artifact@v2
        if: matrix.release
        with:
          name: build-${{ matrix.name }}
          path: pack/*
      - name: Lean stats
        run: |
          build/stage1/bin/lean --stats src/Lean.lean
        if: ${{ !matrix.cross }}
      - name: Test
        run: |
          cd build/stage1
          ctest -j4 --output-on-failure ${{ matrix.CTEST_OPTIONS }} < /dev/null
        if: ${{ !matrix.cross }}
      - name: Check Test Binary
        run: ${{ matrix.binary-check }} tests/compiler/534.lean.out
        if: ${{ !matrix.cross }}
      - name: Build Stage 2
        run: |
          cd build
          make -j4 stage2
        if: matrix.build-stage2 || matrix.check-stage3
      - name: Check Stage 3
        run: |
          cd build
          make -j4 check-stage3
        if: matrix.check-stage3
      - name: Test Speedcenter Benchmarks
        run: |
          echo -1 | sudo tee /proc/sys/kernel/perf_event_paranoid
          export BUILD=$PWD/build PATH=$PWD/build/stage1/bin:$PATH
          nix-shell -A with-temci --run "cd tests/bench; temci exec --config speedcenter.yaml --included_blocks fast --runs 1"
        if: matrix.test-speedcenter
      - name: Check rebootstrap
        run: |
          cd build
          make update-stage0 && make -j4
        if: matrix.name == 'Linux'
      - name: CCache stats
        run: ccache -s

  release:
    # When GitHub says "If a job fails, all jobs that need it are skipped unless
    # the jobs use a conditional expression that causes the job to continue.", don't believe
    # their lies. It's actually the entire closure (i.e. including `set-nightly`) that
    # must succeed for subsequent to be run without `always()`.
    if: always() && needs.build.result == 'success' && startsWith(github.ref, 'refs/tags/v')
    runs-on: ubuntu-latest
    needs: build
    steps:
      - uses: actions/download-artifact@v2
        with:
          path: artifacts
      - name: Release
        uses: softprops/action-gh-release@v1       
        with:
          files: artifacts/*/*
          fail_on_unmatched_files: true
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          
  release-nightly:
    needs: [set-nightly, build]
    if: needs.set-nightly.outputs.nightly
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v2
        with:
          # needed for tagging
          fetch-depth: 0
          token: ${{ secrets.PUSH_NIGHTLY_TOKEN }}
      - uses: actions/download-artifact@v2
        with:
          path: artifacts
      - name: Prepare Nightly Release
        run: |
          git remote add nightly https://foo:'${{ secrets.PUSH_NIGHTLY_TOKEN }}'@github.com/${{ github.repository_owner }}/lean4-nightly.git
          git fetch nightly --tags
          git tag ${{ needs.set-nightly.outputs.nightly }}
          git push nightly ${{ needs.set-nightly.outputs.nightly }}
          last_tag=$(git describe HEAD^ --abbrev=0 --tags)
          echo -e "*Changes since ${last_tag}:*\n\n" > diff.md
          git show $last_tag:RELEASES.md > old.md
          #./script/diff_changelogs.py old.md doc/changes.md >> diff.md
          diff --changed-group-format='%>' --unchanged-group-format='' old.md RELEASES.md >> diff.md || true
          echo -e "\n*Full commit log*\n" >> diff.md
          git log --oneline $last_tag..HEAD | sed 's/^/* /' >> diff.md
      - name: Release Nightly
        uses: softprops/action-gh-release@v1
        with:
          body_path: diff.md
          prerelease: true
          files: artifacts/*/*
          fail_on_unmatched_files: true
          tag_name: ${{ needs.set-nightly.outputs.nightly }}
          repository: ${{ github.repository_owner }}/lean4-nightly
        env:
          GITHUB_TOKEN: ${{ secrets.PUSH_NIGHTLY_TOKEN }}