name: CI
on:
  push:
    branches:
      - master
    tags:
      - '*'
  pull_request:
    branches:
      - master
  schedule:
    - cron: '0 0 * * *'

jobs:
  Build:
    # don't schedule nightlies on forks
    if: github.event_name != 'schedule' || github.repository == 'leanprover/lean4'
    runs-on: ${{ matrix.os }}
    defaults:
      run:
        shell: ${{ matrix.shell || 'nix-shell --run "bash -euxo pipefail {0}"' }}
    strategy:
      matrix:
        include:
          # portable release build: link most libraries statically and use channel with older glibc (2.27; LLVM 7)
          - name: Linux release
            os: ubuntu-latest
            release: true
            CMAKE_OPTIONS: -DSTATIC=ON
            shell: nix-shell --arg pkgs "import (fetchTarball \"channel:nixos-19.03\") {{}}" --argstr llvmPackages latest --run "bash -euxo pipefail {0}"
          - 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 to make LSAN do its magic
            CMAKE_OPTIONS: -DLEAN_EXTRA_CXX_FLAGS=-fsanitize=address,undefined -DLEANC_EXTRA_FLAGS=-fsanitize=address,undefined -DSMALL_ALLOCATOR=OFF
          - name: macOS
            os: macos-latest
            release: true
            CMAKE_OPTIONS: -DSTATIC=ON
          - name: Windows
            os: windows-latest
            release: true
            shell: msys2 {0}
            CMAKE_OPTIONS: -G "Unix Makefiles" -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++ -DSTATIC=ON
      # 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
    steps:
      - name: Checkout
        uses: actions/checkout@v2
        with:
          # interferes with lean4-nightly authentication
          persist-credentials: false
      - name: Install Nix
        uses: cachix/install-nix-action@v12
        with:
          # used only for providing a more recent `bash` on macOS
          nix_path: nixpkgs=channel:nixos-unstable
        if: matrix.os != 'windows-latest'
      - name: Install MSYS2
        uses: msys2/setup-msys2@v2
        with:
          install: make python mingw-w64-x86_64-cmake mingw-w64-x86_64-clang mingw-w64-x86_64-ccache git diffutils
        if: matrix.os == 'windows-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 != 'windows-latest'
      # remove problematic tests for sanitized build
      - name: Pre build
        run: rm tests/compiler/StackOverflow.lean tests/compiler/StackOverflowTask.lean
        if: matrix.name == 'Linux fsanitize'
      - name: Build
        run: |
          mkdir build
          cd build
          OPTIONS=
          if [[ $GITHUB_EVENT_NAME == 'schedule' && -n '${{ matrix.release }}' && -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) == $LEAN_VERSION_STRING ]]; then
              OPTIONS=-DLEAN_SPECIAL_VERSION_DESC=$LEAN_VERSION_STRING
              echo "LEAN_VERSION_STRING=$LEAN_VERSION_STRING" >> $GITHUB_ENV
            fi
          fi
          cmake .. ${{ matrix.CMAKE_OPTIONS }} $OPTIONS
          make -j4
      # de-Nix-ify binaries
      - name: Patch
        run: |
          for f in lean leanpkg; do
            patchelf --set-interpreter /lib64/ld-linux-x86-64.so.2 --remove-rpath build/stage1/bin/$f
          done
        if: matrix.name == 'Linux release'
      - name: Patch
        run: |
          for f in lean leanpkg; do
            for lib in $(otool -L build/stage1/bin/$f | tail -n +2 | cut -d' ' -f1); do
              install_name_tool -change "$lib" "/usr/lib/$(basename $lib | sed 's/libc++\.1\.0/libc++.1/')" build/stage1/bin/$f
            done
          done
        if: matrix.name == 'macOS'
      - name: Pack
        run: cd build/stage1; cpack
      - uses: actions/upload-artifact@v2
        with:
          name: build-${{ matrix.name }}
          path: build/stage1/lean-*
      - name: Test
        run: |
          cd build/stage1
          ctest -j4 --output-on-failure < /dev/null
      - name: Build Stage 2
        run: |
          cd build
          make -j4 stage2
        if: matrix.build-stage2 || matrix.check-stage3
      - name: Check Stage 3
        run: |
          cd build
          make -j4 check-stage3
        if: matrix.check-stage3
      - name: Test Speedcenter Benchmarks
        run: |
          echo -1 | sudo tee /proc/sys/kernel/perf_event_paranoid
          export BUILD=$PWD/build PATH=$PWD/build/stage1/bin:$PATH
          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
      - name: Release
        uses: softprops/action-gh-release@v1
        if: ${{ startsWith(github.ref, 'refs/tags/v') && matrix.release }}
        with:
          files: build/stage1/lean-*
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
      - name: Prepare Nightly Release
        if: env.LEAN_VERSION_STRING
        run: |
          # can't push shallow checkout
          git fetch --unshallow
          git fetch nightly --tags
          if git tag $LEAN_VERSION_STRING && git push nightly $LEAN_VERSION_STRING; then
            last_tag=$(git describe HEAD^ --abbrev=0 --tags)
            echo -e "Changes since ${last_tag}:\n\n" > diff.md
            #git show $last_tag:doc/changes.md > old.md
            #./script/diff_changelogs.py old.md doc/changes.md >> diff.md
            echo -e "*Full commit log*\n" >> diff.md
            git log --oneline $last_tag..HEAD | sed 's/^/* /' >> diff.md
          else
            # make sure every runner is building the same commit
            [ $(git rev-parse HEAD) == $(git rev-parse $LEAN_VERSION_STRING) ] || exit 11
            echo -n > diff.md
          fi
      - name: Release Nightly
        # need unreleased version for fixed `repository`
        uses: Kha/action-gh-release@master
        if: env.LEAN_VERSION_STRING
        with:
          body_path: diff.md
          prerelease: true
          files: build/stage1/lean-*
          tag_name: ${{ env.LEAN_VERSION_STRING }}
          repository: ${{ github.repository_owner }}/lean4-nightly
        env:
          GITHUB_TOKEN: ${{ secrets.PUSH_NIGHTLY_TOKEN }}