# Workflow to build binaries and release them.
# Triggered by the schedule or manual dispatch, which might include
# `<owner/llvm-project>@<full-sha>`.
#
# Because the build takes more than an hour, our GITHUB_TOKEN credentials may
# expire. A token `secrets.RELEASE_TOKEN` must exist with public_repo scope.
name: Build release binaries
on:
  # Run weekly on sunday at 21:37 UTC (arbitrary)
  schedule:
  - cron: '37 21 * * SUN'
  workflow_dispatch:
    inputs:
      commit:
        description: 'Commit to build from'
        required: true
      repo:
        description: 'Repository to build from'
        required: true
        default: 'llvm/llvm-project'
      release_name:
        description: 'Release name'
        required: true
      tag:
        description: 'Tag name'
        required: true
      description:
        description: 'Release description'
        required: true
jobs:
  schedule_environment:
    name: Create default build environment
    runs-on: ubuntu-latest
    if: ${{ github.event_name == 'schedule' }}
    steps:
    - name: Install deps
      run: |
        sudo apt-get install jq
    - name: Clone scripts
      uses: actions/checkout@v2
    # Choose the commit to build a release from.
    #
    # We want to avoid unbuildable revisions: choose the last green from CI.
    # FIXME: The criteria should be some consistent set of buildbots passing.
    # Use clangd/actions/pick after
    # https://github.com/ramasilveyra/last-successful-gh-commit/issues/2 has
    # been addressed.
    - name: Get commit hash for LLVM head
      run: >
        COMMIT=$(curl --fail --show-error
        "https://api.github.com/repos/llvm/llvm-project/commits/main" |
        jq ".sha" -r)

        echo "LLVM_COMMIT=$COMMIT" >> $GITHUB_ENV
    - name: Compute release info
      run: |
        echo "RELEASE_COMMIT_SHORT=$(printf '%.12s' ${{ env.LLVM_COMMIT }})" >> $GITHUB_ENV
        echo "RELEASE_DATE=$(date -u +%Y%m%d)" >> $GITHUB_ENV
        echo "LLVM_REPO=llvm/llvm-project" >> commit.env
        echo "LLVM_COMMIT=${{ env.LLVM_COMMIT }}" >> commit.env
    - name: Use date as the tag name
      run: >
        echo "TAG_NAME=snapshot_${{ env.RELEASE_DATE }}" >> commit.env
    - name: Use date and release commit as release name
      run: >
        echo "RELEASE_NAME=${{ env.RELEASE_DATE }} @${{ env.RELEASE_COMMIT_SHORT }}" >> commit.env
    - name: Generate default release description
      run: >
        echo "RELEASE_DESCRIPTION=Unstable snapshot of clangd on ${{ env.RELEASE_DATE }}." >> commit.env
    - name: Upload result
      uses: actions/upload-artifact@v2
      with:
        name: env
        path: commit.env
  workflow_dispatch_environment:
    name: Use inputs to create build environment
    runs-on: ubuntu-latest
    if: ${{ github.event_name == 'workflow_dispatch' }}
    steps:
    - name: Use repo and commit from the inputs
      run: |
        echo "LLVM_REPO=${{ github.event.inputs.repo }}" >> commit.env
        echo "LLVM_COMMIT=${{ github.event.inputs.commit }}" >> commit.env
        echo "TAG_NAME=${{ github.event.inputs.tag }}" >> commit.env
        echo "RELEASE_NAME=${{ github.event.inputs.release_name }}" >> commit.env
        echo "RELEASE_DESCRIPTION=${{ github.event.inputs.description }}" >> commit.env
    - name: Upload result
      uses: actions/upload-artifact@v2
      with:
        name: env
        path: commit.env
  create_release:
    name: Create release
    runs-on: ubuntu-latest
    needs: [schedule_environment, workflow_dispatch_environment]
    # Use always() and manually check results here since GitHub Actions do not
    # support conditionally skipping jobs and there is no way to "exit with
    # success" from a job.
    if: always() && (needs.schedule_environment.result == 'success' || needs.workflow_dispatch_environment.result == 'success')
    steps:
    - name: Fetch environment variables
      uses: actions/download-artifact@v1
      with:
        name:
          env
    - name: Set environment variables
      run: |
        cat env/commit.env >> $GITHUB_ENV
    - name: Create release
      uses: actions/create-release@master
      id: create_release
      env:
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
      with:
        tag_name: ${{ env.TAG_NAME }}
        release_name: ${{ env.RELEASE_NAME }}
        body: |
          ${{ env.RELEASE_DESCRIPTION }}

          Built from ${{ env.LLVM_REPO }}@${{ env.LLVM_COMMIT }}.
        prerelease: true
        draft: true
    - name: Preserve release info
      run: |
        echo "UPLOAD_URL=${{ steps.create_release.outputs.upload_url }}" >> release.env
        echo "TAG_NAME=${{ env.TAG_NAME }}" >> release.env
        echo "RELEASE_ID=${{ steps.create_release.outputs.id }}" >> release.env
    - name: Upload result
      uses: actions/upload-artifact@v2
      with:
        name: release
        path: release.env
  # Build clangd using CMake/Ninja.
  #
  # This step is a template that runs on each OS, build config varies slightly.
  # Uploading releases needs a per-job token that expires after an hour.
  build:
    name: Build ${{ matrix.config.name }}
    needs: create_release
    if: always() && needs.create_release.result == 'success'
    runs-on: ${{ matrix.config.os }}
    strategy:
      fail-fast: false
      matrix:
        config:
        - name: windows
          os: windows-latest
          preinstall: choco install ninja nasm
          vcvars: C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\VC\Auxiliary\Build\vcvars64.bat
          cflags: /O2 /DNDEBUG
          cmake: >-
            "-DCMAKE_C_COMPILER=cl"
            "-DCMAKE_CXX_COMPILER=cl"
            "-DLLVM_ENABLE_ZLIB=OFF"
            "-DLLVM_USE_CRT_RELEASE=MT"
          grpc_cmake: >-
            "-DgRPC_MSVC_STATIC_RUNTIME=ON"
          binary_extension: ".exe"
        - name: mac
          os: macos-latest
          preinstall: brew install ninja zlib p7zip
          cflags: -O3 -gline-tables-only -DNDEBUG
          env: MACOSX_DEPLOYMENT_TARGET=10.9
          cmake: >-
            "-DCMAKE_C_COMPILER=clang"
            "-DCMAKE_CXX_COMPILER=clang++"
            "-DLLVM_ENABLE_ZLIB=FORCE_ON"
            "-DCMAKE_OSX_ARCHITECTURES=x86_64;arm64"
          # BoringSSL doesn't support universal binaries when building with ASM.
          grpc_cmake: >-
            "-DOPENSSL_NO_ASM=ON"
        - name: linux
          os: ubuntu-18.04
          preinstall: sudo apt-get install ninja-build libz-dev libc-ares-dev
          cflags: -O3 -gline-tables-only -DNDEBUG -include $GITHUB_WORKSPACE/.github/workflows/lib_compat.h
          cmake: >-
            "-DCMAKE_C_COMPILER=clang"
            "-DCMAKE_CXX_COMPILER=clang++"
            "-DCMAKE_EXE_LINKER_FLAGS_RELEASE=-static-libgcc -Wl,--compress-debug-sections=zlib"
            "-DLLVM_STATIC_LINK_CXX_STDLIB=ON"
            "-DLLVM_ENABLE_ZLIB=FORCE_ON"
            "-DCMAKE_PROJECT_INCLUDE=$GITHUB_WORKSPACE/.github/workflows/linux-static-deps.cmake"
          # Using c-ares as a module prevents dynamic linking of unneeded
          # libraries. All other gRPC dependencies can be built from sources.
          grpc_cmake: >-
            "-DgRPC_CARES_PROVIDER=package"
    steps:
    - name: Clone scripts
      uses: actions/checkout@v2
      with: { ref: master }
    - name: Install tools
      run: ${{ matrix.config.preinstall }}
    # Visual Studio tools require a bunch of environment variables to be set.
    # Run vcvars64.bat and re-export the current environment to the workflow.
    # (It'd be nice to only export the variables that *changed*, oh well).
    - name: Visual Studio environment
      if: matrix.config.name == 'windows'
      shell: powershell
      run: |
        cmd /c "`"${{ matrix.config.vcvars }}`">NUL && set" | Foreach-Object {
          $name, $value = $_ -split '=', 2
          if ($value) {
            echo "$($name)=$($value)" >> $env:GITHUB_ENV
          }
        }
    - name: Clone gRPC
      uses: actions/checkout@v2
      with:
        repository: grpc/grpc
        path: grpc
        # We use the same version of gRPC for LLVM's clangd-ubuntu-tsan
        # buildbot.
        # https://github.com/llvm/llvm-zorg/blob/main/buildbot/google/docker/buildbot-clangd-ubuntu-clang/Dockerfile
        ref: v1.36.3
        submodules: recursive
    - name: Build gRPC
      run: >
        mkdir $HOME/grpc-installation

        mkdir grpc-build

        cmake -G Ninja -S grpc -B grpc-build
        "-DgRPC_INSTALL=ON"
        "-DCMAKE_INSTALL_PREFIX=$HOME/grpc-installation"
        "-DCMAKE_BUILD_TYPE=Release"
        "-DCMAKE_C_FLAGS_RELEASE=${{ matrix.config.cflags }}"
        "-DCMAKE_CXX_FLAGS_RELEASE=${{ matrix.config.cflags }}"
        ${{ matrix.config.grpc_cmake }} ${{ matrix.config.cmake }}

        ninja -C grpc-build install
    - name: Fetch target commit
      uses: actions/download-artifact@v1
      with:
        name:
          env
    - name: Fetch release info
      uses: actions/download-artifact@v1
      with:
        name:
          release
    - name: Put release info into env
      run: |
        cat env/commit.env >> $GITHUB_ENV
        cat release/release.env >> $GITHUB_ENV
      shell: bash
      # Use environment variables set above to create a directory. This needs
      # to be a separate step because they are not in the context yet when
      # being set.
    - name: Set build directory
      run: |
        echo "CLANGD_DIR=clangd_${{ env.TAG_NAME }}" >> $GITHUB_ENV
      shell: bash
    - name: Clone LLVM
      uses: actions/checkout@v2
      with:
        repository: ${{ env.LLVM_REPO }}
        path: llvm-project
        ref: ${{ env.LLVM_COMMIT }}
    - name: CMake
      run: >
        mkdir ${{ env.CLANGD_DIR }}

        cp llvm-project/llvm/LICENSE.TXT ${{ env.CLANGD_DIR }}

        cmake -G Ninja -S llvm-project/llvm -B ${{ env.CLANGD_DIR }}
        "-DLLVM_ENABLE_PROJECTS=clang;clang-tools-extra"
        "-DLLVM_ENABLE_ASSERTIONS=OFF"
        "-DLLVM_ENABLE_BACKTRACES=ON"
        "-DLLVM_ENABLE_TERMINFO=OFF"
        "-DCMAKE_BUILD_TYPE=Release"
        "-DCLANG_PLUGIN_SUPPORT=OFF"
        "-DLLVM_ENABLE_PLUGINS=OFF"
        "-DCMAKE_C_FLAGS_RELEASE=${{ matrix.config.cflags }}"
        "-DCMAKE_CXX_FLAGS_RELEASE=${{ matrix.config.cflags }}"
        "-DCLANGD_ENABLE_REMOTE=ON"
        "-DGRPC_INSTALL_PATH=$HOME/grpc-installation"
        ${{ matrix.config.cmake }}
    - name: Ninja
      run: >
        ninja -C ${{ env.CLANGD_DIR }} clangd clangd-indexer clangd-index-server
        clangd-index-server-monitor
    - name: Archive clangd
      run: >
        7z a clangd.zip
        ${{ env.CLANGD_DIR }}/LICENSE.TXT
        ${{ env.CLANGD_DIR }}/bin/clangd${{ matrix.config.binary_extension }}
        ${{ env.CLANGD_DIR }}/lib/clang
    - name: Archive indexing-tools
      run: >
        7z a indexing-tools.zip
        ${{ env.CLANGD_DIR }}/LICENSE.TXT
        ${{ env.CLANGD_DIR }}/bin/clangd-indexer${{ matrix.config.binary_extension }}
        ${{ env.CLANGD_DIR }}/bin/clangd-index-server${{ matrix.config.binary_extension }}
        ${{ env.CLANGD_DIR }}/bin/clangd-index-server-monitor${{ matrix.config.binary_extension }}
        ${{ env.CLANGD_DIR }}/lib/clang
    - name: Upload clangd asset
      uses: actions/upload-release-asset@v1.0.1
      env:
        GITHUB_TOKEN: ${{ secrets.RELEASE_TOKEN }}
      with:
        upload_url: ${{ env.UPLOAD_URL }}
        asset_name: clangd-${{ matrix.config.name }}-${{ env.TAG_NAME }}.zip
        asset_path: clangd.zip
        asset_content_type: application/zip
    - name: Upload indexing-tools asset
      uses: actions/upload-release-asset@v1.0.1
      env:
        GITHUB_TOKEN: ${{ secrets.RELEASE_TOKEN }}
      with:
        upload_url: ${{ env.UPLOAD_URL }}
        asset_name: clangd_indexing_tools-${{ matrix.config.name }}-${{ env.TAG_NAME }}.zip
        asset_path: indexing-tools.zip
        asset_content_type: application/zip
    - name: Check binary compatibility
      if: matrix.config.name == 'linux'
      run: .github/workflows/lib_compat_test.py --lib=GLIBC_2.18 "$CLANGD_DIR/bin/clangd"
  # Create the release, and upload the artifacts to it.
  finalize:
    runs-on: ubuntu-latest
    needs: build
    if: always() && needs.build.result == 'success'
    steps:
    - name: Fetch release info
      uses: actions/download-artifact@v1
      with:
        name:
          release
    - name: Update the env variables
      run: >
        cat release/release.env >> $GITHUB_ENV
    - name: Publish release
      run: >
        curl -XPATCH
        "-HAuthorization: Bearer ${{ secrets.RELEASE_TOKEN }}"
        "https://api.github.com/repos/${{ github.repository }}/releases/${{ env.RELEASE_ID }}"
        "-d" '{"draft": false}'