llvm.yml

name: Build LLVM

on:
  workflow_dispatch:
    inputs:
      version:
        description: 'LLVM version to build'
        default: '18.1.8'

permissions:
  contents: write

env:
  LLVM_VERSION: ${{ inputs.version }} 
  LLVM_TARGETS: 'clang-format'
  LLVM_BINS: 'clang-format'
  LLVM_LIBS: ''
  ZIG_VERSION: '0.14.0-dev.2487+af89bb05d'
jobs:
  create-release:
    runs-on: ubuntu-latest
    steps:
      - name: Create Github release
        run: |
          gh release create -R ${{ github.repository }} llvm-$LLVM_VERSION || true
        env:
          GITHUB_TOKEN: ${{ github.TOKEN }}
  build:
    needs: create-release
    strategy:
      matrix:
        platform:
          - os: darwin-arm64
            runner: macos-latest
            toolchain: default
            BIN_SUFFIX: ''
            SO_SUFFIX: '${{ inputs.version }}.dylib'
            STATIC_LIB_SUFFIX: 'a'
            LLVM_TARGETS_TO_BUILD: 'ARM'
          - os: linux-amd64
            runner: ubuntu-latest
            toolchain: default
            BIN_SUFFIX: ''
            SO_SUFFIX: 'so.${{ inputs.version }}'
            STATIC_LIB_SUFFIX: 'a'
            LLVM_TARGETS_TO_BUILD: 'X86'
          - os: linux-arm64
            runner: ubuntu-latest
            toolchain: zig-linux-arm64
            BIN_SUFFIX: ''
            SO_SUFFIX: 'so.${{ inputs.version }}'
            STATIC_LIB_SUFFIX: 'a'
            LLVM_TARGETS_TO_BUILD: 'ARM'
          - os: windows-amd64
            runner: windows-latest
            toolchain: default
            TAR_ARGS: '--exclude=*/clang/test/Driver/Inputs/* --exclude=*/libcxx/test/std/input.output/filesystems/Inputs/static_test_env/* --exclude=*/libclc/amdgcn-mesa3d'
            BIN_SUFFIX: '.exe'
            SO_SUFFIX: 'dll'
            STATIC_LIB_SUFFIX: 'lib'
            LLVM_TARGETS_TO_BUILD: 'X86'
    runs-on: ${{ matrix.platform.runner }}
    name: ${{ matrix.platform.os }}
    steps:
      - uses: actions/checkout@v4
      - name: Setup for macOS
        if: runner.os == 'macOS'
        run: |
          brew install cmake ninja
      - name: Setup for Linux
        if: runner.os == 'Linux'
        run: |
          sudo apt-get install -y cmake ninja-build
      - name: Setup for Windows
        if: runner.os == 'Windows'
        run: |
          choco install cmake ninja curl
      - name: Get zig toolchain
        if: startsWith(matrix.platform.toolchain, 'zig')
        shell: bash
        run: |
            echo "zig is $ZIG_VERSION"
            curl -L https://ziglang.org/builds/zig-linux-x86_64-${ZIG_VERSION}.tar.xz -o zig.tar.xz
            mkdir zig
            tar -C zig --strip-components=1 -xJf zig.tar.xz
            cd zig
            pwd >> $GITHUB_PATH
      - name: Get llvm
        shell: bash
        run: |
          curl -L https://github.com/llvm/llvm-project/releases/download/llvmorg-$LLVM_VERSION/llvm-project-$LLVM_VERSION.src.tar.xz -o llvm.tar.xz
          mkdir llvm
          tar -C llvm --strip-components=1 ${{ matrix.platform.TAR_ARGS }} -xJf llvm.tar.xz
      - name: Generate build files
        shell: bash
        run: |
          cd llvm
          cmake -B build llvm -GNinja \
            -DCMAKE_TOOLCHAIN_FILE=$GITHUB_WORKSPACE/build/llvm/${{ matrix.platform.toolchain }}.cmake \ 
            $(cat $GITHUB_WORKSPACE/build/llvm/common.args) \
            -DLLVM_TARGETS_TO_BUILD=${{ matrix.platform.LLVM_TARGETS_TO_BUILD }}
      - name: Build targets
        shell: bash
        run: |
          cd llvm/build
          ninja $LLVM_TARGETS
      - name: Upload products
        shell: bash
        run: |
          cd llvm/build/bin
          for BIN in $LLVM_BINS; do
            FILENAME=llvm-$LLVM_VERSION-${{ matrix.platform.os }}-$BIN${{ matrix.platform.BIN_SUFFIX }}
            mv $BIN${{ matrix.platform.BIN_SUFFIX }} $FILENAME 
            gh release upload -R ${{ github.repository }} llvm-$LLVM_VERSION $FILENAME || true
          done

          cd ../lib
          for LIB in $LLVM_LIBS; do
            FILENAME=llvm-$LLVM_VERSION-${{ matrix.platform.os }}-$LIB.${{ matrix.platform.SO_SUFFIX }}
            mv $LIB.${{ matrix.platform.SO_SUFFIX }} $FILENAME
            gh release upload -R ${{ github.repository }} llvm-$LLVM_VERSION $FILENAME || true
          done
        env:
          GITHUB_TOKEN: ${{ github.TOKEN }}