distributable:
  url: https://github.com/llvm/llvm-project/releases/download/llvmorg-{{ version }}/llvm-project-{{ version }}.src.tar.xz
  strip-components: 1

versions:
  github: llvm/llvm-project
  strip: /^llvmorg-/

provides:
  - bin/lld
  - bin/clang
  - bin/clang++
  - bin/cc
  - bin/c++
  - bin/cpp
  - bin/ar
  - bin/as
  - bin/nm
  - bin/objcopy
  - bin/ranlib
  - bin/readelf
  - bin/strings
  - bin/strip

dependencies:
  zlib.net: 1

build:
  dependencies:
    cmake.org: 3
    ninja-build.org: 1
    python.org: '>=3<3.12'
    crates.io/semverator: '*'
  working-directory: build
  script:
    # Building compiler-rt on darwin+aarch64 fails for versions less than
    # 14 with the below configuration. FIXME if possible, of course.
    - run: |
        RUNTIMES="-DLLVM_ENABLE_RUNTIMES='compiler-rt;libcxx;libcxxabi;libunwind'"
        if test "{{hw.platform}}" = "linux"; then
          ARGS="$ARGS $RUNTIMES"
        elif semverator satisfies '>=14' {{version}}; then
          ARGS="$ARGS $RUNTIMES"
        elif test "{{hw.arch}}" = "x86-64" && semverator satisfies '>=14' {{version}}; then
          ARGS="$ARGS $RUNTIMES"
        fi
      # if: linux || >=14 || (x86-64 && >=13)  ## Brewkit can't do this. Yet.
    - cmake ../llvm -G Ninja $ARGS
    - ninja
    - ninja install

    # other tools simply expect these symlinks and often fail without them
    # NOTE forcing symlinks because we build with ourselves and sometimes that
    # means we're building with the exact same version FIXME
    - run: |
        ln -sf clang cc
        ln -sf clang++ c++
        ln -sf clang-cpp cpp
        for x in ar as nm objcopy ranlib readelf strings strip; do
          ln -sf llvm-$x $x
        done
      working-directory: ${{prefix}}/bin

    # move linux libs into /lib
    - run: |
        TARGET="$(find . -maxdepth 1 -type d -name \*-unknown-linux-gnu)"
        if test -n "$TARGET"; then
          mv "$TARGET"/* .
          rmdir "$TARGET"
          ln -s . "$TARGET"
        fi
      working-directory: ${{prefix}}/lib
      if: linux

  receipt:
    - LLVMConfig.cmake
  env:
    ARGS:
      - -DCMAKE_INSTALL_PREFIX="{{ prefix }}"
      - -DCMAKE_BUILD_TYPE=Release
      - -DLLVM_ENABLE_PROJECTS='lld;clang'
      - -DLLVM_INCLUDE_DOCS=OFF
      - -DLLVM_INCLUDE_TESTS=OFF
      - -DLLVM_ENABLE_RTTI=ON
      - -DLLVM_BUILD_LLVM_DYLIB=ON
    linux:
      ARGS:
        # the default is `ld` however clang when handling linking itself
        # internally passes flags that, in fact, expect `lld`
        #NOTE only wanted on linux because on macOS we actually *need* the Apple
        # provided `ld` or things *also* break 😆
        - -DCLANG_DEFAULT_LINKER=lld
        # Needed with the CMAKE_C_COMPILER_TARGET to compile compiler-rt on linux
        # https://reviews.llvm.org/D147598
        - -DCOMPILER_RT_DEFAULT_TARGET_ONLY=ON
    darwin:
      ARGS:
        #FIXME shouldn’t *have to* require the command line tools package
        #FIXME this is no good for systems with only Xcode installed
        #NOTE how do Apple make their LLVM find both? we want the same trick
        - -DDEFAULT_SYSROOT=/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk
    linux/x86-64:
      ARGS:
        # required to build something that works on linux/x86-64
        - -DCLANG_DEFAULT_CXX_STDLIB=libstdc++
        - -DCLANG_DEFAULT_RTLIB=libgcc
        - -DCOMPILER_RT_INCLUDE_TESTS=OFF
        - -DCOMPILER_RT_USE_LIBCXX=OFF
        # otherwise compiler-rt fails to build
        # https://reviews.llvm.org/D147598
        - -DCMAKE_C_COMPILER_TARGET="x86_64-unknown-linux-gnu"
    linux/aarch64:
      ARGS:
        # otherwise compiler-rt fails to build
        # https://reviews.llvm.org/D147598
        - -DCMAKE_C_COMPILER_TARGET="aarch64-unknown-linux-gnu"

test:
  fixture: |
    #include <stdio.h>
    int main() {
      printf("Hello World!\n");
      return 0;
    }
  dependencies:
    crates.io/semverator: '*'
  script:
    # Building compiler-rt on darwin+aarch64 fails for versions less than
    # 14 with the below configuration, and on darwin generally for 18.1.3.
    # FIXME if possible, of course.
    - run: LINUX=1
      if: linux
    - run: AARCH64=1
      if: aarch64
    - run: GT13=1
      if: '>=13'
    - run: GT14=1
      if: '>=14'
    - run: EQ1813=1
      if: '=18.1.3'
    # cases
    # "1,*,*,*," => linux != 18.1.3
    # ",,1,*," => darwin+x86-64 >=13 != 18.1.3
    # ",1,1,1," => darwin+aarch64 >=14 != 18.1.3
    - run: |
        case "$LINUX,$AARCH64,$GT13,$GT14,$EQ1813" in
          "1,*,*,*,"|",,1,*,"|",1,1,1,") ARGS="$ARGS -fsanitize=address,undefined";;
          *) ;;
        esac
      # if: linux || >=14<18.1.3 || (x86-64 && >=13<18.1.3)  ## Brewkit can't do this. Yet.

    - mv $FIXTURE $FIXTURE.c
    - clang $ARGS $FIXTURE.c
    - ./a.out
  env:
    ARGS:
      - -Wl,-rpath,$PKGX_DIR