FROM scratch AS base
ENV VERSION=18.1.8
ENV SRC_HASH=0b58557a6d32ceee97c8d533a59b9212d87e0fc4d2833924eb6c611247db2f2a
ENV SRC_FILE=llvm-project-${VERSION}.src.tar.xz
ENV SRC_SITE=https://github.com/llvm/llvm-project/releases/download/llvm-org-${VERSION}/${SRC_FILE}

FROM base AS fetch
ADD --checksum=sha256:${SRC_HASH} ${SRC_SITE} .

FROM fetch AS build
COPY --from=stagex/busybox . /
COPY --from=stagex/linux-headers . /
COPY --from=stagex/binutils . /
COPY --from=stagex/cmake . /
COPY --from=stagex/ninja . /
COPY --from=stagex/musl . /
COPY --from=stagex/gcc . /
COPY --from=stagex/python . /
COPY --from=stagex/py-setuptools . /
COPY --from=stagex/openssl . /
COPY --from=stagex/git . /
COPY --from=stagex/llvm . /
COPY --from=stagex/zlib . /
COPY --from=stagex/ninja . /
COPY --from=stagex/libxml2 . /
COPY --from=stagex/samurai . /

RUN tar -xf ${SRC_FILE}
WORKDIR /llvm-project-${VERSION}.src
RUN --network=none <<-EOF
    set -eux
    cmake \
    	-S clang \
	-B build \
	-G Ninja \
	-Wno-dev \
	-DCMAKE_BUILD_TYPE=Release \
        -DCMAKE_INSTALL_PREFIX=/usr/ \
        -DCLANG_BUILT_STANDALONE=ON \
        -DCLANG_CONFIG_FILE_SYSTEM_DIR=/etc/clang18 \
        -DCLANG_ENABLE_ARCMT=ON \
        -DCMAKE_INSTALL_RPATH=/usr/ \
        -DCLANG_LINK_CLANG_DYLIB=ON \
        -DCLANG_PLUGIN_SUPPORT=ON \
        -DCLANG_VENDOR=stagex \
        -DENABLE_LINKER_BUILD_ID=ON \
        -DLIBCLANG_BUILD_STATIC=ON
    ninja -C build clang-tblgen
    ninja -C build
EOF

FROM build AS install
RUN --network=none DESTDIR="/rootfs" cmake --install build

FROM stagex/filesystem AS package
COPY --from=install /rootfs/. /