# Build the LLVM base image for the TinyGo compiler image.
# It is built again only when llvm-version.txt or the build recipe changes.
# tools/llvm-image-tag.sh prints the tag and lists the files that set it.

# tinygo-llvm stage obtains the llvm source for TinyGo
FROM golang:1.27 AS tinygo-llvm

RUN apt-get update && \
    apt-get install -y apt-utils make cmake clang-17 ninja-build && \
    rm -rf \
        /var/lib/apt/lists/* \
        /var/log/* \
        /var/tmp/* \
        /tmp/*

COPY ./GNUmakefile /tinygo/GNUmakefile
COPY ./make /tinygo/make
COPY ./llvm-version.txt /tinygo/llvm-version.txt

# Remove the git history in the layer that makes it. A later layer only hides
# files from a parent layer.
RUN cd /tinygo/ && \
    make llvm-source && \
    rm -rf llvm-project/.git

# tinygo-llvm-build stage build the custom llvm with xtensa support.
# The object files are removed in the same layer as the build to keep the image
# small. The static libraries and the headers stay, because TinyGo links to
# them. The CI caches keep the same subset, see
# .github/actions/setup-llvm/action.yml.
FROM tinygo-llvm AS tinygo-llvm-build

# Link the package to the repository. See
# https://docs.github.com/en/packages/learn-github-packages/connecting-a-repository-to-a-package
LABEL org.opencontainers.image.source=https://github.com/tinygo-org/tinygo

RUN cd /tinygo/ && \
    make llvm-build && \
    find llvm-build -name CMakeFiles -prune -exec rm -r '{}' \;