Dockerfile

##
# Dev stage: outputs an alpine image with everything needed for development.
# (this image is used by the `make ready` command to create a dev environment)

FROM alpine:3.15 as dev

# Install build tools, Pony dependencies, LLVM libraries, and Crystal.
RUN apk add --no-cache --update \
    sudo \
    alpine-sdk coreutils linux-headers clang-dev lld \
    valgrind perl lldb \
    libexecinfo-dev libretls-dev pcre2-dev llvm12-dev \
    crystal shards

ENV CC=clang
ENV CXX=clang++

# Create a basic working directory to use for code.
RUN mkdir /opt/code
WORKDIR /opt/code

##
# Build stage: outputs an alpine image that contains a working Savi compiler
# (this image is used only as a precursor to the release stage)

FROM alpine:3.15 as build

# Install build tools, Pony dependencies, LLVM libraries, and Crystal.
# This line is kept intentionally the same as it was for the dev stage,
# so that it can share the same docker image layer cache entry.
RUN apk add --no-cache --update \
    alpine-sdk coreutils linux-headers clang-dev lld \
    valgrind perl \
    libexecinfo-dev libretls-dev pcre2-dev \
    llvm12-dev llvm12-static \
    crystal shards

ENV CC=clang
ENV CXX=clang++

COPY --from=dev /usr/lib/libponyrt.bc \
                /usr/lib/
COPY --from=dev /usr/lib/crystal/core/llvm/ext/llvm_ext.o \
                /usr/lib/crystal/core/llvm/ext/

RUN mkdir /opt/savi
WORKDIR /opt/savi
COPY Makefile main.cr /opt/savi/
COPY lib /opt/savi/lib
COPY src /opt/savi/src
RUN make bin/savi

##
# Release stage: outputs a minimal alpine image with a working Savi compiler
# (this image is made available on DockerHub for download)

FROM alpine:3.15 as release

# Install runtime dependencies of the compiler.
RUN apk add --no-cache --update \
  llvm11-libs gc pcre gcc clang lld libgcc libevent musl-dev libexecinfo-dev

RUN mkdir /opt/code
WORKDIR /opt/code

COPY --from=dev /usr/lib/libponyrt.bc \
                /usr/lib/

COPY packages    /opt/savi/packages
COPY --from=build bin/savi /bin/savi

ENTRYPOINT ["/bin/savi"]