Dockerfile

# To correctly make a statically-linked binary, we use Alpine Linux.
# The distro entirely uses musl instead of glibc which is unfriendly to be
# statically linked.
FROM alpine:3.8

RUN apk add --no-cache bash build-base curl ghc git zlib-dev
RUN curl -L -o /usr/local/bin/stack \
    https://github.com/nh2/stack/releases/download/v1.6.5/stack-1.7.1-x86_64-unofficial-fully-static-musl
RUN chmod +x /usr/local/bin/stack

RUN stack config set system-ghc --global true

# Add just the package.yaml file to capture dependencies
COPY package.yaml /src/checkmate/package.yaml
COPY stack.yaml /src/checkmate/stack.yaml

WORKDIR /src/checkmate

# Docker will cache this command as a layer, freeing us up to
# modify source code without re-installing dependencies
# (unless the .cabal file changes!)
RUN stack setup
RUN stack build --only-snapshot --flag checkmate:static

COPY . /src/checkmate

RUN stack build --flag checkmate:static --copy-bins
RUN stack exec -- checkmate || true