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Compile dependencies separately

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So that they can be more aggressively cached by Docker!  The Docker hub
will take advantage of this, too, which should make our autobuilds
faster.
This commit is contained in:
Douglas Creager 2019-06-05 09:58:25 -04:00
parent 353c99db2d
commit e3f42ee277
1 changed files with 16 additions and 2 deletions
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18
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@ -1,12 +1,26 @@
FROM haskell:8.6 as build
WORKDIR /build
RUN cabal new-update
# Build our upstream dependencies after copying in only enough to tell cabal
# what they are. This will make these layers cache better even as we change the
# code of semantic itself.
COPY semantic.cabal /build/
COPY cabal.project /build/
COPY semantic-core/semantic-core.cabal /build/semantic-core/
COPY vendor /build/vendor
RUN cabal new-build --only-dependencies
# Once the dependencies are built, copy in the rest of the code and compile
# semantic itself.
COPY . /build
RUN cabal new-build semantic:exe:semantic
# A fake `install` target until we can get `cabal new-install` to work
RUN cp $(find dist-newstyle -name semantic -type f -perm -u=x) /semantic
RUN cp $(find dist-newstyle -name semantic -type f -perm -u=x) /usr/local/bin/semantic
# Create a fresh image containing only the compiled CLI program, so that the
# image isn't bulked up by all of the extra build state.
FROM debian:stretch
RUN apt-get update && \
apt-get install -y \
@ -15,5 +29,5 @@ RUN apt-get update && \
apt-get autoremove -y && \
apt-get clean -y && \
rm -rf /var/lib/apt/lists/*
COPY --from=build /semantic /usr/local/bin/semantic
COPY --from=build /usr/local/bin/semantic /usr/local/bin/semantic
ENTRYPOINT ["/usr/local/bin/semantic"]