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chore: update Haskell Dockerfile for improved caching and dependency … #121

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Merged
andy1li merged 1 commit into from
Apr 9, 2025
Merged

chore: update Haskell Dockerfile for improved caching and dependency … #121

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20 changes: 7 additions & 13 deletions dockerfiles/haskell-9.8.Dockerfile
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Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
FROM haskell:9.8.4-bullseye

WORKDIR /app
# Ensures the container is re-built if go.mod or go.sum changes
ENV CODECRAFTERS_DEPENDENCY_FILE_PATHS="stack.yaml,package.yaml,stack.yaml.lock"

RUN mkdir -p /etc/stack

Expand All @@ -11,24 +12,17 @@ RUN echo "allow-different-user: true" >> /etc/stack/config.yaml
RUN echo "install-ghc: false" >> /etc/stack/config.yaml
RUN echo "system-ghc: true" >> /etc/stack/config.yaml

COPY stack.yaml package.yaml stack.yaml.lock /app/
WORKDIR /app

# Dummy static content to circumvent the /app doesn't exist warning
RUN mkdir /app/app
RUN echo 'main :: IO ()' >> /app/app/Main.hs
RUN echo 'main = putStrLn "Hello, World!"' >> /app/app/Main.hs
# .git & README.md are unique per-repository. We ignore them on first copy to prevent cache misses
COPY . /app/
RUN rm -rf /app/.git /app/README.md

ENV STACK_ROOT=/app/.stack

RUN stack build
RUN stack clean codecrafters-http-server

RUN mkdir /app-cached
RUN mv .stack-work /app-cached/.stack-work
RUN mv .stack /app-cached/.stack

RUN rm -rf /app/app

RUN echo "cd \${CODECRAFTERS_REPOSITORY_DIR} && stack build" > /codecrafters-precompile.sh
RUN chmod +x /codecrafters-precompile.sh

ENV CODECRAFTERS_DEPENDENCY_FILE_PATHS="stack.yaml,package.yaml,stack.yaml.lock"
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