The PATH environment variable does not contain the path to ghc when using docker-compose about docker-haskell HOT 3 CLOSED

Thanks for the hint. I ended up not needing the login shell for my project (I had copied over and modified the compose file from another project that was running end-to-end tests).

I'll close this issue, as I don't think there is a use case for building Haskell projects in a login shell.

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This could probably be solved by adding the PATH to ~/.bashrc:

RUN echo "export PATH=${PATH}" >> /root/.bashrc

I will test this later.

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Thanks for the issue!

I'm interested to know the motivation for using a login shell? (the -l flag to bash).

https://www.gnu.org/software/bash/manual/html_node/Bash-Startup-Files.html suggests different files that could be used to add GHC to the PATH.

I've done some testing on other official images and about 50% will work with a login shell. They seem to work because they happen to copy executables into /usr/local/bin (like we do with cabal + stack) rather than doing anything with .bash_profile etc.

I've been using docker run haskell:9.2.1 bash -lc "ghc --version" as a minimal repro BTW.

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