feed-1.3.0.0 testsuite: The IO action ‘main’ is not defined in module ‘Main’

[juhp]

In the Stackage Nightly build

    Building test suite 'readme' for feed-1.3.0.0..
    [1 of 1] Compiling Main
    
    /tmp/ghc70_0/ghc_1.lpp:1:1: error:
        The IO action ‘main’ is not defined in module ‘Main’

[bergmark]

@juhp Thanks. This may be an issue with the stackage build as it works otherwise. This is not a normal setup as we are compiling README.lhs with markdown-unlit, but it does contain a Main module with a main function.

test-suite readme
  ghc-options:       -Wall -pgmL markdown-unlit
  main-is:           README.lhs
[...]
  build-tool-depends:
    markdown-unlit:markdown-unlit >= 0.4 && < 0.6

[jkeuhlen]

Is there anything else we need to do here? I'm not sure why this would fail in stackage nightly.

[felixonmars]

I got the same problem on Arch. The problem is the file README.lhs becomes a text file in the hackage tarball, while it should be a symlink instead. It might have been generated under Windows or other environments that don't support symlinks.

Did a simple ln -sf README.md README.lhs and the build succeeded.

[jkeuhlen]

@felixonmars Oh that's good to know, thank you! I did generate the hackage upload on Windows. Do you know if there is a good way to get around that issue when I generate, or should I just use a unix environment instead?

[felixonmars]

@jkeuhlen I think it's easier to just generate it in a unix environment :)

[peti]

We have the same problem in NixOS.

[jkeuhlen]

I just uploaded 1.3.0.1 to hackage which was built on linux and should no longer have this issue. Thanks for the reports everyone!