Hi, I took advantage of Cabal's data-files feature to allow me to portably store and access data files. Cabal generated a Paths_pkg module that I imported. From Cabal's point of view everything works: I can configure, build, install, and run. However, I can no longer use GHCi with the file that imports Paths_pkg - GHCi simply can't find the module. Is there a good way to fix this issue? Thanks, - Slava.
Vyacheslav Akhmechet wrote:
Hi,
I took advantage of Cabal's data-files feature to allow me to portably store and access data files. Cabal generated a Paths_pkg module that I imported. From Cabal's point of view everything works: I can configure, build, install, and run. However, I can no longer use GHCi with the file that imports Paths_pkg - GHCi simply can't find the module.
Is there a good way to fix this issue?
The Paths_foo.hs file is generated in a separate directory, something like dist/autogen/ (I can't remember exactly, you should be able to find it). To get GHCi to find it, you'll need to pass an appropriate -i <dir> flag. Cheers, Simon
The Paths_foo.hs file is generated in a separate directory, something like dist/autogen/ (I can't remember exactly, you should be able to find it). To get GHCi to find it, you'll need to pass an appropriate -i <dir> flag.
a general question about cabal and ghci: if I have successfully loaded my project files into ghci, I've presumably set all the right flags and paths, for ghci. if I have successfully created a cabal project, I've presumably encoded all the right flags and paths, for cabal. would it be possible to add a "cabal" command to ghci, so that we could: - create a cabal file for the currently loaded project - load a project from a cabal file or does this make no sense? doesn't visual haskell do something like that, using cabal behind the scenes? cheers, claus
Claus Reinke wrote:
The Paths_foo.hs file is generated in a separate directory, something like dist/autogen/ (I can't remember exactly, you should be able to find it). To get GHCi to find it, you'll need to pass an appropriate -i <dir> flag.
a general question about cabal and ghci:
if I have successfully loaded my project files into ghci, I've presumably set all the right flags and paths, for ghci.
if I have successfully created a cabal project, I've presumably encoded all the right flags and paths, for cabal.
would it be possible to add a "cabal" command to ghci, so that we could:
- create a cabal file for the currently loaded project - load a project from a cabal file
or does this make no sense? doesn't visual haskell do something like that, using cabal behind the scenes?
Actually I did write the code for such a thing a while back, but never finished it off. There's a design choice; do you want - GHCi to understand .cabal files, or - Cabal to launch GHCi I concluded that the latter would be better, because then any hooks in your Setup.hs file still work, for example. I think this would make a nice bitesized task for someone who wants to do some Cabal hacking. Cheers, Simon
participants (4)
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Claus Reinke -
Simon Marlow -
Simon Marlow -
Vyacheslav Akhmechet