[Hackage] #217: .hsc files do not get processed for cabal sdist?

[Hackage]

#217: .hsc files do not get processed for cabal sdist?
----------------------------+-----------------------------------------------
  Reporter:  gwern          |        Owner:           
      Type:  defect         |       Status:  reopened 
  Priority:  normal         |    Milestone:  Cabal-1.4
 Component:  Cabal library  |      Version:  1.2.3.0  
  Severity:  normal         |   Resolution:           
  Keywords:                 |   Difficulty:  normal   
Ghcversion:  6.8.2          |     Platform:           
----------------------------+-----------------------------------------------
Changes (by duncan):

  * status:  closed => reopened
  * platform:  Linux =>
  * resolution:  invalid =>
  * milestone:  => Cabal-1.4

Comment:

 Certainly putting .hs files in the extra-source-files is incorrect.

 There is a bug here however. The original description is inaccurate as it
 specifies
 {{{
 main-is:            Hslock.hsc
 }}}
 where the actual source at http://gorgias.mine.nu/repos/xmonad-utils uses
 {{{
 main-is:            Hslock.hs
 }}}
 This explains why the error message above is:
 {{{
 Setup: Hslock.hs doesn't exist
 }}}

 So, `main-is:` should always be a `.hs` or `.lhs` file and is relative to
 the `hs-source-dirs:`. When building we correctly find the
 `src/Hslock.hsc` and pre-process it. The bug is that in sdist we just look
 for `Hslock.hs` directly in the `hs-source-dirs` without considering pre-
 processors at all.

 The current `Distribution/Simple/SrcDist.hs` code just does:
 {{{
   withExe pkg_descr $ \ (Executable _ mainPath exeBi) -> do
     prepareDir verbosity targetDir pps [] exeBi
     srcMainFile <- findFile (hsSourceDirs exeBi) mainPath
 }}}

 So the mainPath is ignored for pre-processing purposes.

-- 
Ticket URL: <http://hackage.haskell.org/trac/hackage/ticket/217#comment:4>
Hackage <http://haskell.org/cabal/>
Hackage: Cabal and related projects