[Hackage] #477: re-configure when the .cabal file changes

[Hackage]

#477: re-configure when the .cabal file changes
----------------------------+-----------------------------------------------
  Reporter:  duncan         |        Owner:           
      Type:  enhancement    |       Status:  new      
  Priority:  normal         |    Milestone:  Cabal-1.8
 Component:  Cabal library  |      Version:  1.6.0.1  
  Severity:  normal         |     Keywords:           
Difficulty:  normal         |   Ghcversion:           
  Platform:                 |  
----------------------------+-----------------------------------------------
 From http://trevion.blogspot.com/2008/11/cabal-is-fine-piece-of-
 software.html:

 {{{
 One nice thing about Cabal is that it really helps you
 appreciate the different parts of the build process. For
 instance, suppose that I change my cabal metadata file, and
 then attempt to build my project, for instance by saying

 runghc Setup.hs build

 Cabal will helpfully reply:

 Setup.hs: interpreter.cabal has been changed, please re-configure.

 Notice how Cabal has helpfully here noticed that there’s work
 to be done, and not done it. I found that this really helped
 me appreciate the details of the build, rather than
 unhelpfully hiding those details behind some veneer of
 “automation”.
 }}}

 We can and should do this. It is annoying.

 The solution is to save the configure flags that the user gave originally
 and to use them again to re-configure. This could be a Read/Show style
 file like we have for the `LocalBuildInfo` or it could be a readable file
 like the cabal config file. A format and parser derived from the set of
 command line arguments.

-- 
Ticket URL: <http://hackage.haskell.org/trac/hackage/ticket/477>
Hackage <http://haskell.org/cabal/>
Hackage: Cabal and related projects