[Hackage] #58: allow dev repo to be specified in cabal file

[Hackage]

#58: allow dev repo to be specified in cabal file
----------------------------+-----------------------------------------------
  Reporter:  ijones         |        Owner:           
      Type:  enhancement    |       Status:  new      
  Priority:  high           |    Milestone:  Cabal-1.6
 Component:  Cabal library  |      Version:           
  Severity:  normal         |   Resolution:           
  Keywords:                 |   Difficulty:  normal   
Ghcversion:  6.2.1          |     Platform:  Linux    
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Comment (by duncan):

 A similar proposal for the RPM packaging system:
 http://lwn.net/Articles/290300/

 {{{
 SCMType: {cvs|svn|git|hg|etc.}
 SCMRepo: <repo_url, complete spec for SCMs like git, would be cvs_root
 for cvs>
 SCMModule: <module name for repo types that need this, such as cvs>
 SCMTag: <tag representing exact source matching binary package>
 SCMBranch: <branch on which tag exists, allowing the installation of
 later sources from the same product line branch instead of exact sources
 of the installed package at the user's option>
 }}}

 Clearly we need to know which scm we're dealing with. But I think we also
 want to be able to refer to more specific things, in particular the 'HEAD'
 branch where new development happens and also the branch from which this
 release was made (if different) and optionally a tag for this specific
 release.

 Not all that information is required of course, but we should be able to
 specify it in a clear way. If the meaning is well defined then it allows
 us to to integration like rebuilding from the same branch+tag, following
 activity in a head repo (for info on the hackage website).

 If we don't give clear meanings it's almost useless, it can then only be
 used as a link for humans to follow and interpret.

-- 
Ticket URL: <http://hackage.haskell.org/trac/hackage/ticket/58#comment:13>
Hackage <http://haskell.org/cabal/>
Hackage: Cabal and related projects