[GHC] #1880: Unify flag descriptions to generate both docs and code

[GHC]

#1880: Unify flag descriptions to generate both docs and code
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 Reporter:  simonmar  |          Owner:             
     Type:  task      |         Status:  new        
 Priority:  normal    |      Milestone:  6.10 branch
Component:  Compiler  |        Version:  6.8.1      
 Severity:  normal    |     Resolution:             
 Keywords:            |     Difficulty:  Unknown    
 Testcase:            |   Architecture:  Unknown    
       Os:  Unknown   |  
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Comment (by duncan):

 I think we're getting off-topic. As I understand it, this ticket is about
 generating all the flags related features (code and docs) from one
 description not about ghc knowing where someone installed the user guide.

 If that is on topic then I'd add that I don't actually see what problem
 `ghc --print-docdir` is solving. Afaik, no other program has such a thing.

 I'd also like to add a plug for command line flag name completion. We've
 added that feature in `cabal-install` and it's enormously helpful. It
 saves typing but most importantly saves having to remember a lot of flag
 names. With a little support in ghc itself the scripts for bash or other
 standard shells become pretty trivial. Eg the `cabal` program has a
 `--list-options` flag which prints each flag, one per line.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1880#comment:7>
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