[RFC] Don't overwrite an existing Makefile

[Bryan O'Sullivan]

Hi, Simon -

Another problem with "Setup makefile" is that it will overwrite an 
existing Makefile, even if that file perhaps ought to be present.  For 
example, using "Setup makefile" in a Cabal repo clobbers Cabal's own 
Makefile.

The attached patch causes "Setup makefile" to refuse to overwrite an 
existing file.  I'm a bit ambivalent about it, but I don't see another 
simple, predictable way to avoid the possibility for foot-shooting.

	<b
-------------- next part --------------
A non-text attachment was scrubbed...
Name: makefile.patch
Type: text/x-patch
Size: 560 bytes
Desc: not available
Url : http://www.haskell.org/pipermail/cabal-devel/attachments/20070424/63f8160e/makefile.bin