what's in a package name?

[Simon Marlow]

Andrew Pimlott wrote:
> I just tried creating my first package with Cabal, and chose a package
> version, "0", that obeys the rules documented by Cabal:  "a sequence of
> one or more integers separated by dots"[1].  But at the end of the
> build, I got "ghc-pkg: ambiguous package identifier: foo-0".  (I am
> using ghc 6.4.2.)
> 
> Simon Marlow already commented on this silly problem[2], but it appears
> it was never resolved.  Can someone just decide on the systax of a
> package identifier?  Cabal's documented rules seem sane to me:
> 
>     A package is identified by a globally-unique package name, which
>     consists of one or more alphanumeric words separated by hyphens. To
>     avoid ambiguity, each of these words should contain at least one
>     letter....  A particular version of the package is distinguished by
>     a version number, consisting of a sequence of one or more integers
>     separated by dots. These can be combined to form a single text
>     string called the package ID, using a hyphen to separate the name
>     from the version, e.g. “HUnit-1.1”.

Fixed now, to match the Cabal docs.

Cheers,
	Simon