Proposal: Add getFullProgName
johan.tibell at gmail.com
Tue Jun 19 18:19:46 CEST 2012
On Tue, Jun 19, 2012 at 8:54 AM, Johan Tibell <johan.tibell at gmail.com>wrote:
> On Tue, Jun 19, 2012 at 7:53 AM, Heinrich Apfelmus <
> apfelmus at quantentunnel.de> wrote:
>> In addition, I don't know how to implement this function correctly.
>>> For example, if you alias ghc to another name the heuristic in the
>>> executable-path package fails:
>> Good point. For the use case mentioned above, any quick and dirty
>> heuristic that works most of the time would be sufficient, though.
>> Ideally, Haskell interpreters would set an environment variable when they
>> interpret a source file.
> * we can't implement this reliably,
> * the distinction into these three groups doesn't necessarily work for
> all compilers, and
> * the distinction (I assume) isn't useful in most use cases
Another problem with the executable-path like distinction is that it's no
longer possible to find out which executable (i.e. ghc) is running the
script. At a minimum the Script and Interactive constructors would have to
getExecutablePath :: IO FilePath
has a clear meaning: return the path to the executable that's currently
executing. If we want a function that provides the
script/interactive/executable guessing, we should provide both functions.
The guessing one should have this warning:
-- N.B. This function might return Executable in the case of
Script/Interactive and vice versa.
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