Re: [Pyobjc-dev] recommended method of checking whether UniversalMacPython is installed?

[ytrewq1 <yt...@gm...>]

On 6/21/06, Bob Ippolito <bo...@re...> wrote:
>
> On Jun 20, 2006, at 11:12 PM, Ronald Oussoren wrote:
>
> > There isn't a recommended way for that, or rather the recommended
> > way is to not care. Why do you want to know?
>
> Probably for that QuickSilver meta-plugin, but it seems like a better
> idea to just have the meta-plugin just embed a specific Python that
> all of the python-based plugins depend on.

Yes, it is for that meta-plugin.  I'm not so sure it is practical to
embed a specific Python in this case.  IIUC, the size of the
download will increase a fair bit and I'm under the impression
that the location that's hosting the files for download may not be
up to handling this.  I plan to ask about this though after trying to
estimate the likely change in size of the meta-plugin.

If I do embed a specific Python though, is it easy to get all
libraries that ship with Python to be embedded too?  I ask
because I have a plug-in which allows users to write
somewhat sophisticated actions for Quicksilver using
more-or-less 'ordinary' Python scripts and I don't think py2app
will have a chance to analyze the import statements from those
as they will be written and installed post-plug-in-installation.

> A cheap way is to check the executable or dylib to see if it starts
> with the four bytes '\xca\xfe\xba\xbe'. That's the signature for a
> fat Mach-O object.

Thanks for this tip.  I will test this.