[Chicken-hackers] Re: [Chicken-users] .meta needs on a per platform basis

[Kon Lovett]

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On Jan 8, 2007, at 10:47 PM, felix winkelmann wrote:

> >
<snip>
> Hm... I'd prefer not to generate stubs.

I wasn't serious.

> Actually, I'd like to extend "needs" even more: every non-symbolic
> requirement (extension-id) may alternatively be an expressions
> that should return a list of extension-ids. That way we can use
> `cond-expand' or even perform platform-specific tests whether
> certain software is installed.

Yes.

> This opens up the possibilty for eggs containing 3rd-party libraries
> (i.e. bb.meta contains a needs clause that checks fot an installed
> fltk, if it isn't require an egg containing the fltk tarball and build
> instructions).

Would be nice.

> The downside is that this may be a security problem: the code in
> the needs clause will be executed by chicken-setup, even if the
> user doesn't request an actual installation (which would run  
> the .setup
> script, which of course can do all sorts of things and may even be run
> as root).

Root will require user connivance. But a malicious egg could do some  
damage to user areas. Posting is password protected but the password  
has been distributed on an open channel in the past so ...

> cheers,
> felix

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