Gentoo Archives: gentoo-portage-dev

From: Fabian Groffen <grobian@g.o>
To: gentoo-portage-dev@l.g.o
Subject: Re: [gentoo-portage-dev] [API] First steps for creating an API for portage
Date: Fri, 18 Jun 2010 10:03:57
In Reply to: Re: [gentoo-portage-dev] [API] First steps for creating an API for portage by Brian Dolbec
1 On 18-06-2010 01:27:57 -0700, Brian Dolbec wrote:
2 > Unless I'm way off the mark, your suggesting to re-code portage into "C"
3 > then create a python interface to it. Others have started such a
4 > project, but none have completed aside from paludis (C++).
6 It's actually on my wishlist for a long time, just because Python is an
7 extreme pain in my environments, and given its current maintainer it is
8 going to be an extreme pain for a long time as well.
10 > If there are other apps that would like to get info from portage via
11 > this API, that is fine with me. I have intentions of making the "C"
12 > interface available to all apps that desire to. If there is data that
13 > they want to get from portage via the API, then they should send their
14 > wish list in and we'll do our best to get it in there for them.
15 >
16 > Currently the API will be based on the packagekit portage backend code
17 > that was produced last summer and other code from porthole, portato,
18 > kportagetray. We are also going to put together a layman API for
19 > consumer apps (guis frontends) to use to operate layman without the need
20 > to run it in and parse terminal output. It too will hopefully be
21 > available via a "C" interface for non-python apps.
23 I don't want to push you into the C corner, but tools like qfile and
24 qlist are in orders of magnitude faster than their equery variants for a
25 good reason. Maybe this simple command gives you an idea why I think
26 python and portage are slow.
28 % time portageq envvar CHOST
29 powerpc-apple-darwin8
30 0.488u 0.704s 0:03.09 38.1% 0+0k 25+70io 0pf+0w
32 (three full seconds to return a very simple var)
34 That said, if you design C APIs, please design them from a C point of
35 view, initially implemented by your Python functionality doing the
36 necessary wrapping to get a sane C structure. Then they can be replaced
37 by native C code as RSI and time permits in the future.
40 --
41 Fabian Groffen
42 Gentoo on a different level


Subject Author
Re: [gentoo-portage-dev] [API] First steps for creating an API for portage "René 'Necoro' Neumann" <lists@××××××.eu>