mirror of
git://projects.qi-hardware.com/wernermisc.git
synced 2024-11-15 04:09:43 +02:00
61 lines
2.4 KiB
Plaintext
61 lines
2.4 KiB
Plaintext
|
qpkg - Query package databases
|
||
|
|
==============================
|
||
|
|
|
||
|
|
qpkg is a tool that reads package databases of the kind used by opkg
|
||
|
|
in OE-derived Jlime (which are very similar to what dpkg and apt use)
|
||
|
|
and that can answer a number of queries on them.
|
||
|
|
|
||
|
|
While being able to perform some of the database operations commonly
|
||
|
|
found in package managers, qpkg is not a package manager itself.
|
||
|
|
However, it may be used to help a package manager do its work faster.
|
||
|
|
|
||
|
|
|
||
|
|
Except for the files jrb.h and jrb.c, this work is distributed under
|
||
|
|
the terms of the GNU GENERAL PUBLIC LICENSE, Version 2:
|
||
|
|
|
||
|
|
This program is free software; you can redistribute it and/or modify
|
||
|
|
it under the terms of the GNU General Public License as published by
|
||
|
|
the Free Software Foundation; either version 2 of the License, or
|
||
|
|
(at your option) any later version.
|
||
|
|
|
||
|
|
For your convenience, a copy of the complete license has been included
|
||
|
|
in the file COPYING.GPLv2.
|
||
|
|
|
||
|
|
|
||
|
|
The implementation of red-black trees, in jrb.h and jrb.c, is
|
||
|
|
distributed under the terms of the GNU Lesser General Public License,
|
||
|
|
Version 2.1:
|
||
|
|
|
||
|
|
This library is free software; you can redistribute it and/or
|
||
|
|
modify it under the terms of the GNU Lesser General Public
|
||
|
|
License as published by the Free Software Foundation; either
|
||
|
|
version 2.1 of the License, or (at your option) any later version.
|
||
|
|
|
||
|
|
For your convenience, the original copyright notice accompanying JRB
|
||
|
|
and a copy of the license have been included in the files READNE.jrb
|
||
|
|
and LICENSE.jrb, respectively.
|
||
|
|
|
||
|
|
|
||
|
|
Objectives
|
||
|
|
----------
|
||
|
|
|
||
|
|
The original motivation for qpkg comes from the observation that opkg
|
||
|
|
consumes inordinate amounts of memory when determining the
|
||
|
|
prerequisites for installing a package on a given system, and the
|
||
|
|
proof of concept implementation of a shell script wrapper by Rafael
|
||
|
|
Zurita, that performs a large subset of the same task with much less
|
||
|
|
overhead.
|
||
|
|
|
||
|
|
qpkg thus aims to load and parse large package databases as quickly
|
||
|
|
and memory-efficiently as possible, and to provide a number of query
|
||
|
|
functions that operate on the data.
|
||
|
|
|
||
|
|
A second objective is to provide a means to test the integrity of a
|
||
|
|
package database, and to perform simple "what if" queries, e.g., to
|
||
|
|
test which packages would become uninstallable if a package was to be
|
||
|
|
removed or a conflict was to be introduced.
|
||
|
|
|
||
|
|
This is to aid not only in general housekeeping of package databases,
|
||
|
|
but also to assist in generating - at the package level - restricted
|
||
|
|
distributions derived from a master distribution.
|