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From: Alexey Tourbin <alexey.tourbin@gmail.com>
To: devel@lists.altlinux.org
Subject: [devel] удволетворение зависимостей в новом rpm
Date: Sun, 28 May 2017 09:10:37 +0300
Message-ID: <20170528061036.GA31735@celery> (raw)

Уважаемые мужчины, жители Энрофа!

Я заметил, что ваш новый rpm, когда видит зависимость с версией,
Requires: foo >= VER, считает ее удволетворенной даже тогда,
когда имя foo предоставлено без версии, Provides: foo.

$ cat foo.spec
Name: foo
Version: 1.0
Release: alt0
Summary: foo package
License: GPL
Group: System
Requires: python2.7(pwd) > 666
%description
%files

$ rpm -bb foo.spec
Processing files: foo-1.0-alt0
Requires: python2.7(pwd) > 666
Wrote: /home/at/RPM/RPMS/x86_64/foo-1.0-alt0.x86_64.rpm

$ rpm -iv --test /home/at/RPM/RPMS/x86_64/foo-1.0-alt0.x86_64.rpm
Preparing packages...     
Running /usr/lib/rpm/posttrans-filetriggers

$ apt-get --dry-run install /home/at/RPM/RPMS/x86_64/foo-1.0-alt0.x86_64.rpm
Reading Package Lists... Done
Building Dependency Tree... Done
Selecting foo for '/home/at/RPM/RPMS/x86_64/foo-1.0-alt0.x86_64.rpm'
The following NEW packages will be installed:
  foo
0 upgraded, 1 newly installed, 0 removed and 688 not upgraded.
Inst foo (1.0-alt0 localhost)
Conf foo (1.0-alt0 localhost)

$ rpm -q --whatprovides --provides 'python2.7(pwd)' |grep -w pwd
python2.7(pwd)

А узнал я об этом почти что случайно, в результате того, что от безделия
просматривал код rpmds.c.  Как писал Чехов, однажды, лежа на диванчике
и читая код rpmds.c, с меня слетела шляпа.

/usr/src/debug/rpm-4.13.0/lib/rpmds.c:
  1148      if (!(AEVR && *AEVR && BEVR && *BEVR)) {
  1149          /* If either EVR is non-existent or empty, always overlap. */
  1150          result = 1;
  1151      } else {
  1152          /* Both AEVR and BEVR exist, compare [epoch:]version[-release]. */
  1153          result = rpmdsCompareEVR(AEVR, AFlags, BEVR, BFlags, B->nopromote);
  1154      }

Надо ли говорить, что такое сравнение версий кажется мне вызывающе
и абсурдно неправильным, и что раньше так не было.

(hasher инициализирован из репозитория p8)

$ hsh-install /home/at/RPM/RPMS/x86_64/foo-1.0-alt0.x86_64.rpm   
error: failed dependencies:
        python2.7(pwd) > 666 is needed by foo-1.0-alt0
hsh-install: Packages installation failed.


                 reply	other threads:[~2017-05-28  6:10 UTC|newest]

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