Re: Debian package non-strict equal dependencies

[Josselin Mouette <joss@debian.org>]

Dmitrii Kashin <d.kashin@solarsecurity.ru> wrote:
> The main thing is we can describe dependency as `pkg (= "2.0")' and yum will
> install package `pkg' of version "2.0" with the maximum revision
> found. And also we can write dependency specifically with revision,
> f.e. `pkg (= "2.0-43")' and yum will install specifically "2.0-43".

> Well, now I'm trying to repack one project (my job) from centos to
> debian. And I wonder what would be the most correct way for such kind of
> dependencies.
> 
> 1) I could not write dependency operator at all.
> 2) I could write >= and version (f.e. "2.0")

You can write, for example: 
        Depends: pkg (>= 2.0), pkg (<= 2.0.~)

Note that since the introduction of ${source:Version} and
${binary:Version}, this no longer useful if both packages are part of
the same source.

> If there's package A which depends on B and C, B depends on D (=
> "2.0-43") and C depends on D (>= "2.0"). If there're packages D-2.0-43
> and D-3.0 in the repository, then yum fails to resolve dependencies.
> 
> I wonder what the apt's behavior is in such situation?

In a Debian repository, there can be only one version of D at a time, so
this cannot happen. If you want two versions of the same package in the
same repository, they need to have different source and binary names
(the name can be something like D-2.0 or D-3.0 of course).

-- 
Joss