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Re: How to download source package using only console?

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On 15.05.2023 05:43, Vincent Lefevre wrote:
> On 2023-05-14 14:17:05 +0500, Alexander V. Makartsev wrote:
>> [...]
>> I think you haven't noticed that I requested for "4.9.1-1" version from
>> "testing" specifically,
> You can't. You can either request some given version, e.g. 4.9.1-1
> (but this will work only if it can be found from your local database),
> or the version from some given distribution, e.g. "testing".
>
> But my point is that your database is obsolete, because if you ask
> the version from testing, apt thinks that it is 3.2.0-3.1, while it
> should be 4.9.1-1. You need to fix that.
What is the best approach to fix that? Keep in mind, I only need a 
source package(-s) from "testing".
So, just to be safe, "deb" source for "testing" was commented out:

    $ cat /etc/apt/sources.list | grep -iE "testing"
    #deb https://deb.debian.org/debian/ testing main contrib non-free
    deb-src https://deb.debian.org/debian/ testing main contrib non-free


>> hence why the command was "$ apt source lego/testing" not just "$ apt source
>> lego".
>> There is no reason for building a backport package for "stable" using a
>> source package from "stable"...
>>
>> I've changed all my repo mirrors to "deb.debian.org" suspecting the previous
>> mirror I used was somehow out-of-date. Why is my output differ from yours?
>>
>>     $ apt-show-versions -a lego
>>     lego:amd64 3.2.0-3.1+b5 bullseye deb.debian.org
>>     No proposed-updates version
>>     No stable-updates version
>>     No testing version
>>     No unstable version
>>     lego:amd64 not installed
>>     lego:i386 3.2.0-3.1+b5 bullseye deb.debian.org
>>     No proposed-updates version
>>     No stable-updates version
>>     No testing version
>>     No unstable version
>>     lego:i386 not installed
> After changing your sources.list, you need an "apt update" again.
Of course, I always do "$ sudo apt update" after changing apt config 
files and before any package manipulation.

>> Yet "rmadison" reports there is a version "4.9.1-1" available in "testing":
>>
>>     $ rmadison lego
>>     lego       | 0.3.1-5+b13   | oldstable  | amd64, arm64, armel,
>>     armhf, i386, mips, mips64el, mipsel, ppc64el, s390x
>>     lego       | 3.2.0-3.1+b5  | stable     | amd64, arm64, armel,
>>     armhf, i386, mips64el, mipsel, ppc64el, s390x
>>     lego       | 4.9.1-1       | testing    | amd64, arm64, armel,
>>     armhf, i386, mips64el, mipsel, ppc64el, s390x
>>     lego       | 4.9.1-1       | unstable   | amd64, arm64, armel,
>>     armhf, i386, mips64el, mipsel, ppc64el, s390x
>>
>> I suspect "apt-show-versions" output is inconsistent because I only request
>> "deb-src" from "testing" in "sources.list", as I've shown before.
> Probably. "apt-show-versions" considers only the binary packages
> (but "lego" is only a binary package).
I see. "rmadison" utility is checking out repos directly, where as 
"apt-show-versions" rely on local database information.

> [...]
>> I did some additional research and I think I got it.
>> "lego" package is special because its source package is named differently:
> Yes, as said by apt above:
>
>    Picking 'golang-github-xenolf-lego' as source package instead of 'lego'
>
> [...]
>> But why "apt" doesn't play along, since it knows the source package for
>> "lego" has different name, but ignores the "testing" part of the request?
>>
>>     $ apt source lego/testing
>>     Reading package lists... Done
>>     Picking 'golang-github-xenolf-lego' as source package instead of 'lego'
>>     E: Can not find version '3.2.0-3.1' of package 'lego'
>>     E: Unable to find a source package for golang-github-xenolf-lego
>>
>> Looks like an "apt" bug to me.
> Probably not. You are doing a request on a binary package (since
> "lego" is not a source package). The translation from the binary
> package to the source package depends on the particular version of
> the binary package. So lego/testing will correspond to the binary
> package from testing, which is 3.2.0-3.1+b5 in your case (because
> of your obsolete database due to the missing "deb" for testing in
> sources.list). Then apt translates this to the source package (of
> the same version) golang-github-xenolf-lego 3.2.0-3.1, which is
> unknown on your machine because the deb-src database is up-to-date
> (contrary to the deb database). Something like that.
>
I see. That explains why I can request source package 
"golang-github-xenolf-lego/testing" directly and get the right one.
So, in my case, I won't be able to reliably get a source package(-s) 
from "testing" if I don't add "deb" part of "testing" to "sources.list", 
which could be a different can of worms...
Is this something for me to just be aware of and leave it as is now, or 
is there more elegant solution?

-- 
With kindest regards, Alexander.

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Thread

How to download source package using only console? "Alexander V. Makartsev" <avbetev@gmail.com> - 2023-05-13 21:20 +0200
  Re: How to download source package using only console? Vincent Lefevre <vincent@vinc17.net> - 2023-05-14 07:10 +0200
    Re: How to download source package using only console? "Alexander V. Makartsev" <avbetev@gmail.com> - 2023-05-14 11:20 +0200
      Re: How to download source package using only console? Greg Wooledge <greg@wooledge.org> - 2023-05-14 15:20 +0200
      Re: How to download source package using only console? Vincent Lefevre <vincent@vinc17.net> - 2023-05-15 02:50 +0200
        Re: How to download source package using only console? "Alexander V. Makartsev" <avbetev@gmail.com> - 2023-05-15 07:30 +0200
          Re: How to download source package using only console? Vincent Lefevre <vincent@vinc17.net> - 2023-05-15 12:30 +0200
            Re: How to download source package using only console? "Alexander V. Makartsev" <avbetev@gmail.com> - 2023-05-15 21:50 +0200

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