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Bug#1108505: apt outputs logical-or vertical bar in recommended packages section



Hi,

On Mon, Jun 30, 2025, 03:49 Julian Andres Klode <jak@debian.org> wrote:
On Sun, Jun 29, 2025 at 03:02:44PM -0700, E Shattow wrote:
> Package: apt
> Version: 3.0.2
> Severity: normal
> X-Debbugs-Cc: lucent@gmail.com
>
> Dear Maintainer,
>
> `apt install git devscripts` in a clean trixie dist pbuilder environment and
> see this:
>
> ...
> Recommended packages:
>   dctrl-tools                lintian          unzip
> pristine-tar                libxstring-perl
>   dput                       lzip             wget                       less
> libdata-dump-perl
>   | dupload                  python3-apt      | curl                     ssh-
> client                  libhtml-form-perl
>   libdistro-info-perl        python3-debian   debian-keyring             gnupg
> libhttp-daemon-perl
>   libgit-wrapper-perl        python3-magic    debian-tag2upload-keyring
> libgpg-error-l10n           libmailtools-perl
>   liblist-compare-perl       python3-unidiff  equivs
> libhtml-format-perl         python3-argcomplete
>   libstring-shellquote-perl  python3-xdg      libgitlab-api-v4-perl      libio-
> compress-brotli-perl  sopv-doc
>   licensecheck               strace           libsoap-lite-perl
> libnamespace-clean-perl
> ...
>
> Are those logical-or vertical bar in output intentional? Looks like a parsing
> bug to me, because of the column display the logical condition has lost context
> and does not make sense to show the user. If you want to show these in a
> meaningful way then after all the n-columns output of the simple non-logic-
> encumbered keys, have a single-column listing one-per-line of the more
> complicated keys.

I can understand how say

    A1 | A2 B C
    D E F

reads easier, but if you look at

    A B C1
    | C2 D

vs.

    A C1    D
    B |C2

or

    A   |C2
    B   D
    C1


It's not immediately clear one is better just because it wraps on
lines instead of columns; the alternatives were never attached
and always broken.

In fact, I believe the columnar format here is actually more
readable.
--

I was suggesting

A B C
|D E F
G H |I

should instead be:

A B E
F G
C|D
H|I

where the columnized output is for simple keys and the one-per-line keys follow with all the logic, not matching the alphanumeric sort anyways because they are complex

...and if it is known at runtime to indicate which the likely result of the complex key will be:

A B E
F G
C|D (D)
H|I (H)

or just hide the logic from the output but indicate when something is a complex result:

A B (D)
E F G
(H)

and maybe it is not anything important to show the user so both hide logic and don't trouble us with the details:

A B D
E F G
H

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