how to find (ALL) dependencies of a package

[Anonymous]

What actually is the method to find all the dependencies of a package.

$ apt show <packagename>

here’s an example of its output for package “mirage”
(as found in antiX16, which I’m revisiting today):

$ apt show mirage
Package: mirage
Status: install ok installed
Priority: extra
Section: graphics
Installed-Size: 551 kB
Maintainer: Debian QA Group <packages@qa.debian.org>
Version: 0.9.5.1-3
Depends: libc6 (>= 2.2.5), libx11-6, python (>= 2.7), python (<< 2.8), python-gtk2
Suggests: gimp, imagemagick, menu
Homepage: hxxp: ========= skidoo deleted (it pointed to a defunct berlios.de page)
Download-Size: unknown
APT-Manual-Installed: yes
APT-Sources: /var/lib/dpkg/status
Description: fast and simple GTK+ image viewer
Mirage is ideal for users who wish to keep their computers
lean while still having a clean image viewer.
.
Features:
* Supports png, jpg, svg, xpm, gif, bmp, tiff, and others
* Preloading to navigate faster through images (optional)
* Thumbnail pane for quick navigation
* Slideshow and fullscreen mode
* Rotating, zooming, flipping, resizing, and cropping
* Custom user actions
* Screenshot

In order to avoid unnecessary bloat, The default antiX apt configuration is set to only consider “Depends” items.

Depends: ~= must have, cannot function without
Recommends: ~= wishy-washy, indeterminate what exact this “means” (subject to packager’s [in]discretion)
Suggests: ~= indeterminate (open to packager’s discretion)
Declaring relationships between packages
: Binary Dependencies – Depends, Recommends, Suggests, Enhances, Pre-Depends

What actually is the method to find _ALL_ the dependencies of a package.

Because a typical user probably seldom ever “needs” to see/know
pkg A depends on B, which in turn, depends on CDE…
the specific utility for viewing this in-depth info might not be pre-installed in antiX, so:
$ sudo apt install apt-rdepends
$ man rdepends

reusing “mirage” as a quick example
$ apt-rdepends mirage
whoops, I won’t paste the output (its output was 535 lines long!)

a related in-depth utility:
$ sudo apt install apt-file
$ man apt-file

[Member ex_Koo]

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I had some more to add but got this..

A potentially unsafe operation has been detected in your request to this site

Your access to this service has been limited. (HTTP response code 403)

If you think you have been blocked in error, contact the owner of this site for assistance.
Block Technical Data
Block Reason: A potentially unsafe operation has been detected in your request to this site
Time: Sat, 5 Sep 2020 9:44:42 GMT

[Member Xecure]

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ex_Koo wrote:

Your access to this service has been limited. (HTTP response code 403)

If you think you have been blocked in error, contact the owner of this site for assistance.
Block Technical Data
Block Reason: A potentially unsafe operation has been detected in your request to this site
Time: Sat, 5 Sep 2020 9:44:42 GMT

This happens to me when I directly add “html like” tags to the post. When adding code without the code tags, for example.

Using apt-cache tools:
Single level of Dependencies (only direct dependencies):
apt-cache depends <packagename> --no-recommends --no-suggests --no-conflicts --no-breaks --no-replaces --no-enhances
Single level Dependencies and Recommended packages:
apt-cache depends <packagename> --no-suggests --no-conflicts --no-breaks --no-replaces --no-enhances
ALL recursive dependencies:
apt-cache depends <packagename> --recurse --no-recommends --no-suggests --no-conflicts --no-breaks --no-replaces --no-enhances
Some dependencies without being sure they are all that are needed: use apt-rdepends

antiX Live system enthusiast.
General Live Boot Parameters for antiX.

[Member anilkagi]

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Thanks @Skidoo for the compassionate HowTo.

@Xecure, those filter codes are sweet. Beauty. Icing on the cake.

@Koo, hope your issue is resolved.

I wanted this since long. It helps a lot.

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