zypper recommends godot-bash-completion, why?

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1 
# zypper inr
Loading repository data...
Reading installed packages...
Resolving package dependencies...

The following 2 NEW packages are going to be installed:
  godot-bash-completion poppler-data

# zypper search --recommends-pkg godot-bash-completion
Loading repository data...
Reading installed packages...

S | Name  | Summary                                              | Type   
--+-------+------------------------------------------------------+--------
  | godot | Cross-Platform Game Engine with an Integrated Editor | package

poppler-data is listed because cups-filters is installed, but I could not find the reason godot-* is being recommended, since godot is not installed. Does anyone can explain? Or indicate another way to find the dependency? Thanks

2

Try


rpm -q --whatrecommends godot-bash-completion
3 
$ rpm -q --whatrecommends godot-bash-completion
no package recommends godot-bash-completion

$ rpm -q --whatrecommends poppler-data
libpoppler94-0.84.0-1.1.x86_64

$ zypper se libpoppler94-0.84.0-1.1.x86_64
Loading repository data...
Reading installed packages...

S | Name         | Type    | Version    | Arch   | Repository             
--+--------------+---------+------------+--------+------------------------
i | libpoppler94 | package | 0.84.0-1.1 | x86_64 | openSUSE-Tumbleweed-Oss
4

I tried

# zypper inr --debug-solver

The generated test case didn’t made it clear why, but returned that the package supplements another which is installed:

$ zypper if --supplements godot-bash-completion
Loading repository data...
Reading installed packages...


Information for package godot-bash-completion:
----------------------------------------------
Repository     : openSUSE-Tumbleweed-Oss               
Name           : godot-bash-completion                 
Version        : 3.2-1.1                               
Arch           : noarch                                
Vendor         : openSUSE                              
Installed Size : 81.7 KiB                              
Installed      : No                                    
Status         : not installed                         
Source package : godot-3.2-1.1.src                     
Summary        : Godot command line completion for Bash
Description    :                                       
    Bash command line completion support for godot, godot-headless,
    godot-runner and godot-server
Supplements    : [2]                                   
    bash-completion
    godot

bash-completion is installed, but the zypper docs doesn’t mention that supplements are included with the inr command. Not sure how to verify that though.

5

The full name of inr is install-new-recommends. For a description see: https://documentation.suse.com/sles/12-SP4/html/SLES-all/cha-sw-cl.html

 In addition to dependencies that must be fulfilled, some packages     “recommend” other packages. These recommended packages are     only installed if actually available and installable. In case recommended     packages were made available after the recommending package has been     installed (by adding additional packages or hardware), use the following     command:

sudo zypper install-new-recommends

 This command is very useful after plugging in a Web cam or Wi-Fi device. It     will install drivers for the device and related software, if available.     Drivers and related software are only installable if certain hardware     dependencies are fulfilled.
6 
erlangen:~ # zypper if --supplements godot-bash-completion
Loading repository data...
Reading installed packages...


Information for package godot-bash-completion:
----------------------------------------------
Repository     : Haupt-Repository (OSS)                
Name           : godot-bash-completion                 
Version        : 3.2-1.1                               
Arch           : noarch                                
Vendor         : openSUSE                              
Installed Size : 81.7 KiB                              
Installed      : No                                    
Status         : not installed                         
Source package : godot-3.2-1.1.src                     
Summary        : Godot command line completion for Bash
Description    :                                       
    Bash command line completion support for godot, godot-headless,
    godot-runner and godot-server
**Supplements    : [2]                                   
    bash-completion
    godot**

erlangen:~ #

Note: godot-bash-completion supplements bash-completion, but bash-completion does not recommend godot-bash-completion:

erlangen:~ # zypper if --recommends bash-completion
Loading repository data...
Reading installed packages...


Information for package bash-completion:
----------------------------------------
Repository     : Haupt-Repository (OSS)          
Name           : bash-completion                 
Version        : 2.10-2.1                        
Arch           : noarch                          
Vendor         : openSUSE                        
Installed Size : 851.9 KiB                       
Installed      : Yes (automatically)             
Status         : up-to-date                      
Source package : bash-completion-2.10-2.1.src    
Summary        : Programmable Completion for Bash
Description    :                                 
    bash-completion is a collection of shell functions that take advantage
    of the programmable completion feature of Bash 2.04 and later.
**Recommends     : ---                             **

erlangen:~ #
7

Do you have the go development language installed, or any related package?

Also,
It appears that it may be recommended but you didn’t install it, right?

As always, if you don’t need something you can uninstall the package…
Zypper should prevent you from borking your machine.

TSU

8

Also, because godot isn’t installed it wouldn’t be of any use. That’s the mistery.

Nope.

I didn’t install. Not that I need this package not to be installed, it’s a matter of learning how to interact with the system. I’ve added a lock to prevent installation anyways.

9

Note: godot-bash-completion supplements bash-completion, bash-completion is installed. Therefore zypper recommends installation of godot-bash-completion. :wink:

10

Depending on whatever you might mean by “supplements”
My guess is that this dependency probably needs to be fine-tuned and installed as a dependency in either the go developement language pattern or if there is such a thing as a dotnet go language (I’ve never heard of that), not as a BASH bash-completion dependency.

Perhaps a bug should be submitted for someone to evaluate?

TSU

11

From “man zypper”:

   info (if) [options] name...
       Displays detailed information about the specified packages. + For each specified package, zypper finds the best available version in defined repositories and shows information for this package.

…
–supplements
Show symbols the package supplements.
See also post #6.

12

From https://rpm.org/user_doc/dependencies.html:

On the other hand, if a package that is named foo or that Provides: foo is selected, and a package bar containing Supplements: foo” exists, then bar is also selected as long as doing so does not lead to unresolvable dependencies.

In other words, if you have packages A and B and you want to declare a weak relation between them A -> B, you can either specify it as package A containing Recommends: B or package B containing Supplements: A.

So the zypper inr command should install supplement packages. But why aren’t the other xyz-bash-completion installed?

I found this in the .spec for godot-bash-completion:

Supplements:    (%{name} and bash-completion)

All other packages are defined in this fashion:

Supplements:    packageand(%{name}:bash-completion)

The zypper info command presents them differently.

It seems that SUSE create the packageand to fulfill missing functionality in rpm: Libzypp/Dependencies - openSUSE Wiki

packageand(A:B). Usually used together with reverse dependencies, e.g. Supplements: packageand(A:B) proposes T only if both A and B are installed/to be installed.

But later rpm added the boolean and operator: https://rpm.org/user_doc/boolean_dependencies.html

  • and - requires all operands to be fulfilled for the term to be True.

So, it should evaluate to false because godot isn’t installed.

There’s certainly a bug somewhere.

13

I don’t agree, see: Libzypp/Dependencies - openSUSE Wiki

Reverse dependencies

Unlike the above mentioned dependencies, which are kind-of top-down, the following dependencies work the other way around. Read on.

  • Supplements: A reverse recommends. This resolvable will be installed if this capability is provided by an installed resolvable. The dependency resolver will install it. Uninstalling it is silently accepted.

Observed behavior is identical to described behavior: godot-bash-completion gets installed because it supplements bash-completion, which is already installed.

14

This assessment is incorrect because the package asks for both godot and bash-completion to supplement, using the and operator. The and operador is described in my previous message.

15

Package godot-bash-completion supplements both godot and bash-completion. However on my machine godot is not installed and bash-completion is installed. zypper install-new-recommends results in:


erlangen:~ # zypper inr 
Loading repository data...
Reading installed packages...
Resolving package dependencies...

The following 2 NEW packages are going to be installed:
  godot-bash-completion opencv3

2 new packages to install.
Overall download size: 1.4 MiB. Already cached: 0 B. After the operation, additional 10.3 MiB will be used.
Continue? [y/n/v/...? shows all options] (y): n
erlangen:~ #

When none of the supplemented packages is installed:

erlangen:~ # zypper inr 
Loading repository data...
Reading installed packages...
Resolving package dependencies...

The following 7 NEW packages are going to be installed:
  ModemManager-bash-completion bash-completion godot-bash-completion mbimcli-bash-completion opencv3 pulseaudio-bash-completion subversion-bash-completion

7 new packages to install.
Overall download size: 2.0 MiB. Already cached: 0 B. After the operation, additional 11.2 MiB will be used.
Continue? [y/n/v/...? shows all options] (y): 
Retrieving package bash-completion-2.10-2.1.noarch                                                                                                                                                                                        (1/7), 274.9 KiB (851.9 KiB unpacked)

...

(7/7) Installing: ModemManager-bash-completion-1.12.6-1.1.x86_64 ........................................................................................................................................................................................................[done]
erlangen:~ #
16

Weird. I suppose you have ModemManager and subversion installed, which would cause their *-bash-completion to be recommended the first time.

17

Yes, they are installed. You can have more fun with zypper. For that reason you are always prompted to proceed with your choice or abort.

18

It was indeed an issue with the package, turns out the fix was already published the day before I posted here because I didn’t refresh the repo :shame:.