On Sun, Feb 02, 2025 at 07:26:53AM +1100, Matthew Fernandez wrote:
> Hi mentors,
> 
> I was previously instructed to remove python3 from my package’s suggests
> because it is always installed.¹ However when doing this and now trying to
> package a new version, Lintian is upset:
> 
>   E: rumur: python3-script-but-no-python3-dep python3 (does not satisfy
> python3:any | python3-minimal:any) [usr/bin/rumur-run]
>   N:
>   N:   Packages with Python3 scripts should depend on the package python3.
> Those with scripts that specify a specific version of Python3 must depend,
> recommend
>   N:   or suggest on that version of Python3 (exactly).
>   N:
>   N:   For example, if a script in the package uses #!/usr/bin/python3, the
> package needs a dependency on python3. If a script uses
> #!/usr/bin/python3.8, the
>   N:   package needs a dependency on python3.8. A dependency on python (>=
> 3.8) is not correct, since later versions of Python may not provide the
>   N:   /usr/bin/python3.8 binary.
>   N:
>   N:   If you are using debhelper, adding ${python3:Depends} to the Depends
> field and ensuring dh_python3 is run during the build should take care of
> adding the
>   N:   correct dependency.
>   N:
>   N:   In some cases a weaker relationship, such as Suggests or Recommends,
> will be more appropriate.
>   N:
>   N:   Visibility: error
>   N:   Show-Always: no
>   N:   Check: scripts
> 
> The Lintian advice appears to contradict mentor instructions. What is the
> right approach here? Is python3 meant to appear somewhere else as a weak
> dep?

The mentor instructions are wrong. But why is it Suggests and not Depends?
Is rumur-run unlikely to be used?

-- 
WBR, wRAR

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