Re: Python Site Package Syntax Runtime Error

[Maxime Devos]

Antwane Mason schreef op di 07-09-2021 om 13:39 [-0400]:
> Has anyone come across the following runtime error when running a python-based
> application in guix? I'm wondering if something went wrong during the package 
> build
>  for python-onlykey-agent that messed up the PYTHONPATH export for the 
> runtime.  I should
>  note that python-onlykey-agent is a program that I have packaged to 
> eventually submit to guix.
> 
> --8<---------------cut here---------------start------------->8---
> export 
> PYTHONPATH="...:/gnu/store/wand0zrwwnds6x636746116cfh3sy50k-python-pyopenssl-20.0.0/lib/python3.8/site-packages${PYTHONPATH:+:}$PYTHONPATH"
> 
> SyntaxError: invalid syntax
> --8<---------------cut here---------------end--------------->8---
> Here is the entire stack trace for reference.
> 
> --8<---------------cut here---------------start------------->8---
> antwane@wmguix ~$ onlykey-agent git@github.com
> Traceback (most recent call last):
>   File 
> "/gnu/store/s2w1lq80x9vcwp5382kn98f5pi2k4b7b-python-onlykey-agent-1.1.12/bin/.onlykey-agent-real",
>  line 11, in <module>
>     load_entry_point('onlykey-agent==1.1.12', 'console_scripts', 
> 'onlykey-agent')()
>   File 
> "/gnu/store/sd2ic7bpv8fx3imy1j8xcjclx71sv6q0-python-3.8.2/lib/python3.8/site-packages/pkg_resources/__init__.py",
>  line 489, in load_entry_point
>     return get_distribution(dist).load_entry_point(group, name)
>   File 
> "/gnu/store/sd2ic7bpv8fx3imy1j8xcjclx71sv6q0-python-3.8.2/lib/python3.8/site-packages/pkg_resources/__init__.py",
>  line 2852, in load_entry_point
>     return ep.load()
>   File 
> "/gnu/store/sd2ic7bpv8fx3imy1j8xcjclx71sv6q0-python-3.8.2/lib/python3.8/site-packages/pkg_resources/__init__.py",
>  line 2443, in load
>     return self.resolve()
>   File 
> "/gnu/store/sd2ic7bpv8fx3imy1j8xcjclx71sv6q0-python-3.8.2/lib/python3.8/site-packages/pkg_resources/__init__.py",
>  line 2449, in resolve
>     module = __import__(self.module_name, fromlist=['__name__'], level=0)
>   File 
> "/gnu/store/s2w1lq80x9vcwp5382kn98f5pi2k4b7b-python-onlykey-agent-1.1.12/bin/onlykey_agent.py",
>  line 2

Why is "onlykey_agent.py" in "bin"?  If it is not a stand-alone library,
shouldn't it be in "share" or "lib"?

Anyway, to prevent onlykey_agent.py from being wrapped, you can replace
the 'wrap' phase with a custom 'wrap' phase adjusted for onlykey-agent 
pecularities:

(package
  (name "python-onlykey-agent")
  ...
  (arguments
    `(#:phases
      (modify-phases %standard-phases
        (replace 'wrap
          (lambda* (#:key outputs #:allow-other-keys)
            (define bin (string-append (assoc-ref outputs "out") "/bin")
            ;; Replace ??? with something appropriate for onlykey-agent 
            (wrap-program (string-append bin "/onlykey-agent)
               `("PYTHONPATH" '??? '???))
            'maybe-wrap-other-things
            '???))))))

Greetings,
Maxime.

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