CustomFieldAdminPlugin pip installation error

[Jon McGlone]

Running Trac 1.6 on a Windows 11 machine. Trac runs without any issues. I've installed several plugins without any issues. 

Yes, I know, Windows, it is the environment I'm forced to use.

However when I try to install the CustomFieldAdminPlugin using the command:

    pip install svn+https://trac-hacks.org/svn/customfieldadminplugin/1.2

I get the following errors:

C:\Users\jm\Downloads\Trac_Plugins>pip install svn+https://trac-hacks.org/svn/customfieldadminplugin/1.2
Collecting svn+https://trac-hacks.org/svn/customfieldadminplugin/1.2
  Checking out https://trac-hacks.org/svn/customfieldadminplugin/1.2 to C:\Users\jm\AppData\Local\Temp\pip-req-build-xdp5ppa1
  Running command svn checkout --quiet --force-interactive https://trac-hacks.org/svn/customfieldadminplugin/1.2 'C:\Users\jm\AppData\Local\Temp\pip-req-build-xdp5ppa1'
  Installing build dependencies ... done
  Getting requirements to build wheel ... error
  error: subprocess-exited-with-error

  × Getting requirements to build wheel did not run successfully.
  │ exit code: 1
  ╰─> [20 lines of output]
      Traceback (most recent call last):
        File "C:\Python311\Lib\site-packages\pip\_vendor\pyproject_hooks\_in_process\_in_process.py", line 389, in <module>
          main()
        File "C:\Python311\Lib\site-packages\pip\_vendor\pyproject_hooks\_in_process\_in_process.py", line 373, in main
          json_out["return_val"] = hook(**hook_input["kwargs"])
                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        File "C:\Python311\Lib\site-packages\pip\_vendor\pyproject_hooks\_in_process\_in_process.py", line 143, in get_requires_for_build_wheel
          return hook(config_settings)
                 ^^^^^^^^^^^^^^^^^^^^^
        File "C:\Users\jm\AppData\Local\Temp\pip-build-env-x8arqra6\overlay\Lib\site-packages\setuptools\build_meta.py", line 333, in get_requires_for_build_wheel
          return self._get_build_requires(config_settings, requirements=[])
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        File "C:\Users\jm\AppData\Local\Temp\pip-build-env-x8arqra6\overlay\Lib\site-packages\setuptools\build_meta.py", line 301, in _get_build_requires
          self.run_setup()
        File "C:\Users\jm\AppData\Local\Temp\pip-build-env-x8arqra6\overlay\Lib\site-packages\setuptools\build_meta.py", line 520, in run_setup
          super().run_setup(setup_script=setup_script)
        File "C:\Users\jm\AppData\Local\Temp\pip-build-env-x8arqra6\overlay\Lib\site-packages\setuptools\build_meta.py", line 317, in run_setup
          exec(code, locals())
        File "<string>", line 5, in <module>
      ModuleNotFoundError: No module named 'trac'
      [end of output]

  note: This error originates from a subprocess, and is likely not a problem with pip.
ERROR: Failed to build 'svn+https://trac-hacks.org/svn/customfieldadminplugin/1.2' when getting requirements to build wheel

Can't figure out why this plugin installation is failing when all the other plugins I use install without issue.

Thanks,

-J

[Jun Omae]

Try --no-build-isolation option for pip install.

E.g.

pip install --no-build-isolation 

svn+https://trac-hacks.org/svn/customfieldadminplugin/1.2

Jun Omae <jun...@gmail.com> (大前 潤)

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[Jon McGlone]

Thank you Jun, that did the trick!

-J