dependency issue: python-mistune

[atomGit]

arch/manjaro linux

i have python-mistune v2.0.4-1 installed and...

$ lektor --help
Traceback (most recent call last):
  File "/usr/lib/python3.10/site-packages/pkg_resources/__init__.py", line 581, in _build_master
    ws.require(__requires__)
  File "/usr/lib/python3.10/site-packages/pkg_resources/__init__.py", line 909, in require
    needed = self.resolve(parse_requirements(requirements))
  File "/usr/lib/python3.10/site-packages/pkg_resources/__init__.py", line 800, in resolve
    raise VersionConflict(dist, req).with_context(dependent_req)
pkg_resources.ContextualVersionConflict: (mistune 2.0.4 (/usr/lib/python3.10/site-packages), Requirement.parse('mistune<2,>=0.7.0'), {'Lektor'})

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/bin/lektor", line 33, in <module>
    sys.exit(load_entry_point('Lektor==3.2.0', 'console_scripts', 'lektor')())
  File "/usr/bin/lektor", line 25, in importlib_load_entry_point
    return next(matches).load()
  File "/usr/lib/python3.10/importlib/metadata/__init__.py", line 171, in load
    module = import_module(match.group('module'))
  File "/usr/lib/python3.10/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1050, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1006, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 688, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 883, in exec_module
  File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
  File "/usr/lib/python3.10/site-packages/lektor/cli.py", line 8, in <module>
    import pkg_resources
  File "/usr/lib/python3.10/site-packages/pkg_resources/__init__.py", line 3260, in <module>
    def _initialize_master_working_set():
  File "/usr/lib/python3.10/site-packages/pkg_resources/__init__.py", line 3234, in _call_aside
    f(*args, **kwargs)
  File "/usr/lib/python3.10/site-packages/pkg_resources/__init__.py", line 3272, in _initialize_master_working_set
    working_set = WorkingSet._build_master()
  File "/usr/lib/python3.10/site-packages/pkg_resources/__init__.py", line 583, in _build_master
    return cls._build_from_requirements(__requires__)
  File "/usr/lib/python3.10/site-packages/pkg_resources/__init__.py", line 596, in _build_from_requirements
    dists = ws.resolve(reqs, Environment())
  File "/usr/lib/python3.10/site-packages/pkg_resources/__init__.py", line 795, in resolve
    raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The 'mistune<2,>=0.7.0' distribution was not found and is required by Lektor

[Jeff Dairiki]

Lektor 3.2 is really quite old.

You'll have better luck running Lektor from a virtual environment. Pipx might make this easier.

That said, Lektor 3.3.x (the current stable branch) does not work with mistune 2.

The code in the master branch does. There are pre-releases of this on PyPI. The latest, as of now, is lektor==3.4.0b4.
(You can install this by explicitly specifying the revision to pip, or by giving pip the --pre option.)

[atomGit]

pip says no such option: --pre

and i'm not seeing any other option that would deal with versions

[Jeff Dairiki]

pip says no such option: --pre

and i'm not seeing any other option that would deal with versions

@atomGit
--pre is an option to the install subcommand of pip

pip install --pre lektor

Docs here: https://pip.pypa.io/en/stable/cli/pip_install/#cmdoption-pre

Alternatively, you can specify the exact version to install:

pip install lektor==3.4.0b4

[atomGit]

thanks