Empty tool.bumpversion.files section in pyproject.toml causes stack trace.

[rob-smallshire]

If pyproject.toml contains an empty [[tool.bumpversion.files]] section, the following stack trace results,

Traceback (most recent call last):
  File "/root/.cache/uv/archive-v0/4wZfeXLnnHN7-t_-H-Y3f/bin/bump-my-version", line 12, in <module>
    sys.exit(cli())
             ^^^^^
  File "/root/.cache/uv/archive-v0/4wZfeXLnnHN7-t_-H-Y3f/lib/python3.11/site-packages/rich_click/rich_command.py", line 367, in __call__
    return super().__call__(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/root/.cache/uv/archive-v0/4wZfeXLnnHN7-t_-H-Y3f/lib/python3.11/site-packages/click/core.py", line 1161, in __call__
    return self.main(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/root/.cache/uv/archive-v0/4wZfeXLnnHN7-t_-H-Y3f/lib/python3.11/site-packages/rich_click/rich_command.py", line 152, in main
    rv = self.invoke(ctx)
         ^^^^^^^^^^^^^^^^
  File "/root/.cache/uv/archive-v0/4wZfeXLnnHN7-t_-H-Y3f/lib/python3.11/site-packages/click/core.py", line 1697, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/root/.cache/uv/archive-v0/4wZfeXLnnHN7-t_-H-Y3f/lib/python3.11/site-packages/click/core.py", line 1443, in invoke
    return ctx.invoke(self.callback, **ctx.params)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/root/.cache/uv/archive-v0/4wZfeXLnnHN7-t_-H-Y3f/lib/python3.11/site-packages/click/core.py", line 788, in invoke
    return __callback(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/root/.cache/uv/archive-v0/4wZfeXLnnHN7-t_-H-Y3f/lib/python3.11/site-packages/bumpversion/cli.py", line 307, in bump
    do_bump(version_part, new_version, config, found_config_file, dry_run)
  File "/root/.cache/uv/archive-v0/4wZfeXLnnHN7-t_-H-Y3f/lib/python3.11/site-packages/bumpversion/bump.py", line 109, in do_bump
    modify_files(configured_files, version, next_version, ctx, dry_run)
  File "/root/.cache/uv/archive-v0/4wZfeXLnnHN7-t_-H-Y3f/lib/python3.11/site-packages/bumpversion/files.py", line 269, in modify_files
    f.make_file_change(current_version, new_version, context, dry_run)
  File "/root/.cache/uv/archive-v0/4wZfeXLnnHN7-t_-H-Y3f/lib/python3.11/site-packages/bumpversion/files.py", line 182, in make_file_change
    if not os.path.exists(self.file_change.filename):
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen genericpath>", line 19, in exists
TypeError: stat: path should be string, bytes, os.PathLike or integer, not NoneType

[coordt]

Ooops! Guess I missed a test case. Thanks for bringing this up.