Local file check broken

[Flamefire]

The local file check doesn't really work well for us. Please check the following suggestions below:

First the following line is superflous and actually has the expanduser at the wrong place breaking the passing of ~/... paths:

linkchecker-markdown/src/linkcheckmd/base.py

Line 51 in bfbe3ad

path = Path(path).resolve().expanduser() # must have .resolve()

Then our markdownfiles have relative links like [Request](req_resources.md) which are completely ignored (reported as "not found") by the linkchecker.

The check at

linkchecker-markdown/src/linkcheckmd/base.py

Lines 63 to 64 in bfbe3ad

	if {"/", "."}.intersection(stem):
	continue

and

linkchecker-markdown/src/linkcheckmd/base.py

Lines 68 to 69 in bfbe3ad

	if {"/", "."}.intersection(stem):
	continue

is needlessly duplicated.
However I don't understand its purpose: Why disallow links with slashes and dots, e.g. the one above?

Why doesn't

linkchecker-markdown/src/linkcheckmd/base.py

Lines 71 to 75 in bfbe3ad

	if not (
	(path / (stem + ext)).is_file()
	or (path.parent / (stem + ext)).is_file()
	or (path / stem).is_dir()
	):

check for (path / stem).is_file()?

And finally: The list is only printed, but does not affect the return code. See

linkchecker-markdown/src/linkcheckmd/base.py

Line 32 in bfbe3ad

print(missing_file)

[lhanson]

Relative links being ignored is a dealbreaker for me.