tests/filterpyflakes.py

subrepo: add test for Windows relative-ish path with drive letter

Matt Harbison pointed out that Windows had some weird path syntax.
Fortunately it's rejected appropriately by pathauditor, so we're safe.
Let's test the behavior as we have a special handling for Windows drive
letters.

This patch includes a basic example. Maybe we'll need to extend the test
case further, but writing such tests on Linux isn't easy.

#!/usr/bin/env python

# Filter output by pyflakes to control which warnings we check

from __future__ import absolute_import, print_function

import re
import sys

lines = []
for line in sys.stdin:
    # We blacklist tests that are too noisy for us
    pats = [
        r"undefined name 'WindowsError'",
        r"redefinition of unused '[^']+' from line",
        # for cffi, allow re-exports from pure.*
        r"cffi/[^:]*:.*\bimport \*' used",
        r"cffi/[^:]*:.*\*' imported but unused",
    ]

    keep = True
    for pat in pats:
        if re.search(pat, line):
            keep = False
            break # pattern matches
    if keep:
        fn = line.split(':', 1)[0]
        f = open(fn)
        data = f.read()
        f.close()
        if 'no-' 'check-code' in data:
            continue
        lines.append(line)

for line in lines:
    sys.stdout.write(line)
print()