PYDIST_RE and REQUIRES_RE are mismatched, which makes sensible_pname
return weird results for requires specifications on Python distributions
with dashed names.

Filter results with Python regexes, avoiding a shell in subprocess.

Examples:
• python3 /usr/share/dh-python/dhpython/pydist.py mako
• python3 /usr/share/dh-python/dhpython/pydist.py ./requirements.txt
• IMPL=cpython2 python3 /usr/share/dh-python/dhpython/pydist.py starlette parso

Nicolas Dandrimont authored 6 years ago and Piotr Ożarowski committed 6 years ago

This adds support for ~= version specifiers as proposed in
https://www.python.org/dev/peps/pep-0440/#compatible-release

this will not be used for now (current architecture needs to be passed
to this function), but it will fix a failure where dependency was given
for specific achitectures only (and "None" architecture wasn't available)

i.e. do not modify source files (fixes p1otr/pypi2deb#1)

Dependencies are generated only if given requirement is available in
dist_fallback file (generated at dh-python's build time) or if it's
available at build time (hint: Build-Depends)

this is used in egg-info file's Requires line(s)

based on python3-defaults and python-defaults packages