setup.py: avoid requiring pip._internal.req.

pip._internal.req is not always available. Instead we parse requirements.txt by hand.

Author: julian-smith-artifex-com

setup.py

@@ -28,19 +28,11 @@ def load_long_description(fname):
 
 def load_requirements(fname):
  '''Load requirements.'''
- try:
- # pip >= 10.0
- from pip._internal.req import parse_requirements
- except ImportError:
- # pip < 10.0
- from pip.req import parse_requirements
-
- reqs = parse_requirements(fname, session=False)
- try:
- requirements = [str(ir.requirement) for ir in reqs]
- except AttributeError:
- requirements = [str(ir.req) for ir in reqs]
- return requirements
+ ret = list()
+ with open(fname) as f:
+ for line in f:
+ ret.append(line)
+ return ret
 
 
 setup(