def package_finder(argv):
"""Return a PackageFinder respecting command-line options.
:arg argv: Everything after the subcommand
"""
# We instantiate an InstallCommand and then use some of its private
# machinery--its arg parser--for our own purposes, like a virus. This
# approach is portable across many pip versions, where more fine-grained
# ones are not. Ignoring options that don't exist on the parser (for
# instance, --use-wheel) gives us a straightforward method of backward
# compatibility.
try:
command = InstallCommand()
except TypeError:
# This is likely pip 1.3.0's "__init__() takes exactly 2 arguments (1
# given)" error. In that version, InstallCommand takes a top=level
# parser passed in from outside.
from pip.baseparser import create_main_parser
command = InstallCommand(create_main_parser())
# The downside is that it essentially ruins the InstallCommand class for
# further use. Calling out to pip.main() within the same interpreter, for
# example, would result in arguments parsed this time turning up there.
# Thus, we deepcopy the arg parser so we don't trash its singletons. Of
# course, deepcopy doesn't work on these objects, because they contain
# uncopyable regex patterns, so we pickle and unpickle instead. Fun!
options, _ = loads(dumps(command.parser)).parse_args(argv)
# Carry over PackageFinder kwargs that have [about] the same names as
# options attr names:
possible_options = [
"find_links",
"use_wheel",
"allow_external",
"allow_unverified",
"allow_all_external",
("allow_all_prereleases", "pre"),
"process_dependency_links",
]
kwargs = {}
for option in possible_options:
kw, attr = option if isinstance(option, tuple) else (option, option)
value = getattr(options, attr, MARKER)
if value is not MARKER:
kwargs[kw] = value
# Figure out index_urls:
index_urls = [options.index_url] + options.extra_index_urls
if options.no_index:
index_urls = []
index_urls += getattr(options, "mirrors", [])
# If pip is new enough to have a PipSession, initialize one, since
# PackageFinder requires it:
if hasattr(command, "_build_session"):
kwargs["session"] = command._build_session(options)
return PackageFinder(index_urls=index_urls, **kwargs)
def package_finder(argv):
"""Return a PackageFinder respecting command-line options.
:arg argv: Everything after the subcommand
"""
# We instantiate an InstallCommand and then use some of its private
# machinery--its arg parser--for our own purposes, like a virus. This
# approach is portable across many pip versions, where more fine-grained
# ones are not. Ignoring options that don't exist on the parser (for
# instance, --use-wheel) gives us a straightforward method of backward
# compatibility.
try:
command = InstallCommand()
except TypeError:
# This is likely pip 1.3.0's "__init__() takes exactly 2 arguments (1
# given)" error. In that version, InstallCommand takes a top=level
# parser passed in from outside.
from pip.baseparser import create_main_parser
command = InstallCommand(create_main_parser())
# The downside is that it essentially ruins the InstallCommand class for
# further use. Calling out to pip.main() within the same interpreter, for
# example, would result in arguments parsed this time turning up there.
# Thus, we deepcopy the arg parser so we don't trash its singletons. Of
# course, deepcopy doesn't work on these objects, because they contain
# uncopyable regex patterns, so we pickle and unpickle instead. Fun!
options, _ = loads(dumps(command.parser)).parse_args(argv)
# Carry over PackageFinder kwargs that have [about] the same names as
# options attr names:
possible_options = [
'find_links', 'use_wheel', 'allow_external',
'allow_unverified', 'allow_all_external',
('allow_all_prereleases', 'pre'), 'process_dependency_links'
]
kwargs = {}
for option in possible_options:
kw, attr = option if isinstance(option, tuple) else (option, option)
value = getattr(options, attr, MARKER)
if value is not MARKER:
kwargs[kw] = value
# Figure out index_urls:
index_urls = [options.index_url] + options.extra_index_urls
if options.no_index:
index_urls = []
index_urls += getattr(options, 'mirrors', [])
# If pip is new enough to have a PipSession, initialize one, since
# PackageFinder requires it:
if hasattr(command, '_build_session'):
kwargs['session'] = command._build_session(options)
return PackageFinder(index_urls=index_urls, **kwargs)
