Посмотрев некоторое время на код pip, похоже, что код, отвечающий за поиск пакетов, можно найти в классе PackageFinder в pip.index.Его метод find_requirement ищет версии InstallRequirement, но, к сожалению, возвращает только самую последнюю версию.
Приведенный ниже код является почти копией оригинальной функции в формате 1: 1, с возвратом в строке 114, изменяющим все версии.
Скрипт ожидает одно имя пакета как первый и единственный аргументи возвращает все версии.
http://pastebin.com/axzdUQhZ
Я не могу гарантировать правильность, поскольку я не знаком с кодом пипса. Но, надеюсь, это поможет.
Пример вывода
$ python test.py pip
Versions of pip
0.8.2
0.8.1
0.8
0.7.2
0.7.1
0.7
0.6.3
0.6.2
0.6.1
0.6
0.5.1
0.5
0.4
0.3.1
0.3
0.2.1
0.2 dev
Код:
import posixpath
import pkg_resources
import sys
from pip.download import url_to_path
from pip.exceptions import DistributionNotFound
from pip.index import PackageFinder, Link
from pip.log import logger
from pip.req import InstallRequirement
from pip.util import Inf
class MyPackageFinder(PackageFinder):
def find_requirement(self, req, upgrade):
url_name = req.url_name
# Only check main index if index URL is given:
main_index_url = None
if self.index_urls:
# Check that we have the url_name correctly spelled:
main_index_url = Link(posixpath.join(self.index_urls[0], url_name))
# This will also cache the page, so it's okay that we get it again later:
page = self._get_page(main_index_url, req)
if page is None:
url_name = self._find_url_name(Link(self.index_urls[0]), url_name, req) or req.url_name
# Combine index URLs with mirror URLs here to allow
# adding more index URLs from requirements files
all_index_urls = self.index_urls + self.mirror_urls
def mkurl_pypi_url(url):
loc = posixpath.join(url, url_name)
# For maximum compatibility with easy_install, ensure the path
# ends in a trailing slash. Although this isn't in the spec
# (and PyPI can handle it without the slash) some other index
# implementations might break if they relied on easy_install's behavior.
if not loc.endswith('/'):
loc = loc + '/'
return loc
if url_name is not None:
locations = [
mkurl_pypi_url(url)
for url in all_index_urls] + self.find_links
else:
locations = list(self.find_links)
locations.extend(self.dependency_links)
for version in req.absolute_versions:
if url_name is not None and main_index_url is not None:
locations = [
posixpath.join(main_index_url.url, version)] + locations
file_locations, url_locations = self._sort_locations(locations)
locations = [Link(url) for url in url_locations]
logger.debug('URLs to search for versions for %s:' % req)
for location in locations:
logger.debug('* %s' % location)
found_versions = []
found_versions.extend(
self._package_versions(
[Link(url, '-f') for url in self.find_links], req.name.lower()))
page_versions = []
for page in self._get_pages(locations, req):
logger.debug('Analyzing links from page %s' % page.url)
logger.indent += 2
try:
page_versions.extend(self._package_versions(page.links, req.name.lower()))
finally:
logger.indent -= 2
dependency_versions = list(self._package_versions(
[Link(url) for url in self.dependency_links], req.name.lower()))
if dependency_versions:
logger.info('dependency_links found: %s' % ', '.join([link.url for parsed, link, version in dependency_versions]))
file_versions = list(self._package_versions(
[Link(url) for url in file_locations], req.name.lower()))
if not found_versions and not page_versions and not dependency_versions and not file_versions:
logger.fatal('Could not find any downloads that satisfy the requirement %s' % req)
raise DistributionNotFound('No distributions at all found for %s' % req)
if req.satisfied_by is not None:
found_versions.append((req.satisfied_by.parsed_version, Inf, req.satisfied_by.version))
if file_versions:
file_versions.sort(reverse=True)
logger.info('Local files found: %s' % ', '.join([url_to_path(link.url) for parsed, link, version in file_versions]))
found_versions = file_versions + found_versions
all_versions = found_versions + page_versions + dependency_versions
applicable_versions = []
for (parsed_version, link, version) in all_versions:
if version not in req.req:
logger.info("Ignoring link %s, version %s doesn't match %s"
% (link, version, ','.join([''.join(s) for s in req.req.specs])))
continue
applicable_versions.append((link, version))
applicable_versions = sorted(applicable_versions, key=lambda v: pkg_resources.parse_version(v[1]), reverse=True)
existing_applicable = bool([link for link, version in applicable_versions if link is Inf])
if not upgrade and existing_applicable:
if applicable_versions[0][1] is Inf:
logger.info('Existing installed version (%s) is most up-to-date and satisfies requirement'
% req.satisfied_by.version)
else:
logger.info('Existing installed version (%s) satisfies requirement (most up-to-date version is %s)'
% (req.satisfied_by.version, applicable_versions[0][1]))
return None
if not applicable_versions:
logger.fatal('Could not find a version that satisfies the requirement %s (from versions: %s)'
% (req, ', '.join([version for parsed_version, link, version in found_versions])))
raise DistributionNotFound('No distributions matching the version for %s' % req)
if applicable_versions[0][0] is Inf:
# We have an existing version, and its the best version
logger.info('Installed version (%s) is most up-to-date (past versions: %s)'
% (req.satisfied_by.version, ', '.join([version for link, version in applicable_versions[1:]]) or 'none'))
return None
if len(applicable_versions) > 1:
logger.info('Using version %s (newest of versions: %s)' %
(applicable_versions[0][1], ', '.join([version for link, version in applicable_versions])))
return applicable_versions
if __name__ == '__main__':
req = InstallRequirement.from_line(sys.argv[1], None)
finder = MyPackageFinder([], ['http://pypi.python.org/simple/'])
versions = finder.find_requirement(req, False)
print 'Versions of %s' % sys.argv[1]
for v in versions:
print v[1]