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- 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]
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