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Code Issues Releases Activity

Simplify CandidateEvaluator.evaluate_link().

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This commit is contained in:
Chris Jerdonek 2019-05-08 20:07:39 -04:00
parent 6217335a41
commit c54e50f50b
2 changed files with 45 additions and 39 deletions
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80
src/pip/_internal/index.py
View file

@ -290,12 +290,15 @@ class CandidateEvaluator(object):
# type: (Wheel) -> bool
return wheel.supported(self._valid_tags)
def evaluate_link(self, link, search):
# type: (Link, Search) -> Optional[InstallationCandidate]
def _evaluate_link(self, link, search):
# type: (Link, Search) -> Tuple[bool, Optional[str]]
"""
Determine whether a link is a candidate for installation.
Returns an InstallationCandidate if so, otherwise None.
:return: A tuple (is_candidate, result), where `result` is (1) a
version string if `is_candidate` is True, and (2) if
`is_candidate` is False, an optional string to log the reason
the link fails to qualify.
"""
version = None
if link.egg_fragment:
@ -304,61 +307,43 @@ class CandidateEvaluator(object):
else:
egg_info, ext = link.splitext()
if not ext:
self._log_skipped_link(link, 'not a file')
return None
return (False, 'not a file')
if ext not in SUPPORTED_EXTENSIONS:
self._log_skipped_link(
link, 'unsupported archive format: %s' % ext,
)
return None
return (False, 'unsupported archive format: %s' % ext)
if "binary" not in search.formats and ext == WHEEL_EXTENSION:
self._log_skipped_link(
link, 'No binaries permitted for %s' % search.supplied,
)
return None
reason = 'No binaries permitted for %s' % search.supplied
return (False, reason)
if "macosx10" in link.path and ext == '.zip':
self._log_skipped_link(link, 'macosx10 one')
return None
return (False, 'macosx10 one')
if ext == WHEEL_EXTENSION:
try:
wheel = Wheel(link.filename)
except InvalidWheelFilename:
self._log_skipped_link(link, 'invalid wheel filename')
return None
return (False, 'invalid wheel filename')
if canonicalize_name(wheel.name) != search.canonical:
self._log_skipped_link(
link, 'wrong project name (not %s)' % search.supplied)
return None
reason = 'wrong project name (not %s)' % search.supplied
return (False, reason)
if not self._is_wheel_supported(wheel):
self._log_skipped_link(
link, 'it is not compatible with this Python')
return None
return (False, 'it is not compatible with this Python')
version = wheel.version
# This should be up by the search.ok_binary check, but see issue 2700.
if "source" not in search.formats and ext != WHEEL_EXTENSION:
self._log_skipped_link(
link, 'No sources permitted for %s' % search.supplied,
)
return None
return (False, 'No sources permitted for %s' % search.supplied)
if not version:
version = _egg_info_matches(egg_info, search.canonical)
if not version:
self._log_skipped_link(
link, 'Missing project version for %s' % search.supplied)
return None
return (False, 'Missing project version for %s' % search.supplied)
match = self._py_version_re.search(version)
if match:
version = version[:match.start()]
py_version = match.group(1)
if py_version != sys.version[:3]:
self._log_skipped_link(
link, 'Python version is incorrect')
return None
return (False, 'Python version is incorrect')
try:
support_this_python = check_requires_python(
link.requires_python, version_info=sys.version_info[:3],
@ -372,10 +357,29 @@ class CandidateEvaluator(object):
logger.debug("The package %s is incompatible with the python "
"version in use. Acceptable python versions are: %s",
link, link.requires_python)
return None
# Return None for the reason text to suppress calling
# _log_skipped_link().
return (False, None)
logger.debug('Found link %s, version: %s', link, version)
return InstallationCandidate(search.supplied, version, link)
return (True, version)
def get_install_candidate(self, link, search):
# type: (Link, Search) -> Optional[InstallationCandidate]
"""
If the link is a candidate for install, convert it to an
InstallationCandidate and return it. Otherwise, return None.
"""
is_candidate, result = self._evaluate_link(link, search=search)
if not is_candidate:
if result:
self._log_skipped_link(link, reason=result)
return None
return InstallationCandidate(
search.supplied, location=link, version=result,
)
def _sort_key(self, candidate):
# type: (InstallationCandidate) -> CandidateSortingKey
@ -776,7 +780,8 @@ class PackageFinder(object):
This checks index_urls and find_links.
All versions found are returned as an InstallationCandidate list.
See evaluate_link() for details on which files are accepted
See CandidateEvaluator._evaluate_link() for details on which files
are accepted.
"""
index_locations = self._get_index_urls_locations(project_name)
index_file_loc, index_url_loc = self._sort_locations(index_locations)
@ -976,7 +981,8 @@ class PackageFinder(object):
# type: (...) -> List[InstallationCandidate]
result = []
for link in self._sort_links(links):
candidate = self.candidate_evaluator.evaluate_link(link, search)
candidate = self.candidate_evaluator.get_install_candidate(
link, search)
if candidate is not None:
result.append(candidate)
return result

4
tests/unit/test_finder.py
View file

@ -489,7 +489,7 @@ class TestCandidateEvaluator(object):
canonical=self.canonical_name,
formats=['source', 'binary'],
)
result = self.evaluator.evaluate_link(link, search)
result = self.evaluator.get_install_candidate(link, search)
expected = InstallationCandidate(self.search_name, self.version, link)
assert result == expected, result
@ -510,7 +510,7 @@ class TestCandidateEvaluator(object):
canonical=self.canonical_name,
formats=['source', 'binary'],
)
result = self.evaluator.evaluate_link(link, search)
result = self.evaluator.get_install_candidate(link, search)
assert result is None, result