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"""Check PEP compliance of metadata."""
from packaging import logger
from packaging.command.cmd import Command
from packaging.errors import PackagingSetupError
from packaging.util import resolve_name
class check(Command):
description = "check PEP compliance of metadata"
user_options = [('metadata', 'm', 'Verify metadata'),
('all', 'a',
('runs extended set of checks')),
('strict', 's',
'Will exit with an error if a check fails')]
boolean_options = ['metadata', 'all', 'strict']
def initialize_options(self):
"""Sets default values for options."""
self.all = False
self.metadata = True
self.strict = False
self._warnings = []
def finalize_options(self):
pass
def warn(self, msg, *args):
"""Wrapper around logging that also remembers messages."""
# XXX we could use a special handler for this, but would need to test
# if it works even if the logger has a too high level
self._warnings.append((msg, args))
return logger.warning(self.get_command_name() + msg, *args)
def run(self):
"""Runs the command."""
# perform the various tests
if self.metadata:
self.check_metadata()
if self.all:
self.check_restructuredtext()
self.check_hooks_resolvable()
# let's raise an error in strict mode, if we have at least
# one warning
if self.strict and len(self._warnings) > 0:
msg = '\n'.join(msg % args for msg, args in self._warnings)
raise PackagingSetupError(msg)
def check_metadata(self):
"""Ensures that all required elements of metadata are supplied.
name, version, URL, author
Warns if any are missing.
"""
missing, warnings = self.distribution.metadata.check(strict=True)
if missing != []:
self.warn('missing required metadata: %s', ', '.join(missing))
for warning in warnings:
self.warn(warning)
def check_restructuredtext(self):
"""Checks if the long string fields are reST-compliant."""
missing, warnings = self.distribution.metadata.check(restructuredtext=True)
if self.distribution.metadata.docutils_support:
for warning in warnings:
line = warning[-1].get('line')
if line is None:
warning = warning[1]
else:
warning = '%s (line %s)' % (warning[1], line)
self.warn(warning)
elif self.strict:
raise PackagingSetupError('The docutils package is needed.')
def check_hooks_resolvable(self):
for options in self.distribution.command_options.values():
for hook_kind in ("pre_hook", "post_hook"):
if hook_kind not in options:
break
for hook_name in options[hook_kind][1].values():
try:
resolve_name(hook_name)
except ImportError:
self.warn('name %r cannot be resolved', hook_name)
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