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# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
from __future__ import absolute_import, print_function, unicode_literals
from StringIO import StringIO
from . import (
CombinedDependsFunction,
ConfigureError,
ConfigureSandbox,
DependsFunction,
)
from .lint_util import disassemble_as_iter
from mozbuild.util import memoize
class LintSandbox(ConfigureSandbox):
def __init__(self, environ=None, argv=None, stdout=None, stderr=None):
out = StringIO()
stdout = stdout or out
stderr = stderr or out
environ = environ or {}
argv = argv or []
self._wrapped = {}
super(LintSandbox, self).__init__({}, environ=environ, argv=argv,
stdout=stdout, stderr=stderr)
def run(self, path=None):
if path:
self.include_file(path)
def _missing_help_dependency(self, obj):
if isinstance(obj, CombinedDependsFunction):
return False
if isinstance(obj, DependsFunction):
if (self._help_option in obj.dependencies or
obj in (self._always, self._never)):
return False
func, glob = self._wrapped[obj.func]
# We allow missing --help dependencies for functions that:
# - don't use @imports
# - don't have a closure
# - don't use global variables
if func in self._imports or func.func_closure:
return True
for op, arg in disassemble_as_iter(func):
if op in ('LOAD_GLOBAL', 'STORE_GLOBAL'):
# There is a fake os module when one is not imported,
# and it's allowed for functions without a --help
# dependency.
if arg == 'os' and glob.get('os') is self.OS:
continue
return True
return False
@memoize
def _value_for_depends(self, obj, need_help_dependency=False):
with_help = self._help_option in obj.dependencies
if with_help:
for arg in obj.dependencies:
if self._missing_help_dependency(arg):
raise ConfigureError(
"`%s` depends on '--help' and `%s`. "
"`%s` must depend on '--help'"
% (obj.name, arg.name, arg.name))
elif ((self._help or need_help_dependency) and
self._missing_help_dependency(obj)):
raise ConfigureError("Missing @depends for `%s`: '--help'" %
obj.name)
return super(LintSandbox, self)._value_for_depends(
obj, need_help_dependency)
def _prepare_function(self, func):
wrapped, glob = super(LintSandbox, self)._prepare_function(func)
if wrapped not in self._wrapped:
self._wrapped[wrapped] = func, glob
return wrapped, glob
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