def file_build(self, path, modname=None):
"""Build astroid from a source code file (i.e. from an ast)
*path* is expected to be a python source file
"""
try:
stream, encoding, data = open_source_file(path)
except IOError as exc:
raise exceptions.AstroidBuildingError(
'Unable to load file {path}:\n{error}',
modname=modname,
path=path,
error=exc) from exc
except (SyntaxError, LookupError) as exc:
raise exceptions.AstroidSyntaxError(
'Python 3 encoding specification error or unknown encoding:\n'
'{error}',
modname=modname,
path=path,
error=exc) from exc
except UnicodeError as exc: # wrong encoding
# detect_encoding returns utf-8 if no encoding specified
raise exceptions.AstroidBuildingError(
'Wrong or no encoding specified for {filename}.',
filename=path) from exc
with stream:
# get module name if necessary
if modname is None:
try:
modname = '.'.join(modutils.modpath_from_file(path))
except ImportError:
modname = os.path.splitext(os.path.basename(path))[0]
# build astroid representation
module = self._data_build(data, modname, path)
return self._post_build(module, encoding)
def _data_build(self, data, modname, path):
"""Build tree node from data and add some informations"""
try:
node = _parse_string(data)
except (TypeError, ValueError, SyntaxError) as exc:
raise exceptions.AstroidSyntaxError(
"Parsing Python code failed:\n{error}",
source=data,
modname=modname,
path=path,
error=exc,
) from exc
if path is not None:
node_file = os.path.abspath(path)
else:
node_file = "<?>"
if modname.endswith(".__init__"):
modname = modname[:-9]
package = True
else:
package = (path is not None and os.path.splitext(
os.path.basename(path))[0] == "__init__")
builder = rebuilder.TreeRebuilder(self._manager)
module = builder.visit_module(node, modname, node_file, package)
module._import_from_nodes = builder._import_from_nodes
module._delayed_assattr = builder._delayed_assattr
return module
def _data_build(self, data, modname, path):
"""Build tree node from data and add some informations"""
try:
node = _parse(data + '\n')
except (TypeError, ValueError, SyntaxError) as exc:
util.reraise(
exceptions.AstroidSyntaxError(
'Parsing Python code failed:\n{error}',
source=data,
modname=modname,
path=path,
error=exc))
if path is not None:
node_file = os.path.abspath(path)
else:
node_file = '<?>'
if modname.endswith('.__init__'):
modname = modname[:-9]
package = True
else:
package = path and path.find('__init__.py') > -1 or False
builder = rebuilder.TreeRebuilder(self._manager)
module = builder.visit_module(node, modname, node_file, package)
module._import_from_nodes = builder._import_from_nodes
module._delayed_assattr = builder._delayed_assattr
return module
