mirror of
https://github.com/Mikaela/Limnoria.git
synced 2024-12-30 06:32:34 +01:00
107 lines
3.5 KiB
Python
107 lines
3.5 KiB
Python
"""Fixer for import statements.
|
|
If spam is being imported from the local directory, this import:
|
|
from spam import eggs
|
|
Becomes:
|
|
from .spam import eggs
|
|
|
|
And this import:
|
|
import spam
|
|
Becomes:
|
|
from . import spam
|
|
"""
|
|
|
|
# Local imports
|
|
from lib2to3 import fixer_base
|
|
from os.path import dirname, join, exists, sep, split, isdir
|
|
from os import listdir
|
|
from lib2to3.fixer_util import FromImport, syms, token
|
|
|
|
|
|
def traverse_imports(names):
|
|
"""
|
|
Walks over all the names imported in a dotted_as_names node.
|
|
"""
|
|
pending = [names]
|
|
while pending:
|
|
node = pending.pop()
|
|
if node.type == token.NAME:
|
|
yield node.value
|
|
elif node.type == syms.dotted_name:
|
|
yield "".join([ch.value for ch in node.children])
|
|
elif node.type == syms.dotted_as_name:
|
|
pending.append(node.children[0])
|
|
elif node.type == syms.dotted_as_names:
|
|
pending.extend(node.children[::-2])
|
|
else:
|
|
raise AssertionError("unkown node type")
|
|
|
|
|
|
class FixImport(fixer_base.BaseFix):
|
|
BM_compatible = True
|
|
|
|
PATTERN = """
|
|
import_from< 'from' imp=any 'import' ['('] any [')'] >
|
|
|
|
|
import_name< 'import' imp=any >
|
|
"""
|
|
|
|
def start_tree(self, tree, name):
|
|
super(FixImport, self).start_tree(tree, name)
|
|
self.skip = "absolute_import" in tree.future_features
|
|
|
|
def transform(self, node, results):
|
|
if self.skip:
|
|
return
|
|
imp = results['imp']
|
|
|
|
if node.type == syms.import_from:
|
|
# Some imps are top-level (eg: 'import ham')
|
|
# some are first level (eg: 'import ham.eggs')
|
|
# some are third level (eg: 'import ham.eggs as spam')
|
|
# Hence, the loop
|
|
while not hasattr(imp, 'value'):
|
|
imp = imp.children[0]
|
|
if self.probably_a_local_import(imp.value):
|
|
imp.value = "." + imp.value
|
|
imp.changed()
|
|
else:
|
|
have_local = False
|
|
have_absolute = False
|
|
for mod_name in traverse_imports(imp):
|
|
if self.probably_a_local_import(mod_name):
|
|
have_local = True
|
|
else:
|
|
have_absolute = True
|
|
if have_absolute:
|
|
if have_local:
|
|
# We won't handle both sibling and absolute imports in the
|
|
# same statement at the moment.
|
|
self.warning(node, "absolute and local imports together")
|
|
return
|
|
|
|
new = FromImport(".", [imp])
|
|
new.prefix = node.prefix
|
|
return new
|
|
|
|
def probably_a_local_import(self, imp_name):
|
|
if imp_name.startswith("."):
|
|
# Relative imports are certainly not local imports.
|
|
return False
|
|
imp_name = imp_name.split(".", 1)[0]
|
|
base_path = dirname(self.filename)
|
|
base_path = join(base_path, imp_name)
|
|
# If there is no __init__.py next to the file its not in a package
|
|
# so can't be a relative import.
|
|
if not exists(join(dirname(base_path), "__init__.py")):
|
|
return False
|
|
(path, filename) = split(base_path)
|
|
if isdir(base_path) and filename in listdir(path):
|
|
# We use listdir too because of case-insensitivity on Windows
|
|
return True
|
|
for ext in [".py", ".pyc", ".so", ".sl", ".pyd"]:
|
|
if (filename + ext) in listdir(path):
|
|
# We use this instead of os.path.exists because of case-insensitivity
|
|
# on Windows
|
|
return True
|
|
return False
|