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# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright (c) 2012, Cloudscaling
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
"""nova HACKING file compliance testing
built on top of pep8.py
"""
import inspect
import os
import re
import sys
import traceback
import pep8
#N1xx comments
#N2xx except
#N3xx imports
#N4xx docstrings
#N5xx dictionaries/lists
#N6xx Calling methods
def nova_todo_format(physical_line):
"""
nova HACKING guide recommendation for TODO:
Include your name with TODOs as in "#TODO(termie)"
N101
"""
pos = physical_line.find('TODO')
pos1 = physical_line.find('TODO(')
pos2 = physical_line.find('#') # make sure its a comment
if (pos != pos1 and pos2 >= 0 and pos2 < pos):
return pos, "NOVA N101: Use TODO(NAME)"
def nova_except_format(logical_line):
"""
nova HACKING guide recommends not using except:
Do not write "except:", use "except Exception:" at the very least
N201
"""
if logical_line.startswith("except:"):
return 6, "NOVA N201: no 'except:' at least use 'except Exception:'"
def nova_except_format(logical_line):
"""
nova HACKING guide recommends not using assertRaises(Exception...):
Do not use overly broad Exception type
N202
"""
if logical_line.startswith("self.assertRaises(Exception"):
return 1, "NOVA N202: assertRaises Exception too broad"
def nova_one_import_per_line(logical_line):
"""
nova HACKING guide recommends one import per line:
Do not import more than one module per line
Examples:
BAD: from nova.rpc.common import RemoteError, LOG
BAD: from sqlalchemy import MetaData, Table
N301
"""
pos = logical_line.find(',')
if (pos > -1 and (logical_line.startswith("import ") or
(logical_line.startswith("from ") and
logical_line.split()[2] == "import"))):
return pos, "NOVA N301: one import per line"
def nova_import_module_only(logical_line):
"""
nova HACKING guide recommends importing only modules:
Do not import objects, only modules
N302 import only modules
N303 Invalid Import
N304 Relative Import
"""
def importModuleCheck(mod, parent=None, added=False):
"""
If can't find module on first try, recursively check for relative
imports
"""
current_path = os.path.dirname(pep8.current_file)
try:
valid = True
if parent:
parent_mod = __import__(parent, globals(), locals(), [mod], -1)
valid = inspect.ismodule(getattr(parent_mod, mod))
else:
__import__(mod, globals(), locals(), [], -1)
valid = inspect.ismodule(sys.modules[mod])
if not valid:
if added:
sys.path.pop()
added = False
return logical_line.find(mod), ("NOVA N304: No relative "
"imports. '%s' is a relative import" % logical_line)
return logical_line.find(mod), ("NOVA N302: import only "
"modules. '%s' does not import a module" % logical_line)
except (ImportError, NameError):
if not added:
added = True
sys.path.append(current_path)
return importModuleCheck(mod, parent, added)
else:
print >> sys.stderr, ("ERROR: import '%s' failed, couldn't "
"find module" % logical_line)
added = False
sys.path.pop()
return
except AttributeError:
# Invalid import
return logical_line.find(mod), ("NOVA N303: Invalid import, "
"AttributeError raised")
split_line = logical_line.split()
# handle "import x"
# handle "import x as y"
if (logical_line.startswith("import ") and "," not in logical_line and
(len(split_line) == 2 or
(len(split_line) == 4 and split_line[2] == "as"))):
mod = split_line[1]
return importModuleCheck(mod)
# handle "from x import y"
# handle "from x import y as z"
elif (logical_line.startswith("from ") and "," not in logical_line and
split_line[2] == "import" and split_line[3] != "*" and
(len(split_line) == 4 or
(len(split_line) == 6 and split_line[4] == "as"))):
mod = split_line[3]
return importModuleCheck(mod, split_line[1])
# TODO(jogo) handle "from x import *"
#TODO(jogo) Dict and list objects
current_file = ""
def readlines(filename):
"""
record the current file being tested
"""
pep8.current_file = filename
return open(filename).readlines()
def add_nova():
"""
Look for functions that start with nova_ and have arguments
and add them to pep8 module
Assumes you know how to write pep8.py checks
"""
for name, function in globals().items():
if not inspect.isfunction(function):
continue
args = inspect.getargspec(function)[0]
if args and name.startswith("nova"):
exec("pep8.%s = %s" % (name, name))
if __name__ == "__main__":
#include nova path
sys.path.append(os.getcwd())
#NOVA error codes start with an N
pep8.ERRORCODE_REGEX = re.compile(r'[EWN]\d{3}')
add_nova()
pep8.current_file = current_file
pep8.readlines = readlines
pep8._main()
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