ansible-later/testenv/lib/python2.7/site-packages/yamllint/rules/key_duplicates.py
2019-04-23 13:04:27 +02:00

101 lines
2.8 KiB
Python

# -*- coding: utf-8 -*-
# Copyright (C) 2016 Adrien Vergé
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
"""
Use this rule to prevent multiple entries with the same key in mappings.
.. rubric:: Examples
#. With ``key-duplicates: {}``
the following code snippet would **PASS**:
::
- key 1: v
key 2: val
key 3: value
- {a: 1, b: 2, c: 3}
the following code snippet would **FAIL**:
::
- key 1: v
key 2: val
key 1: value
the following code snippet would **FAIL**:
::
- {a: 1, b: 2, b: 3}
the following code snippet would **FAIL**:
::
duplicated key: 1
"duplicated key": 2
other duplication: 1
? >-
other
duplication
: 2
"""
import yaml
from yamllint.linter import LintProblem
ID = 'key-duplicates'
TYPE = 'token'
MAP, SEQ = range(2)
class Parent(object):
def __init__(self, type):
self.type = type
self.keys = []
def check(conf, token, prev, next, nextnext, context):
if 'stack' not in context:
context['stack'] = []
if isinstance(token, (yaml.BlockMappingStartToken,
yaml.FlowMappingStartToken)):
context['stack'].append(Parent(MAP))
elif isinstance(token, (yaml.BlockSequenceStartToken,
yaml.FlowSequenceStartToken)):
context['stack'].append(Parent(SEQ))
elif isinstance(token, (yaml.BlockEndToken,
yaml.FlowMappingEndToken,
yaml.FlowSequenceEndToken)):
context['stack'].pop()
elif (isinstance(token, yaml.KeyToken) and
isinstance(next, yaml.ScalarToken)):
# This check is done because KeyTokens can be found inside flow
# sequences... strange, but allowed.
if len(context['stack']) > 0 and context['stack'][-1].type == MAP:
if (next.value in context['stack'][-1].keys and
# `<<` is "merge key", see http://yaml.org/type/merge.html
next.value != '<<'):
yield LintProblem(
next.start_mark.line + 1, next.start_mark.column + 1,
'duplication of key "%s" in mapping' % next.value)
else:
context['stack'][-1].keys.append(next.value)