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