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92 lines
2.5 KiB
Python
92 lines
2.5 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright (C) 2016 Peter Ericson
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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 forbid non-explictly typed truthy values other than ``true``
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and ``false``, for example ``YES``, ``False`` and ``off``.
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This can be useful to prevent surprises from YAML parsers transforming
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``[yes, FALSE, Off]`` into ``[true, false, false]`` or
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``{y: 1, yes: 2, on: 3, true: 4, True: 5}`` into ``{y: 1, true: 5}``.
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.. rubric:: Examples
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#. With ``truthy: {}``
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the following code snippet would **PASS**:
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::
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boolean: true
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object: {"True": 1, 1: "True"}
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"yes": 1
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"on": 2
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"True": 3
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explicit:
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string1: !!str True
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string2: !!str yes
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string3: !!str off
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encoded: !!binary |
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True
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OFF
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pad== # this decodes as 'N\xbb\x9e8Qii'
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boolean1: !!bool true
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boolean2: !!bool "false"
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boolean3: !!bool FALSE
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boolean4: !!bool True
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boolean5: !!bool off
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boolean6: !!bool NO
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the following code snippet would **FAIL**:
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::
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object: {True: 1, 1: True}
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the following code snippet would **FAIL**:
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::
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yes: 1
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on: 2
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True: 3
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"""
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import yaml
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from yamllint.linter import LintProblem
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ID = 'truthy'
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TYPE = 'token'
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TRUTHY = ['YES', 'Yes', 'yes',
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'NO', 'No', 'no',
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'TRUE', 'True', # 'true' is a boolean
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'FALSE', 'False', # 'false' is a boolean
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'ON', 'On', 'on',
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'OFF', 'Off', 'off']
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def check(conf, token, prev, next, nextnext, context):
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if prev and isinstance(prev, yaml.tokens.TagToken):
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return
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if isinstance(token, yaml.tokens.ScalarToken):
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if token.value in TRUTHY and token.style is None:
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yield LintProblem(token.start_mark.line + 1,
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token.start_mark.column + 1,
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"truthy value should be true or false")
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