Mirrors/yamllint
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

anchors: Add new rule to detect undeclared or duplicated anchors

Browse Source 
According to the YAML specification [^1]:

- > It is an error for an alias node to use an anchor that does not
  > previously occur in the document.

  The `forbid-undeclared-aliases` option checks that aliases do have a
  matching anchor declared previously in the document. Since this is
  required by the YAML spec, this option is enabled by default.

- > The alias refers to the most recent preceding node having the same
  > anchor.

  This means that having a same anchor repeated in a document is
  allowed. However users could want to avoid this, so the new option
  `forbid-duplicated-anchors` allows that. It's disabled by default.

- > It is not an error to specify an anchor that is not used by any
  > alias node.

  This means that it's OK to declare anchors but don't have any alias
  referencing them. However users could want to avoid this, so a new
  option (e.g. `forbid-unused-anchors`) could be implemented in the
  future. See https://github.com/adrienverge/yamllint/pull/537.

Fixes #395
Closes #420

[^1]: https://yaml.org/spec/1.2.2/#71-alias-nodes
This commit is contained in:
Adrien Vergé
2023-03-19 12:21:16 +01:00
parent 8aaa226830
commit ebd6b90d3e
5 changed files with 335 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

209
tests/rules/test_anchors.py Normal file
View File

@@ -0,0 +1,209 @@
# Copyright (C) 2023 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/>.
from tests.common import RuleTestCase
class AnchorsTestCase(RuleTestCase):
rule_id = 'anchors'
def test_disabled(self):
conf = 'anchors: disable'
self.check('---\n'
'- &b true\n'
'- &i 42\n'
'- &s hello\n'
'- &f_m {k: v}\n'
'- &f_s [1, 2]\n'
'- *b\n'
'- *i\n'
'- *s\n'
'- *f_m\n'
'- *f_s\n'
'---\n' # redeclare anchors in a new document
'- &b true\n'
'- &i 42\n'
'- &s hello\n'
'- *b\n'
'- *i\n'
'- *s\n'
'---\n'
'block mapping: &b_m\n'
' key: value\n'
'extended:\n'
' <<: *b_m\n'
' foo: bar\n'
'---\n'
'{a: 1, &x b: 2, c: &y 3, *x: 4, e: *y}\n'
'...\n', conf)
self.check('---\n'
'- &i 42\n'
'---\n'
'- &b true\n'
'- &b true\n'
'- &b true\n'
'- &s hello\n'
'- *b\n'
'- *i\n' # declared in a previous document
'- *f_m\n' # never declared
'- *f_m\n'
'- *f_m\n'
'- *f_s\n' # declared after
'- &f_s [1, 2]\n'
'---\n'
'block mapping: &b_m\n'
' key: value\n'
'---\n'
'block mapping 1: &b_m_bis\n'
' key: value\n'
'block mapping 2: &b_m_bis\n'
' key: value\n'
'extended:\n'
' <<: *b_m\n'
' foo: bar\n'
'---\n'
'{a: 1, &x b: 2, c: &x 3, *x: 4, e: *y}\n'
'...\n', conf)
def test_forbid_undeclared_aliases(self):
conf = ('anchors:\n'
' forbid-undeclared-aliases: true\n'
' forbid-duplicated-anchors: false\n')
self.check('---\n'
'- &b true\n'
'- &i 42\n'
'- &s hello\n'
'- &f_m {k: v}\n'
'- &f_s [1, 2]\n'
'- *b\n'
'- *i\n'
'- *s\n'
'- *f_m\n'
'- *f_s\n'
'---\n' # redeclare anchors in a new document
'- &b true\n'
'- &i 42\n'
'- &s hello\n'
'- *b\n'
'- *i\n'
'- *s\n'
'---\n'
'block mapping: &b_m\n'
' key: value\n'
'extended:\n'
' <<: *b_m\n'
' foo: bar\n'
'---\n'
'{a: 1, &x b: 2, c: &y 3, *x: 4, e: *y}\n'
'...\n', conf)
self.check('---\n'
'- &i 42\n'
'---\n'
'- &b true\n'
'- &b true\n'
'- &b true\n'
'- &s hello\n'
'- *b\n'
'- *i\n' # declared in a previous document
'- *f_m\n' # never declared
'- *f_m\n'
'- *f_m\n'
'- *f_s\n' # declared after
'- &f_s [1, 2]\n'
'---\n'
'block mapping: &b_m\n'
' key: value\n'
'---\n'
'block mapping 1: &b_m_bis\n'
' key: value\n'
'block mapping 2: &b_m_bis\n'
' key: value\n'
'extended:\n'
' <<: *b_m\n'
' foo: bar\n'
'---\n'
'{a: 1, &x b: 2, c: &x 3, *x: 4, e: *y}\n'
'...\n', conf,
problem1=(9, 3),
problem2=(10, 3),
problem3=(11, 3),
problem4=(12, 3),
problem5=(13, 3),
problem6=(24, 7),
problem7=(27, 36))
def test_forbid_duplicated_anchors(self):
conf = ('anchors:\n'
' forbid-undeclared-aliases: false\n'
' forbid-duplicated-anchors: true\n')
self.check('---\n'
'- &b true\n'
'- &i 42\n'
'- &s hello\n'
'- &f_m {k: v}\n'
'- &f_s [1, 2]\n'
'- *b\n'
'- *i\n'
'- *s\n'
'- *f_m\n'
'- *f_s\n'
'---\n' # redeclare anchors in a new document
'- &b true\n'
'- &i 42\n'
'- &s hello\n'
'- *b\n'
'- *i\n'
'- *s\n'
'---\n'
'block mapping: &b_m\n'
' key: value\n'
'extended:\n'
' <<: *b_m\n'
' foo: bar\n'
'---\n'
'{a: 1, &x b: 2, c: &y 3, *x: 4, e: *y}\n'
'...\n', conf)
self.check('---\n'
'- &i 42\n'
'---\n'
'- &b true\n'
'- &b true\n'
'- &b true\n'
'- &s hello\n'
'- *b\n'
'- *i\n' # declared in a previous document
'- *f_m\n' # never declared
'- *f_m\n'
'- *f_m\n'
'- *f_s\n' # declared after
'- &f_s [1, 2]\n'
'---\n'
'block mapping: &b_m\n'
' key: value\n'
'---\n'
'block mapping 1: &b_m_bis\n'
' key: value\n'
'block mapping 2: &b_m_bis\n'
' key: value\n'
'extended:\n'
' <<: *b_m\n'
' foo: bar\n'
'---\n'
'{a: 1, &x b: 2, c: &x 3, *x: 4, e: *y}\n'
'...\n', conf,
problem1=(5, 3),
problem2=(6, 3),
problem3=(21, 18),
problem4=(27, 20))