yamllint/docs/rules.rst
Adrien Vergé ebd6b90d3e anchors: Add new rule to detect undeclared or duplicated anchors
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
2023-03-22 10:34:35 +01:00

132 lines
2.0 KiB
ReStructuredText

Rules
=====
When linting a document with yamllint, a series of rules (such as
``line-length``, ``trailing-spaces``, etc.) are checked against.
A :doc:`configuration file <configuration>` can be used to enable or disable
these rules, to set their level (*error* or *warning*), but also to tweak their
options.
This page describes the rules and their options.
.. contents:: List of rules
:local:
:depth: 1
anchors
-------
.. automodule:: yamllint.rules.anchors
braces
------
.. automodule:: yamllint.rules.braces
brackets
--------
.. automodule:: yamllint.rules.brackets
colons
------
.. automodule:: yamllint.rules.colons
commas
------
.. automodule:: yamllint.rules.commas
comments
--------
.. automodule:: yamllint.rules.comments
comments-indentation
--------------------
.. automodule:: yamllint.rules.comments_indentation
document-end
------------
.. automodule:: yamllint.rules.document_end
document-start
--------------
.. automodule:: yamllint.rules.document_start
empty-lines
-----------
.. automodule:: yamllint.rules.empty_lines
empty-values
------------
.. automodule:: yamllint.rules.empty_values
float-values
------------
.. automodule:: yamllint.rules.float_values
hyphens
-------
.. automodule:: yamllint.rules.hyphens
indentation
-----------
.. automodule:: yamllint.rules.indentation
key-duplicates
--------------
.. automodule:: yamllint.rules.key_duplicates
key-ordering
--------------
.. automodule:: yamllint.rules.key_ordering
line-length
-----------
.. automodule:: yamllint.rules.line_length
new-line-at-end-of-file
-----------------------
.. automodule:: yamllint.rules.new_line_at_end_of_file
new-lines
---------
.. automodule:: yamllint.rules.new_lines
octal-values
------------
.. automodule:: yamllint.rules.octal_values
quoted-strings
--------------
.. automodule:: yamllint.rules.quoted_strings
trailing-spaces
---------------
.. automodule:: yamllint.rules.trailing_spaces
truthy
---------------
.. automodule:: yamllint.rules.truthy