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yamllint/docs/configuration.rst

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Configuration
=============
yamllint uses a set of *rules* to check sources files for problems. Each rule is
independent from the others, and can be enabled, disabled or tweaked. All these
settings can be gathered in a configuration file.
To use a custom configuration file, either name it ``.yamllint`` in your working
directory, or use the ``-c`` option:
::
yamllint -c ~/myconfig file.yml
Default configuration
---------------------
Unless told otherwise, yamllint uses its ``default`` configuration:
.. literalinclude:: ../yamllint/conf/default.yml
:language: yaml
Details on rules can be found on :doc:`the rules page <rules>`.
Extending the default configuration
-----------------------------------
When writing a custom configuration file, you don't need to redefine every rule.
Just extend the ``default`` configuration (or any already-existing configuration
file).
For instance, if you just want to disable the ``comments-indentation`` rule,
your file could look like this:
.. code-block:: yaml
# This is my first, very own configuration file for yamllint!
# It extends the default conf by adjusting some options.
extends: default
rules:
comments-indentation: disable # don't bother me with this rule
Similarly, if you want to set the ``line-length`` rule as a warning and be less
strict on block sequences indentation:
.. code-block:: yaml
extends: default
rules:
# 80 should be enough, but don't fail if a line is longer
line-length:
max: 80
level: warning
# accept both key:
# - item
#
# and key:
# - item
indentation:
indent-sequences: whatever
Errors and warnings
-------------------
Problems detected by yamllint can be raised either as errors or as warnings.
In both cases, the script will output them (with different colors when using the
``standard`` output format), but the exit code can be different. More precisely,
the script will exit will a failure code *only when* there is one or more
error(s).