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DOCUMENTATION:
  name: to_yaml
  author: core team
  version_added: 'historical'
  short_description: Convert variable to YAML string
  description:
    - Converts an Ansible variable into a YAML string representation.
    - This filter functions as a wrapper to the L(Python PyYAML library, https://pypi.org/project/PyYAML/)'s C(yaml.dump) function.
    - Ansible automatically converts YAML strings into variable structures so this plugin is used to forcibly retain a YAML string.
  positional: _input
  options:
    _input:
      description: A variable or expression that returns a data structure.
      type: raw
      required: true
    indent:
      description: Number of spaces to indent Python structures, mainly used for display to humans.
      type: integer
    sort_keys:
      description: Affects sorting of dictionary keys.
      default: True
      type: bool
  notes:
    - More options may be available, see L(PyYAML documentation, https://pyyaml.org/wiki/PyYAMLDocumentation) for details.

    # TODO: find docs for these
    #allow_unicode:
    #  description: 
    #  type: bool
    #  default: true
    #default_flow_style
    #default_style
    #canonical=None, 
    #width=None, 
    #line_break=None, 
    #encoding=None, 
    #explicit_start=None, 
    #explicit_end=None, 
    #version=None, 
    #tags=None

EXAMPLES: |
  # dump variable in a template to create a YAML document
  {{ github_workflow |to_yaml}}

  # same as above but 'prettier' (equivalent to to_nice_yaml filter)
  {{ docker_config|to_json(indent=4) }}

RETURN:
  _value:
    description: The YAML serialized string representing the variable structure inputted.
    type: string