DOCUMENTATION:
  name: from_yaml_all
  version_added: 'historical'
  short_description: Convert a series of YAML documents into a variable structure
  description:
    - Converts a YAML documents in a string representation into an equivalent structured Ansible variable.
    - Ansible internally auto-converts YAML strings into variable structures in most contexts, but by default does not handle 'multi document' YAML files or strings.
    - If multiple YAML documents are not supplied, this is the equivalend of using C(from_yaml).
  notes:
    - This filter functions as a wrapper to the Python C(yaml.safe_load_all) function, part of the L(pyyaml Python library, https://pypi.org/project/PyYAML/).
    - Possible conflicts in variable names from the mulitple documents are resolved directly by the pyyaml library.
  options:
    _input:
      description: A YAML string.
      type: string
      required: true

EXAMPLES: |
  # variable from string variable containing YAML documents
  {{ multidoc_yaml_string | from_yaml_all }}

  # variable from multidocument YAML string
  {{ '---\n{"a": true, "b": 54, "c": [1,2,3]}\n...\n---{"x": 1}\n...\n' | from_yaml_all}}

RETURN:
  _value:
    description: The variable resulting from deserializing the YAML documents.
    type: raw