ansible/docs/docsite/rst/shared_snippets/installing_multiple_collections.txt

You can also setup a ``requirements.yml`` file to install multiple collections in one command. This file is a YAML file in the format:

.. code-block:: yaml+jinja

   ---
   collections:
   # With just the collection name
   - my_namespace.my_collection

   # With the collection name, version, and source options
   - name: my_namespace.my_other_collection
     version: 'version range identifiers (default: ``*``)'
     source: 'The Galaxy URL to pull the collection from (default: ``--api-server`` from cmdline)'

The ``version`` key can take in the same range identifier format documented above.

Roles can also be specified and placed under the ``roles`` key. The values follow the same format as a requirements
file used in older Ansible releases.

.. code-block:: yaml

    ---
    roles:
      # Install a role from Ansible Galaxy.
      - src: geerlingguy.java
        version: 1.9.6

    collections:
      # Install a collection from Ansible Galaxy.
      - name: geerlingguy.php_roles
        version: 0.9.3
        source: https://galaxy.ansible.com

.. note::
    While both roles and collections can be specified in one requirements file, they need to be installed separately.
    The ``ansible-galaxy role install -r requirements.yml`` will only install roles and
    ``ansible-galaxy collection install -r requirements.yml -p ./`` will only install collections.