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 supported keys for collection requirement entries are ``name``, ``version``, ``source``, and ``type``.

The ``version`` key can take in the same range identifier format documented above. If you're installing a collection from a git repository instead of a built collection artifact, the ``version`` key refers to a `git commit-ish <https://git-scm.com/docs/gitglossary#def_commit-ish>`_.

The ``type`` key can be set to ``galaxy``, ``url``, ``file``, and ``git``. If ``type`` is omitted, the ``name`` key is used to implicitly determine the source of the collection.

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.
      - name: 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

To install both roles and collections at the same time with one command, run the following:

.. code-block:: bash

    $ ansible-galaxy install -r requirements.yml

Running ``ansible-galaxy collection install -r`` or ``ansible-galaxy role install -r`` will only install collections,
or roles respectively.

.. note::
    Installing both roles and collections from the same requirements file will not work when specifying a custom
    collection or role install path. In this scenario the collections will be skipped and the command will process
    each like ``ansible-galaxy role install`` would.