You can set up 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: ">=1.2.0" # Version range identifiers (default: ``*``)
     source: ... # The Galaxy URL to pull the collection from (default: ``--api-server`` from cmdline)

You can specify the following keys for each collection entry:

  * ``name``
  * ``version``
  * ``signatures``
  * ``source``
  * ``type``

The ``version`` key uses the same range identifier format documented in :ref:`collections_older_version`. 

The ``signatures`` key accepts a list of signature sources that are used to supplement those found on the Galaxy server during collection installation and ``ansible-galaxy collection verify``. Signature sources should be URIs that contain the detached signature. The ``--keyring`` CLI option must be provided if signatures are specified.

Signatures are only used to verify collections on Galaxy servers. User-provided signatures are not used to verify collections installed from git repositories, source directories, or URLs/paths to tar.gz files.

.. code-block:: yaml

   collections:
     - name: namespace.name
       version: 1.0.0
       type: galaxy
       signatures:
         - https://examplehost.com/detached_signature.asc
         - file:///path/to/local/detached_signature.asc

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

When you install a collection with ``type: git``, the ``version`` key can refer to a branch or to a `git commit-ish <https://git-scm.com/docs/gitglossary#def_commit-ish>`_ object (commit or tag). For example:

.. code-block:: yaml

   collections:
     - name: https://github.com/organization/repo_name.git
       type: git
       version: devel

You can also add roles to a ``requirements.yml`` file, 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" # note that ranges are not supported for roles


    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.