You are required to set base_dir and base_url, the rest are optional, but we currently support:

• base_dir: The directory to output and search for assets
• base_url: The url static assets will be located
• debug: If webassets should be in debug mode (i.e no compression)
• updater: Different update configurations (i.e always, timestamp)
• cache: If we should use webassets cache
• jst_compiler: A custom jst compiler, by default it uses underscore
• url_expire: If a cache-busting query string should be added to URLs
• static_view: If assets should be registered as a static view using Pyramid config.add_static_view()
• cache_max_age: If static_view is true, this is passed as the static view's cache_max_age argument (allowing control of expires and cache-control headers)

webassets.base_dir=%(here)s/app/static
webassets.base_url=/static
webassets.debug=True
webassets.updater=timestamp
webassets.cache=False
webassets.jst_compiler=Handlebars.compile
webassets.url_expire=False
webassets.static_view=True
webassets.cache_max_age=3600

Then you can just use config.add_webasset to add bundles to your environment

from webassets import Bundle

jst = Bundle('templates/*.html',
        filters='jst',
        output='js/jst.js', debug=False)

config.add_webasset('jst', jst)

You can use the global webassets tag:

% for url in webassets(request, 'css/bootstrap.css', 'css/bootstrap-responsive.css', output='css/generated.css', filters='cssmin'):
    <link href="${url}" rel="stylesheet">
% endfor

or you can grab the environment from the request.

If you are not using Jinja2, you can still access the environment from the request.

jst_urls = request.webassets_env['jst'].urls()

If you are using Jinja2, you can just do the following configuration (this assumes use of pyramid_jinja2):

config.add_jinja2_extension('webassets.ext.jinja2.AssetsExtension')
assets_env = config.get_webassets_env()
jinja2_env.assets_environment = assets_env

and then:

{% assets "jst" %}
<script type="text/javascript" src="{{ ASSET_URL }}"></script>
{% endassets %}

There are a few utility methods you can use:

get_webassets_env_from_settings(settings, prefix='static_assets'): Pass it a dictionary of your settings and an optional keyword argument of the prefix in your configuration and it will return you a webassets environment.

get_webassets_env(request or config): This will pull the environment out of the registry, you can use either a configurator object or a request.