Currently Rose2019 can be configured to provide the ROSE_SITE environment and Jinja2 variable automatically based on the value of the rose.conf|site setting.
Note: This is similar, but completely separate from the identical
ROSE_SITEvariable some sites may have configured for use withrose_stemwhich is implemented via the rose.conf[rose-stem]automatic-options=SITE configuration and is only available to suites run via therose stemcommand.
We are considering retiring the former (rose.conf|site) and moving this functionality into Cylc (as CYLC_SITE?) where it would make more sense. This is a fairly recent feature which may not be in use. Before we remove it, is this feature in use anywhere?