Function resolve 

pub fn resolve(
    request: &Request<'_>,
    env: &dyn Fn(&str) -> Option<String>,
    fetch: &dyn Fetch,
    progress: &mut dyn FnMut(&str),
) -> Result<Provisioned, ProvisionError>

Answers request from the caller’s binary, the cache, or the release, in that order.

env supplies $MICROVM_AGENTD and, when Request::state_dir is None, the variables crate::names::state_root reads. fetch is the release seam; progress receives one line per step.