Method install_environment

crates/openshell-core/src/provider_credentials.rs:201–239

(
        &self,
        revision: u64,
        env: HashMap<String, String>,
        credential_expires_at_ms: HashMap<String, i64>,
        dynamic_credentials: HashMap<String, crate::proto::Provide

    }

    pub fn install_environment(
        &self,
        revision: u64,
        env: HashMap<String, String>,
        credential_expires_at_ms: HashMap<String, i64>,
        dynamic_credentials: HashMap<String, crate::proto::ProviderProfileCredential>,
    ) -> usize {
        let (mut child_env, generation_resolver, current_resolver) =
            SecretResolver::from_provider_env_for_current_revision(
                env,
                credential_expires_at_ms,
                revision,
            );
        let mut inner = self
            .inner
            .write()
            .expect("provider credential state poisoned");

        for key in &inner.suppressed_keys {
            child_env.remove(key);
        }

        inner.current = Arc::new(ProviderCredentialSnapshot {
            revision,
            child_env,
            dynamic_credentials,
        });
        inner.current_resolver = current_resolver.map(Arc::new);

        if let Some(resolver) = generation_resolver {
            inner.generations.push_back(Arc::new(resolver));
            while inner.generations.len() > MAX_RETAINED_CREDENTIAL_GENERATIONS {
                inner.generations.pop_front();
            }
        }
        inner.combined_resolver =
            merge_resolvers(&inner.generations, inner.current_resolver.as_ref());
        inner.current.child_env.len()
    }
}

fn merge_resolvers(