Function apex_server_url

atomic-cli/src/commands/auth.rs:501–517

Derive the apex server URL (scheme + host without the leading subdomain label + port) from a tenant-scoped remote URL. `http://alice.localhost:8080/workspaces/w/projects/p/code` → `http://localhost:8080` `https://alice.atomic.storage/...` → `https://atomic.storage` `http://localhost:8080/...` (no subdomain) → `http://localhost:8080`

(remote_url: &str)

/// `https://alice.atomic.storage/...` → `https://atomic.storage`
/// `http://localhost:8080/...` (no subdomain) → `http://localhost:8080`
fn apex_server_url(remote_url: &str) -> Option<String> {
    let url = Url::parse(remote_url).ok()?;
    let scheme = url.scheme();
    let host = url.host_str()?;

    // Strip the first label if there is a subdomain; leave a bare host
    // (e.g. "localhost") untouched.
    let apex_host = match host.find('.') {
        Some(dot) => &host[dot + 1..],
        None => host,
    };

    match url.port() {
        Some(port) => Some(format!("{scheme}://{apex_host}:{port}")),
        None => Some(format!("{scheme}://{apex_host}")),
    }
}

/// Extract the identity name from a remote URL alone (no server config).
///