pub fn device_facing_url(target: DevTarget, url: &Url) -> Result<Url>Expand description
The URL the target should open, rewritten when the target cannot reach this machine’s loopback.
WATERUI_DEV_URL travels in the launch environment on every target —
devicectl device process launch -e carries it to a physical iOS device
exactly as SIMCTL_CHILD_* carries it to a simulator.
On a physical iOS device localhost is the phone itself, so the URL’s
loopback host is replaced with the Mac’s LAN address — the address the
device can actually route to. The dev server must be bound to a
non-loopback interface for this to work; WebDevServer::spawn does
that when its target is a physical device.
§Errors
Fails for DevTarget::IosDevice when no LAN-facing IPv4 address can be
determined — passing the phone a localhost URL would fail silently, so
this errors instead.