syntax = "proto3";
package bldr.desktop.update;

option go_package = "github.com/s4wave/spacewave/bldr/desktop/update;desktop_update";

// UpdateTarget identifies the installed component selected for replacement.
enum UpdateTarget {
  // UPDATE_TARGET_UNKNOWN is invalid for an apply request.
  UPDATE_TARGET_UNKNOWN = 0;
  // UPDATE_TARGET_APP selects the installed desktop application.
  UPDATE_TARGET_APP = 1;
  // UPDATE_TARGET_DAEMON selects the executing shared daemon.
  UPDATE_TARGET_DAEMON = 2;
}

// ApplyUpdateRequest selects the installed component to update.
message ApplyUpdateRequest {
  // Target identifies the installed component to update.
  UpdateTarget target = 1;
}

// ApplyUpdateResponse hands a verified app artifact to its process owner.
message ApplyUpdateResponse {
  // StagedPath is the verified desktop artifact; Electron owns its replacement.
  string staged_path = 1;
}