Reference connections outside of file

[davispuh]

I want to model/draw whole infrastructure once and then render it in different views/levels (details).

Consider this example

DatacenterA: {
  NodeA: {
    VPNServer <-> _._.DatacenterB.NodeB.VPNServer: Site-to-Site VPN
  }
}

DatacenterB: {
  NodeB: {
    VPNServer
  }
}

I want to split DatacenterA in separate file DatacenterA.d2 and DatacenterB in DatacenterB.d2 but currently it's not possible because I can't reference outside of file.

DatacenterA.d2: invalid underscore

The use case is using it like this

# High-level overview

# Include everything
...@DatacenterA
...@DatacenterB

# Hide details
DatacenterA.NodeA.*: suspend
DatacenterB.NodeB.*: suspend

# Add high level connections
DatacenterA.NodeA -> DatacenterB.NodeB

DatacenterA.link: layers.Detailed
DatacenterB.link: layers.Detailed

layers: {
  Detailed: {
    # Most detailed - don't hide anything
    ...@DatacenterA
    ...@DatacenterB
  }
}

This would allow me to render everything with single source of truth.