New returns an initialized command tree.

AcceptMulti allows multiple clients to connect to the same server.

Addr is the debugging server listen address.

APIVersion is the requested API version while running headless.

BuildFlags is the flags passed during compiler invocation.

Headless is whether to run without terminal.

InitFile is the path to initialization file.

Log is whether to log debug statements.

RootCommand is the root of the command tree.

WorkingDir is the working directory for running the program.