tree fd04cd8cc065526b076b59a9c24662d81d35fcb8
parent ce1a3806b557e2b3236499f772c2320f933d5a80
author Michael Matloob <matloob@golang.org> 1559161994 -0400
committer Michael Matloob <matloob@golang.org> 1559253328 +0000

go/packages: support new main packages in overlays

Refactor the overlay code to create package structs for
new packages that don't already exist. This requires
calling out to the go command to determine module
roots to figure out which module a package belongs to.
The extra go list call is done in sequence in this CL
but can easily be done in parallel with other go list
calls in the future.

Change-Id: Ia0f7812fba250d154033038cb1e2afa7dedf0e16
Reviewed-on: https://go-review.googlesource.com/c/tools/+/179600
Run-TryBot: Michael Matloob <matloob@golang.org>
Reviewed-by: Ian Cottrell <iancottrell@google.com>