tree da209cf60d0963691dd0e6d756c6cf3e464c7b1e
parent 994a35dedd239b2a12129b3f3dffab40ca6ed60f
author Lalit Maganti <lalitm@google.com> 1561483909 +0100
committer Lalit Maganti <lalitm@google.com> 1561483909 +0100

gn: fix incremental build of descriptor when changing transitive deps

This CL makes it so that GN is aware of the transitive deps of a proto
descriptor rule so that it rebuilds the descriptor when the non-root
files are touched.

We need to wrap protoc because of a bug in protoc where the depfile is
not in the right output format when generating descriptors.

Change-Id: Ib0fb95351849f0ca802e87ea54329430ec6b1ffd