`proto_library` can't build generated `srcs`.

[cgrushko]

Repro:

proto_library(name = "generated_proto", srcs = ["generated.proto"])
genrule(name = "generator", outs = ['generated.proto'], cmd = "echo 'syntax = \"proto2\";' > $@")

When building :generated_proto,

generated.proto: No such file or directory

[cheister]

Are there any plans to look at this to unblock #2763?

[buchgr]

Fix coming: https://bazel-review.googlesource.com/#/c/10473/

[buchgr]

This change was rolled back cause it broke builds inside google. Still investigating why.

[buchgr]

@cheister

Unfortunately it will take a bit to resolve this problem. There is an inconsistency between the protobuf compiler inside and outside of google [1]. We are looking at a proper fix that works for both environments and will likely involve some changes by the protobuf team.

I am very sorry about that :-(.

[1] protocolbuffers/protobuf#3022