[Reland] Accept proto paths relative to proto_source_root as direct dependencies.

This is a reland of https://github.com/bazelbuild/bazel/commit/5deca4cf88f5568771f2c836a9b8c693b88bd749.

This will make protoc see as direct dependencies the .proto files that were included using the proto_source_root flag.

Until now, Bazel passed to protoc the direct dependencies of a target as the path relative to the WORKSPACE, which made it fail when a shorter path, relative to the package was used.

Progress on #4544.

RELNOTES: None.
PiperOrigin-RevId: 203808292

1 files changed, 7 insertions, 0 deletions

diff --git a/src/main/java/com/google/devtools/build/lib/rules/proto/SupportData.java b/src/main/java/com/google/devtools/build/lib/rules/proto/SupportData.java
index d21a4d9d60..c3bc3aa553 100644
--- a/src/main/java/com/google/devtools/build/lib/rules/proto/SupportData.java
+++ b/src/main/java/com/google/devtools/build/lib/rules/proto/SupportData.java
@@ -35,6 +35,7 @@ public abstract class SupportData {
       NestedSet<Artifact> protosInDirectDeps,
       NestedSet<Artifact> transitiveImports,
       NestedSet<String> transitiveProtoPathFlags,
+      NestedSet<String> directProtoSourceRoots,
       boolean hasProtoSources) {
     return new AutoValue_SupportData(
         nonWeakDepsPredicate,
@@ -42,6 +43,7 @@ public abstract class SupportData {
         transitiveImports,
         protosInDirectDeps,
         transitiveProtoPathFlags,
+        directProtoSourceRoots,
         hasProtoSources);
   }
 
@@ -62,6 +64,11 @@ public abstract class SupportData {
    */
   public abstract NestedSet<String> getTransitiveProtoPathFlags();
 
+  /**
+   * The {@code proto_source_root}'s collected from the current library and the direct dependencies.
+   */
+  public abstract NestedSet<String> getDirectProtoSourceRoots();
+
   public abstract boolean hasProtoSources();
 
   SupportData() {}