buildscripts: Add script to sync .protos from grpc-proto

Currently only protos in alts, grpclb, and services are synced. Once
some java_package options are "upstreamed", benchmarks and
interop-testing could also be synced.

Author: ejona86

buildscripts/sync-protos.sh

@@ -0,0 +1,30 @@
+#!/bin/bash
+set -e
+
+cd "$(dirname "$0")/.."
+
+tmpdir="$(mktemp -d)"
+curl -Ls https://github.com/grpc/grpc-proto/archive/master.tar.gz | tar xz -C "$tmpdir"
+base="$tmpdir/grpc-proto-master"
+
+# Copy protos in 'src/main/proto' from grpc-proto for these projects
+for project in alts grpclb services; do
+  while read -r proto; do
+    [ -f "$base/$proto" ] && cp "$base/$proto" "$project/src/main/proto/$proto"
+    echo "$proto"
+  done < <(cd "$project/src/main/proto" && find . -name "*.proto")
+done | sort > "$tmpdir/grpc-java.lst"
+
+(cd "$base" && find . -name "*.proto") | sort > "$tmpdir/base.lst"
+echo "Files synced:"
+comm -12 "$tmpdir/grpc-java.lst" "$tmpdir/base.lst"
+
+echo
+echo "Files in grpc-proto not synced:"
+comm -13 "$tmpdir/grpc-java.lst" "$tmpdir/base.lst"
+
+echo
+echo "Files in grpc-java not synced:"
+comm -23 "$tmpdir/grpc-java.lst" "$tmpdir/base.lst"
+
+rm -r "$tmpdir"

services/src/generated/main/grpc/io/grpc/reflection/v1alpha/ServerReflectionGrpc.java

@@ -19,7 +19,7 @@
  */
 @javax.annotation.Generated(
     value = "by gRPC proto compiler",
-    comments = "Source: io/grpc/reflection/v1alpha/reflection.proto")
+    comments = "Source: grpc/reflection/v1alpha/reflection.proto")
 public final class ServerReflectionGrpc {
 
   private ServerReflectionGrpc() {}