s2a: Use protos published under com.google.s2a.proto.v2.

MODULE.bazel

@@ -19,6 +19,7 @@ IO_GRPC_GRPC_JAVA_ARTIFACTS = [
     "com.google.guava:failureaccess:1.0.1",
     "com.google.guava:guava:33.3.1-android",
     "com.google.re2j:re2j:1.8",
+    "com.google.s2a.proto.v2:s2a-proto:0.1.1",
     "com.google.truth:truth:1.4.2",
     "com.squareup.okhttp:okhttp:2.7.5",
     "com.squareup.okio:okio:2.10.0",  # 3.0+ needs swapping to -jvm; need work to avoid flag-day

buildscripts/sync-protos.sh

@@ -8,7 +8,7 @@ curl -Ls https://github.com/grpc/grpc-proto/archive/master.tar.gz | tar xz -C "$
 base="$tmpdir/grpc-proto-master"
 
 # Copy protos in 'src/main/proto' from grpc-proto for these projects
-for project in alts grpclb services s2a rls interop-testing; do
+for project in alts grpclb services rls interop-testing; do
   while read -r proto; do
     [ -f "$base/$proto" ] && cp "$base/$proto" "$project/src/main/proto/$proto"
     echo "$proto"

gradle/libs.versions.toml

@@ -103,6 +103,7 @@ protobuf-javalite = { module = "com.google.protobuf:protobuf-javalite", version.
 protobuf-protoc = { module = "com.google.protobuf:protoc", version.ref = "protobuf" }
 re2j = "com.google.re2j:re2j:1.8"
 robolectric = "org.robolectric:robolectric:4.14.1"
+s2a-proto = "com.google.s2a.proto.v2:s2a-proto:0.1.1"
 signature-android = "net.sf.androidscents.signature:android-api-level-21:5.0.1_r2"
 signature-java = "org.codehaus.mojo.signature:java18:1.0"
 # 11.0.0+ require Java 17+

repositories.bzl

@@ -23,6 +23,7 @@ IO_GRPC_GRPC_JAVA_ARTIFACTS = [
     "com.google.guava:failureaccess:1.0.1",
     "com.google.guava:guava:33.3.1-android",
     "com.google.re2j:re2j:1.8",
+    "com.google.s2a.proto.v2:s2a-proto:0.1.1",
     "com.google.truth:truth:1.4.2",
     "com.squareup.okhttp:okhttp:2.7.5",
     "com.squareup.okio:okio:2.10.0",  # 3.0+ needs swapping to -jvm; need work to avoid flag-day

s2a/BUILD.bazel

@@ -1,5 +1,3 @@
-load("@rules_proto//proto:defs.bzl", "proto_library")
-load("//:java_grpc_library.bzl", "java_grpc_library")
 load("@rules_jvm_external//:defs.bzl", "artifact")
 
 java_library(
@@ -25,9 +23,9 @@ java_library(
     name = "s2a_identity",
     srcs = ["src/main/java/io/grpc/s2a/internal/handshaker/S2AIdentity.java"],
     deps = [
-        ":common_java_proto",
         artifact("com.google.errorprone:error_prone_annotations"),
         artifact("com.google.guava:guava"),
+        artifact("com.google.s2a.proto.v2:s2a-proto"),
     ],
 )
 
@@ -58,18 +56,16 @@ java_library(
     ],
     deps = [
         ":token_manager",
-        ":common_java_proto",
         ":s2a_channel_pool",
         ":s2a_identity",
-        ":s2a_java_proto",
-        ":s2a_java_grpc_proto",
         "//api",
         "//core:internal",
         "//netty",
         "//stub",
         artifact("com.google.code.findbugs:jsr305"),
         artifact("com.google.errorprone:error_prone_annotations"),
         artifact("com.google.guava:guava"),
+        artifact("com.google.s2a.proto.v2:s2a-proto"),
         artifact("org.checkerframework:checker-qual"),
         "@com_google_protobuf//:protobuf_java",
         artifact("io.netty:netty-common"),
@@ -94,67 +90,4 @@ java_library(
         artifact("com.google.guava:guava"), 
         artifact("org.checkerframework:checker-qual"), 
     ],
-)
-
-# bazel only accepts proto import with absolute path.
-genrule(
-    name = "protobuf_imports",
-    srcs = glob(["src/main/proto/grpc/gcp/s2a/*.proto"]),
-    outs = [
-        "protobuf_out/grpc/gcp/s2a/s2a.proto",
-        "protobuf_out/grpc/gcp/s2a/s2a_context.proto",
-        "protobuf_out/grpc/gcp/s2a/common.proto",
-    ],
-    cmd = "for fname in $(SRCS); do " +
-          "sed 's,import \",import \"s2a/protobuf_out/,g' $$fname > " +
-          "$(@D)/protobuf_out/grpc/gcp/s2a/$$(basename $$fname); done",
-)
-
-proto_library(
-    name = "common_proto",
-    srcs = [
-        "protobuf_out/grpc/gcp/s2a/common.proto",
-    ],
-)
-
-proto_library(
-    name = "s2a_context_proto",
-    srcs = [
-        "protobuf_out/grpc/gcp/s2a/s2a_context.proto",
-    ],
-    deps = [
-        ":common_proto",
-    ],
-)
-
-proto_library(
-    name = "s2a_proto",
-    srcs = [
-        "protobuf_out/grpc/gcp/s2a/s2a.proto",
-    ],
-    deps = [
-        ":common_proto",
-        ":s2a_context_proto",
-    ],
-)
-
-java_proto_library(
-    name = "s2a_java_proto",
-    deps = [":s2a_proto"],
-)
-
-java_proto_library(
-    name = "s2a_context_java_proto",
-    deps = [":s2a_context_proto"],
-)
-
-java_proto_library(
-    name = "common_java_proto",
-    deps = [":common_proto"],
-)
-
-java_grpc_library(
-    name = "s2a_java_grpc_proto",
-    srcs = [":s2a_proto"],
-    deps = [":s2a_java_proto"],
-)
+)

s2a/build.gradle

@@ -11,6 +11,7 @@ plugins {
 description = "gRPC: S2A"
 
 dependencies {
+    implementation libraries.s2a.proto
 
     api project(':grpc-api')
     implementation project(':grpc-stub'),