binder: bazel support (bzlmod mode only)

Author: jdcormie

.bazelrc

@@ -1 +1,3 @@
 build --cxxopt=-std=c++17 --host_cxxopt=-std=c++17
+
+common:skip_android --deleted_packages=binder

.github/workflows/testing.yml

@@ -100,10 +100,10 @@ jobs:
         key: ${{ runner.os }}-bazel-${{ env.USE_BAZEL_VERSION }}-${{ hashFiles('WORKSPACE', 'repositories.bzl') }}
 
     - name: Run bazel build
-      run: bazelisk build //... --enable_bzlmod=${{ matrix.bzlmod }} --enable_workspace=${{ !matrix.bzlmod }}
+      run: bazelisk build //... --config=skip_android --enable_bzlmod=${{ matrix.bzlmod }} --enable_workspace=${{ !matrix.bzlmod }}
 
     - name: Run bazel test
-      run: bazelisk test //... --enable_bzlmod=${{ matrix.bzlmod }} --enable_workspace=${{ !matrix.bzlmod }}
+      run: bazelisk test //... --config=skip_android --enable_bzlmod=${{ matrix.bzlmod }} --enable_workspace=${{ !matrix.bzlmod }}
 
     - name: Run example bazel build
       run: bazelisk build //... --enable_bzlmod=${{ matrix.bzlmod }} --enable_workspace=${{ !matrix.bzlmod }}

MODULE.bazel

@@ -46,21 +46,45 @@ IO_GRPC_GRPC_JAVA_ARTIFACTS = [
 ]
 # GRPC_DEPS_END
 
+ANDROID_ARTIFACTS = [
+    "androidx.annotation:annotation:1.6.0",
+    "androidx.annotation:annotation-jvm:1.6.0",
+    "androidx.core:core:1.13.1",
+    "androidx.lifecycle:lifecycle-common:2.6.2",
+    "androidx.test:core:1.7.0",
+    "androidx.test.ext:junit:1.2.1",
+    "androidx.test:runner:1.6.1",
+    "androidx.test:rules:1.6.1",
+    "org.robolectric:android-all:14-robolectric-10818077",
+    "org.robolectric:annotations:4.16.1",
+    "org.robolectric:robolectric:4.16.1",
+    "org.robolectric:shadows-framework:4.16.1",
+]
+
 bazel_dep(name = "abseil-cpp", version = "20250512.1")
 bazel_dep(name = "bazel_jar_jar", version = "0.1.11.bcr.1")
 bazel_dep(name = "bazel_skylib", version = "1.7.1")
 bazel_dep(name = "googleapis", version = "0.0.0-20240326-1c8d509c5", repo_name = "com_google_googleapis")
 bazel_dep(name = "grpc-proto", version = "0.0.0-20240627-ec30f58.bcr.1", repo_name = "io_grpc_grpc_proto")
 bazel_dep(name = "protobuf", version = "33.4", repo_name = "com_google_protobuf")
+bazel_dep(name = "rules_android", version = "0.7.2")
 bazel_dep(name = "rules_cc", version = "0.0.9")
 bazel_dep(name = "rules_java", version = "9.1.0")
 bazel_dep(name = "rules_jvm_external", version = "6.0")
 
+android_sdk_repository_extension = use_extension(
+    "@rules_android//rules/android_sdk_repository:rule.bzl",
+    "android_sdk_repository_extension",
+)
+use_repo(android_sdk_repository_extension, "androidsdk")
+register_toolchains("@androidsdk//:sdk-toolchain", "@androidsdk//:all")
+
 maven = use_extension("@rules_jvm_external//:extensions.bzl", "maven")
 maven.install(
-    artifacts = IO_GRPC_GRPC_JAVA_ARTIFACTS,
+    artifacts = IO_GRPC_GRPC_JAVA_ARTIFACTS + ANDROID_ARTIFACTS,
     repositories = [
         "https://repo.maven.apache.org/maven2/",
+        "https://maven.google.com", # For androidx.*
     ],
     strict_visibility = True,
 )
@@ -158,3 +182,7 @@ maven.override(
     coordinates = "io.grpc:grpc-util",
     target = "@io_grpc_grpc_java//util",
 )
+maven.override(
+    coordinates = "io.grpc:grpc-binder",
+    target = "@io_grpc_grpc_java//binder",
+)

WORKSPACE

@@ -53,6 +53,7 @@ maven_install(
     override_targets = IO_GRPC_GRPC_JAVA_OVERRIDE_TARGETS,
     repositories = [
         "https://repo.maven.apache.org/maven2/",
+#         "https://maven.google.com", # For androidx.*
     ],
     strict_visibility = True,
 )

binder/BUILD.bazel

@@ -0,0 +1,27 @@
+load("@rules_android//rules:rules.bzl", "android_library")
+load("@rules_jvm_external//:defs.bzl", "artifact")
+
+licenses(["notice"])
+
+android_library(
+    name = "binder",
+    srcs = glob([
+        "src/main/java/**/*.java",
+    ]),
+    manifest = "src/main/AndroidManifest.xml",
+    custom_package = "io.grpc.binder",
+    visibility = ["//visibility:public"],
+    exports = [artifact("androidx.annotation:annotation")],
+    javacopts = ["-Xep:GuardedBy:ERROR"],
+    deps = [
+        "//api",
+        "//core:internal",
+        artifact("androidx.annotation:annotation"),
+        "@maven//:androidx_annotation_annotation_jvm",
+        artifact("androidx.core:core"),
+        artifact("androidx.lifecycle:lifecycle-common"),
+        artifact("com.google.code.findbugs:jsr305"),
+        artifact("com.google.errorprone:error_prone_annotations"),
+        artifact("com.google.guava:guava"),
+    ],
+)