Support swift package manager for grpc-core and grpc-cpp.

Author: yulin-liang

.gitignore

@@ -96,6 +96,9 @@ DerivedData
 *.xcuserstate
 *.DS_Store
 
+# Swift Package Manager files
+Package.resolved
+
 # Objective-C generated files
 *.pbobjc.*
 *.pbrpc.*

Package.swift

@@ -0,0 +1,126 @@
+// swift-tools-version:5.2
+// The swift-tools-version declares the minimum version of Swift required to build this package.
+import PackageDescription
+
+let package = Package(
+  name: "gRPC",
+  products: [
+    .library(
+      name: "gRPC-Core",
+      targets: [
+        "gRPC-Core",
+      ]
+    ),
+    .library(
+      name: "gRPC-cpp",
+      targets: [
+        "gRPC-cpp",
+      ]
+    )
+  ],
+
+  dependencies: [
+    .package(
+      name: "abseil",
+      url: "https://github.com/firebase/abseil-cpp-SwiftPM.git",
+      .revision("05d8107f2971a37e6c77245b7c4c6b0a7e97bc99")
+    ),
+    .package(name: "BoringSSL-GRPC",
+      url: "https://github.com/firebase/boringssl-SwiftPM.git",
+      .branch("7bcafa2660bc58715c39637494550d1ed7cd7229")
+    ),
+  ],
+
+  targets: [
+    .target(
+      name: "gRPC-Core",
+      dependencies: [
+        .product(name:"abseil", package: "abseil"),
+        .product(name:"openssl_grpc", package: "BoringSSL-GRPC"),
+      ],
+      path: ".",
+      exclude: [
+        "src/core/ext/filters/load_reporting/",
+        "src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb_channel.cc",
+        "src/core/ext/filters/client_channel/xds/xds_channel.cc",
+        "src/core/ext/transport/cronet/",
+        "src/core/ext/upb-generated/third_party/",
+        "src/core/ext/upbdefs-generated/envoy/config/rbac/",
+        "src/core/ext/upbdefs-generated/google/api/expr/",
+        "src/core/ext/upbdefs-generated/src/",
+        "src/core/ext/upbdefs-generated/third_party/",
+        "src/core/ext/upbdefs-generated/udpa/data/",
+        "src/core/lib/surface/init_unsecure.cc",
+        "src/core/lib/security/authorization/mock_cel/cel_expr_builder_factory.h",
+        "src/core/lib/security/authorization/mock_cel/cel_expression.h",
+        "src/core/lib/security/authorization/mock_cel/evaluator_core.h",
+        "src/core/lib/security/authorization/mock_cel/flat_expr_builder.h",
+        "src/core/lib/security/authorization/mock_cel/statusor.h",
+        "src/core/plugin_registry/grpc_unsecure_plugin_registry.cc",
+        "third_party/re2/re2/testing/",
+        "third_party/re2/re2/fuzzing/",
+        "third_party/re2/util/benchmark.cc",
+        "third_party/re2/util/test.cc",
+        "third_party/re2/util/fuzz.cc",
+        "third_party/upb/upb/bindings/",
+        "third_party/upb/upb/json/",
+        "third_party/upb/upb/pb/",
+      ],
+      sources: [
+        "src/core/ext/filters/",
+        "src/core/ext/transport/",
+        "src/core/ext/upb-generated/",
+        "src/core/ext/upbdefs-generated/",
+        "src/core/ext/xds/",
+        "src/core/lib/",
+        "src/core/plugin_registry/grpc_plugin_registry.cc",
+        "src/core/tsi/",
+        "third_party/re2/re2/",
+        "third_party/re2/util/",
+        "third_party/upb/upb/",
+      ],
+      publicHeadersPath: "spm-core-include",
+      cSettings: [
+        .headerSearchPath("./"),
+        .headerSearchPath("include/"),
+        .headerSearchPath("third_party/re2/"),
+        .headerSearchPath("third_party/upb/"),
+        .headerSearchPath("src/core/ext/upb-generated/"),
+        .headerSearchPath("src/core/ext/upbdefs-generated/"),
+        .define("GRPC_ARES", to: "0"),
+        .unsafeFlags(["-Wno-module-import-in-extern-c"]),
+      ]
+    ),
+    .target(
+      name: "gRPC-cpp",
+      dependencies: [
+        .product(name:"abseil", package: "abseil"),
+        "gRPC-Core",
+      ],
+      path: ".",
+      exclude: [
+        "src/cpp/client/cronet_credentials.cc",
+        "src/cpp/common/insecure_create_auth_context.cc",
+        "src/cpp/ext/",
+        "src/cpp/server/channelz/",
+        "src/cpp/server/load_reporter/",
+        "src/cpp/util/core_stats.cc",
+        "src/cpp/util/core_stats.h",
+        "src/cpp/util/error_details.cc",
+      ],
+      sources: [
+        "src/cpp/",
+      ],
+      publicHeadersPath: "spm-cpp-include",
+      cSettings: [
+        .headerSearchPath("./"),
+        .headerSearchPath("include/"),
+        .headerSearchPath("third_party/upb/"),
+        .headerSearchPath("src/core/ext/upb-generated"),
+        .unsafeFlags(["-Wno-module-import-in-extern-c"]),
+      ]
+    ),
+  ],
+  cLanguageStandard: .gnu11,
+  cxxLanguageStandard: .cxx11
+)

spm-core-include/grpc

@@ -0,0 +1 @@
+../include/grpc

spm-cpp-include/grpcpp

@@ -0,0 +1 @@
+../include/grpcpp