1 files changed, 46 insertions, 0 deletions
diff --git a/cmake/external/boringssl.cmake b/cmake/external/boringssl.cmake
new file mode 100644
index 0000000..4463ba8
--- /dev/null
+++ b/cmake/external/boringssl.cmake
@@ -0,0 +1,46 @@
+# Copyright 2018 Google
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+include(ExternalProject)
+
+if(TARGET boringssl)
+  return()
+endif()
+
+# This ExternalProject unpacks itself inside the gRPC source tree. CMake clears
+# the SOURCE_DIR when unpacking so this must come after grpc despite the fact
+# that grpc logically depends upon this.
+
+# This matches grpc at v1.8.3:
+# https://github.com/grpc/grpc/tree/v1.8.3/third_party
+set(commit be2ee342d3781ddb954f91f8a7e660c6f59e87e5)
+
+ExternalProject_Add(
+  boringssl
+  DEPENDS
+    grpc-download
+
+  DOWNLOAD_DIR ${FIREBASE_DOWNLOAD_DIR}
+  DOWNLOAD_NAME boringssl-${commit}.tar.gz
+  URL https://github.com/google/boringssl/archive/${commit}.tar.gz
+  URL_HASH SHA256=8b9f399b8948ab36d51b5b979b208fdf4197e244a516e08d3ed3a9fbb387d463
+
+  PREFIX ${PROJECT_BINARY_DIR}
+  SOURCE_DIR ${PROJECT_BINARY_DIR}/src/grpc/third_party/boringssl
+
+  CONFIGURE_COMMAND ""
+  BUILD_COMMAND     ""
+  INSTALL_COMMAND   ""
+  TEST_COMMAND      ""
+)