Modify external builds to download archives

GIT_SHALLOW is not available until CMake 3.6. It's also considerably slower for
huge repositories like curl's.

PiperOrigin-RevId: 297649878

Author: wilhuff

cmake/external/curl.cmake

@@ -1,4 +1,4 @@
-# Copyright 2019 Google
+# Copyright 2019 Google LLC
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -18,17 +18,18 @@ if(TARGET curl OR NOT DOWNLOAD_CURL)
   return()
 endif()
 
+set(version 7_58_0)
+
 ExternalProject_Add(
   curl
 
-  GIT_REPOSITORY https://github.com/curl/curl.git
-  GIT_TAG        curl-7_58_0
-  GIT_SHALLOW    1
+  DOWNLOAD_DIR ${FIREBASE_DOWNLOAD_DIR}
+  URL https://github.com/curl/curl/archive/curl-${version}.tar.gz
 
   PREFIX ${PROJECT_BINARY_DIR}
 
   CONFIGURE_COMMAND ""
   BUILD_COMMAND ""
   INSTALL_COMMAND ""
   TEST_COMMAND ""
-)
+)

cmake/external/flatbuffers.cmake

@@ -1,4 +1,4 @@
-# Copyright 2018 Google
+# Copyright 2018 Google LLC
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -18,17 +18,19 @@ if(TARGET flatbuffers OR NOT DOWNLOAD_FLATBUFFERS)
   return()
 endif()
 
+set(version v1.10.0)
+
 ExternalProject_Add(
   flatbuffers
 
-  GIT_REPOSITORY https://github.com/google/flatbuffers.git
-  GIT_TAG        v1.10.0
-  GIT_SHALLOW    1
+  DOWNLOAD_DIR ${FIREBASE_DOWNLOAD_DIR}
+  DOWNLOAD_NAME flatbuffers-${version}.tar.gz
+  URL https://github.com/google/flatbuffers/archive/${version}.tar.gz
 
   PREFIX ${PROJECT_BINARY_DIR}
 
   CONFIGURE_COMMAND ""
   BUILD_COMMAND ""
   INSTALL_COMMAND ""
   TEST_COMMAND ""
-)
+)

cmake/external/libuv.cmake

@@ -1,4 +1,4 @@
-# Copyright 2019 Google
+# Copyright 2019 Google LLC
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -18,12 +18,14 @@ if(TARGET libuv OR NOT DOWNLOAD_LIBUV)
   return()
 endif()
 
+set(version v1.33.1)
+
 ExternalProject_Add(
   libuv
 
-  GIT_REPOSITORY https://github.com/libuv/libuv
-  GIT_TAG        v1.33.1
-  GIT_SHALLOW    1
+  DOWNLOAD_DIR ${FIREBASE_DOWNLOAD_DIR}
+  DOWNLOAD_NAME libuv-${version}.tar.gz
+  URL https://github.com/libuv/libuv/archive/${version}.tar.gz
 
   PREFIX ${PROJECT_BINARY_DIR}
 

cmake/external/uWebSockets.cmake

@@ -1,4 +1,4 @@
-# Copyright 2019 Google
+# Copyright 2019 Google LLC
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -18,16 +18,19 @@ if(TARGET uWebSockets OR NOT DOWNLOAD_UWEBSOCKETS)
   return()
 endif()
 
+set(commit 4d94401b9c98346f9afd838556fdc7dce30561eb)
+
 ExternalProject_Add(
   uWebSockets
 
-  GIT_REPOSITORY https://github.com/uNetworking/uWebSockets
-  GIT_TAG        4d94401b9c98346f9afd838556fdc7dce30561eb
+  DOWNLOAD_DIR ${FIREBASE_DOWNLOAD_DIR}
+  DOWNLOAD_NAME uWebSockets-${commit}.tar.gz
+  URL https://github.com/uNetworking/uWebSockets/archive/${commit}.tar.gz
 
   PREFIX ${PROJECT_BINARY_DIR}
 
   CONFIGURE_COMMAND ""
   BUILD_COMMAND ""
   INSTALL_COMMAND ""
   TEST_COMMAND ""
-)
+)

cmake/external/zlib.cmake

@@ -32,4 +32,4 @@ ExternalProject_Add(
   BUILD_COMMAND ""
   INSTALL_COMMAND ""
   TEST_COMMAND ""
-)
+)