[Cronet] Build static libcronet.a for iOS with complete dependencies.

components/cronet/ios/BUILD.gn

 # Copyright 2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/buildflag_header.gni")
 import("//build/config/ios/rules.gni")
 import("//build/config/mac/symbols.gni")
 import("//build/mac/tweak_info_plist.gni")
 import("//build/util/process_version.gni")
 import("//build/util/version.gni")
@@ skipping 14 matching lines @@
   sources = [
     "//chrome/VERSION",
   ]
   output = "$target_gen_dir/version.h"
   extra_args = [
     "-e",
     "VERSION_FULL=\"%s.%s.%s.%s\" % (MAJOR,MINOR,BUILD,PATCH)",
   ]
 }
 
+config("cronet_include_config") {
+  include_dirs = [ "//components/grpc_support/include" ]
+}
+
+config("cronet_static_config") {
+  libs = [
+    "CronetStatic.framework",
+    "UIKit.Framework",
+    "CFNetwork.framework",
+    "MobileCoreServices.framework",
+    "Security.framework",
+    "SystemConfiguration.framework",
+    "resolv",
+  ]
+  configs = [ ":cronet_include_config" ]
+}
+
+_cronet_deps = [
+  ":cronet_version_header",
+  ":generate_accept_languages",
+  "//base:base",
+  "//components/grpc_support",
+  "//components/metrics:metrics",
+  "//components/metrics/proto:proto",
+  "//components/prefs:prefs",
+  "//ios/net:net",
+  "//ios/web:user_agent",
+  "//net",
+  "//url",
+]
+
+_cronet_sources = [
+  "../histogram_manager.cc",
+  "../histogram_manager.h",
+  "../stale_host_resolver.cc",
+  "../stale_host_resolver.h",
+  "../url_request_context_config.cc",
+  "../url_request_context_config.h",
+  "Cronet.h",
+  "Cronet.mm",
+  "cronet_c_for_grpc.h",
+  "cronet_environment.h",
+  "cronet_environment.mm",
+]
+
+_cronet_public_headers = [
+  "Cronet.h",
+  "cronet_c_for_grpc.h",
+]
+_cronet_public_headers += grpc_public_headers
+
 source_set("cronet_sources") {
-  deps = [
-    ":cronet_version_header",
-    ":generate_accept_languages",
-    "//base:base",
-    "//components/grpc_support",
-    "//components/metrics:metrics",
-    "//components/metrics/proto:proto",
-    "//components/prefs:prefs",
-    "//ios/net:net",
-    "//ios/web:user_agent",
-    "//net",
-    "//url",
-  ]
+  deps = _cronet_deps
 
-  sources = [
-    "../histogram_manager.cc",
-    "../histogram_manager.h",
-    "../stale_host_resolver.cc",
-    "../stale_host_resolver.h",
-    "../url_request_context_config.cc",
-    "../url_request_context_config.h",
-    "Cronet.h",
-    "Cronet.mm",
-    "cronet_c_for_grpc.h",
-    "cronet_environment.h",
-    "cronet_environment.mm",
-  ]
+  sources = _cronet_sources
 
   include_dirs = [ "//components/grpc_support/include" ]
 
   if (!use_platform_icu_alternatives) {
     deps += [ "//base:i18n" ]
   }
 }
 
 # Tweak |info_plist| with current version and revision.
 tweak_info_plist("tweak_cronet_plist") {
   info_plist = "Info.plist"
 }
 
 ios_framework_bundle("cronet_framework") {
   output_name = "Cronet"
   info_plist_target = ":tweak_cronet_plist"
 
   deps = [
     ":cronet_sources",
     "//base",
     "//net:net",
   ]
 
   libs = [ "UIKit.Framework" ]
 
-  include_dirs = [ "//components/grpc_support/include" ]
-
   public_deps = [
     "//components/grpc_support",
   ]
 
-  public_headers = [
-    "Cronet.h",
-    "cronet_c_for_grpc.h",
-  ]
-  public_headers += grpc_public_headers
+  public_headers = _cronet_public_headers
 
   sources = [
     "Cronet.h",
   ]
 
   configs -= [ "//build/config/compiler:default_symbols" ]
   configs += [ "//build/config/compiler:symbols" ]
+
+  public_configs = [ ":cronet_include_config" ]
 }
 
 test("cronet_unittests") {
   testonly = true
 
   sources = [
     "//components/cronet/histogram_manager_unittest.cc",
     "//components/cronet/run_all_unittests.cc",
     "//components/cronet/stale_host_resolver_unittest.cc",
     "//components/cronet/url_request_context_config_unittest.cc",
@@ skipping 14 matching lines @@
   script = "//components/cronet/tools/generate_accept_languages.py"
   args = [
     rebase_path("$target_gen_dir"),
     rebase_path("//"),
   ]
   outputs = [
     "$target_gen_dir/accept_languages_table.h",
   ]
 }
 
+# A static library which contains just _cronet_sources.
+static_library("cronet_static") {
+  deps = _cronet_deps
+
+  sources = _cronet_sources
+
+  visibility = [ ":*" ]
+
+  public_configs = [ ":cronet_include_config" ]
+
+  public_deps = [
+    "//components/grpc_support",
+  ]
+}
+
+# A static library which contains all dependencies of :cronet_static.
+static_library("cronet_deps_complete") {
+  visibility = [ ":*" ]
+  complete_static_lib = true
+  deps = [
+    ":cronet_static",
+  ]
+}
+
+# A static library which contains cronet and all dependendencies hidden inside.
+action("cronet_static_complete") {
+  script = "//components/cronet/tools/hide_symbols.py"
+  deps = [
+    ":cronet_deps_complete",
+    ":cronet_static",
+  ]
+  outputs = [
+    "$target_out_dir/$current_cpu/cronet_static_complete.a",
+  ]
+  args = [
+    "--input_libs",
+    rebase_path("$target_out_dir/libcronet_static.a", root_build_dir),
+    "--deps_lib",
+    rebase_path("$target_out_dir/libcronet_deps_complete.a", root_build_dir),
+    "--output_obj",
+    rebase_path("$target_out_dir/$current_cpu/cronet_static_complete.o",
+                root_build_dir),
+    "--output_lib",
+    rebase_path("$target_out_dir/$current_cpu/cronet_static_complete.a",
+                root_build_dir),
+    "--current_cpu",
+    current_cpu,
+  ]
+
+  public_configs = [ ":cronet_static_config" ]
+}
+
+# A fat static library which exports cronet public symbols and hides all dependendencies.
+lipo_binary("libcronet") {
+  arch_binary_target = ":cronet_static_complete"
+  arch_binary_output = "cronet_static_complete.a"
+  output_name = "libcronet.a"
+  enable_stripping = false
+  enable_dsyms = false
+}
+
+bundle_data("cronet_static_headers") {
+  sources = _cronet_public_headers
+  outputs = [
+    "{{bundle_root_dir}}/Headers/{{source_file_part}}",
+  ]
+}
+
+bundle_data("cronet_static_binary") {
+  sources = get_target_outputs(":libcronet")
+  outputs = [
+    "{{bundle_root_dir}}/Cronet",

[kapishnikov, 2017/05/23 21:37:46]

Can we somehow parameterize the binary name? Target :cronet_static_framework
creates CronetStatic.framework which will contain binary with "Cronet" file
name. This won't work since the name of the framework and the binary should be
the same. We rename it in package_ios.py but it would be great if the valid
framework can be produced by gn.

[mef, 2017/05/24 21:36:59]

Done.

+  ]
+  public_deps = [
+    ":libcronet",
+  ]
+}
+
+template("ios_static_framework") {
+  _target_name = target_name
+  _output_name = target_name
+  if (defined(invoker.output_name)) {
+    _output_name = invoker.output_name
+  }
+  _has_public_headers =
+      defined(invoker.public_headers) && invoker.public_headers != []
+  _has_public_headers = defined(public_headers) && public_headers != []
+
+  #_default_toolchain_root_out_dir =
+  #    get_label_info("$_target_name($default_toolchain)", "root_out_dir")

[kapishnikov, 2017/05/23 21:37:46]

Should remove it before submitting if it is not needed.

[mef, 2017/05/24 21:36:59]

Done.

+
+  if (_has_public_headers) {
+    _framework_headers_target = _target_name + "_framework_headers"
+    _framework_headers_config = _target_name + "_framework_headers_config"
+    config(_framework_headers_config) {
+      # The link settings are inherited from the framework_bundle config.
+      cflags = [
+        "-F",
+        rebase_path("$_default_toolchain_root_out_dir/.", root_build_dir),
+      ]
+    }
+
+    _headers_map_config = _target_name + "_headers_map"
+    _header_map_filename =
+        "$_default_toolchain_target_gen_dir/$_output_name.headers.hmap"
+    config(_headers_map_config) {
+      visibility = [ ":$_target_name" ]
+      include_dirs = [ _header_map_filename ]
+    }
+  }
+
+  create_bundle(_target_name) {
+    bundle_root_dir = "$root_out_dir/$_output_name"
+    deps = invoker.deps
+  }
+}
+
+ios_static_framework("cronet_static_framework") {
+  # bundle_root_dir = "$root_out_dir/CronetStatic.framework"

[kapishnikov, 2017/05/23 21:37:46]

Remove it if it is not needed.

[mef, 2017/05/24 21:36:59]

Done.

+  output_name = "CronetStatic.framework"
+  deps = [
+    ":cronet_static_binary",
+    ":cronet_static_headers",
+  ]
+}
+
 if (additional_toolchains == [] || current_toolchain == default_toolchain) {
   _package_dir = "$root_out_dir/cronet"
 
   action("generate_license") {
     _license_path = "$_package_dir/LICENSE"
 
     script = "//components/cronet/tools/cronet_licenses.py"
     inputs = [
       "//build/util/LASTCHANGE",
       "//buildtools/$host_os/gn",
     ]
     outputs = [
       _license_path,
     ]
     args = [
       "license",
       rebase_path(_license_path, root_build_dir),
       "--gn",
       "--gn-path",
       rebase_path("//buildtools/$host_os/gn", root_build_dir),
     ]
   }
 
   copy("cronet_package_copy") {
     sources = [
       "$root_out_dir/Cronet.framework",
+      "$root_out_dir/CronetStatic.framework",
+      "$target_out_dir/libcronet.a",
       "//AUTHORS",
       "//chrome/VERSION",
     ]
     outputs = [
       "$_package_dir/{{source_file_part}}",
     ]
 
     deps = [
       ":cronet_framework",
+      ":cronet_static_framework",
+      ":libcronet",
     ]
   }
 
   if (enable_dsyms) {
     action("cronet_dsym_archive") {
       script = "//chrome/tools/build/mac/archive_symbols.py"
 
       # These are the dSYMs that will be archived. The sources list must be
       # the target outputs that correspond to the dSYMs (since a dSYM is a
       # directory it cannot be listed as a source file). The targets that
@@ skipping 23 matching lines @@
   }
 
   group("cronet_package") {
     deps = [
       ":cronet_dsym_archive",
       ":cronet_package_copy",
       ":generate_license",
     ]
   }
 }