Reland 596ff54335b2a1b393af10657bc4945114f3beed - Split API bundle generation steps

extensions/generated_extensions_api.gni

 # Copyright 2014 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.
 
 # Defines a static library corresponding to the output of schema compiler tools
 # over a set of extensions API schemas (IDL or JSON format.) The library target
 # has implicit hard dependencies on all schema files listed by the invoker and
 # is itself a hard dependency.
 #
 # Invocations of this template may use the following variables:
 #
 # sources [required] A list of schema files to be compiled.
 #
 # root_namespace [required]
 #     A Python string substituion pattern used to generate the C++
 #     namespace for each API. Use %(namespace)s to replace with the API
 #     namespace, like "toplevel::%(namespace)s_api".
 #
+# schemas [optional, default = false]
+#   Boolean indicating if the schema files should be generated.
+#
 # bundle [optional, default = false]
-#   Boolean indicating if the schema files should be bundled or not.
+#   Boolean indicating if the schema bundle files should be generated.
 #
-# impl_dir [required if bundle = true, otherwise unused]
+# bundle_registration [optional, default = false]
+#   Boolean indicating if the API registration bundle files should be generated.
+#
+# impl_dir [required if bundle_registration = true, otherwise unused]
 #   The path containing C++ implementations of API functions. This path is
 #   used as the root path when looking for {schema}/{schema}_api.h headers
-#   during the API bundle generation phase. Such headers, if found, are
+#   when generating API registration bundles. Such headers, if found, are
 #   automatically included by the generated code.
 #
-# uncompiled_sources [optional, only used when bundle = true]
+# uncompiled_sources [optional, only used when bundle = true or
+#     bundle_registration = true]
 #   A list of schema files which should not be compiled, but which should still
 #   be processed for API bundle generation.
 #
 # deps [optional]
 #   If any deps are specified they will be inherited by the static library
 #   target.
 #
-# The static libarary target also inherits the visibility and output_name
+# The static library target also inherits the visibility and output_name
 # of its invoker.
 
 template("generated_extensions_api") {
   assert(defined(invoker.sources),
          "\"sources\" must be defined for the $target_name template.")
   assert(defined(invoker.root_namespace),
          "\"root_namespace\" must be defined for the $target_name template.")
 
+  schemas = defined(invoker.schemas) && invoker.schemas
   bundle = defined(invoker.bundle) && invoker.bundle
+  bundle_registration = defined(invoker.bundle_registration) &&
+      invoker.bundle_registration
 
   # Keep a copy of the target_name here since it will be trampled
   # in nested targets.
   target_visibility = ":$target_name"
 
   generated_config_name = target_name + "_generated_config"
   config(generated_config_name) {
     include_dirs = [ target_gen_dir ]
     visibility = target_visibility
   }
 
-  schemas = invoker.sources
+  sources = invoker.sources
   root_namespace = invoker.root_namespace
 
   compiler_root = "//tools/json_schema_compiler"
   compiler_script = "$compiler_root/compiler.py"
   compiler_sources = [
     "$compiler_root/cc_generator.py",
     "$compiler_root/code.py",
     "$compiler_root/compiler.py",
     "$compiler_root/cpp_generator.py",
     "$compiler_root/cpp_type_generator.py",
     "$compiler_root/cpp_util.py",
     "$compiler_root/h_generator.py",
     "$compiler_root/idl_schema.py",
     "$compiler_root/model.py",
     "$compiler_root/util_cc_helper.py",
   ]
 
-  schema_generator_name = target_name + "_schema_generator"
-  action_foreach(schema_generator_name) {
-    script = compiler_script
-    inputs = compiler_sources
-    sources = schemas
-    outputs = [
-      "$target_gen_dir/{{source_name_part}}.cc",
-      "$target_gen_dir/{{source_name_part}}.h",
-    ]
-    args = [
-      "{{source}}",
-      "--root=" + rebase_path("//", root_build_dir),
-      "--destdir=" + rebase_path(root_gen_dir, root_build_dir),
-      "--namespace=$root_namespace",
-      "--generator=cpp" ]
-    visibility = target_visibility
+  if (schemas) {
+    schema_generator_name = target_name + "_schema_generator"
+    action_foreach(schema_generator_name) {
+      script = compiler_script
+      inputs = compiler_sources
+      outputs = [
+        "$target_gen_dir/{{source_name_part}}.cc",
+        "$target_gen_dir/{{source_name_part}}.h",
+      ]
+      args = [
+        "{{source}}",
+        "--root=" + rebase_path("//", root_build_dir),
+        "--destdir=" + rebase_path(root_gen_dir, root_build_dir),
+        "--namespace=$root_namespace",
+        "--generator=cpp" ]
+      visibility = target_visibility
+    }
   }
 
   if (bundle) {
-    assert(defined(invoker.impl_dir),
-           "\"impl_dir\" must be defined for the $target_name template.")
-    impl_dir = invoker.impl_dir
-
-    uncompiled_schemas = []
+    uncompiled_sources = []
     if (defined(invoker.uncompiled_sources)) {
-      uncompiled_schemas = invoker.uncompiled_sources
+     uncompiled_sources = invoker.uncompiled_sources
     }
 
-    bundle_generator_name = target_name + "_bundle_generator"
-    action(bundle_generator_name) {
+    bundle_generator_schema_name = target_name + "_bundle_generator_schema"
+    action(bundle_generator_schema_name) {
       script = compiler_script
-      inputs = compiler_sources + schemas + uncompiled_schemas
+      inputs = compiler_sources + sources + uncompiled_sources
       outputs = [
-        "$target_gen_dir/generated_api.cc",
-        "$target_gen_dir/generated_api.h",
         "$target_gen_dir/generated_schemas.cc",
         "$target_gen_dir/generated_schemas.h",
       ]
       args = [
         "--root=" + rebase_path("//", root_build_dir),
         "--destdir=" + rebase_path(root_gen_dir, root_build_dir),
         "--namespace=$root_namespace",
-        "--generator=cpp-bundle",
+        "--generator=cpp-bundle-schema",
+      ] +
+        rebase_path(sources, root_build_dir) +
+        rebase_path(uncompiled_sources, root_build_dir)
+    }
+  }
+
+  if (bundle_registration) {
+    uncompiled_sources = []
+    if (defined(invoker.uncompiled_sources)) {
+     uncompiled_sources = invoker.uncompiled_sources
+    }
+
+    assert(defined(invoker.impl_dir),
+           "\"impl_dir\" must be defined for the $target_name template.")
+    impl_dir = invoker.impl_dir
+
+    bundle_generator_registration_name = target_name +
+        "_bundle_generator_registration"
+    action(bundle_generator_registration_name) {
+      script = compiler_script
+      inputs = compiler_sources + sources + uncompiled_sources
+      outputs = [
+        "$root_gen_dir/$impl_dir/generated_api_registration.cc",
+        "$root_gen_dir/$impl_dir/generated_api_registration.h",
+      ]
+      args = [
+        "--root=" + rebase_path("//", root_build_dir),
+        "--destdir=" + rebase_path(root_gen_dir, root_build_dir),
+        "--namespace=$root_namespace",
+        "--generator=cpp-bundle-registration",
         "--impl-dir=" + rebase_path(impl_dir, "//"),
       ] +
-        rebase_path(schemas, root_build_dir) +
-        rebase_path(uncompiled_schemas, root_build_dir)
+        rebase_path(sources, root_build_dir) +
+        rebase_path(uncompiled_sources, root_build_dir)
     }
   }
 
   source_set(target_name) {
-    sources = get_target_outputs(":$schema_generator_name")
-
-    deps = [
-      ":$schema_generator_name",
-      "//tools/json_schema_compiler:generated_api_util",
-    ]
+    sources = []
+    deps = []
+    
+    if (schemas) {
+      sources += get_target_outputs(":$schema_generator_name")
+      deps += [
+        ":$schema_generator_name",
+        "//tools/json_schema_compiler:generated_api_util",
+      ]
+    }
 
     if (bundle) {
-      sources += get_target_outputs(":$bundle_generator_name")
-      deps += [ ":$bundle_generator_name" ]
+      sources += get_target_outputs(":$bundle_generator_schema_name")
+      deps += [ ":$bundle_generator_schema_name" ]
+    }
+
+    if (bundle_registration) {
+      sources += get_target_outputs(":$bundle_generator_registration_name")
+      deps += [ ":$bundle_generator_registration_name" ]
     }
 
     if (defined(invoker.deps)) {
       deps += invoker.deps
     }
     direct_dependent_configs = [ ":$generated_config_name" ]
 
     if (defined(invoker.visibility)) {
       visibility = invoker.visibility
     }
     if (defined(invoker.output_name)) {
       output_name = invoker.output_name
     }
   }
 }