Precompile mojom bindings generator jinja templates.

mojo/public/tools/bindings/mojom.gni

Index: mojo/public/tools/bindings/mojom.gni
diff --git a/mojo/public/tools/bindings/mojom.gni b/mojo/public/tools/bindings/mojom.gni
index 61f43e59a3055f52800fce60353c85a02bcf790e..9cd72173a0aa9d7fc8728028eb34f96aa8e42b72 100644
--- a/mojo/public/tools/bindings/mojom.gni
+++ b/mojo/public/tools/bindings/mojom.gni
@@ -2,6 +2,29 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+mojom_generator_root = "//mojo/public/tools/bindings"
+mojom_generator_script = "$mojom_generator_root/mojom_bindings_generator.py"
+mojom_generator_sources = [
+  "$mojom_generator_root/generators/mojom_cpp_generator.py",
+  "$mojom_generator_root/generators/mojom_js_generator.py",
+  "$mojom_generator_root/generators/mojom_java_generator.py",
+  "$mojom_generator_root/pylib/mojom/__init__.py",
+  "$mojom_generator_root/pylib/mojom/error.py",
+  "$mojom_generator_root/pylib/mojom/generate/__init__.py",
+  "$mojom_generator_root/pylib/mojom/generate/constant_resolver.py",
+  "$mojom_generator_root/pylib/mojom/generate/data.py",
+  "$mojom_generator_root/pylib/mojom/generate/generator.py",
+  "$mojom_generator_root/pylib/mojom/generate/module.py",
+  "$mojom_generator_root/pylib/mojom/generate/pack.py",
+  "$mojom_generator_root/pylib/mojom/generate/template_expander.py",
+  "$mojom_generator_root/pylib/mojom/parse/__init__.py",
+  "$mojom_generator_root/pylib/mojom/parse/ast.py",
+  "$mojom_generator_root/pylib/mojom/parse/lexer.py",
+  "$mojom_generator_root/pylib/mojom/parse/parser.py",
+  "$mojom_generator_root/pylib/mojom/parse/translate.py",
+  "$mojom_generator_script",
+]
+
 # Generate C++/JavaScript/Java source files from mojom files. The output files
 # will go under the generated file directory tree with the same path as each
 # input file.
@@ -44,71 +67,6 @@ template("mojom") {
   cpp_sources_suffix = "cpp_sources"
   cpp_sources_target_name = "${target_name}_${cpp_sources_suffix}"
   if (defined(invoker.sources)) {
-    generator_root = "//mojo/public/tools/bindings"
-    generator_script = "$generator_root/mojom_bindings_generator.py"
-    generator_sources = [
-      generator_script,
-      "$generator_root/generators/cpp_templates/enum_macros.tmpl",
-      "$generator_root/generators/cpp_templates/interface_declaration.tmpl",
-      "$generator_root/generators/cpp_templates/interface_definition.tmpl",
-      "$generator_root/generators/cpp_templates/interface_macros.tmpl",
-      "$generator_root/generators/cpp_templates/interface_proxy_declaration.tmpl",
-      "$generator_root/generators/cpp_templates/interface_request_validator_declaration.tmpl",
-      "$generator_root/generators/cpp_templates/interface_response_validator_declaration.tmpl",
-      "$generator_root/generators/cpp_templates/interface_stub_declaration.tmpl",
-      "$generator_root/generators/cpp_templates/module-internal.h.tmpl",
-      "$generator_root/generators/cpp_templates/module.cc.tmpl",
-      "$generator_root/generators/cpp_templates/module.h.tmpl",
-      "$generator_root/generators/cpp_templates/struct_declaration.tmpl",
-      "$generator_root/generators/cpp_templates/struct_definition.tmpl",
-      "$generator_root/generators/cpp_templates/struct_macros.tmpl",
-      "$generator_root/generators/cpp_templates/struct_serialization_declaration.tmpl",
-      "$generator_root/generators/cpp_templates/struct_serialization_definition.tmpl",
-      "$generator_root/generators/cpp_templates/union_declaration.tmpl",
-      "$generator_root/generators/cpp_templates/union_definition.tmpl",
-      "$generator_root/generators/cpp_templates/union_serialization_declaration.tmpl",
-      "$generator_root/generators/cpp_templates/union_serialization_definition.tmpl",
-      "$generator_root/generators/cpp_templates/validation_macros.tmpl",
-      "$generator_root/generators/cpp_templates/wrapper_class_declaration.tmpl",
-      "$generator_root/generators/cpp_templates/wrapper_class_definition.tmpl",
-      "$generator_root/generators/cpp_templates/wrapper_union_class_declaration.tmpl",
-      "$generator_root/generators/cpp_templates/wrapper_union_class_definition.tmpl",
-      "$generator_root/generators/java_templates/constant_definition.tmpl",
-      "$generator_root/generators/java_templates/constants.java.tmpl",
-      "$generator_root/generators/java_templates/data_types_definition.tmpl",
-      "$generator_root/generators/java_templates/enum_definition.tmpl",
-      "$generator_root/generators/java_templates/enum.java.tmpl",
-      "$generator_root/generators/java_templates/header.java.tmpl",
-      "$generator_root/generators/java_templates/interface_definition.tmpl",
-      "$generator_root/generators/java_templates/interface_internal.java.tmpl",
-      "$generator_root/generators/java_templates/interface.java.tmpl",
-      "$generator_root/generators/java_templates/struct.java.tmpl",
-      "$generator_root/generators/java_templates/union.java.tmpl",
-      "$generator_root/generators/js_templates/enum_definition.tmpl",
-      "$generator_root/generators/js_templates/interface_definition.tmpl",
-      "$generator_root/generators/js_templates/module.amd.tmpl",
-      "$generator_root/generators/js_templates/module_definition.tmpl",
-      "$generator_root/generators/js_templates/struct_definition.tmpl",
-      "$generator_root/generators/js_templates/union_definition.tmpl",
-      "$generator_root/generators/js_templates/validation_macros.tmpl",
-      "$generator_root/generators/mojom_cpp_generator.py",
-      "$generator_root/generators/mojom_js_generator.py",
-      "$generator_root/generators/mojom_java_generator.py",
-      "$generator_root/pylib/mojom/__init__.py",
-      "$generator_root/pylib/mojom/error.py",
-      "$generator_root/pylib/mojom/generate/__init__.py",
-      "$generator_root/pylib/mojom/generate/constant_resolver.py",
-      "$generator_root/pylib/mojom/generate/data.py",
-      "$generator_root/pylib/mojom/generate/generator.py",
-      "$generator_root/pylib/mojom/generate/module.py",
-      "$generator_root/pylib/mojom/generate/pack.py",
-      "$generator_root/pylib/mojom/generate/template_expander.py",
-      "$generator_root/pylib/mojom/parse/__init__.py",
-      "$generator_root/pylib/mojom/parse/ast.py",
-      "$generator_root/pylib/mojom/parse/lexer.py",
-      "$generator_root/pylib/mojom/parse/parser.py",
-      "$generator_root/pylib/mojom/parse/translate.py",
-    ]
     if (defined(invoker.variant)) {
       variant = invoker.variant
       generator_cpp_outputs = [
@@ -134,20 +92,26 @@ template("mojom") {
   if (defined(invoker.sources)) {
     generator_target_name = target_name + "__generator"
     action_foreach(generator_target_name) {
-      script = generator_script
-      inputs = generator_sources
+      script = mojom_generator_script
+      inputs = mojom_generator_sources
       sources = invoker.sources
+      deps = [
+        "//mojo/public/tools/bindings:precompile_templates",
+      ]
       outputs =
           generator_cpp_outputs + generator_java_outputs + generator_js_outputs
       args = [
-        "{{source}}",
         "--use_bundled_pylibs",
+        "generate",
+        "{{source}}",
         "-d",
         rebase_path("//", root_build_dir),
         "-I",
         rebase_path("//", root_build_dir),
         "-o",
         rebase_path(root_gen_dir),
+        "--bytecode_path",
+        rebase_path("$root_gen_dir/mojo/public/tools/bindings"),
       ]
 
       if (defined(invoker.import_dirs)) {