# 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/util/java_action.gni")

declare_args() {
  # Control whether the JavaScript files shipped with Chrome on iOS are
  # compiled with closure_compiler or not. Useful for debugging.
  compile_javascript = true
}

closure_compiler_path = "//third_party/closure_compiler/compiler/compiler.jar"

# Defines a target that create a JavaScript bundle using the closure compiler.
#
# Variables
#   sources:
#     List of JavaScript files to compile into the bundle.
#
#   closure_entry_point:
#     Name of the entry point closure module.
#
#   deps (optional)
#     List of targets required by this target.
#
#   visibility (optional)
#     Visibility restrictions.
#
# Generates a single JavaScript bundle file that can be put in the application
# bundle.
#
# TODO(crbug.com/487804): once all errors have been fixed, sync with the flags
# from third_party/closure_compiler/closure_args.gni.
template("js_compile_bundle") {
  assert(defined(invoker.sources),
         "Need sources in $target_name listing the js files.")

  assert(defined(invoker.closure_entry_point),
         "Need closure_entry_point in $target_name for generated js file.")

  _target_name = target_name
  compile_js_target_name = target_name + "_compile_js"

  java_action(compile_js_target_name) {
    visibility = [ ":$_target_name" ]
    script = closure_compiler_path
    sources = invoker.sources
    outputs = [
      "$target_gen_dir/$_target_name.js",
    ]

    args = [
             "--compilation_level",
             "SIMPLE_OPTIMIZATIONS",
             "--js_output_file",
             rebase_path("$target_gen_dir/$_target_name.js", root_build_dir),
             "--only_closure_dependencies",
             "--closure_entry_point",
             invoker.closure_entry_point,
             "--js",
           ] + rebase_path(sources, root_build_dir)
  }

  bundle_data(target_name) {
    forward_variables_from(invoker,
                           [
                             "data_deps",
                             "deps",
                             "public_deps",
                             "visibility",
                           ])

    if (!defined(public_deps)) {
      public_deps = []
    }
    public_deps += [ ":$compile_js_target_name" ]
    sources = get_target_outputs(":$compile_js_target_name")
    outputs = [
      "{{bundle_resources_dir}}/{{source_file_part}}",
    ]
  }
}

# Defines a target that compile JavaScript files with error checking using the
# closure compiler.
#
# Variables
#   sources:
#     List of JavaScript files to compile.
#
#   deps (optional)
#     List of targets required by this target.
#
#   visibility (optional)
#     Visibility restrictions.
#
# TODO(crbug.com/487804): once all errors have been fixed, sync with the flags
# from third_party/closure_compiler/closure_args.gni.
template("js_compile_checked") {
  assert(defined(invoker.sources),
         "Need sources in $target_name listing the js files.")

  if (compile_javascript) {
    _target_name = target_name
    compile_js_target_name = target_name + "_compile_js"

    java_action_foreach(compile_js_target_name) {
      visibility = [ ":$_target_name" ]
      script = closure_compiler_path
      sources = invoker.sources
      outputs = [
        "$target_gen_dir/{{source_file_part}}",
      ]

      # TODO(crbug.com/487804): need to enable the following compilation checks
      # once the corresponding errors have been fixed:
      #   --jscomp_error=checkTypes
      #   --jscomp_error=checkVars
      #   --jscomp_error=missingProperties
      #   --jscomp_error=missingReturn
      #   --jscomp_error=undefinedVars

      args = [
        "--compilation_level",
        "SIMPLE_OPTIMIZATIONS",
        "--jscomp_error=accessControls",
        "--jscomp_error=ambiguousFunctionDecl",
        "--jscomp_error=constantProperty",
        "--jscomp_error=deprecated",
        "--jscomp_error=externsValidation",
        "--jscomp_error=globalThis",
        "--jscomp_error=invalidCasts",
        "--jscomp_error=nonStandardJsDocs",
        "--jscomp_error=suspiciousCode",
        "--jscomp_error=undefinedNames",
        "--jscomp_error=unknownDefines",
        "--jscomp_error=uselessCode",
        "--jscomp_error=visibility",
        "--js",
        "{{source}}",
        "--js_output_file",
        rebase_path("$target_gen_dir/{{source_file_part}}", root_build_dir),
      ]
    }

    bundle_data(target_name) {
      forward_variables_from(invoker,
                             [
                               "data_deps",
                               "deps",
                               "public_deps",
                               "visibility",
                             ])

      if (!defined(public_deps)) {
        public_deps = []
      }
      public_deps += [ ":$compile_js_target_name" ]
      sources = get_target_outputs(":$compile_js_target_name")
      outputs = [
        "{{bundle_resources_dir}}/{{source_file_part}}",
      ]
    }
  } else {
    bundle_data(target_name) {
      forward_variables_from(invoker,
                             [
                               "data_deps",
                               "deps",
                               "public_deps",
                               "visibility",
                             ])

      sources = invoker.sources
      outputs = [
        "{{bundle_resources_dir}}/{{source_file_part}}",
      ]
    }
  }
}

# Defines a target that compile JavaScript files without error checking using
# the closure compiler.
#
# Variables
#   sources:
#     List of JavaScript files to compile.
#
#   deps (optional)
#     List of targets required by this target.
#
#   visibility (optional)
#     Visibility restrictions.
#
# TODO(crbug.com/487804): once all errors have been fixed, remove this template
# and port all code to use js_compile_checked instead.
template("js_compile_unchecked") {
  assert(defined(invoker.sources),
         "Need sources in $target_name listing the js files.")

  if (compile_javascript) {
    _target_name = target_name
    compile_js_target_name = target_name + "_compile_js"

    java_action_foreach(compile_js_target_name) {
      visibility = [ ":$_target_name" ]
      script = closure_compiler_path
      sources = invoker.sources
      outputs = [
        "$target_gen_dir/{{source_file_part}}",
      ]

      args = [
        "--compilation_level",
        "SIMPLE_OPTIMIZATIONS",
        "--js",
        "{{source}}",
        "--js_output_file",
        rebase_path("$target_gen_dir/{{source_file_part}}", root_build_dir),
      ]
    }

    bundle_data(target_name) {
      forward_variables_from(invoker,
                             [
                               "data_deps",
                               "deps",
                               "public_deps",
                               "visibility",
                             ])

      if (!defined(public_deps)) {
        public_deps = []
      }
      public_deps += [ ":$compile_js_target_name" ]
      sources = get_target_outputs(":$compile_js_target_name")
      outputs = [
        "{{bundle_resources_dir}}/{{source_file_part}}",
      ]
    }
  } else {
    bundle_data(target_name) {
      forward_variables_from(invoker,
                             [
                               "data_deps",
                               "deps",
                               "public_deps",
                               "visibility",
                             ])

      sources = invoker.sources
      outputs = [
        "{{bundle_resources_dir}}/{{source_file_part}}",
      ]
    }
  }
}