tools/fuchsia/dart_kernel.gni

# Copyright 2013 The Flutter 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("//flutter/common/fuchsia_config.gni")
import("//flutter/tools/fuchsia/dart.gni")
import("//third_party/dart/build/dart/dart_action.gni")

template("dart_kernel") {
  prebuilt_dart_action(target_name) {
    assert(defined(invoker.main_dart), "main_dart is a required parameter.")
    assert(defined(invoker.kernel_platform_files),
           "kernel_platform_files target must be defined.")

    main_dart = rebase_path(invoker.main_dart)

    deps = [ invoker.kernel_platform_files ]

    gen_kernel_script = "//third_party/dart/pkg/vm/bin/gen_kernel.dart"
    platform_dill = "$root_out_dir/dart_runner_patched_sdk/platform_strong.dill"

    dot_packages =
        rebase_path("//third_party/dart/.dart_tool/package_config.json")

    inputs = [
      platform_dill,
      gen_kernel_script,
      main_dart,
      dot_packages,
    ]

    output = "$target_gen_dir/$target_name.dill"
    outputs = [ output ]

    depfile = "$output.d"
    abs_depfile = rebase_path(depfile)
    rebased_output = rebase_path(output, root_build_dir)
    vm_args = [
      "--depfile=$abs_depfile",
      "--depfile_output_filename=$rebased_output",
    ]

    script = gen_kernel_script

    args = [
      "--packages=" + rebase_path(dot_packages),
      "--target=dart_runner",
      "--platform=" + rebase_path(platform_dill),
      "--output=" + rebase_path(output),
    ]

    if (flutter_runtime_mode == "debug") {
      args += [ "--embed-sources" ]
    } else {
      args += [ "--no-embed-sources" ]
    }

    if (defined(invoker.aot) && invoker.aot) {
      args += [
        "--aot",
        "--tfa",
      ]
    } else {
      # --no-link-platform is only valid when --aot isn't specified
      args += [ "--no-link-platform" ]
    }

    if (defined(invoker.product) && invoker.product) {
      # Setting this flag in a non-product release build for AOT (a "profile"
      # build) causes the vm service isolate code to be tree-shaken from an app.
      # See the pragma on the entrypoint here:
      #
      # https://github.com/dart-lang/sdk/blob/main/sdk/lib/_internal/vm/bin/vmservice_io.dart#L240
      #
      # Also, this define excludes debugging and profiling code from Flutter.
      args += [ "-Ddart.vm.product=true" ]
    } else {
      if (flutter_runtime_mode == "profile") {
        # The following define excludes debugging code from Flutter.
        args += [ "-Ddart.vm.profile=true" ]
      }
    }

    args += [ rebase_path(main_dart) ]
  }
}