utils/aot_snapshot.gni

# Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
# for details. 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/dart/dart_action.gni")
import("../sdk_args.gni")

_dart_root = get_path_info("..", "abspath")

template("aot_snapshot") {
  assert(defined(invoker.main_dart), "Must specify 'main_dart'")
  gen_kernel_args = []
  if (defined(invoker.gen_kernel_args)) {
    gen_kernel_args = invoker.gen_kernel_args
  }
  gen_snapshot_args = []
  if (defined(invoker.gen_snapshot_args)) {
    gen_snapshot_args = invoker.gen_snapshot_args
  }
  main_dart = invoker.main_dart
  name = target_name
  if (defined(invoker.name)) {
    name = invoker.name
  }
  extra_deps = []
  if (defined(invoker.deps)) {
    extra_deps += invoker.deps
  }
  extra_inputs = [ main_dart ]
  if (defined(invoker.inputs)) {
    extra_inputs += invoker.inputs
  }
  if (defined(invoker.dot_packages)) {
    dot_packages = invoker.dot_packages
  } else {
    dot_packages = rebase_path("$_dart_root/.dart_tool/package_config.json")
  }
  output = "$root_out_dir/$name.snapshot"
  if (defined(invoker.output)) {
    output = invoker.output
  }

  dill = "$target_gen_dir/$name.dart.dill"

  # Build the kernel file using the prebuilt VM to speed up the debug and
  # simulator builds.
  prebuilt_dart_action(target_name + "_dill") {
    if (defined(invoker.pool)) {
      pool = invoker.pool
    }
    deps = extra_deps + [
             "$_dart_root/runtime/vm:kernel_platform_files($host_toolchain)",
             "$_dart_root/runtime/vm:vm_platform",
             "$_dart_root/utils/gen_kernel:bootstrap_gen_kernel",
           ]
    gen_kernel_kernel =
        get_label_info("$_dart_root/utils/gen_kernel:bootstrap_gen_kernel",
                       "target_gen_dir") + "/bootstrap_gen_kernel.dill"
    platform_dill = "$root_out_dir/vm_platform_strong.dill"

    inputs = extra_inputs + [
               gen_kernel_kernel,
               platform_dill,
               main_dart,
               dot_packages,
             ]
    output = dill
    outputs = [ output ]

    depfile = "$output.d"

    vm_args = [
      # Ensure gen_kernel.dart will use this SDK hash when consuming/producing kernel.
      "-Dsdk_hash=$sdk_hash",
    ]

    script = gen_kernel_kernel

    args = [
      "--packages=" + rebase_path(dot_packages),
      "--platform=" + rebase_path(platform_dill),
      "--aot",
      "--output=" + rebase_path(output, root_build_dir),
      "--depfile=" + rebase_path(depfile),

      # Ensure the compiled appliation (e.g. kernel-service, frontend-server,
      # ...) will use this SDK hash when consuming/producing kernel.
      #
      # (Instead of ensuring every user of the "application_snapshot" /
      # "kernel_snapshot" passes this if needed, we always pass it)
      "-Dsdk_hash=$sdk_hash",
    ]
    args += gen_kernel_args
    args += [ rebase_path(main_dart) ]
  }

  # Create a snapshot from kernel built above.
  gen_snapshot_action(target_name) {
    if (defined(invoker.pool)) {
      pool = invoker.pool
    }
    deps = extra_deps + [ ":${target_name}_dill" ]

    inputs = extra_inputs

    outputs = [ output ]

    abs_output = rebase_path(output)

    vm_args = [
                "--deterministic",
                "--snapshot-kind=app-aot-elf",
                "--elf=$abs_output",
              ] + gen_snapshot_args

    args = [ rebase_path(dill) ]
  }
}