Add a snapshot of flutter/engine/src/build to our sdk

build/secondary/tools/grit/grit_rule.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.
+
+# Instantiate grit. This will produce a script target to run grit, and a
+# static library that compiles the .cc files.
+#
+# Parameters
+#
+#   source (required)
+#       Path to .grd file.
+#
+#   outputs (required)
+#       List of outputs from grit, relative to the target_gen_dir. Grit will
+#       verify at build time that this list is correct and will fail if there
+#       is a mismatch between the outputs specified by the .grd file and the
+#       outputs list here.
+#
+#       To get this list, you can look in the .grd file for
+#       <output filename="..." and put those filename here. The base directory
+#       of the list in Grit and the output list specified in the GN grit target
+#       are the same (the target_gen_dir) so you can generally copy the names
+#       exactly.
+#
+#       To get the list of outputs programatically, run:
+#           python tools/grit/grit_info.py --outputs . path/to/your.grd
+#       And strip the leading "./" from the output files.
+#
+#   defines (optional)
+#       Extra defines to pass to grit (on top of the global grit_defines list).
+#
+#   grit_flags (optional)
+#       List of strings containing extra command-line flags to pass to Grit.
+#
+#   resource_ids (optional)
+#       Path to a grit "firstidsfile". Default is
+#       //tools/gritsettings/resource_ids. Set to "" to use the value specified
+#       in the <grit> nodes of the processed files.
+#
+#   output_dir (optional)
+#       Directory for generated files. If you specify this, you will often
+#       want to specify output_name if the target name is not particularly
+#       unique, since this can cause files from multiple grit targets to
+#       overwrite each other.
+#
+#   output_name (optiona)
+#       Provide an alternate base name for the generated files, like the .d
+#       files. Normally these are based on the target name and go in the
+#       output_dir, but if multiple targets with the same name end up in
+#       the same output_dir, they can collide.
+#
+#   depfile_dir (optional)
+#       If set, used to store the depfile and corresponding stamp file.
+#       Defaults to output_dir
+#
+#   use_qualified_include (optional)
+#       If set, output_dir is not added to include_dirs.
+#
+#   configs (optional)
+#       List of additional configs to be applied to the generated target.
+#   deps  (optional)
+#   inputs  (optional)
+#       List of additional files, required for grit to process source file.
+#   visibility  (optional)
+#       Normal meaning.
+#
+# Example
+#
+#   grit("my_resources") {
+#     # Source and outputs are required.
+#     source = "myfile.grd"
+#     outputs = [
+#       "foo_strings.h",
+#       "foo_strings.pak",
+#     ]
+#
+#     grit_flags = [ "-E", "foo=bar" ]  # Optional extra flags.
+#     # You can also put deps here if the grit source depends on generated
+#     # files.
+#   }
+import("//build/config/chrome_build.gni")
+import("//build/config/crypto.gni")
+import("//build/config/features.gni")
+import("//build/config/ui.gni")
+
+grit_defines = []
+
+# Mac and iOS want Title Case strings.
+use_titlecase_in_grd_files = is_mac || is_ios
+if (use_titlecase_in_grd_files) {
+  grit_defines += [
+    "-D",
+    "use_titlecase",
+  ]
+}
+
+if (is_chrome_branded) {
+  grit_defines += [
+    "-D",
+    "_google_chrome",
+    "-E",
+    "CHROMIUM_BUILD=google_chrome",
+  ]
+} else {
+  grit_defines += [
+    "-D",
+    "_chromium",
+    "-E",
+    "CHROMIUM_BUILD=chromium",
+  ]
+}
+
+if (is_chromeos) {
+  grit_defines += [
+    "-D",
+    "chromeos",
+    "-D",
+    "scale_factors=2x",
+  ]
+}
+
+if (is_desktop_linux) {
+  grit_defines += [
+    "-D",
+    "desktop_linux",
+  ]
+}
+
+if (toolkit_views) {
+  grit_defines += [
+    "-D",
+    "toolkit_views",
+  ]
+}
+
+if (use_aura) {
+  grit_defines += [
+    "-D",
+    "use_aura",
+  ]
+}
+
+if (use_ash) {
+  grit_defines += [
+    "-D",
+    "use_ash",
+  ]
+}
+
+if (use_nss_certs) {
+  grit_defines += [
+    "-D",
+    "use_nss_certs",
+  ]
+}
+
+if (use_ozone) {
+  grit_defines += [
+    "-D",
+    "use_ozone",
+  ]
+}
+
+if (enable_image_loader_extension) {
+  grit_defines += [
+    "-D",
+    "image_loader_extension",
+  ]
+}
+
+if (enable_remoting) {
+  grit_defines += [
+    "-D",
+    "remoting",
+  ]
+}
+
+if (is_android) {
+  grit_defines += [
+    "-t",
+    "android",
+    "-E",
+    "ANDROID_JAVA_TAGGED_ONLY=true",
+  ]
+}
+
+if (is_mac || is_ios) {
+  grit_defines += [
+    "-D",
+    "scale_factors=2x",
+  ]
+}
+
+if (is_ios) {
+  grit_defines += [
+    "-t",
+    "ios",
+
+    # iOS uses a whitelist to filter resources.
+    "-w",
+    rebase_path("//build/ios/grit_whitelist.txt", root_build_dir),
+  ]
+}
+
+if (enable_extensions) {
+  grit_defines += [
+    "-D",
+    "enable_extensions",
+  ]
+}
+if (enable_media_router) {
+  grit_defines += [
+    "-D",
+    "enable_media_router",
+  ]
+}
+if (enable_plugins) {
+  grit_defines += [
+    "-D",
+    "enable_plugins",
+  ]
+}
+if (enable_basic_printing || enable_print_preview) {
+  grit_defines += [
+    "-D",
+    "enable_printing",
+  ]
+  if (enable_print_preview) {
+    grit_defines += [
+      "-D",
+      "enable_print_preview",
+    ]
+  }
+}
+if (enable_themes) {
+  grit_defines += [
+    "-D",
+    "enable_themes",
+  ]
+}
+if (enable_app_list) {
+  grit_defines += [
+    "-D",
+    "enable_app_list",
+  ]
+}
+if (enable_settings_app) {
+  grit_defines += [
+    "-D",
+    "enable_settings_app",
+  ]
+}
+if (enable_google_now) {
+  grit_defines += [
+    "-D",
+    "enable_google_now",
+  ]
+}
+
+# Note: use_concatenated_impulse_responses is omitted. It is never used and
+# should probably be removed from GYP build.
+if (enable_webrtc) {
+  grit_defines += [
+    "-D",
+    "enable_webrtc",
+  ]
+}
+if (enable_hangout_services_extension) {
+  grit_defines += [
+    "-D",
+    "enable_hangout_services_extension",
+  ]
+}
+if (enable_task_manager) {
+  grit_defines += [
+    "-D",
+    "enable_task_manager",
+  ]
+}
+if (enable_notifications) {
+  grit_defines += [
+    "-D",
+    "enable_notifications",
+  ]
+}
+if (enable_wifi_bootstrapping) {
+  grit_defines += [
+    "-D",
+    "enable_wifi_bootstrapping",
+  ]
+}
+if (enable_service_discovery) {
+  grit_defines += [
+    "-D",
+    "enable_service_discovery",
+  ]
+}
+if (mac_views_browser) {
+  grit_defines += [
+    "-D",
+    "mac_views_browser",
+  ]
+}
+
+grit_resource_id_file = "//tools/gritsettings/resource_ids"
+grit_info_script = "//tools/grit/grit_info.py"
+
+template("grit") {
+  assert(defined(invoker.source),
+         "\"source\" must be defined for the grit template $target_name")
+
+  grit_inputs = [ invoker.source ]
+
+  if (defined(invoker.resource_ids)) {
+    resource_ids = invoker.resource_ids
+  } else {
+    resource_ids = grit_resource_id_file
+  }
+  if (resource_ids != "") {
+    # The script depends on the ID file. Only add this dependency if the ID
+    # file is specified.
+    grit_inputs += [ resource_ids ]
+  }
+
+  if (defined(invoker.output_dir)) {
+    output_dir = invoker.output_dir
+  } else {
+    output_dir = target_gen_dir
+  }
+
+  if (defined(invoker.output_name)) {
+    grit_output_name = invoker.output_name
+  } else {
+    grit_output_name = target_name
+  }
+
+  if (defined(invoker.depfile_dir)) {
+    depfile_dir = invoker.depfile_dir
+  } else {
+    depfile_dir = output_dir
+  }
+
+  # These are all passed as arguments to the script so have to be relative to
+  # the build directory.
+  if (resource_ids != "") {
+    resource_ids = rebase_path(resource_ids, root_build_dir)
+  }
+  rebased_output_dir = rebase_path(output_dir, root_build_dir)
+  source_path = rebase_path(invoker.source, root_build_dir)
+
+  if (defined(invoker.grit_flags)) {
+    grit_flags = invoker.grit_flags
+  } else {
+    grit_flags = []  # These are optional so default to empty list.
+  }
+
+  assert_files_flags = []
+
+  # We want to make sure the declared outputs actually match what Grit is
+  # writing. We write the list to a file (some of the output lists are long
+  # enough to not fit on a Windows command line) and ask Grit to verify those
+  # are the actual outputs at runtime.
+  asserted_list_file =
+      "$target_out_dir/${grit_output_name}_expected_outputs.txt"
+  write_file(asserted_list_file,
+             rebase_path(invoker.outputs, root_build_dir, output_dir))
+  assert_files_flags += [ "--assert-file-list=" +
+                          rebase_path(asserted_list_file, root_build_dir) ]
+  grit_outputs =
+      get_path_info(rebase_path(invoker.outputs, ".", output_dir), "abspath")
+
+  # The config and the action below get this visibility son only the generated
+  # source set can depend on them. The variable "target_name" will get
+  # overwritten inside the inner classes so we need to compute it here.
+  target_visibility = [ ":$target_name" ]
+
+  # The current grit setup makes an file in $output_dir/grit/foo.h that
+  # the source code expects to include via "grit/foo.h". It would be nice to
+  # change this to including absolute paths relative to the root gen directory
+  # (like "mycomponent/foo.h"). This config sets up the include path.
+  grit_config = target_name + "_grit_config"
+  config(grit_config) {
+    if (!defined(invoker.use_qualified_include) ||
+        !invoker.use_qualified_include) {
+      include_dirs = [ output_dir ]
+    }
+    visibility = target_visibility
+  }
+
+  grit_custom_target = target_name + "_grit"
+  action(grit_custom_target) {
+    script = "//tools/grit/grit.py"
+    inputs = grit_inputs
+
+    depfile = "$depfile_dir/${grit_output_name}_stamp.d"
+    outputs = [ "${depfile}.stamp" ] + grit_outputs
+
+    args = [
+      "-i",
+      source_path,
+      "build",
+    ]
+    if (resource_ids != "") {
+      args += [
+        "-f",
+        resource_ids,
+      ]
+    }
+    args += [
+              "-o",
+              rebased_output_dir,
+              "--depdir",
+              ".",
+              "--depfile",
+              rebase_path(depfile, root_build_dir),
+              "--write-only-new=1",
+              "--depend-on-stamp",
+            ] + grit_defines
+
+    # Add extra defines with -D flags.
+    if (defined(invoker.defines)) {
+      foreach(i, invoker.defines) {
+        args += [
+          "-D",
+          i,
+        ]
+      }
+    }
+
+    args += grit_flags + assert_files_flags
+
+    if (defined(invoker.visibility)) {
+      # This needs to include both what the invoker specified (since they
+      # probably include generated headers from this target), as well as the
+      # generated source set (since there's no guarantee that the visibility
+      # specified by the invoker includes our target).
+      #
+      # Only define visibility at all if the invoker specified it. Otherwise,
+      # we want to keep the public "no visibility specified" default.
+      visibility = target_visibility + invoker.visibility
+    }
+
+    deps = [
+      "//tools/grit:grit_sources",
+    ]
+    if (defined(invoker.deps)) {
+      deps += invoker.deps
+    }
+    if (defined(invoker.inputs)) {
+      inputs += invoker.inputs
+    }
+  }
+
+  # This is the thing that people actually link with, it must be named the
+  # same as the argument the template was invoked with.
+  source_set(target_name) {
+    # Since we generate a file, we need to be run before the targets that
+    # depend on us.
+    sources = grit_outputs
+
+    # Deps set on the template invocation will go on the action that runs
+    # grit above rather than this library. This target needs to depend on the
+    # action publicly so other scripts can take the outputs from the grit
+    # script as inputs.
+    public_deps = [
+      ":$grit_custom_target",
+    ]
+    public_configs = [ ":$grit_config" ]
+
+    if (defined(invoker.public_configs)) {
+      public_configs += invoker.public_configs
+    }
+
+    if (defined(invoker.configs)) {
+      configs += invoker.configs
+    }
+
+    if (defined(invoker.visibility)) {
+      visibility = invoker.visibility
+    }
+    output_name = grit_output_name
+  }
+}