# 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("//build/compiled_action.gni")

template("shader_archive") {
  assert(defined(invoker.shaders),
         "The shaders to build the library from must be specified.")
  assert(defined(invoker.deps), "Target dependencies must be specified.")

  output_file = "$target_gen_dir/$target_name.shar"
  compiled_action(target_name) {
    mnemonic = "SHADER_ARCHIVE"
    tool = "//flutter/impeller/shader_archive:shader_archiver"
    inputs = invoker.shaders
    outputs = [ output_file ]
    output_path_rebased = rebase_path(output_file, root_build_dir)
    args = [ "--output=$output_path_rebased" ]
    if (defined(invoker.entry_point_prefix)) {
      args += [ "--entry-point-prefix=${invoker.entry_point_prefix}" ]
    }
    foreach(shader, invoker.shaders) {
      shader_path = rebase_path(shader, root_build_dir)
      args += [ "--input=$shader_path" ]
    }
    deps = invoker.deps
  }
}