# Copyright 2019 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

# GN template to generate static library for given Wayland protorol description files.
# Parameters:
#   sources
#       Wayland protocol description XML file paths.
#   out_dir (optional)
#       Directory to output generated source files. Relative to gen/ directory.
template("wayland_protocol_library") {
  forward_variables_from(invoker, [ "out_dir" ])
  if (!defined(out_dir)) {
    out_dir = "."
  }
  wayland_dir = "${root_gen_dir}/${out_dir}"

  generators = [
    {
      subcommand = "code"
      output_suffix = "-protocol.c"
    },
    {
      subcommand = "client-header"
      output_suffix = "-client-protocol.h"
    },
    {
      subcommand = "server-header"
      output_suffix = "-server-protocol.h"
    },
  ]
  generator_actions = []
  foreach(g, generators) {
    action_name = "${target_name}_${g.subcommand}"
    generator_actions += [ ":" + action_name ]
    action_foreach(action_name) {
      sources = invoker.sources
      script = "//common-mk/file_generator_wrapper.py"
      output_file = "${wayland_dir}/{{source_name_part}}${g.output_suffix}"
      outputs = [
        output_file,
      ]
      args = [
        "wayland-scanner",
        g.subcommand,
        "{{source}}",
        output_file,
      ]
    }
  }

  static_library(target_name) {
    if (defined(invoker.configs)) {
      configs += invoker.configs
    }
    deps = generator_actions
    sources = []
    foreach(t, deps) {
      sources += get_target_outputs(t)
    }
    if (defined(invoker.deps)) {
      deps += invoker.deps
    }
  }
}