# Copyright 2018 The Fuchsia 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/banjo/toolchain.gni")
import("//build/rust/toolchain.gni")

# Declares a BANJO library.
#
# Depending on the toolchain in which this targets is expanded, it will yield
# different results:
#   - in the BANJO toolchain, it will compile its source files into an
#     intermediate representation consumable by language bindings generators;
#   - in the target or shared toolchain, this will produce a source_set
#     containing C/C++ bindings.
#
# Parameters
#
#   sources (required)
#     List of paths to library source files.
#
#   name (optional)
#     Name of the library.
#     Defaults to the target's name.
#
#   sdk_category (optional)
#     Publication level of the library in SDKs.
#     See //build/sdk/sdk_atom.gni.

template("banjo") {
  if (defined(invoker.sdk_category)) {
    not_needed(invoker, [ "sdk_category" ])
  }
  if (current_toolchain == banjo_toolchain) {
    import("//build/banjo/banjo_library.gni")

    banjo_library(target_name) {
      forward_variables_from(invoker, "*")
    }
  } else if (current_toolchain == rust_toolchain) {
    import("//build/rust/banjo_rust.gni")

    banjo_rust(target_name) {
      forward_variables_from(invoker, "*")
    }
  } else if (is_fuchsia) {
    import("//build/c/banjo_c.gni")
    import("//build/rust/banjo_rust_library.gni")

    banjo_rust_library(target_name) {
      forward_variables_from(invoker, "*")
    }

    banjo_c_target(target_name) {
      forward_variables_from(invoker, "*")
    }
  } else {
    assert(false,
           "Unable to process BANJO target in toolchain $current_toolchain.")
  }
}

template("banjo_dummy") {
  if (defined(invoker.sdk_category)) {
    not_needed(invoker, [ "sdk_category" ])
  }
  if (current_toolchain == banjo_toolchain) {
    import("//build/banjo/banjo_library.gni")

    banjo_dummy_library(target_name) {
      forward_variables_from(invoker, "*")
    }
  } else if (current_toolchain == rust_toolchain) {
    import("//build/rust/banjo_rust.gni")

    banjo_rust(target_name) {
      forward_variables_from(invoker, "*")
    }
  } else if (is_fuchsia) {
    import("//build/c/banjo_c.gni")
    import("//build/rust/banjo_rust_library.gni")

    #
    # TODO(cramertj): remove pending TC-81.
    banjo_rust_library(target_name) {
      forward_variables_from(invoker, "*")
    }

    banjo_dummy_c_target(target_name) {
      forward_variables_from(invoker, "*")
    }
  } else {
    assert(false,
           "Unable to process BANJO target in toolchain $current_toolchain.")
  }
}