# Copyright 2015 The Native Client 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/config/nacl/config.gni")

# Generate a nmf file
#
# Native Client Manifest (nmf) is a JSON file that tells the browser where to
# download and load Native Client application files and libraries.
#
# Variables:
#   executables: .nexe/.pexe/.bc executables to generate nmf for
#   lib_prefix: path to prepend to shared libraries in the nmf
#   nmf: the name and the path of the output file
#   nmfflags: additional flags for the nmf generator
#   stage_dependencies: directory for staging libraries
template("generate_nmf") {
  assert(defined(invoker.executables), "Must define executables")
  assert(defined(invoker.nmf), "Must define nmf")

  action(target_name) {
    forward_variables_from(invoker,
                           [
                             "deps",
                             "data_deps",
                             "executables",
                             "lib_prefix",
                             "nmf",
                             "nmfflags",
                             "public_deps",
                             "stage_dependencies",
                             "testonly",
                             "visibility",
                           ])
    if (!defined(nmfflags)) {
      nmfflags = []
    }

    # TODO(phosek): Remove this conditional once
    # https://bugs.chromium.org/p/nativeclient/issues/detail?id=4339 is
    # resolved.
    if (current_cpu == "pnacl") {
      objdump = rebase_path("${nacl_toolchain_bindir}/x86_64-nacl-objdump")
    } else {
      objdump = rebase_path("${nacl_toolprefix}objdump")
    }
    if (host_os == "win") {
      objdump += ".exe"
    }

    script = "//native_client_sdk/src/tools/create_nmf.py"
    inputs = [ objdump ]
    sources = executables
    outputs = [ nmf ]
    if (is_nacl_glibc) {
      if (defined(stage_dependencies)) {
        nmfflags += [ "--stage-dependencies=" +
                      rebase_path(stage_dependencies, root_build_dir) ]
        lib_path = stage_dependencies
      } else {
        lib_path = root_build_dir
      }
      if (defined(lib_prefix)) {
        nmfflags += [ "--lib-prefix=" + lib_prefix ]
        lib_path += "/${lib_prefix}"
      }

      # Starts empty so the code below can use += everywhere.
      data = []

      nmfflags +=
          [ "--library-path=" + rebase_path(root_out_dir, root_build_dir) ]

      # NOTE: There is no explicit dependency for the lib directory
      # (lib32 and lib64 for x86/x64) created in the product directory.
      # They are created as a side-effect of nmf creation.
      if (current_cpu != "x86" && current_cpu != "x64") {
        nmfflags +=
            [ "--library-path=" +
              rebase_path("${nacl_toolchain_tooldir}/lib", root_build_dir) ]
        if (current_cpu == "arm") {
          data += [ "${lib_path}/libarm/" ]
        } else {
          data += [ "${lib_path}/lib/" ]
        }
      } else {
        # For x86-32, the lib/ directory is called lib32/ instead.
        if (current_cpu == "x86") {
          nmfflags +=
              [ "--library-path=" +
                rebase_path("${nacl_toolchain_tooldir}/lib32", root_build_dir) ]
          data += [ "${lib_path}/lib32/" ]
        }

        # x86-32 Windows needs to build both x86-32 and x86-64 NaCl
        # binaries into the same nmf covering both architectures.  That
        # gets handled at a higher level (see the nacl_test_data template),
        # so a single generate_nmf invocation gets both x86-32 and x86-64
        # nexes listed in executables.
        if (current_cpu == "x64" || target_os == "win") {
          # For x86-64, the lib/ directory is called lib64/ instead
          # when copied by create_nmf.py.
          glibc_tc = "//build/toolchain/nacl:glibc"
          assert(current_toolchain == "${glibc_tc}_${current_cpu}")
          if (current_cpu == "x64") {
            x64_out_dir = root_out_dir
          } else {
            x64_out_dir = get_label_info(":${target_name}(${glibc_tc}_x64)",
                                         "root_out_dir")
          }
          nmfflags += [
            "--library-path=" + rebase_path(x64_out_dir, root_build_dir),
            "--library-path=" +
                rebase_path("${nacl_toolchain_tooldir}/lib", root_build_dir),
          ]
          data += [ "${lib_path}/lib64/" ]
        }
      }
    }
    args = [
             "--no-default-libpath",
             "--objdump=" + rebase_path(objdump, root_build_dir),
             "--output=" + rebase_path(nmf, root_build_dir),
           ] + nmfflags + rebase_path(sources, root_build_dir)
    if (is_nacl_glibc && current_cpu == "arm") {
      deps += [ "//native_client/src/untrusted/elf_loader:elf_loader" ]
    }
  }
}