## -*- Mode: python; py-indent-offset: 4; indent-tabs-mode: nil; coding: utf-8; -*-

import os, os.path

import shutil

import types

import Action

import Common

import Object

import Params

all_modules = (

    'core',

    'common',

    'simulator',

    'node',

    'internet-node',

    'devices/point-to-point',

    'devices/csma',

    'applications',

    'routing/global-routing',

    'mobility',

    )

def set_options(opt):

    opt.sub_options('simulator')

    opt.add_option('--enable-rpath',

                   help=("Link programs with rpath"

                         " (normally not needed, see "

                         " --run and --shell; moreover, only works in some"

                         " specific platforms, such as Linux and Solaris)"),

                   action="store_true", dest='enable_rpath', default=False)

def configure(conf):

    conf.sub_config('core')

    conf.sub_config('simulator')

    blddir = os.path.abspath(os.path.join(conf.m_blddir, conf.env.variant()))

    conf.env['NS3_MODULE_PATH'] = [os.path.join(blddir, 'src')]

    for module in all_modules:

        module_path = os.path.join(blddir, 'src', module)

        if Params.g_options.enable_rpath:

            conf.env.append_value('RPATH', '-Wl,-rpath=%s' % (module_path,))

    ## Used to link the 'run-tests' program with all of ns-3 code

    conf.env['NS3_MODULES'] = ['ns3-' + module.split('/')[-1] for module in all_modules]

def create_ns3_module(bld, name, dependencies=()):

    module = bld.create_obj('cpp', 'objects')

    module.name = 'ns3-' + name

    module.target = module.name

    module.add_objects = ['ns3-' + dep for dep in dependencies]

    module.env.append_value('CXXFLAGS', module.env['shlib_CXXFLAGS'])

    return module

def build(bld):

    Object.register('ns3header', Ns3Header)

    Action.Action('ns3header', func=_ns3_headers_inst, color='BLUE')

    bld.create_ns3_module = types.MethodType(create_ns3_module, bld)

    bld.add_subdirs(list(all_modules))

    ## Create a single ns3 library containing all modules

    lib = bld.create_obj('cpp', 'shlib')

    lib.name = 'ns3'

    lib.target = 'ns3'

    lib.add_objects = list(bld.env_of_name('default')['NS3_MODULES'])

class Ns3Header(Object.genobj):

    """A set of NS-3 header files"""

    def __init__(self, env=None):

        Object.genobj.__init__(self, 'other')

        self.inst_var = 'INCLUDEDIR'

        self.inst_dir = 'ns3'

        self.env = env

        if not self.env:

            self.env = Params.g_build.m_allenvs['default']

    def apply(self):

        ns3_dir_node = Params.g_build.m_srcnode.find_dir("ns3")

        for filename in self.to_list(self.source):

            src_node = self.path.find_source(filename)

            if src_node is None:

                Params.fatal("source ns3 header file %s not found" % (filename,))

            dst_node = ns3_dir_node.find_build(os.path.basename(filename))

            assert dst_node is not None

            task = self.create_task('ns3header', self.env, 1)

            task.set_inputs([src_node])

            task.set_outputs([dst_node])

    def install(self):

        for i in self.m_tasks:

            current = Params.g_build.m_curdirnode

            lst = map(lambda a: a.relpath_gen(current), i.m_outputs)

            Common.install_files(self.inst_var, self.inst_dir, lst)

def _ns3_headers_inst(task):

    assert len(task.m_inputs) == len(task.m_outputs)

    inputs = [node.srcpath(task.m_env) for node in task.m_inputs]

    outputs = [node.bldpath(task.m_env) for node in task.m_outputs]

    for src, dst in zip(inputs, outputs):

        try:

            os.chmod(dst, 0600)

        except OSError:

            pass

        shutil.copy2(src, dst)

        ## make the headers in builddir read-only, to prevent

        ## accidental modification

        os.chmod(dst, 0400)

    return 0