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

import sys

import shlex

import shutil

import Params

import Object

import pproc as subprocess

import optparse

import os.path

Params.g_autoconfig = 1

# the following two variables are used by the target "waf dist"

VERSION = file("VERSION").read().strip()

APPNAME = 'ns'

# these variables are mandatory ('/' are converted automatically)

srcdir = '.'

blddir = 'build'

def dist_hook(srcdir, blddir):

    shutil.rmtree("doc/html", True)

    shutil.rmtree("doc/latex", True)

def set_options(opt):

    def debug_option_callback(option, opt, value, parser):

        if value == 'debug':

            setattr(parser.values, option.dest, 'ultradebug')

        elif value == 'optimized':

            setattr(parser.values, option.dest, 'optimized')

        else:

            raise optparse.OptionValueError("allowed --debug-level values"

                                            " are debug, optimized.")

    opt.add_option('-d', '--debug-level',

                   action='callback',

                   type=str, dest='debug_level', default='debug',

                   help=('Specify the debug level, does nothing if CFLAGS is set'

                         ' in the environment. [Allowed Values: debug, optimized].'

                         ' WARNING: this option only has effect '

                         'with the configure command.'),

                   callback=debug_option_callback)

    # options provided by the modules

    opt.tool_options('compiler_cxx')

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

                   help=('Enable code coverage analysis.'

                         ' WARNING: this option only has effect '

                         'with the configure command.'),

                   action="store_true", default=False,

                   dest='enable_gcov')

    opt.add_option('--lcov-report',

                   help=('Generate a code coverage report '

                         '(use this option at build time, not in configure)'),

                   action="store_true", default=False,

                   dest='lcov_report')

    opt.add_option('--doxygen',

                   help=('Run doxygen to generate html documentation from source comments'),

                   action="store_true", default=False,

                   dest='doxygen')

    opt.add_option('--run',

                   help=('Run a locally built program; argument can be a program name,'

                         ' or a command starting with the program name.'),

                   type="string", default='', dest='run')

    opt.add_option('--command-template',

                   help=('Template of the command used to run the program given by --run;'

                         ' It should be a shell command string containing %s inside,'

                         ' which will be replaced by the actual program.'),

                   type="string", default=None, dest='command_template')

    opt.add_option('--shell',

                   help=('Run a shell with an environment suitably modified to run locally built programs'),

                   action="store_true", default=False,

                   dest='shell')

    # options provided in a script in a subdirectory named "src"

    opt.sub_options('src')

def configure(conf):

    if not conf.check_tool('compiler_cxx'):

        Params.fatal("No suitable compiler found")

    # create the second environment, set the variant and set its name

    variant_env = conf.env.copy()

    debug_level = Params.g_options.debug_level.lower()

    if debug_level == 'ultradebug':

        variant_name = 'debug'

    else:

        variant_name = debug_level

    if Params.g_options.enable_gcov:

        variant_name += '-gcov'

        variant_env.append_value('CCFLAGS', '-fprofile-arcs')

        variant_env.append_value('CCFLAGS', '-ftest-coverage')

        variant_env.append_value('CXXFLAGS', '-fprofile-arcs')

        variant_env.append_value('CXXFLAGS', '-ftest-coverage')

        variant_env.append_value('LINKFLAGS', '-fprofile-arcs')

    conf.env['NS3_ACTIVE_VARIANT'] = variant_name

    variant_env['NS3_ACTIVE_VARIANT'] = variant_name

    variant_env.set_variant(variant_name)

    conf.set_env_name(variant_name, variant_env)

    conf.setenv(variant_name)

    variant_env.append_value('CXXDEFINES', 'RUN_SELF_TESTS')

    if (os.path.basename(conf.env['CXX']).startswith("g++")

        and 'CXXFLAGS' not in os.environ):

        variant_env.append_value('CXXFLAGS', ['-Wall', '-Werror'])

    if 'debug' in Params.g_options.debug_level.lower():

        variant_env.append_value('CXXDEFINES', 'NS3_DEBUG_ENABLE')

        variant_env.append_value('CXXDEFINES', 'NS3_ASSERT_ENABLE')

    ## In optimized builds we still want debugging symbols, e.g. for

    ## profiling, and at least partially usable stack traces.

    if ('optimized' in Params.g_options.debug_level.lower() 

        and 'CXXFLAGS' not in os.environ):

        for flag in variant_env['CXXFLAGS_DEBUG']:

            ## this probably doesn't work for MSVC

            if flag.startswith('-g'):

                variant_env.append_value('CXXFLAGS', flag)

    if sys.platform == 'win32':

        if os.path.basename(conf.env['CXX']).startswith("g++"):

            variant_env.append_value("LINKFLAGS", "-Wl,--enable-runtime-pseudo-reloc")

    conf.sub_config('src')

def build(bld):

    variant_name = bld.env_of_name('default')['NS3_ACTIVE_VARIANT']

    variant_env = bld.env_of_name(variant_name)

    bld.m_allenvs['default'] = variant_env # switch to the active variant

    if Params.g_options.shell:

        run_shell()

        return

    # process subfolders from here

    bld.add_subdirs('src')

    bld.add_subdirs('samples utils examples')

def shutdown():

    #import UnitTest

    #ut = UnitTest.unit_test()

    #ut.change_to_testfile_dir = True

    #ut.want_to_see_test_output = True

    #ut.want_to_see_test_error = True

    #ut.run()

    #ut.print_results()

    if Params.g_commands['check']:

        run_program('run-tests')

    if Params.g_options.lcov_report:

        lcov_report()

    if Params.g_options.doxygen:

        doxygen()

    if Params.g_options.run:

        run_program(Params.g_options.run, Params.g_options.command_template)

        raise SystemExit(0)

    if Params.g_options.command_template:

        Params.fatal("Option --command-template requires the option --run to be given")

def _find_program(program_name, env):

    launch_dir = os.path.abspath(Params.g_cwd_launch)

    found_programs = []

    for obj in Object.g_allobjs:

        if obj.m_type != 'program' or not obj.target:

            continue

        ## filter out programs not in the subtree starting at the launch dir

        if not (obj.path.abspath().startswith(launch_dir)

                or obj.path.abspath(env).startswith(launch_dir)):

            continue

        found_programs.append(obj.target)

        if obj.target == program_name:

            return obj

    raise ValueError("program '%s' not found; available programs are: %r"

                     % (program_name, found_programs))

def _run_argv(argv):

    env = Params.g_build.env_of_name('default')

    if sys.platform == 'linux2':

        pathvar = 'LD_LIBRARY_PATH'

        pathsep = ':'

    elif sys.platform == 'darwin':

        pathvar = 'DYLD_LIBRARY_PATH'

        pathsep = ':'

    elif sys.platform == 'win32':

        pathvar = 'PATH'

        pathsep = ';'

    elif sys.platform == 'cygwin':

        pathvar = 'PATH'

        pathsep = ':'

    else:

        Params.warning(("Don't know how to configure "

                        "dynamic library path for the platform '%s'") % (sys.platform,))

        pathvar = None

        pathsep = None

    os_env = dict(os.environ)

    if pathvar is not None:

        if pathvar in os_env:

            os_env[pathvar] = pathsep.join([os_env[pathvar]] + list(env['NS3_MODULE_PATH']))

        else:

            os_env[pathvar] = pathsep.join(list(env['NS3_MODULE_PATH']))

    retval = subprocess.Popen(argv, env=os_env).wait()

    if retval:

        Params.fatal("Command %s exited with code %i" % (argv, retval))

def run_program(program_string, command_template=None):

    """

    if command_template is not None, then program_string == program

    name and argv is given by command_template with %s replaced by the

    full path to the program.  Else, program_string is interpreted as

    a shell command with first name being the program name.

    """

    env = Params.g_build.env_of_name('default')

    if command_template is None:

        argv = shlex.split(program_string)

        program_name = argv[0]

        try:

            program_obj = _find_program(program_name, env)

        except ValueError, ex:

            Params.fatal(str(ex))

        try:

            program_node, = program_obj.m_linktask.m_outputs

        except AttributeError:

            Params.fatal("%s does not appear to be a program" % (program_name,))

        execvec = [program_node.abspath(env)] + argv[1:]

    else:

        program_name = program_string

        try:

            program_obj = _find_program(program_name, env)

        except ValueError, ex:

            Params.fatal(str(ex))

        try:

            program_node, = program_obj.m_linktask.m_outputs

        except AttributeError:

            Params.fatal("%s does not appear to be a program" % (program_name,))

        execvec = shlex.split(command_template % (program_node.abspath(env),))

    former_cwd = os.getcwd()

    os.chdir(Params.g_cwd_launch)

    try:

        retval = _run_argv(execvec)

    finally:

        os.chdir(former_cwd)

    return retval

def run_shell():

    if sys.platform == 'win32':

        shell = os.environ.get("COMSPEC", "cmd.exe")

    else:

        shell = os.environ.get("SHELL", "/bin/sh")

    _run_argv([shell])

def doxygen():

    doxygen_config = os.path.join('doc', 'doxygen.conf')

    if subprocess.Popen(['doxygen', doxygen_config]).wait():

        raise SystemExit(1)

def lcov_report():

    env = Params.g_build.env_of_name('default')

    variant_name = env['NS3_ACTIVE_VARIANT']

    if 'gcov' not in variant_name:

        Params.fatal("project not configured for code coverage;"

                     " reconfigure with --enable-gcov")

    os.chdir(blddir)

    try:

        lcov_report_dir = os.path.join(variant_name, 'lcov-report')

        create_dir_command = "rm -rf " + lcov_report_dir

        create_dir_command += " && mkdir " + lcov_report_dir + ";"

        if subprocess.Popen(create_dir_command, shell=True).wait():

            raise SystemExit(1)

        info_file = os.path.join(lcov_report_dir, variant_name + '.info')

        lcov_command = "../utils/lcov/lcov -c -d . -o " + info_file

        lcov_command += " --source-dirs=" + os.getcwd()

        lcov_command += ":" + os.path.join(

            os.getcwd(), variant_name, 'include')

        if subprocess.Popen(lcov_command, shell=True).wait():

            raise SystemExit(1)

        genhtml_command = "../utils/lcov/genhtml -o " + lcov_report_dir

        genhtml_command += " " + info_file

        if subprocess.Popen(genhtml_command, shell=True).wait():

            raise SystemExit(1)

    finally:

        os.chdir("..")