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

# Copyright (c) 2006 INRIA

# All rights reserved.

#

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License version 2 as

# published by the Free Software Foundation;

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

#

# Author: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>

import os

import os.path

import shutil

from SCons.Environment import Environment

from SCons.Builder import Builder

from SCons.Action import Action

import SCons

# hack stolen from wengo

# to get an ARGUMENTS defined correctly

try:

    ARGUMENTS = SCons.Script.ARGUMENTS

    COMMAND_LINE_TARGETS = SCons.Script.COMMAND_LINE_TARGETS

except AttributeError:

    from SCons.Script.SConscript import Arguments

    from SCons.Script.SConscript import CommandLineTargets

    ARGUMENTS = Arguments

    COMMAND_LINE_TARGETS = CommandLineTargets

class Ns3Module:

    def __init__(self, name, dir):

        self.sources = []

        self.inst_headers = []

        self.headers = []

        self.extra_dist = []

        self.deps = []

        self.external_deps = []

        self.config = []

        self.name = name

        self.dir = dir

        self.executable = False

        self.library = True

    def set_library(self):

        self.library = True

        self.executable = False

    def set_executable(self):

        self.library = False

        self.executable = True

    def add_config(self, config_fn):

        self.config.append(config_fn)

    def add_extra_dist(self, dist):

        self.extra_dist.append(dist)

    def add_external_dep(self, dep):

        self.external_deps.append(dep)

    def add_dep(self, dep):

        self.deps.append(dep)

    def add_deps(self, deps):

        self.deps.extend(deps)

    def add_source(self, source):

        self.sources.append(source)

    def add_sources(self, sources):

        self.sources.extend(sources)

    def add_header(self, header):

        self.headers.append(header)

    def add_headers(self, headers):

        self.headers.extend(headers)

    def add_inst_header(self, header):

        self.inst_headers.append(header)

    def add_inst_headers(self, headers):

        self.inst_headers.extend(headers)

def MyCopyAction(target, source, env):

    try:

        if len(target) == len(source):

            for i in range(len(target)):

                shutil.copy(source[i].path, target[i].path)

            return 0

        else:

            return 'invalid target/source match'

    except:

        print

        return 'exception'

def MyCopyActionPrint(target, source, env):

    if len(target) == len(source):

        output = ''

        for i in range(len(target)):

            output = output + 'copy \'' + source[i].path + '\' to \'' + target[i].path + '\''

            if i < len(target) - 1:

                output = output + '\n'

        return output

    else:

        return 'error in copy'

def GcxxEmitter(target, source, env):

    if os.path.exists(source[0].path):

        return [target, source]

    else:

        return [[], []]

def MyRmTree(target, source, env):

    shutil.rmtree(env['RM_DIR'])

    return 0

def MyRmTreePrint(target, source, env):

    return ''

def print_cmd_line(s, target, src, env):

    print 'Building ' + (' and '.join([str(x) for x in target])) + '...'

class Ns3BuildVariant:

    def __init__(self):

        self.static = False

        self.gcxx_deps = False

        self.gcxx_root = ''

        self.build_root = ''

        self.env = None

class Ns3:

    def __init__(self):

        self.__modules = []

        self.extra_dist = []

        self.build_dir = 'build'

        self.version = '0.0.1'

        self.name = 'noname'

        self.doxygen_config = ''

    def add(self, module):

        self.__modules.append(module)

    def add_extra_dist(self, dist):

        self.extra_dist.append(dist)

    def __get_module(self, name):

        for module in self.__modules:

            if module.name == name:

                return module

        return None

    def get_mod_output(self, module, variant):

        if module.executable:

            suffix = variant.env.subst(variant.env['PROGSUFFIX'])

            filename = os.path.join(variant.build_root, 'bin', 

                                    module.name + suffix)

        else:

            if variant.static:

                prefix = variant.env['LIBPREFIX']

                suffix = variant.env['LIBSUFFIX']

            else:

                prefix = variant.env['SHLIBPREFIX']

                suffix = variant.env['SHLIBSUFFIX']

            prefix = variant.env.subst(prefix)

            suffix = variant.env.subst(suffix)

            filename = os.path.join(variant.build_root, 'lib', 

                                     prefix + module.name + suffix)

        return filename

    def get_obj_builders(self, variant, module):

        env = variant.env

        objects = []

        if len(module.config) > 0:

            src_config_file = os.path.join(self.build_dir, 'config', module.name + '-config.h')

            tgt_config_file = os.path.join(variant.build_root, 'include', 

                                           'ns3', module.name + '-config.h')

        for source in module.sources:

            obj_file = os.path.splitext(source)[0] + '.o'

            tgt = os.path.join(variant.build_root, module.dir, obj_file)

            src = os.path.join(module.dir, source)

            if variant.static:

                obj_builder = env.StaticObject(target = tgt, source = src)

            else:

                obj_builder = env.SharedObject(target = tgt, source = src)

            if len(module.config) > 0:

                config_file = env.MyCopyBuilder(target = [tgt_config_file], 

                                                 source = [src_config_file])

                env.Depends(obj_builder, config_file)

            if variant.gcxx_deps:

                gcno_tgt = os.path.join(variant.build_root, module.dir, 

                                        os.path.splitext(source)[0] + '.gcno')

                gcda_tgt = os.path.join(variant.build_root, module.dir, 

                                        os.path.splitext(source)[0] + '.gcda')

                gcda_src = os.path.join(variant.gcxx_root, module.dir, 

                                        os.path.splitext(source)[0] + '.gcda')

                gcno_src = os.path.join(variant.gcxx_root, module.dir, 

                                        os.path.splitext(source)[0] + '.gcno')

                gcno_builder = env.CopyGcxxBuilder(target = gcno_tgt, source = gcno_src)

                gcda_builder = env.CopyGcxxBuilder(target = gcda_tgt, source = gcda_src)

                env.Depends(obj_builder, gcda_builder)

                env.Depends(obj_builder, gcno_builder)

            objects.append(obj_builder)

        return objects

    def get_internal_deps(self, module, hash):

        for dep_name in module.deps:

            dep = self.__get_module(dep_name)

            hash[dep_name] = dep

            self.get_internal_deps(dep, hash)

    def get_external_deps(self, module):

        hash = {}

        self.get_internal_deps(module, hash)

        ext_hash = {}

        for mod in hash.values():

            for ext_dep in mod.external_deps:

                ext_hash[ext_dep] = 1

        return ext_hash.keys()

    def get_sorted_deps(self, module):

        h = {}

        self.get_internal_deps(module, h)

        modules = []

        for dep in h.keys():

            deps_copy = []

            mod = h[dep]

            deps_copy.extend(mod.deps)

            modules.append([mod, deps_copy])

        sorted = []

        while len(modules) > 0:

            to_remove = []

            for item in modules:

                if len(item[1]) == 0:

                    to_remove.append(item[0].name)

            for item in to_remove:

                for i in modules:

                    if item in i[1]:

                        i[1].remove(item)

            new_modules = []

            for mod in modules:

                found = False

                for i in to_remove:

                    if i == mod[0].name:

                        found = True

                        break

                if not found:

                    new_modules.append(mod)

            modules = new_modules

            sorted.extend(to_remove)

        sorted.reverse()

        # append external deps

        ext_deps = self.get_external_deps(module)

        for dep in ext_deps:

            sorted.append(dep)

        return sorted

    def gen_mod_dep(self, variant):

        build_root = variant.build_root

        cpp_path = os.path.join(variant.build_root, 'include')

        env = variant.env

        env.Append(CPPPATH = [cpp_path])

        header_dir = os.path.join(build_root, 'include', 'ns3')

        lib_path = os.path.join(build_root, 'lib')

        module_builders = []

        for module in self.__modules:

            objects = self.get_obj_builders(variant, module)

            libs = self.get_sorted_deps(module)

            filename = self.get_mod_output(module, variant)

            if module.executable:

                module_builder = env.Program(target=filename, source=objects, 

                                             LIBPATH=lib_path, LIBS=libs)

            else:

                if variant.static:

                    module_builder = env.StaticLibrary(target=filename, source=objects)

                else:

                    module_builder = env.SharedLibrary(target=filename, source=objects, 

                                                       LIBPATH=lib_path, LIBS=libs)

            for dep_name in module.deps:

                dep = self.__get_module(dep_name)

                env.Depends(module_builder, self.get_mod_output(dep, variant))

            for header in module.inst_headers:

                tgt = os.path.join(header_dir, header)

                src = os.path.join(module.dir, header)

                #builder = env.Install(target = tgt, source = src)

                header_builder = env.MyCopyBuilder(target=tgt, source=src)

                env.Depends(module_builder, header_builder)

            module_builders.append(module_builder)

        return module_builders

    def gen_mod_config(self, env):

        config_dir = os.path.join(self.build_dir, 'config')

        for module in self.__modules:

            if len(module.config) > 0:

                config_file = os.path.join(config_dir, module.name + '-config.h')

                config_file_guard = module.name + '_CONFIG_H'

                config_file_guard.upper()

                if not os.path.isfile(config_file):

                    if not os.path.isdir(config_dir):

                        os.makedirs(config_dir)

                    outfile = open(config_file, 'w')

                    outfile.write('#ifndef ' + config_file_guard + '\n')

                    outfile.write('#define ' + config_file_guard + '\n')

                    config = env.Configure()

                    for fn in module.config:

                        output = fn(env, config)

                        for o in output:

                            outfile.write(o)

                            outfile.write('\n')

                    outfile.write('#endif /*' + config_file_guard + '*/\n')

                    config.Finish()

    def generate_dependencies(self):

        inheritenv = (ARGUMENTS.get('inheritenv', 'n') in 'yY1')

        if inheritenv:

            env = Environment(ENV=os.environ)

        else:

            env = Environment()

        self.gen_mod_config(env)

        cc = env['CC']

        cxx = env.subst(env['CXX'])

        common_flags = ARGUMENTS.get('cflags', '').split(' ')

        cxxflags = ARGUMENTS.get('cxxflags', '').split(' ')

        ldflags = ARGUMENTS.get('ldflags', '').split(' ')

        if cc == 'cl' and cxx == 'cl':

            env = Environment(tools=['mingw'])

            cc = env['CC']

            cxx = env.subst(env['CXX'])

        if cc == 'gcc' and cxx == 'g++':

            common_flags.extend(['-g3', '-Wall', '-Werror'])

            debug_flags = []

            opti_flags = ['-O3']

        elif cc == 'cl' and cxx == 'cl':

            env = Environment(ENV=os.environ)

            debug_flags = ['-W1', '-GX', '-EHsc', '-D_DEBUG', '/MDd']

            opti_flags = ['-O2', '-EHsc', '-DNDEBUG', '/MD']

        env.Append(CCFLAGS = common_flags, 

                    CPPDEFINES = ['RUN_SELF_TESTS'], 

                    TARFLAGS = '-c -z', 

                    CPPFLAGS = cxxflags, 

                    LINKFLAGS = ldflags)

        if env['PLATFORM'] == 'posix':

            env.Append(LINKFLAGS = ' -z origin')

            env.Append(RPATH=env.Literal(os.path.join('\\$$ORIGIN', os.pardir, 'lib')))

        verbose = ARGUMENTS.get('verbose', 'n')

        if verbose == 'n':

            env['PRINT_CMD_LINE_FUNC'] = print_cmd_line

        header_builder = Builder(action = Action(MyCopyAction, strfunction=MyCopyActionPrint))

        env.Append(BUILDERS = {'MyCopyBuilder':header_builder})

        gcxx_builder = Builder(action = Action(MyCopyAction, strfunction=MyCopyActionPrint), 

                                emitter = GcxxEmitter)

        env.Append(BUILDERS = {'CopyGcxxBuilder':gcxx_builder})

        variant = Ns3BuildVariant()

        builders = []

        gcov_env = env.Copy()

        gcov_env.Append(CFLAGS = ['-fprofile-arcs', '-ftest-coverage'], 

                         CXXFLAGS = ['-fprofile-arcs', '-ftest-coverage'], 

                         LINKFLAGS = ['-fprofile-arcs'])

        # code coverage analysis

        variant.static = False

        variant.env = gcov_env

        variant.build_root = os.path.join(self.build_dir, 'gcov')

        builders = self.gen_mod_dep(variant)

        for builder in builders:

            gcov_env.Alias('gcov', builder)

        gcov_env.Alias('lcov-report')

        if 'lcov-report' in COMMAND_LINE_TARGETS:

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

            create_dir_command = "rm -rf " + lcov_report_dir

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

            gcov_env.Execute(create_dir_command)

            info_file = os.path.join(lcov_report_dir, 'ns3.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.build_root, 

                                                'include')

            gcov_env.Execute(lcov_command)

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

            genhtml_command += " " + info_file

            gcov_env.Execute(genhtml_command)

        opt_env = env.Copy()

        opt_env.Append(CFLAGS=opti_flags, 

                        CXXFLAGS=opti_flags, 

                        CPPDEFINES=['NDEBUG'])

        # optimized static support

        variant.static = True

        variant.env = opt_env

        variant.build_root = os.path.join(self.build_dir, 'opt-static')

        builders = self.gen_mod_dep(variant)

        for builder in builders:

            opt_env.Alias('opt-static', builder)

        opt_env = env.Copy()

        opt_env.Append(CFLAGS = opti_flags, 

                        CXXFLAGS = opti_flags, 

                        CPPDEFINES = ['NDEBUG'])

        # optimized shared support

        variant.static = False

        variant.env = opt_env

        variant.build_root = os.path.join(self.build_dir, 'opt-shared')

        builders = self.gen_mod_dep(variant)

        for builder in builders:

            opt_env.Alias('opt-shared', builder)

        arc_env = env.Copy()

        arc_env.Append(CFLAGS=opti_flags, 

                        CXXFLAGS=opti_flags, 

                        CPPDEFINES=['NDEBUG'])

        arc_env.Append(CFLAGS=['-frandom-seed=0', '-fprofile-generate'], 

                        CXXFLAGS=['-frandom-seed=0', '-fprofile-generate'], 

                        LINKFLAGS=['-frandom-seed=0', '-fprofile-generate'])

        # arc profiling

        variant.static = False

        variant.env = arc_env

        variant.build_root = os.path.join(self.build_dir, 'opt-arc')

        builders = self.gen_mod_dep(variant)

        for builder in builders:

            arc_env.Alias('opt-arc', builder)

        arcrebuild_env = env.Copy()

        arcrebuild_env.Append(CFLAGS=opti_flags, 

                               CXXFLAGS=opti_flags, 

                               CPPDEFINES=['NDEBUG'])

        arcrebuild_env.Append(CFLAGS=['-frandom-seed=0', '-fprofile-use'], 

                               CXXFLAGS=['-frandom-seed=0', '-fprofile-use'], 

                               LINKFLAGS=['-frandom-seed=0', '-fprofile-use'])

        # arc rebuild

        variant.static = False

        variant.env = arcrebuild_env

        variant.gcxx_deps = True

        variant.gcxx_root = os.path.join(self.build_dir, 'opt-arc')

        variant.build_root = os.path.join(self.build_dir, 'opt-arc-rebuild')

        builders = self.gen_mod_dep(variant)

        for builder in builders:

            arcrebuild_env.Alias('opt-arc-rebuild', builder)

        variant.gcxx_deps = False

        dbg_env = env.Copy()

        env.Append(CFLAGS = debug_flags, 

                    CXXFLAGS = debug_flags, )

        # debug static support

        variant.static = True

        variant.env = dbg_env

        variant.build_root = os.path.join(self.build_dir, 'dbg-static')

        builders = self.gen_mod_dep(variant)

        for builder in builders:

            dbg_env.Alias('dbg-static', builder)

        dbg_env = env.Copy()

        env.Append(CFLAGS=debug_flags, 

                    CXXFLAGS=debug_flags, )

        # debug shared support

        variant.static = False

        variant.env = dbg_env

        variant.build_root = os.path.join(self.build_dir, 'dbg-shared')

        builders = self.gen_mod_dep(variant)

        for builder in builders:

            dbg_env.Alias('dbg-shared', builder)

        env.Alias('dbg', 'dbg-shared')

        env.Alias('opt', 'opt-shared')

        env.Default('dbg')

        env.Alias('all', ['dbg-shared', 'dbg-static', 'opt-shared', 'opt-static'])

        # dist support

        dist_env = env.Copy()

        if dist_env['PLATFORM'] == 'posix':

            dist_list = []

            for module in self.__modules:

                for f in module.sources:

                    dist_list.append(os.path.join(module.dir, f))

                for f in module.headers:

                    dist_list.append(os.path.join(module.dir, f))

                for f in module.inst_headers:

                    dist_list.append(os.path.join(module.dir, f))

                for f in module.extra_dist:

                    dist_list.append(os.path.join(module.dir, f))

            for f in self.extra_dist:

                dist_list.append(f)

            dist_list.append('SConstruct')

            dist_list.append('build.py')

            targets = []