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

VERSION = '0.3'
APPNAME = 'ndn-tools'
GIT_TAG_PREFIX = 'ndn-tools-'

from waflib import Utils, Context
import os

def options(opt):
    opt.load(['compiler_cxx', 'gnu_dirs'])
    opt.load(['default-compiler-flags', 'sanitizers', 'sphinx_build', 'boost'],
             tooldir=['.waf-tools'])

    opt.add_option('--with-tests', action='store_true', default=False,
                   dest='with_tests', help='''Build unit tests''')

    opt.recurse('tools')

def configure(conf):
    conf.load(['compiler_cxx', 'gnu_dirs',
               'default-compiler-flags', 'sphinx_build', 'boost'])

    if 'PKG_CONFIG_PATH' not in os.environ:
        os.environ['PKG_CONFIG_PATH'] = Utils.subst_vars('${LIBDIR}/pkgconfig', conf.env)
    conf.check_cfg(package='libndn-cxx', args=['--cflags', '--libs'],
                   uselib_store='NDN_CXX', mandatory=True)

    boost_libs = 'system iostreams regex'
    if conf.options.with_tests:
        conf.env['WITH_TESTS'] = 1
        conf.define('WITH_TESTS', 1);
        boost_libs += ' unit_test_framework'
    conf.check_boost(lib=boost_libs)

    conf.recurse('tools')

    conf.load('sanitizers')

def build(bld):
    version(bld)

    bld(features='subst',
        source='core/version.cpp.in',
        target='core/version.cpp',
        VERSION_BUILD=VERSION)

    bld(target='core-objects',
        name='core-objects',
        features='cxx',
        source=bld.path.ant_glob(['core/*.cpp']) + ['core/version.cpp'],
        use='NDN_CXX BOOST',
        includes='.',
        export_includes='.')

    bld.recurse('tools')
    bld.recurse('tests')
    bld.recurse('manpages')

def version(bld):
    # Modified from ndn-cxx wscript
    try:
        cmd = ['git', 'describe', '--always', '--match', '%s*' % GIT_TAG_PREFIX]
        p = Utils.subprocess.Popen(cmd, stdout=Utils.subprocess.PIPE,
                                   stderr=None, stdin=None)
        out = str(p.communicate()[0].strip())
        didGetVersion = (p.returncode == 0 and out != "")
        if didGetVersion:
            if out.startswith(GIT_TAG_PREFIX):
                Context.g_module.VERSION = out[len(GIT_TAG_PREFIX):]
            else:
                Context.g_module.VERSION = "%s-commit-%s" % (Context.g_module.VERSION, out)
    except OSError:
        pass

    versionFile = bld.path.find_node('VERSION')

    if not didGetVersion and versionFile is not None:
        try:
            Context.g_module.VERSION = versionFile.read()
            return
        except (OSError, IOError):
            pass

    # version was obtained from git, update VERSION file if necessary
    if versionFile is not None:
        try:
            version = versionFile.read()
            if version == Context.g_module.VERSION:
                return # no need to update
        except (OSError, IOError):
            Logs.warn("VERSION file exists, but not readable")
    else:
        versionFile = bld.path.make_node('VERSION')

    # neither git describe nor VERSION file contain the version, so fall back to constant in wscript
    if versionFile is None:
        Context.g_module.VERSION = VERSION

    try:
        versionFile.write(Context.g_module.VERSION)
    except (OSError, IOError):
        Logs.warn("VERSION file is not writeable")