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

VERSION = '0.6'
APPNAME = 'ndn-tools'
GIT_TAG_PREFIX = 'ndn-tools-'

from waflib import Utils, Context
import os, subprocess

def options(opt):
    opt.load(['compiler_cxx', 'gnu_dirs'])
    opt.load(['default-compiler-flags', 'coverage', 'sanitizers', 'boost',
              'sphinx_build'],
             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 filesystem program_options regex thread log log_setup'
    if conf.options.with_tests:
        conf.env['WITH_TESTS'] = True
        conf.define('WITH_TESTS', 1)
        boost_libs += ' unit_test_framework'
    conf.check_boost(lib=boost_libs, mt=True)

    conf.recurse('tools')

    conf.check_compiler_flags()

    # Loading "late" to prevent tests from being compiled with profiling flags
    conf.load('coverage')
    conf.load('sanitizers')

    conf.msg('Tools to build', ', '.join(conf.env['BUILD_TOOLS']))

def build(bld):
    version(bld)

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

    bld.objects(target='core-objects',
                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(ctx):
    # don't execute more than once
    if getattr(Context.g_module, 'VERSION_BASE', None):
        return

    Context.g_module.VERSION_BASE = Context.g_module.VERSION
    Context.g_module.VERSION_SPLIT = VERSION_BASE.split('.')

    # first, try to get a version string from git
    gotVersionFromGit = False
    try:
        cmd = ['git', 'describe', '--always', '--match', '%s*' % GIT_TAG_PREFIX]
        out = subprocess.check_output(cmd, universal_newlines=True).strip()
        if out:
            gotVersionFromGit = True
            if out.startswith(GIT_TAG_PREFIX):
                Context.g_module.VERSION = out.lstrip(GIT_TAG_PREFIX)
            else:
                # no tags matched
                Context.g_module.VERSION = '%s-commit-%s' % (VERSION_BASE, out)
    except subprocess.CalledProcessError:
        pass

    versionFile = ctx.path.find_node('VERSION')
    if not gotVersionFromGit and versionFile is not None:
        try:
            Context.g_module.VERSION = versionFile.read()
            return
        except EnvironmentError:
            pass

    # version was obtained from git, update VERSION file if necessary
    if versionFile is not None:
        try:
            if versionFile.read() == Context.g_module.VERSION:
                # already up-to-date
                return
        except EnvironmentError as e:
            Logs.warn('%s exists but is not readable (%s)' % (versionFile, e.strerror))
    else:
        versionFile = ctx.path.make_node('VERSION')

    try:
        versionFile.write(Context.g_module.VERSION)
    except EnvironmentError as e:
        Logs.warn('%s is not writable (%s)' % (versionFile, e.strerror))

def dist(ctx):
    version(ctx)

def distcheck(ctx):
    version(ctx)