#!/usr/bin/env python
from waflib.extras import autowaf as autowaf
import re

# Variables for 'waf dist'
APPNAME = 'eg-metro.lv2'
VERSION = '1.0.0'

# Mandatory variables
top = '.'
out = 'build'

def options(opt):
    opt.load('compiler_c')
    opt.load('lv2')
    autowaf.set_options(opt)

def configure(conf):
    autowaf.display_header('Metro Configuration')
    conf.load('compiler_c', cache=True)
    conf.load('lv2', cache=True)
    conf.load('autowaf', cache=True)

    if not autowaf.is_child():
        autowaf.check_pkg(conf, 'lv2', atleast_version='0.2.0', uselib_store='LV2')

    conf.check(features='c cshlib', lib='m', uselib_store='M', mandatory=False)

    autowaf.display_msg(conf, 'LV2 bundle directory', conf.env.LV2DIR)
    print('')

def build(bld):
    bundle = 'eg-metro.lv2'

    # Make a pattern for shared objects without the 'lib' prefix
    module_pat = re.sub('^lib', '', bld.env.cshlib_PATTERN)
    module_ext = module_pat[module_pat.rfind('.'):]

    # Build manifest.ttl by substitution (for portable lib extension)
    bld(features     = 'subst',
        source       = 'manifest.ttl.in',
        target       = '%s/%s' % (bundle, 'manifest.ttl'),
        install_path = '${LV2DIR}/%s' % bundle,
        LIB_EXT      = module_ext)

    # Copy other data files to build bundle (build/eg-metro.lv2)
    bld(features     = 'subst',
        is_copy      = True,
        source       = 'metro.ttl',
        target       = '%s/metro.ttl' % bundle,
        install_path = '${LV2DIR}/%s' % bundle)

    # Use LV2 headers from parent directory if building as a sub-project
    includes = ['.']
    if autowaf.is_child:
        includes += ['../..']

    # Build plugin library
    obj = bld(features     = 'c cshlib',
              source       = 'metro.c',
              name         = 'metro',
              target       = '%s/metro' % bundle,
              install_path = '${LV2DIR}/%s' % bundle,
              use          = ['M', 'LV2'],
              includes     = includes)
    obj.env.cshlib_PATTERN = module_pat
