#!/usr/bin/env python3

from __future__ import print_function
import sys
import os
import getopt
from distutils import sysconfig

valid_opts = ['prefix', 'exec-prefix', 'includes', 'libs', 'cflags', 
              'ldflags', 'help']

def exit_with_usage(code=1):
    print("Usage: %s [%s]" % (sys.argv[0], '|'.join('--'+opt for opt in valid_opts)), file=sys.stderr)
    sys.exit(code)

try:
    opts, args = getopt.getopt(sys.argv[1:], '', valid_opts)
except getopt.error:
    exit_with_usage()

if not opts:
    exit_with_usage()

opt = opts[0][0]

pyver = sysconfig.get_config_var('LDVERSION')
if pyver == None:
    pyver = sysconfig.get_config_var('VERSION')
getvar = sysconfig.get_config_var

if opt == '--help':
    exit_with_usage(0)

elif opt == '--prefix':
    print(sysconfig.PREFIX)

elif opt == '--exec-prefix':
    print(sysconfig.EXEC_PREFIX)

elif opt in ('--includes', '--cflags'):
    flags = ['-I' + sysconfig.get_python_inc(),
             '-I' + sysconfig.get_python_inc(plat_specific=True)]
    if opt == '--cflags':
        flags.extend(getvar('CFLAGS').split())
    print(' '.join(flags))

elif opt in ('--libs', '--ldflags'):
    libs = getvar('LIBS').split() + getvar('SYSLIBS').split()
    libs.append('-lpython'+pyver)
    # add the prefix/lib/pythonX.Y/config dir, but only if there is no
    # shared library in prefix/lib/.
    if opt == '--ldflags' and not getvar('Py_ENABLE_SHARED'):
        libs.insert(0, '-L' + getvar('LIBPL'))
    print(' '.join(libs))

