# -*- Python -*-

# Experimental interface between distutils and autoconf for rpki CA tools.
# 
# This is not yet ready for prime time.

# $Id$
#
# Copyright (C) 2012  Internet Systems Consortium ("ISC")
# 
# Permission to use, copy, modify, and distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
# REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
# AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
# INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
# LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
# OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
# PERFORMANCE OF THIS SOFTWARE.

import re
import os

class Autoconf(object):

  def __init__(self):
    self._names = set()
    self._lists = set()

  def _configure_strings(self, **kwargs):
    for k, v in kwargs.iteritems():
      setattr(self, k, v.strip())
    self._names.update(kwargs)

  def _configure_lists(self, **kwargs):
    self._configure_strings(**kwargs)
    self._lists.update(kwargs)

  @property
  def build_openssl(self):
    return "openssl" in self.TOP_LEVEL_SUBDIRS

  _re = re.compile(r"\$\{[^}]+\}")

  def _repl(self, m):
    orig = m.group(0)
    name = orig[2:-1]
    return getattr(self, name, os.getenv(name, orig))

  def _fixup(self):

    done = False
    while not done:
      done = True
      for name in self._names:
        v, n = self._re.subn(self._repl, getattr(self, name))
        if v != getattr(self, name):
          setattr(self, name, v)
          done = False

    for name in self._lists:
      setattr(self, name, getattr(self, name).split())

ac = Autoconf()

ac._configure_lists(
  TOP_LEVEL_SUBDIRS     = '''@TOP_LEVEL_SUBDIRS@''',
  CFLAGS                = '''@CFLAGS@''',
  LDFLAGS               = '''@LDFLAGS@ @POW_LDFLAGS@''',
  LIBS                  = '''@LIBS@''')

ac._configure_strings(
  prefix                = '''@prefix@''',
  sbindir               = '''@sbindir@''',
  sysconfdir            = '''@sysconfdir@''',
  abs_top_builddir      = '''@abs_top_builddir@''',
  abs_top_srcdir        = '''@abs_top_srcdir@''',
  abs_builddir          = '''@abs_builddir@''',
  exec_prefix           = '''@exec_prefix@''',
  libexecdir            = '''@libexecdir@''',
  PYTHON                = '''@PYTHON@''')

ac._fixup()

if __name__ == "__main__":
  for name in ac._names:
    print "%s: %r" % (name, getattr(ac, name))
  print
  print "build_openssl:", ac.build_openssl