#! /usr/bin/python

import sre as re
import os
from sys import argv, stderr

class struct (object):
  def __init__(me, **kw):
    me.__dict__.update(kw)
  def __repr__(me):
    r = '%s(' % me.__class__.__name__
    sep = ''
    for k in me.__dict__:
      r += sep + '%s=%r' % (k, me.__dict__[k])
      sep = ', '
    r += ')'
    return r

class service (struct):
  def __str__(me):
    return '%(name)s:%(port)d/%(proto)s' % me.__dict__
  def key(me):
    return me.port, me.proto, me.name
  def parse(string):
    m = re.match(r'''^ (\S+) \s+ (\d+)/(\S+) \s*
                     ([^#\s] [^#]* [^#\s] | [^#\s])? \s*
                     (?: \# \s* (\S .* \S | \S |) )? \s* $''',
                 string, re.VERBOSE)
    if not m:
      raise 'Bad service line %r' % string
    me = service(name = m.group(1),
                 port = int(m.group(2)),
                 proto = m.group(3),
                 aliases = m.group(4) and m.group(4).split() or [],
                 comment = m.group(5))
    return me
  parse = staticmethod(parse)

class servicetab (object):
  def __init__(me):
    me.tab = {}
  def _insert(me, serv):
    tab = me.tab
    changep = False
    if serv.key() not in tab:
      tab[serv.key()] = serv
      changep = True
    else:
      s = tab[serv.key()]
      d = {}
      for a in s.aliases:
        d[a] = 1
      #warnp = True
      dd = {}
      for a in serv.aliases:
        dd[a] = 1
        if a not in d:
          #if warnp:
          #  print >>stderr, 'Merging aliases for %s' % s
          #  warnp = False
          s.aliases += [a]
          changep = True
      #for a in s.aliases:
      #  if a not in dd:
      #    if warnp:
      #      print >>stderr, 'Merging aliases for %s' % s
      #      warnp = False
    return changep
  def scan(me, file):
    changep = False
    for l in open(file):
      if re.match(r'^\s*(\#.*)?$', l):
        continue
      serv = service.parse(l)
      if me._insert(serv):
        changep = True
    if not changep:
      print >>stderr, 'File `%s\' redundant' % file
    return changep
  def write(me):
    kk = me.tab.values()
    kk.sort(lambda x, y: cmp(x.key(), y.key()))
    print '## services file [generated]'
    print
    for s in kk:
      print '%-20s %9s %s' % (s.name,
                              '%d/%s' % (s.port, s.proto),
                              ' '.join(s.aliases))

if 'running_under_emacs_p' not in globals():
  t = servicetab()
  for f in argv[1:]:
    t.scan(f)
    t.write()