Make fancyopts handle no arguments

This lets hg serve work with no args.

mercurial/fancyopts.py

@@ -1,51 +1,51 b''
 import sys, os, getopt
 
-def fancyopts(args, options, state, syntax=''):
+def fancyopts(args, options, state, syntax='', minlen = 0):
     long=[]
     short=''
     map={}
     dt={}
 
     def help(state, opt, arg, options=options, syntax=syntax):
         print "Usage: ", syntax
 
         for s, l, d, c in options:
             opt=' '
             if s: opt = opt + '-' + s + ' '
             if l: opt = opt + '--' + l + ' '
             if d: opt = opt + '(' + str(d) + ')'
             print opt
             if c: print '   %s' % c
         sys.exit(0)
 
-    if len(args) == 0:
+    if len(args) < minlen:
         help(state, None, args)
 
     options=[('h', 'help', help, 'Show usage info')] + options
     
     for s, l, d, c in options:
         map['-'+s] = map['--'+l]=l
         state[l] = d
         dt[l] = type(d)
         if not d is None and not type(d) is type(help): s, l=s+':', l+'='      
         if s: short = short + s
         if l: long.append(l)
 
     if os.environ.has_key("HG_OPTS"):
         args = os.environ["HG_OPTS"].split() + args
 
     try:
         opts, args = getopt.getopt(args, short, long)
     except getopt.GetoptError:
         help(state, None, args)
         sys.exit(-1)
 
     for opt, arg in opts:
         if dt[map[opt]] is type(help): state[map[opt]](state,map[opt],arg)
         elif dt[map[opt]] is type(1): state[map[opt]] = int(arg)
         elif dt[map[opt]] is type(''): state[map[opt]] = arg
         elif dt[map[opt]] is type([]): state[map[opt]].append(arg)
         elif dt[map[opt]] is type(None): state[map[opt]] = 1
         
     return args