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### jack_argv - argv parser and help printing -- part of
### jack - extract audio from a CD and MP3ify it using 3rd party software
### Copyright (C) 2002-2004 Arne Zellentin <zarne@users.sf.net>
### This program is free software; you can redistribute it and/or modify
### it under the terms of the GNU General Public License as published by
### the Free Software Foundation; either version 2 of the License, or
### (at your option) any later version.
### This program is distributed in the hope that it will be useful,
### but WITHOUT ANY WARRANTY; without even the implied warranty of
### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
### GNU General Public License for more details.
### You should have received a copy of the GNU General Public License
### along with this program; if not, write to the Free Software
### Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
import sys
import types
import jack_utils
import jack_generic
from jack_globals import *
from jack_misc import safe_int
def show_usage(cf, long=0):
l = []
for i in cf.keys():
if not long and not cf[i].has_key('help'):
continue
s = ""
if cf[i].has_key('usage'):
if cf[i].has_key('long'):
s = " --%s" % cf[i]['long']
if cf[i].has_key('short'):
s = s + ", -%s" % cf[i]['short']
else:
error("internal error in show_usage")
x_char = " "
l.append([s, cf[i]['usage'] + jack_utils.yes(cf[i])])
max_len = 0
for i in l:
max_len = max(max_len, len(i[0]))
l.sort()
print "usage: jack [option]..."
for i in l:
jack_generic.indent(i[0] + " " * (max_len - len(i[0])), i[1])
if long:
print """
While Jack is running, press q or Q to quit,
p or P to disable ripping (you need the CD drive)
p or P (again) or c or C to resume,
e or E to pause/continue all encoders and
r or R to pause/continue all rippers.
"""
else:
print "These are the most commom options. For a complete list, run jack --longhelp"
def get_next(argv, i, extra_arg = None):
if extra_arg != None:
return i, extra_arg
elif argv[i].find("=") > 0:
return i, argv[i].split("=", 1)[1]
else:
i = i + 1
if len(argv) > i:
return i, argv[i]
else:
return i, None
def istrue(x):
return x.upper() in ["Y", "YES", "1", "TRUE"]
def parse_option(cf, argv, i, option, alt_arg, origin="argv"):
ty = cf[option]['type']
if ty == 'toggle':
if alt_arg:
return i, istrue(alt_arg)
else:
return i, not cf[option]['val']
if ty == types.FloatType:
i, data = get_next(argv, i, alt_arg)
if data != None:
try:
data = float(data)
return i, data
except:
return None, "option `%s' needs a float argument" % option
else:
return None, "Option `%s' needs exactly one argument" % option
if ty == types.IntType:
i, data = get_next(argv, i, alt_arg)
if data != None:
try:
data = int(data)
return i, data
except:
return None, "option `%s' needs an integer argument" % option
return i, safe_int(data, "option `%s' needs an integer argument" % option)
else:
return None, "Option `%s' needs exactly one argument" % option
if ty == types.StringType:
i, data = get_next(argv, i, alt_arg)
if data != None:
return i, data
else:
return None, "Option `%s' needs exactly one string argument" % option
if ty == types.ListType:
l = []
if origin == "argv":
while 1:
i, data = get_next(argv, i, alt_arg)
if data != None:
if data == ";":
break
l.append(data)
if alt_arg: # only one option in --opt=val form
break
else:
break
elif origin == "rcfile":
i, data = get_next(argv, i, alt_arg)
l = eval(data)
if l and type(l) == types.ListType:
return i, l
else:
return None, "option `%s' takes a non-empty list (which may be terminated by \";\")" % `option`
# default
return None, "unknown argument type for option `%s'." % option
def parse_argv(cf, argv):
argv_cf = {}
allargs = {}
for i in cf.keys():
if cf[i].has_key('long'):
if len(cf[i]['long']) < 2 or allargs.has_key(cf[i]['long']):
print "Hey Arne, don't bullshit me!"
print cf[i]
sys.exit(1)
else:
allargs[cf[i]['long']] = i
if cf[i].has_key('short'):
if len(cf[i]['short']) != 1 or allargs.has_key(cf[i]['short']):
print "Hey Arne, don't bullshit me!"
print cf[i]
sys.exit(1)
else:
allargs[cf[i]['short']] = i
i = 1
while i < len(argv):
if argv[i] in ("-h", "--help"):
show_usage(cf)
sys.exit(0)
if argv[i] in ("--longhelp", "--long-help"):
show_usage(cf, long=1)
sys.exit(0)
option = ""
tmp_option = tmp_arg = None
if argv[i].find("=") >= 2:
tmp_option, tmp_arg = argv[i].split("=", 1)
else:
tmp_option = argv[i]
if len(tmp_option) == 2 and tmp_option[0] == "-":
o = tmp_option[1]
if allargs.has_key(o):
option = allargs[o]
elif tmp_option == "--override":
i, option = get_next(argv, i, tmp_arg)
if option.find("=") > 0:
option, tmp_arg = option.split("=", 1)
if option == None:
print "--override takes two arguments: <VARIABLE> <VALUE>"
sys.exit(1)
elif len(tmp_option) > 2 and tmp_option[0:2] == "--":
o = tmp_option[2:]
if allargs.has_key(o):
option = allargs[o]
if option:
i, value = parse_option(cf, argv, i, option, tmp_arg)
if i == None:
error(value)
if not argv_cf.has_key(option):
argv_cf[option] = {}
argv_cf[option].update({'val': value})
else:
print "unknown option `%s'" % argv[i]
show_usage(cf)
sys.exit(1)
if not i:
break
i = i + 1
return argv_cf
# end of parse_argv()
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