Hacked to support the notion of "negative alias" options, to handle

-q/--quiet reasonably elegantly.
This commit is contained in:
Greg Ward 1999-10-03 20:48:53 +00:00
parent c74138d941
commit a564cc315b
1 changed files with 32 additions and 3 deletions

View File

@ -21,7 +21,12 @@ from distutils.errors import *
# the same as a Python NAME -- except, in the spirit of most GNU
# utilities, we use '-' in place of '_'. (The spirit of LISP lives on!)
# The similarities to NAME are again not a coincidence...
longopt_re = re.compile (r'^[a-zA-Z]([a-zA-Z0-9-]*)$')
longopt_pat = r'[a-zA-Z](?:[a-zA-Z0-9-]*)'
longopt_re = re.compile (r'^%s$' % longopt_pat)
# For recognizing "negative alias" options, eg. "quiet=!verbose"
neg_alias_re = re.compile ("^(%s)=!(%s)$" % (longopt_pat, longopt_pat))
# This is used to translate long options to legitimate Python identifiers
# (for use as attributes of some object).
@ -46,6 +51,7 @@ def fancy_getopt (options, object, args):
short2long = {}
attr_name = {}
takes_arg = {}
neg_alias = {}
for option in options:
try:
@ -73,7 +79,26 @@ def fancy_getopt (options, object, args):
long = long[0:-1]
takes_arg[long] = 1
else:
takes_arg[long] = 0
# Is option is a "negative alias" for some other option (eg.
# "quiet=!verbose")?
match = neg_alias_re.match (long)
if match:
(alias_from, alias_to) = match.group (1,2)
if not takes_arg.has_key(alias_to) or takes_arg[alias_to]:
raise DistutilsGetoptError, \
("option '%s' is a negative alias for '%s', " +
"which either hasn't been defined yet " +
"or takes an argument") % (alias_from, alias_to)
long = alias_from
neg_alias[long] = alias_to
long_opts[-1] = long
takes_arg[long] = 0
else:
takes_arg[long] = 0
# Now enforce some bondage on the long option name, so we can later
# translate it to an attribute name in 'object'. Have to do this a
@ -112,7 +137,11 @@ def fancy_getopt (options, object, args):
setattr (object, attr, val)
else:
if val == '':
setattr (object, attr, 1)
alias = neg_alias.get (opt)
if alias:
setattr (object, attr_name[alias], 0)
else:
setattr (object, attr, 1)
else:
raise RuntimeError, "getopt lies! (bad value '%s')" % value