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Adding shlex and netrc by Eric Raymond.

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This commit is contained in:
Guido van Rossum 1998-12-22 05:19:29 +00:00
parent 5e97c9dff9
commit 9c30c24bc2
2 changed files with 212 additions and 0 deletions
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93
Lib/netrc.py Normal file
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#!/usr/bin/python
# Module and documentation by Eric S. Raymond, 21 Dec 1998
import sys, os, string, shlex
class netrc:
def __init__(self, file=None):
if not file:
file = os.path.join(os.environ['HOME'], ".netrc")
try:
fp = open(file)
except:
return None
self.hosts = {}
self.macros = {}
lexer = shlex.shlex(fp)
lexer.wordchars = lexer.wordchars + '.'
while 1:
# Look for a machine, default, or macdef top-level keyword
toplevel = tt = lexer.get_token()
if tt == '' or tt == None:
break
elif tt == 'machine':
entryname = lexer.get_token()
elif tt == 'default':
entryname = 'default'
elif tt == 'macdef': # Just skip to end of macdefs
entryname = lexer.get_token()
self.macros[entryname] = []
lexer.whitepace = ' \t'
while 1:
line = lexer.instream.readline()
if not line or line == '\012' and tt == '\012':
lexer.whitepace = ' \t\r\n'
break
tt = line
self.macros[entryname].append(line)
else:
raise SyntaxError, "bad toplevel token %s, file %s, line %d" \
% (tt, file, lexer.lineno)
# We're looking at start of an entry for a named machine or default.
if toplevel == 'machine':
login = account = password = None
self.hosts[entryname] = {}
while 1:
tt = lexer.get_token()
if tt=='' or tt == 'machine' or tt == 'default' or tt == 'macdef':
if toplevel == 'macdef':
break;
elif login and password:
self.hosts[entryname] = (login, account, password)
lexer.push_token(tt)
break
else:
raise SyntaxError, "malformed %s entry %s terminated by %s" % (toplevel, entryname, repr(tt))
elif tt == 'login' or tt == 'user':
login = lexer.get_token()
elif tt == 'account':
account = lexer.get_token()
elif tt == 'password':
password = lexer.get_token()
else:
raise SyntaxError, "bad follower token %s, file %s, line %d"%(tt,file,lexer.lineno)
def authenticators(self, host):
"Return a (user, account, password) tuple for given host."
if self.hosts.has_key(host):
return self.hosts[host]
elif self.hosts.has_key('default'):
return self.hosts['default']
else:
return None
def __repr__(self):
"Dump the class data in the format of a .netrc file"
rep = ""
for host in self.hosts.keys():
attrs = self.hosts[host]
rep = rep + "machine "+ host + "\n\tlogin " + repr(attrs[0]) + "\n"
if attrs[1]:
rep = rep + "account " + repr(attrs[1])
rep = rep + "\tpassword " + repr(attrs[2]) + "\n"
for macro in self.macros.keys():
rep = rep + "macdef " + macro + "\n"
for line in self.macros[macro]:
rep = rep + line
rep = rep + "\n"
return rep
if __name__ == '__main__':
print netrc()

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Lib/shlex.py Normal file
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#!/usr/bin/python
# Module and documentation by Eric S. Raymond, 21 Dec 1998
import sys, os, string
class shlex:
"A lexical analyzer class for simple shell-like syntaxes."
def __init__(self, instream=None):
if instream:
self.instream = instream
else:
self.instream = sys.stdin
self.commenters = '#'
self.wordchars = 'abcdfeghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_'
self.whitespace = ' \t\r\n'
self.quotes = '\'"'
self.state = ' '
self.pushback = [];
self.lineno = 1
self.debug = 0
self.token = ''
def push_token(self, tok):
"Push a token onto the stack popped by the get_token method"
if (self.debug >= 1):
print "Pushing " + tok
self.pushback = [tok] + self.pushback;
def get_token(self):
"Get a token from the input stream (or from stack if it's monempty)"
if self.pushback:
tok = self.pushback[0]
self.pushback = self.pushback[1:]
if (self.debug >= 1):
print "Popping " + tok
return tok
tok = ''
while 1:
nextchar = self.instream.read(1);
if nextchar == '\n':
self.lineno = self.lineno + 1
if self.debug >= 3:
print "In state " + repr(self.state) + " I see character: " + repr(nextchar)
if self.state == None:
return ''
elif self.state == ' ':
if not nextchar:
self.state = None; # end of file
break
elif nextchar in self.whitespace:
if self.debug >= 2:
print "I see whitespace in whitespace state"
if self.token:
break # emit current token
else:
continue
elif nextchar in self.commenters:
self.instream.readline()
self.lineno = self.lineno + 1
elif nextchar in self.wordchars:
self.token = nextchar
self.state = 'a'
elif nextchar in self.quotes:
self.token = nextchar
self.state = nextchar
else:
self.token = nextchar
if self.token:
break # emit current token
else:
continue
elif self.state in self.quotes:
self.token = self.token + nextchar
if nextchar == self.state:
self.state = ' '
break
elif self.state == 'a':
if not nextchar:
self.state = None; # end of file
break
elif nextchar in self.whitespace:
if self.debug >= 2:
print "I see whitespace in word state"
self.state = ' '
if self.token:
break # emit current token
else:
continue
elif nextchar in self.commenters:
self.instream.readline()
self.lineno = self.lineno + 1
elif nextchar in self.wordchars or nextchar in self.quotes:
self.token = self.token + nextchar
else:
self.pushback = [nextchar] + self.pushback
if self.debug >= 2:
print "I see punctuation in word state"
state = ' '
if self.token:
break # emit current token
else:
continue
result = self.token
self.token = ''
if self.debug >= 1:
print "Token: " + result
return result
if __name__ == '__main__':
lexer = shlex()
while 1:
tt = lexer.get_token()
if tt != None:
print "Token: " + repr(tt)
else:
break