Adding shlex and netrc by Eric Raymond.
This commit is contained in:
Guido van Rossum
parent
5e97c9dff9
commit
9c30c24bc2
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#!/usr/bin/python
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# Module and documentation by Eric S. Raymond, 21 Dec 1998
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import sys, os, string, shlex
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class netrc:
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def __init__(self, file=None):
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if not file:
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file = os.path.join(os.environ['HOME'], ".netrc")
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try:
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fp = open(file)
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except:
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return None
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self.hosts = {}
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self.macros = {}
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lexer = shlex.shlex(fp)
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lexer.wordchars = lexer.wordchars + '.'
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while 1:
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# Look for a machine, default, or macdef top-level keyword
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toplevel = tt = lexer.get_token()
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if tt == '' or tt == None:
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break
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elif tt == 'machine':
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entryname = lexer.get_token()
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elif tt == 'default':
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entryname = 'default'
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elif tt == 'macdef': # Just skip to end of macdefs
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entryname = lexer.get_token()
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self.macros[entryname] = []
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lexer.whitepace = ' \t'
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while 1:
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line = lexer.instream.readline()
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if not line or line == '\012' and tt == '\012':
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lexer.whitepace = ' \t\r\n'
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break
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tt = line
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self.macros[entryname].append(line)
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else:
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raise SyntaxError, "bad toplevel token %s, file %s, line %d" \
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% (tt, file, lexer.lineno)
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# We're looking at start of an entry for a named machine or default.
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if toplevel == 'machine':
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login = account = password = None
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self.hosts[entryname] = {}
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while 1:
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tt = lexer.get_token()
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if tt=='' or tt == 'machine' or tt == 'default' or tt == 'macdef':
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if toplevel == 'macdef':
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break;
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elif login and password:
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self.hosts[entryname] = (login, account, password)
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lexer.push_token(tt)
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break
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else:
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raise SyntaxError, "malformed %s entry %s terminated by %s" % (toplevel, entryname, repr(tt))
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elif tt == 'login' or tt == 'user':
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login = lexer.get_token()
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elif tt == 'account':
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account = lexer.get_token()
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elif tt == 'password':
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password = lexer.get_token()
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else:
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raise SyntaxError, "bad follower token %s, file %s, line %d"%(tt,file,lexer.lineno)
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def authenticators(self, host):
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"Return a (user, account, password) tuple for given host."
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if self.hosts.has_key(host):
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return self.hosts[host]
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elif self.hosts.has_key('default'):
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return self.hosts['default']
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else:
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return None
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def __repr__(self):
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"Dump the class data in the format of a .netrc file"
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rep = ""
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for host in self.hosts.keys():
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attrs = self.hosts[host]
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rep = rep + "machine "+ host + "\n\tlogin " + repr(attrs[0]) + "\n"
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if attrs[1]:
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rep = rep + "account " + repr(attrs[1])
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rep = rep + "\tpassword " + repr(attrs[2]) + "\n"
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for macro in self.macros.keys():
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rep = rep + "macdef " + macro + "\n"
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for line in self.macros[macro]:
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rep = rep + line
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rep = rep + "\n"
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return rep
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if __name__ == '__main__':
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print netrc()
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@ -0,0 +1,119 @@
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#!/usr/bin/python
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# Module and documentation by Eric S. Raymond, 21 Dec 1998
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import sys, os, string
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class shlex:
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"A lexical analyzer class for simple shell-like syntaxes."
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def __init__(self, instream=None):
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if instream:
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self.instream = instream
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else:
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self.instream = sys.stdin
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self.commenters = '#'
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self.wordchars = 'abcdfeghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_'
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self.whitespace = ' \t\r\n'
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self.quotes = '\'"'
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self.state = ' '
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self.pushback = [];
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self.lineno = 1
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self.debug = 0
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self.token = ''
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def push_token(self, tok):
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"Push a token onto the stack popped by the get_token method"
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if (self.debug >= 1):
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print "Pushing " + tok
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self.pushback = [tok] + self.pushback;
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def get_token(self):
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"Get a token from the input stream (or from stack if it's monempty)"
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if self.pushback:
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tok = self.pushback[0]
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self.pushback = self.pushback[1:]
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if (self.debug >= 1):
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print "Popping " + tok
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return tok
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tok = ''
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while 1:
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nextchar = self.instream.read(1);
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if nextchar == '\n':
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self.lineno = self.lineno + 1
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if self.debug >= 3:
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print "In state " + repr(self.state) + " I see character: " + repr(nextchar)
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if self.state == None:
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return ''
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elif self.state == ' ':
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if not nextchar:
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self.state = None; # end of file
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break
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elif nextchar in self.whitespace:
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if self.debug >= 2:
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print "I see whitespace in whitespace state"
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if self.token:
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break # emit current token
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else:
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continue
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elif nextchar in self.commenters:
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self.instream.readline()
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self.lineno = self.lineno + 1
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elif nextchar in self.wordchars:
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self.token = nextchar
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self.state = 'a'
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elif nextchar in self.quotes:
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self.token = nextchar
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self.state = nextchar
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else:
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self.token = nextchar
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if self.token:
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break # emit current token
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else:
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continue
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elif self.state in self.quotes:
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self.token = self.token + nextchar
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if nextchar == self.state:
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self.state = ' '
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break
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elif self.state == 'a':
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if not nextchar:
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self.state = None; # end of file
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break
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elif nextchar in self.whitespace:
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if self.debug >= 2:
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print "I see whitespace in word state"
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self.state = ' '
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if self.token:
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break # emit current token
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else:
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continue
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elif nextchar in self.commenters:
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self.instream.readline()
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self.lineno = self.lineno + 1
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elif nextchar in self.wordchars or nextchar in self.quotes:
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self.token = self.token + nextchar
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else:
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self.pushback = [nextchar] + self.pushback
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if self.debug >= 2:
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print "I see punctuation in word state"
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state = ' '
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if self.token:
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break # emit current token
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else:
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continue
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result = self.token
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self.token = ''
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if self.debug >= 1:
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print "Token: " + result
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return result
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if __name__ == '__main__':
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lexer = shlex()
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while 1:
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tt = lexer.get_token()
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if tt != None:
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print "Token: " + repr(tt)
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else:
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break
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