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Guido van Rossum  committed 0a0434e

Adding shlex and netrc by Eric Raymond.

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  • Parent commits ecd1154
  • Branches legacy-trunk

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Files changed (2)

File Lib/netrc.py

+#!/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()
+

File Lib/shlex.py

+#!/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
+