diff --git a/IPython/Extensions/ipy_app_completers.py b/IPython/Extensions/ipy_app_completers.py
index 4d2ca5b..629ef79 100644
--- a/IPython/Extensions/ipy_app_completers.py
+++ b/IPython/Extensions/ipy_app_completers.py
@@ -14,4 +14,6 @@ from ipy_completers import *
 ip.set_hook('complete_command', apt_completer, re_key = '.*apt-get')
 ip.set_hook('complete_command', svn_completer, str_key = 'svn')
 ip.set_hook('complete_command', hg_completer, str_key = 'hg')
-ip.set_hook('complete_command', bzr_completer, str_key = 'bzr')
+
+# the old bzr completer is deprecated, we recommend ipy_bzr
+#ip.set_hook('complete_command', bzr_completer, str_key = 'bzr')
diff --git a/IPython/Extensions/ipy_bzr.py b/IPython/Extensions/ipy_bzr.py
new file mode 100644
index 0000000..eda1838
--- /dev/null
+++ b/IPython/Extensions/ipy_bzr.py
@@ -0,0 +1,334 @@
+# Copyright (C) 2004, 2005 Aaron Bentley
+# <aaron@aaronbentley.com>
+#
+#    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 cmd
+from itertools import chain
+import os
+import shlex
+import stat
+import string
+import sys
+
+from bzrlib import osutils
+from bzrlib.branch import Branch
+from bzrlib.config import config_dir, ensure_config_dir_exists
+from bzrlib.commands import get_cmd_object, get_all_cmds, get_alias
+from bzrlib.errors import BzrError
+from bzrlib.workingtree import WorkingTree
+
+
+
+SHELL_BLACKLIST = set(['rm', 'ls'])
+COMPLETION_BLACKLIST = set(['shell'])
+
+
+class BlackListedCommand(BzrError):
+    def __init__(self, command):
+        BzrError.__init__(self, "The command %s is blacklisted for shell use" %
+                          command)
+
+
+class CompletionContext(object):
+    def __init__(self, text, command=None, prev_opt=None, arg_pos=None):
+        self.text = text
+        self.command = command
+        self.prev_opt = prev_opt
+        self.arg_pos = None
+
+    def get_completions(self):
+        try:
+            return self.get_completions_or_raise()
+        except Exception, e:
+            print e, type(e)
+            return []
+
+    def get_option_completions(self):
+        try:
+            command_obj = get_cmd_object(self.command)
+        except BzrError:
+            return []
+        opts = [o+" " for o in iter_opt_completions(command_obj)]
+        return list(filter_completions(opts, self.text))
+
+    def get_completions_or_raise(self):
+        if self.command is None:
+            if '/' in self.text:
+                iter = iter_executables(self.text)
+            else:
+                iter = (c+" " for c in iter_command_names() if
+                        c not in COMPLETION_BLACKLIST)
+            return list(filter_completions(iter, self.text))
+        if self.prev_opt is None:
+            completions = self.get_option_completions()
+            if self.command == "cd":
+                iter = iter_dir_completions(self.text)
+                completions.extend(list(filter_completions(iter, self.text)))
+            else:
+                iter = iter_file_completions(self.text)
+                completions.extend(filter_completions(iter, self.text))
+            return completions
+
+
+class PromptCmd(cmd.Cmd):
+
+    def __init__(self):
+        cmd.Cmd.__init__(self)
+        self.prompt = "bzr> "
+        try:
+            self.tree = WorkingTree.open_containing('.')[0]
+        except:
+            self.tree = None
+        self.set_title()
+        self.set_prompt()
+        self.identchars += '-'
+        ensure_config_dir_exists()
+        self.history_file = osutils.pathjoin(config_dir(), 'shell-history')
+        readline.set_completer_delims(string.whitespace)
+        if os.access(self.history_file, os.R_OK) and \
+            os.path.isfile(self.history_file):
+            readline.read_history_file(self.history_file)
+        self.cwd = os.getcwd()
+
+    def write_history(self):
+        readline.write_history_file(self.history_file)
+
+    def do_quit(self, args):
+        self.write_history()
+        raise StopIteration
+
+    def do_exit(self, args):
+        self.do_quit(args)
+
+    def do_EOF(self, args):
+        print
+        self.do_quit(args)
+
+    def postcmd(self, line, bar):
+        self.set_title()
+        self.set_prompt()
+
+    def set_prompt(self):
+        if self.tree is not None:
+            try:
+                prompt_data = (self.tree.branch.nick, self.tree.branch.revno(),
+                               self.tree.relpath('.'))
+                prompt = " %s:%d/%s" % prompt_data
+            except:
+                prompt = ""
+        else:
+            prompt = ""
+        self.prompt = "bzr%s> " % prompt
+
+    def set_title(self, command=None):
+        try:
+            b = Branch.open_containing('.')[0]
+            version = "%s:%d" % (b.nick, b.revno())
+        except:
+            version = "[no version]"
+        if command is None:
+            command = ""
+        sys.stdout.write(terminal.term_title("bzr %s %s" % (command, version)))
+
+    def do_cd(self, line):
+        if line == "":
+            line = "~"
+        line = os.path.expanduser(line)
+        if os.path.isabs(line):
+            newcwd = line
+        else:
+            newcwd = self.cwd+'/'+line
+        newcwd = os.path.normpath(newcwd)
+        try:
+            os.chdir(newcwd)
+            self.cwd = newcwd
+        except Exception, e:
+            print e
+        try:
+            self.tree = WorkingTree.open_containing(".")[0]
+        except:
+            self.tree = None
+
+    def do_help(self, line):
+        self.default("help "+line)
+
+    def default(self, line):
+        args = shlex.split(line)
+        alias_args = get_alias(args[0])
+        if alias_args is not None:
+            args[0] = alias_args.pop(0)
+
+        commandname = args.pop(0)
+        for char in ('|', '<', '>'):
+            commandname = commandname.split(char)[0]
+        if commandname[-1] in ('|', '<', '>'):
+            commandname = commandname[:-1]
+        try:
+            if commandname in SHELL_BLACKLIST:
+                raise BlackListedCommand(commandname)
+            cmd_obj = get_cmd_object(commandname)
+        except (BlackListedCommand, BzrError):
+            return os.system(line)
+
+        try:
+            if too_complicated(line):
+                return os.system("bzr "+line)
+            else:
+                return (cmd_obj.run_argv_aliases(args, alias_args) or 0)
+        except BzrError, e:
+            print e
+        except KeyboardInterrupt, e:
+            print "Interrupted"
+        except Exception, e:
+#            print "Unhandled error:\n%s" % errors.exception_str(e)
+            print "Unhandled error:\n%s" % (e)
+
+
+    def completenames(self, text, line, begidx, endidx):
+        return CompletionContext(text).get_completions()
+
+    def completedefault(self, text, line, begidx, endidx):
+        """Perform completion for native commands.
+
+        :param text: The text to complete
+        :type text: str
+        :param line: The entire line to complete
+        :type line: str
+        :param begidx: The start of the text in the line
+        :type begidx: int
+        :param endidx: The end of the text in the line
+        :type endidx: int
+        """
+        (cmd, args, foo) = self.parseline(line)
+        if cmd == "bzr":
+            cmd = None
+        return CompletionContext(text, command=cmd).get_completions()
+
+
+def run_shell():
+    try:
+        prompt = PromptCmd()
+        try:
+            prompt.cmdloop()
+        finally:
+            prompt.write_history()
+    except StopIteration:
+        pass
+
+
+def iter_opt_completions(command_obj):
+    for option_name, option in command_obj.options().items():
+        yield "--" + option_name
+        short_name = option.short_name()
+        if short_name:
+            yield "-" + short_name
+
+
+def iter_file_completions(arg, only_dirs = False):
+    """Generate an iterator that iterates through filename completions.
+
+    :param arg: The filename fragment to match
+    :type arg: str
+    :param only_dirs: If true, match only directories
+    :type only_dirs: bool
+    """
+    cwd = os.getcwd()
+    if cwd != "/":
+        extras = [".", ".."]
+    else:
+        extras = []
+    (dir, file) = os.path.split(arg)
+    if dir != "":
+        listingdir = os.path.expanduser(dir)
+    else:
+        listingdir = cwd
+    for file in chain(os.listdir(listingdir), extras):
+        if dir != "":
+            userfile = dir+'/'+file
+        else:
+            userfile = file
+        if userfile.startswith(arg):
+            if os.path.isdir(listingdir+'/'+file):
+                userfile+='/'
+                yield userfile
+            elif not only_dirs:
+                yield userfile + ' '
+
+
+def iter_dir_completions(arg):
+    """Generate an iterator that iterates through directory name completions.
+
+    :param arg: The directory name fragment to match
+    :type arg: str
+    """
+    return iter_file_completions(arg, True)
+
+
+def iter_command_names(hidden=False):
+    for real_cmd_name, cmd_class in get_all_cmds():
+        if not hidden and cmd_class.hidden:
+            continue
+        for name in [real_cmd_name] + cmd_class.aliases:
+            # Don't complete on aliases that are prefixes of the canonical name
+            if name == real_cmd_name or not real_cmd_name.startswith(name):
+                yield name
+
+
+def iter_executables(path):
+    dirname, partial = os.path.split(path)
+    for filename in os.listdir(dirname):
+        if not filename.startswith(partial):
+            continue
+        fullpath = os.path.join(dirname, filename)
+        mode=os.lstat(fullpath)[stat.ST_MODE]
+        if stat.S_ISREG(mode) and 0111 & mode:
+            yield fullpath + ' '
+
+
+def filter_completions(iter, arg):
+    return (c for c in iter if c.startswith(arg))
+
+
+def iter_munged_completions(iter, arg, text):
+    for completion in iter:
+        completion = str(completion)
+        if completion.startswith(arg):
+            yield completion[len(arg)-len(text):]+" "
+
+
+def too_complicated(line):
+    for char in '|<>*?':
+        if char in line:
+            return True
+    return False
+
+    
+### IPython mods start
+
+def init_ipython(ip):
+    def bzr_completer(self,ev):
+        #print "bzr complete"
+        tup =  ev.line.split(None,2)
+        if len(tup) > 2:
+            cmd = tup[1]
+        else:
+            cmd = None
+                  
+        return CompletionContext(ev.symbol, command = cmd).get_completions()
+    ip.set_hook('complete_command', bzr_completer, str_key = 'bzr')    
+
+    
+