Created genutils.get_ipython_dir to encapsulate the logic

that was in ipmaker.py.  This function should be used
throughtout IPython to find the ~/.ipython directory or
its Win23 equivalent.  I have not modified ipmaker.py to use
this function yet as we are too close to a release.

IPython/config/api.py

@@ -16,7 +16,7 b' __docformat__ = "restructuredtext en"'
 #-------------------------------------------------------------------------------
 
 import os
-from IPython.config.cutils import get_home_dir, get_ipython_dir
+from IPython.genutils import get_home_dir, get_ipython_dir
 from IPython.external.configobj import ConfigObj
 
 # Traitlets config imports

IPython/config/cutils.py

@@ -22,71 +22,6 b' import sys'
 # Normal code begins
 #---------------------------------------------------------------------------
 
-class HomeDirError(Exception):
-    pass
-
-def get_home_dir():
-    """Return the closest possible equivalent to a 'home' directory.
-
-    We first try $HOME.  Absent that, on NT it's $HOMEDRIVE\$HOMEPATH.
-
-    Currently only Posix and NT are implemented, a HomeDirError exception is
-    raised for all other OSes. """
-
-    isdir = os.path.isdir
-    env = os.environ
-    try:
-        homedir = env['HOME']
-        if not isdir(homedir):
-            # in case a user stuck some string which does NOT resolve to a
-            # valid path, it's as good as if we hadn't foud it
-            raise KeyError
-        return homedir
-    except KeyError:
-        if os.name == 'posix':
-            raise HomeDirError,'undefined $HOME, IPython can not proceed.'
-        elif os.name == 'nt':
-            # For some strange reason, win9x returns 'nt' for os.name.
-            try:
-                homedir = os.path.join(env['HOMEDRIVE'],env['HOMEPATH'])
-                if not isdir(homedir):
-                    homedir = os.path.join(env['USERPROFILE'])
-                    if not isdir(homedir):
-                        raise HomeDirError
-                return homedir
-            except:
-                try:
-                    # Use the registry to get the 'My Documents' folder.
-                    import _winreg as wreg
-                    key = wreg.OpenKey(wreg.HKEY_CURRENT_USER,
-                                       "Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders")
-                    homedir = wreg.QueryValueEx(key,'Personal')[0]
-                    key.Close()
-                    if not isdir(homedir):
-                        e = ('Invalid "Personal" folder registry key '
-                             'typically "My Documents".\n'
-                             'Value: %s\n'
-                             'This is not a valid directory on your system.' %
-                             homedir)
-                        raise HomeDirError(e)
-                    return homedir
-                except HomeDirError:
-                    raise
-                except:
-                    return 'C:\\'
-        elif os.name == 'dos':
-            # Desperate, may do absurd things in classic MacOS. May work under DOS.
-            return 'C:\\'
-        else:
-            raise HomeDirError,'support for your operating system not implemented.'
-
-def get_ipython_dir():
-    ipdir_def = '.ipython'
-    home_dir = get_home_dir()
-    ipdir = os.path.abspath(os.environ.get('IPYTHONDIR',
-                                           os.path.join(home_dir,ipdir_def)))
-    return ipdir
-
 def import_item(key):
     """
     Import and return bar given the string foo.bar.

IPython/genutils.py

@@ -979,6 +979,22 b' def get_home_dir():'
         else:
             raise HomeDirError,'support for your operating system not implemented.'
 
+
+def get_ipython_dir():
+    """Get the IPython directory for this platform and user.
+    
+    This uses the logic in `get_home_dir` to find the home directory
+    and the adds either .ipython or _ipython to the end of the path.
+    """
+    if os.name == 'posix':
+         ipdir_def = '.ipython'
+    else:
+         ipdir_def = '_ipython'
+    home_dir = get_home_dir()
+    ipdir = os.path.abspath(os.environ.get('IPYTHONDIR',
+                                           os.path.join(home_dir,ipdir_def)))
+    return ipdir
+
 #****************************************************************************
 # strings and text
 

IPython/kernel/config/__init__.py

@@ -17,7 +17,7 b' __docformat__ = "restructuredtext en"'
 
 from IPython.external.configobj import ConfigObj
 from IPython.config.api import ConfigObjManager
-from IPython.config.cutils import get_ipython_dir
+from IPython.genutils import get_ipython_dir
 
 default_kernel_config = ConfigObj()
 

IPython/kernel/controllerservice.py

@@ -50,7 +50,7 b' from IPython.kernel.engineservice import \\'
     IEngineSerialized, \
     IEngineQueued
     
-from IPython.config import cutils
+from IPython.genutils import get_ipython_dir
 from IPython.kernel import codeutil
 
 #-------------------------------------------------------------------------------
@@ -170,7 +170,7 b' class ControllerService(object, service.Service):'
     
     def _getEngineInfoLogFile(self):
         # Store all logs inside the ipython directory
-        ipdir = cutils.get_ipython_dir()
+        ipdir = get_ipython_dir()
         pjoin = os.path.join
         logdir_base = pjoin(ipdir,'log')
         if not os.path.isdir(logdir_base):

IPython/kernel/scripts/ipcluster.py

@@ -93,7 +93,7 b' from subprocess import Popen,call'
 # IPython imports
 #---------------------------------------------------------------------------
 from IPython.tools import utils
-from IPython.config import cutils
+from IPython.genutils import get_ipython_dir
 
 #---------------------------------------------------------------------------
 # Normal code begins
@@ -180,7 +180,7 b' def clusterLocal(opt,arg):'
     """Start a cluster on the local machine."""
     
     # Store all logs inside the ipython directory
-    ipdir = cutils.get_ipython_dir()
+    ipdir = get_ipython_dir()
     pjoin = os.path.join
 
     logfile = opt.logfile
@@ -265,7 +265,7 b' def clusterRemote(opt,arg):'
     sshx = clConfig.get('sshx',os.environ.get('IPYTHON_SSHX','sshx'))
     
     # Store all logs inside the ipython directory
-    ipdir = cutils.get_ipython_dir()
+    ipdir = get_ipython_dir()
     pjoin = os.path.join
 
     logfile = opt.logfile