Trac #15972: IPython ProfileDirError if IPython was never run

The following fails if IPython was never run before:
{{{
./sage -t src/sage/misc/ascii_art.py
**********************************************************************
File "src/sage/misc/ascii_art.py", line 42, in sage.misc.ascii_art
Failed example:
    shell = get_test_shell()
Exception raised:
    Traceback (most recent call last):
      File "/usr/local/src/sage-config/local/lib/python2.7/site-
packages/sage/doctest/forker.py", line 480, in _run
        self.execute(example, compiled, test.globs)
      File "/usr/local/src/sage-config/local/lib/python2.7/site-
packages/sage/doctest/forker.py", line 839, in execute
        exec compiled in globs
      File "<doctest sage.misc.ascii_art[6]>", line 1, in <module>
        shell = get_test_shell()
      File "/usr/local/src/sage-config/local/lib/python2.7/site-
packages/sage/misc/interpreter.py", line 549, in get_test_shell
        app.initialize(argv=[])
      File "<string>", line 2, in initialize
      File "/usr/local/src/sage-config/local/lib/python2.7/site-
packages/IPython/config/application.py", line 89, in catch_config_error
        return method(app, *args, **kwargs)
      File "/usr/local/src/sage-config/local/lib/python2.7/site-
packages/IPython/terminal/ipapp.py", line 312, in initialize
        super(TerminalIPythonApp, self).initialize(argv)
      File "<string>", line 2, in initialize
      File "/usr/local/src/sage-config/local/lib/python2.7/site-
packages/IPython/config/application.py", line 89, in catch_config_error
        return method(app, *args, **kwargs)
      File "/usr/local/src/sage-config/local/lib/python2.7/site-
packages/IPython/core/application.py", line 381, in initialize
        self.load_config_file()
      File "/usr/local/src/sage-config/local/lib/python2.7/site-
packages/sage/misc/interpreter.py", line 626, in load_config_file
        get_ipython_dir(), 'sage').location
      File "/usr/local/src/sage-config/local/lib/python2.7/site-
packages/IPython/core/profiledir.py", line 242, in
find_profile_dir_by_name
        raise ProfileDirError('Profile directory not found in paths: %s'
% dirname)
    ProfileDirError: Profile directory not found in paths: profile_sage
**********************************************************************
}}}

Running `./sage` once fixes this problem but the following always fails:
{{{
./sage --nodotsage -t src/sage/misc/ascii_art.py
}}}

URL: http://trac.sagemath.org/15972
Reported by: jdemeyer
Ticket author(s): John Palmieri
Reviewer(s): Volker Braun

src/sage/misc/interpreter.py

@@ -614,17 +614,35 @@ def __init__(self, **kwargs):
 
 
     def load_config_file(self, *args, **kwds):
+        """
+        TESTS:
+
+        Test that :trac:`15972` has been fixed::
+
+            sage: from sage.misc.temporary_file import tmp_dir
+            sage: from sage.misc.interpreter import SageTerminalApp
+            sage: d = tmp_dir()
+            sage: IPYTHONDIR = os.environ['IPYTHONDIR']
+            sage: os.environ['IPYTHONDIR'] = d
+            sage: SageTerminalApp().load_config_file()
+            sage: os.environ['IPYTHONDIR'] = IPYTHONDIR
+        """
         from IPython.config.loader import PyFileConfigLoader, ConfigFileNotFound
-        from IPython.core.profiledir import ProfileDir
+        from IPython.core.profiledir import ProfileDir, ProfileDirError
         from IPython.utils.path import get_ipython_dir
 
         conf = Config()
         conf._merge(DEFAULT_SAGE_CONFIG)
         conf._merge(self.command_line_config)
 
         # Get user config.
-        sage_profile_dir = ProfileDir.find_profile_dir_by_name(
-            get_ipython_dir(), 'sage').location
+        try:
+            sage_profile_dir = ProfileDir.find_profile_dir_by_name(
+                get_ipython_dir(), 'sage').location
+        except ProfileDirError:
+            d = ProfileDir.create_profile_dir_by_name(
+                get_ipython_dir(), 'sage')
+            sage_profile_dir = d.location
         try:
             cl = PyFileConfigLoader('ipython_config.py', sage_profile_dir)
             conf._merge(cl.load_config())