Untested fix for renaming projects under wine

When renaming a newly created project under wine, this stack trace would
greet you:

Traceback (most recent call last):
  File "bash\basher\__init__.py", line 2208, in OnLabelEdited
    self.data_store.rename_info(package, name_new))
  File "bash\bosh\__init__.py", line 1129, in rename_info
    return self._rename_operation(oldName, newName)
  File "bash\bosh\bain.py", line 1678, in _rename_operation
    return self[oldName].renameInstaller(newName, self)
  File "bash\bosh\bain.py", line 1532, in renameInstaller
    return self._installer_rename(data, name_new)
  File "bash\bosh\bain.py", line 982, in _installer_rename
    del data[g_path]
  File "bash\bolt.py", line 1254, in __delitem__
    del self.data[key]
KeyError: bolt.Path(u'test')

Upon restarting, things would become even worse, with the entire
Installers tab whited out. A different stack trace occured:

Traceback (most recent call last):
  File "bash\basher\__init__.py", line 3553, in OnShowPage
    self.currentPage.ShowPanel()
  File "bash\balt.py", line 1796, in _conversation_wrapper
    return func(*args, **kwargs)
  File "bash\basher\__init__.py", line 2898, in ShowPanel
    scan_data_dir)
  File "bash\balt.py", line 1796, in _conversation_wrapper
    return func(*args, **kwargs)
  File "bash\bosh\bain.py", line 1552, in _projects_walk_cache_wrapper
    return func(self, *args, **kwargs)
  File "bash\basher\__init__.py", line 2928, in _refresh_installers_if_needed
    refresh_info)
  File "bash\bosh\bain.py", line 1636, in irefresh
    progress, fullRefresh, refresh_info, deleted, pending, projects)
  File "bash\bosh\bain.py", line 1552, in _projects_walk_cache_wrapper
    return func(self, *args, **kwargs)
  File "bash\bosh\bain.py", line 1774, in _refreshInstallers
    _index=index, _fullRefresh=fullRefresh)
  File "bash\bosh\bain.py", line 1790, in refresh_installer
    installer.refreshBasic(progress, recalculate_project_crc=_fullRefresh)
  File "bash\bosh\bain.py", line 859, in refreshBasic
    return self._refreshBasic(progress, recalculate_project_crc)
  File "bash\bosh\bain.py", line 866, in _refreshBasic
    self._refreshSource(progress, recalculate_project_crc)
  File "bash\bosh\bain.py", line 1432, in _refreshSource
    recalculate_project_crc)
  File "bash\bosh\bain.py", line 1364, in _refresh_from_project_dir
    max_mtime = apRoot.mtime
  File "bash\bolt.py", line 778, in _getmtime
    return int(os.path.getmtime(self._s))
  File "C:\Python27\lib\genericpath.py", line 62, in getmtime
    return os.stat(filename).st_mtime
WindowsError: [Error 2] File not found: u'\\home\\infernio\\.wine-bash\\drive_c\\Program Files\\Steam\\steamapps\\common\\Skyrim Mods\\Bash Installers\\test'

Took a long time to figure out what's going on. I *think* this is
because we carry out the shell move first, then hit a refresh due to
wine / Linux / whatever weirdness, and that refresh removes the old
installer from the BAIN data store and creates a new one for whatever
you renamed it to.

The proper solution would be to suspend refreshes while in
_installer_rename (if the cause is indeed a refresh), i.e. making
_instalelr_rename atomic from the perspective of refreshes. In the
absence(?) of such a mechanism, we'll just go with two crappy if
statements - seems to do the job, but is probably racy as hell.

Author: Infernio

Mopy/bash/bosh/bain.py

@@ -978,10 +978,18 @@ def _installer_rename(self, data, newName):
             newPath = bass.dirs['installers'].join(newName)
             if not newPath.exists():
                 DataStore._rename_operation(data, g_path, newName)
-                #--Add the new archive to Bash and remove old one
+                # If we hit a refresh after that fs operation, BAIN may have
+                # already deleted the old installer and created a new one for
+                # the renamed path - undo that here
+                # TODO(inf) This is quite hacky - we need some way to suspend
+                #  refreshes while in _installer_rename, i.e. make it atomic
+                if g_path in data:
+                    del data[g_path]
+                if newName in data:
+                    del data[newName]
+                # Add the new archive to BAIN and remove old one
                 data[newName] = self
-                del data[g_path]
-                #--Update the iniInfos & modInfos for 'installer'
+                # Update the iniInfos & modInfos for 'installer'
                 from . import modInfos, iniInfos
                 mfiles = [x for x in modInfos.table.getColumn('installer') if
                           modInfos.table[x]['installer'] == self.archive]