Ensure install paths exist

setup.py

@@ -51,6 +51,11 @@ def install():
 def join_url(x, y):
     return '/' + '/'.join([z for z in x.split('/') + y.split('/') if z])
 
+def ensure_dir(f):
+    d = os.path.dirname(f)
+    if not os.path.exists(d):
+        os.makedirs(d)
+
 conf_path = config.CONF_PATH
 install_path = config.INSTALL_PATH
 
@@ -64,7 +69,8 @@ def join_url(x, y):
     print 'Customizing install for ReadTheDocs.org build servers...'
     conf_path = '.' + conf_path
     install_path = '.' +  install_path
-    config.VERSION_FILE_PATH = '.' + config.VERSION_FILE_PATH
+    #config.VERSION_FILE_PATH = '.' + config.VERSION_FILE_PATH
+    os.environ('ZTPS_INSTALL_ROOT') = '.'
     from subprocess import call
     call(['docs/setup_rtd_files.sh'])
     packages.append('client')
@@ -158,6 +164,8 @@ def join_url(x, y):
 if install():
     custom_path = os.environ.get('ZTPS_INSTALL_ROOT')
     if custom_path:
-        shutil.copy('VERSION', join_url(custom_path, config.VERSION_FILE_PATH))
+        version_file =  join_url(custom_path, config.VERSION_FILE_PATH)
     else:
-        shutil.copy('VERSION', config.VERSION_FILE_PATH)
+        version_file =  config.VERSION_FILE_PATH
+    ensure_dir(version_file)
+    shutil.copy('VERSION', version_file)