logger.py: create directory if not exists

webapp/graphite/logger.py

@@ -12,7 +12,10 @@
 See the License for the specific language governing permissions and
 limitations under the License."""
 
-import os, logging
+import errno
+import logging
+import os
+
 from logging.handlers import TimedRotatingFileHandler as Rotater
 try:
     from logging import NullHandler
@@ -30,6 +33,18 @@ def emit(self, record):
 from django.conf import settings
 
 
+# this can't be put in util.py because of circular depency between log.py
+# and util.py
+def _mkdir_p(path):
+    try:
+        os.makedirs(path)
+    except OSError as exc:  # Directory already exists
+        if exc.errno == errno.EEXIST and os.path.isdir(path):
+            pass
+        else:
+            raise
+
+
 class GraphiteLogger:
   def __init__(self):
     self.infoLogger = self._config_logger(
@@ -73,6 +88,7 @@ def _config_logger(log_file_name, name, activate,
             formatter = logging.Formatter(
                 fmt='%(asctime)s.%(msecs)03d :: %(message)s',
                 datefmt='%Y-%m-%d,%H:%M:%S')
+            _mkdir_p(settings.LOG_DIR)
             log_file = os.path.join(settings.LOG_DIR, log_file_name)
             if settings.LOG_ROTATION:  # if we want to rotate logs
                 handler = Rotater(log_file, when=when, backupCount=backupCount)