fixed issue 1225, NEWINSTALL ignored

gluon/fileutils.py

@@ -15,6 +15,7 @@ import tarfile
 import glob
 import time
 import datetime
+import logging
 from http import HTTP
 from gzip import open as gzopen
 
@@ -240,19 +241,20 @@ def w2p_pack(filename, path, compiled=False):
     tarfp.close()
     os.unlink(tarname)
 
-
-def w2p_unpack(filename, path, delete_tar=True):
-
-    if filename=='welcome.w2p' and (
-        not os.path.exists('welcome.w2p') or \
-            os.path.exists('NEWINSTALL')):
+def create_welcome_w2p():
+    if not os.path.exists('welcome.w2p') or os.path.exists('NEWINSTALL'):
         try:
             w2p_pack('welcome.w2p', 'applications/welcome')
             os.unlink('NEWINSTALL')
+            logging.info("New installation: created welcome.w2p file")
         except:
-            msg = "New installation: unable to create welcome.w2p file"
-            sys.stderr.write(msg)
+            logging.error("New installation error: unable to create welcome.w2p file")
 
+
+def w2p_unpack(filename, path, delete_tar=True):
+
+    if filename=='welcome.w2p':
+        create_welcome_w2p()
     filename = abspath(filename)
     path = abspath(path)
     if filename[-4:] == '.w2p' or filename[-3:] == '.gz':