recipe/generic_mysql: add support for Python 3 (NEEDS TO BE RELEASED BEFORE)

slapos/recipe/generic_mysql/mysql.py

+from __future__ import print_function
 import os
 import subprocess
 import time
@@ -6,7 +7,7 @@ import pytz
 
 def updateMysql(mysql_upgrade_binary, mysql_binary, mysql_script_file):
   sleep = 0
-  with open(mysql_script_file) as script_file:
+  with open(mysql_script_file, 'rb') as script_file:
     mysql_script = script_file.read()
   mysql_list = mysql_binary, '-B'
   mysql_tzinfo_to_sql_list = (
@@ -19,32 +20,32 @@ def updateMysql(mysql_upgrade_binary, mysql_binary, mysql_script_file):
         stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
       result = mysql_upgrade.communicate()[0]
       if mysql_upgrade.returncode:
-        print "Command %r failed with result:\n%s" % (mysql_upgrade_binary, result)
+        print("Command %r failed with result:\n%s" % (mysql_upgrade_binary, result))
         break
-      print "MySQL database upgraded with result:\n%s" % result
+      print("MySQL database upgraded with result:\n%s" % result)
       mysql = subprocess.Popen(mysql_list, stdin=subprocess.PIPE,
           stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
       result = mysql.communicate(mysql_script)[0]
       if mysql.returncode:
-        print 'Command %r failed with:\n%s' % (mysql_list, result)
+        print('Command %r failed with:\n%s' % (mysql_list, result))
         break
       # import timezone database
       mysql_tzinfo_to_sql = subprocess.Popen(mysql_tzinfo_to_sql_list, stdin=subprocess.PIPE,
                                stdout=subprocess.PIPE, stderr=subprocess.PIPE)
       timezone_sql = mysql_tzinfo_to_sql.communicate()[0]
       if mysql_tzinfo_to_sql.returncode != 0:
-        print 'Command %r failed with:\n%s' % (mysql_tzinfo_to_sql_list, result)
+        print('Command %r failed with:\n%s' % (mysql_tzinfo_to_sql_list, result))
         break
       mysql = subprocess.Popen(mysql_list + ('mysql',), stdin=subprocess.PIPE,
                                stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
       result = mysql.communicate(timezone_sql)[0]
       if mysql.returncode:
-        print 'Command %r failed with:\n%s' % (mysql_list, result)
+        print('Command %r failed with:\n%s' % (mysql_list, result))
         break
-      print 'SlapOS initialisation script succesfully applied on database.'
+      print('SlapOS initialisation script succesfully applied on database.')
       return
     sleep = min(sleep+1, 30)
-    print 'Sleeping for %ss and retrying' % sleep
+    print('Sleeping for %ss and retrying' % sleep)
     sys.stdout.flush()
     sys.stderr.flush()
     time.sleep(sleep)