reload_db.py

   1 #! /usr/bin/env python
   2 """Reload a dump into DB
   3
   4 This file is a part of XSetBg.
   5
   6 """
   7
   8 __author__ = "Oleg Broytman <phd@phdru.name>"
   9 __copyright__ = "Copyright (C) 2007-2015 PhiloSoft Design"
  10 __license__ = "GNU GPL"
  11
  12 import sys
  13 from sqlobject import SQLObjectNotFound
  14 from sqlobject.sqlbuilder import Insert
  15 from xsetbg_conf import xsetbg_conf
  16 from xsetbg_db import recreate_db, SQLiteMassInsert
  17
  18
  19 def convert_str(s):
  20     if s == "None":
  21         return None
  22     else:
  23         return int(float(s))
  24
  25
  26 fs_encoding = xsetbg_conf.get("images", "fs_encoding")
  27 dump_file = open(sys.argv[1], 'rU')
  28 xsetbg_db = recreate_db()
  29 count_new = count_old = 0
  30
  31 with SQLiteMassInsert() as txn:
  32     for line in dump_file:
  33         id, timestamp, filename = line.strip().split(None, 2)
  34         id = convert_str(id)
  35         timestamp = convert_str(timestamp)
  36         filename = filename.decode(fs_encoding)
  37         try:
  38             row = xsetbg_db.byFull_name(filename)
  39         except SQLObjectNotFound:
  40             values = {'last_shown': timestamp,
  41                       'full_name': filename.encode('utf-8')}
  42             if id:
  43                 values['id'] = id
  44             query = txn.sqlrepr(Insert(xsetbg_db.sqlmeta.table, values=values))
  45             txn.query(query)
  46             count_new += 1
  47         else:
  48             assert id is None or row.id == id
  49             if row.last_shown is not None:
  50                 assert row.last_shown == timestamp
  51             count_old += 1
  52
  53 dump_file.close()
  54
  55 print "New images:", count_new
  56 print "Existing images:", count_old