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 import sys
   9 from sqlobject import SQLObjectNotFound
  10 from sqlobject.sqlbuilder import Insert
  11 from xsetbg_conf import xsetbg_conf
  12 from xsetbg_db import recreate_db, SQLiteMassInsert
  13
  14
  15 def convert_str(s):
  16     if s == "None":
  17         return None
  18     else:
  19         return int(float(s))
  20
  21
  22 fs_encoding = xsetbg_conf.get("images", "fs_encoding")
  23 dump_file = open(sys.argv[1], 'rU')
  24 xsetbg_db = recreate_db()
  25 count_new = count_old = 0
  26
  27 with SQLiteMassInsert() as txn:
  28     for line in dump_file:
  29         id, timestamp, filename = line.strip().split(None, 2)
  30         id = convert_str(id)
  31         timestamp = convert_str(timestamp)
  32         filename = filename.decode(fs_encoding)
  33         try:
  34             row = xsetbg_db.byFull_name(filename)
  35         except SQLObjectNotFound:
  36             values = {'last_shown': timestamp,
  37                       'full_name': filename.encode('utf-8')}
  38             if id:
  39                 values['id'] = id
  40             query = txn.sqlrepr(Insert(xsetbg_db.sqlmeta.table, values=values))
  41             txn.query(query)
  42             count_new += 1
  43         else:
  44             assert id is None or row.id == id
  45             if row.last_shown is not None:
  46                 assert row.last_shown == timestamp
  47             count_old += 1
  48
  49 dump_file.close()
  50
  51 print "New images:", count_new
  52 print "Existing images:", count_old