Merge pull request #2358 from BjarniRunar/develop

Created dirty-db-cleaner.py - prunes old history from dirty.db files

bin/dirty-db-cleaner.py

@@ -0,0 +1,45 @@
+#!/usr/bin/python -u
+#
+# Created by Bjarni R. Einarsson, placed in the public domain. Go wild!
+#
+import json
+import os
+import sys
+
+try:
+    dirtydb_input = sys.argv[1]
+    dirtydb_output = '%s.new' % dirtydb_input
+    assert(os.path.exists(dirtydb_input))
+    assert(not os.path.exists(dirtydb_output))
+except:
+    print 
+    print 'Usage: %s /path/to/dirty.db' % sys.argv[0]
+    print 
+    print 'Note: Will create a file named dirty.db.new in the same folder,'
+    print '      please make sure permissions are OK and a file by that'
+    print '      name does not exist already. This script works by omitting'
+    print '      duplicate lines from the dirty.db file, keeping only the'
+    print '      last (latest) instance. No revision data should be lost,'
+    print '      but be careful, make backups. If it breaks you get to keep'
+    print '      both pieces!'
+    print
+    sys.exit(1)
+
+dirtydb = {}
+lines = 0
+with open(dirtydb_input, 'r') as fd:
+    print 'Reading %s' % dirtydb_input
+    for line in fd:
+        lines += 1
+        data = json.loads(line)
+        dirtydb[data['key']] = line
+        if lines % 10000 == 0:
+            sys.stderr.write('.')
+print
+print 'OK, found %d unique keys in %d lines' % (len(dirtydb), lines)
+
+with open(dirtydb_output, 'w') as fd:
+    for data in dirtydb.values():
+        fd.write(data)
+
+print 'Wrote data to %s. All done!' % dirtydb_output