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+#! /usr/bin/env python
+#
+# Fuzzy merge of bibliographies.
+#
+# A hiearchy of matching tests is implemented:
+#
+# Reference type
+# Year of publication
+# Month of publication (if known)
+# Volume number (if article type)
+# Page numbers (if known)
+# Author surnames
+# Fuzzy match on title exclusing white space and punctuation characters,
+# using Levenstein distance
+#
+# Really useful when you are jointly writing a paper and the authors have partially
+# overlapping bib files with different cite key conventions.
+
+# Copyright (c) 2007, Peter Corke
+#
+# All rights reserved.
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+#
+# * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+# * Redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution.
+# * The name of the copyright holder may not be used to endorse or
+# promote products derived from this software without specific prior
+# written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+# THE POSSIBILITY OF SUCH DAMAGE.
+
+import Bibliography;
+import BibEntry;
+import BibTeX;
+import string;
+import sys;
+import optparse;
+
+## parse switches
+usage = '''usage: %prog [options] [bibfiles]
+
+:: Fuzzy merge of bibliographies.'''
+p = optparse.OptionParser(usage)
+p.add_option('--dthresh', dest='dthresh', action='store', type='int',
+ help='set the fuzzy match tolerance (Levenstein distance) for title string');
+p.add_option('--showdup', dest='showdup', action='store_true',
+ help='show information about proposed duplicates');
+p.add_option('-v', '--verbose', dest='verbose', action='store_true',
+ help='print some extra information');
+p.set_defaults(dthresh=2, showdup=False, verbose=False);
+(opts, args) = p.parse_args()
+globals().update(opts.__dict__)
+
+if len(args) == 0 and sys.stdin.isatty():
+ p.print_help();
+ sys.exit(0);
+
+
+unique = BibTeX.BibTeX();
+dupcount = 0;
+
+def action(bib, filename):
+ global dupcount, unique;
+
+ if verbose:
+ print >> sys.stderr, "%d records read from %s" % (len(bib), filename)
+
+ # for each new bib entry
+ for be in bib:
+ # check against all existing
+ for ub in unique:
+ if be.match(ub, dthresh=dthresh):
+ if verbose:
+ print >> sys.stderr, " -[%s] %s" % (be.getKey(), be);
+ dupcount += 1;
+ if showdup:
+ print >> sys.stderr, "============================="
+ ub.write(sys.stderr);
+ print >> sys.stderr, "---------- duplicate from %s" % bib.getFilename();
+ be.write(sys.stderr);
+ break;
+ else:
+ if verbose:
+ print >> sys.stderr, " +[%s] %s" % (be.getKey(), be);
+ unique.insertEntry(be);
+
+## read the input files
+bib = BibTeX.BibTeX();
+if args:
+ for f in args:
+ bib = BibTeX.BibTeX();
+ bib.parseFile(f);
+ action(bib, f);
+else:
+ bib = BibTeX.BibTeX();
+ bib.parseFile();
+ action(bib, '(stdin)');
+
+
+print >> sys.stderr, "New bib has %d records, %d duplicates found" % (len(unique), dupcount);
+
+unique.write();