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+#! /usr/bin/env python
+#
+# Filter bib records that match search criteria
+#
+# todo:
+# handle tex accent characters, utf-16 etc
+
+# 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;
+
+startDate = None;
+endDate = None;
+
+## parse switches
+usage = '''usage: %prog [options] [bibfiles]
+
+:: Filter bib records that match search criteria
+:: Multiple rules can be applied at the same time '''
+p = optparse.OptionParser(usage)
+p.add_option('--since', dest='since', action='store', type='str',
+ help='start date for selection, format YYYY or MM/YYYY');
+p.add_option('--before', dest='before', action='store', type='str',
+ help='end date for selection, format YYYY or MM/YYYY');
+p.add_option('-i', '--case', dest='caseSens', action='store_true',
+ help='make search case sensitive');
+p.add_option('--type', dest='type', action='store', type='str',
+ help='reference type to search (default all)');
+p.add_option('--field', dest='field', nargs=2, action='store', type='str',
+ help='field to search (default all) and the value which matches any substring in the specified field');
+p.add_option('--hasfield', dest='hasfield', action='store', type='str',
+ help='true if specified field is present');
+p.add_option('--brief', dest='showBrief', action='store_true',
+ help='show the matching records in brief format (default is BibTeX)');
+p.add_option('--count', dest='showCount', action='store_true',
+ help='show just the number of matching records');
+p.set_defaults(since=None, before=None, caseSens=False, type='all', hasfield=None, field=['all', '*'], showBrief=False, showCount=False);
+(opts, args) = p.parse_args()
+globals().update(opts.__dict__)
+
+if len(args) == 0 and sys.stdin.isatty():
+ p.print_help();
+ sys.exit(0);
+
+if since:
+ startDate = map(int, since.split('/'));
+if before:
+ endDate = map(int, before.split('/'));
+
+
+## read the input files
+bib = BibTeX.BibTeX();
+if args:
+ for f in args:
+ bib.parseFile(f);
+else:
+ bib.parseFile();
+
+#print >> sys.stderr, "looking for <%s> in field <%s>, reftype <%s>" % (field[1], field[0], type)
+
+# search the bibliography for all matches to the field query
+l = bib.search(field[0], field[1], type, caseSens);
+count = 0;
+for be in l:
+ # check if it has the required field
+ if hasfield:
+ if not be.getField(hasfield):
+ continue;
+
+ # check the date range
+ if be.afterDate(startDate) and be.beforeDate(endDate):
+ count += 1;
+ if not showCount:
+ if showBrief:
+ print be;
+ else:
+ be.write();
+
+if showCount:
+ print count;