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bib-diff.php
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bib-diff.php
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<?php
/*
CCCVTK, the Canadian Common CV Toolkit
Copyright (C) 2013-2014 Sylvain Hallé
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*
This script compares two BibTeX files, file1.bib and file2.bib, and displays
the keys from file1 that are not present in file2.
*/
if (count($argv) < 3 || strpos("help", $argv[1]) >= 0)
{
echo "Usage: php bib-diff.php <file1> <file2>\n";
echo "Displays the BibTeX keys in file1 that are not present in file2\n";
exit(1);
}
$keys_1 = get_keys(file_get_contents($argv[1]));
$keys_2 = get_keys(file_get_contents($argv[2]));
echo "Here are the keys from the first file not present in the second file:\n\n";
$diff = leo_array_diff($keys_1, $keys_2);
echo implode("\n", $diff);
echo "\n";
exit(0);
function get_keys($file_contents)
{
$matches = array();
preg_match_all("/@.*?\\{(.*?),/", $file_contents, $matches);
return $matches[1];
}
// http://stackoverflow.com/a/6700430
function leo_array_diff($a, $b) {
$map = array();
foreach($a as $val) $map[$val] = 1;
foreach($b as $val) unset($map[$val]);
return array_keys($map);
}
?>