Make check_licenses about 5x faster.

third_party/devscripts/licensecheck.pl

 #!/usr/bin/perl -w
 # This script was originally based on the script of the same name from
 # the KDE SDK (by dfaure@kde.org)
 #
 # This version is
 #   Copyright (C) 2007, 2008 Adam D. Barratt
 #
 # 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 2 of the License, or
@@ skipping 259 matching lines @@
     my $content = '';
     my $copyright_match;
     my $copyright = '';
     my $license = '';
     my %copyrights;
 
     open (F, "<$file") or die "Unable to access $file\n";
     while (<F>) {
         last if ($. > $opt_lines);
         $content .= $_;
-        $copyright_match = parse_copyright($_);
-        if ($copyright_match) {
-            $copyrights{lc("$copyright_match")} = "$copyright_match";
-        }
     }
     close(F);
 
     $copyright = join(" / ", values %copyrights);
 
     print qq(----- $file header -----\n$content----- end header -----\n\n)
         if $opt_verbose;
 
     $content =~ tr/\t\r\n/ /;
     # Remove C / C++ comments
     $content =~ s#(\*/|/[/*])##g;
     $content =~ tr% A-Za-z.,@;0-9\(\)/-%%cd;
     $content =~ s/ c //g; # Remove fortran comments
     $content =~ tr/ //s;
 
     $license = parselicense($content);
     print "$file: ";
-    print "*No copyright* " unless $copyright;
     print $license . "\n";
     print "  [Copyright: " . $copyright . "]\n"
       if $copyright and $opt_copyright;
     print "\n" if $opt_copyright;
 }
 
 sub parse_copyright($) {
     my $copyright = '';
     my $match;
 
@@ skipping 79 matching lines @@
     if ($licensetext =~ /version ([^ ]+) (?:\(?only\)?.? )?(?:of the GNU (Affero )?General Public License )?as published by the Free Software Foundation/i or
         $licensetext =~ /GNU (?:Affero )?General Public License as published by the Free Software Foundation; version ([^ ]+) /i) {
 
         $gplver = " (v$1)";
     } elsif ($licensetext =~ /GNU (Affero ?)General Public License, version ([^ ]+?)[ .]/) {
         $gplver = " (v$1)";
     } elsif ($licensetext =~ /either version ([^ ]+) of the License, or \(at your option\) any later version/) {
         $gplver = " (v$1 or later)";
     }
 
-    if ($licensetext =~ /(?:675 Mass Ave|59 Temple Place|51 Franklin Steet|02139|02111-1307)/i) {
-        $extrainfo = " (with incorrect FSF address)$extrainfo";
-    }
-
     if ($licensetext =~ /permission (?:is (also granted|given))? to link (the code of )?this program with (any edition of )?(Qt|the Qt library)/i) {
         $extrainfo = " (with Qt exception)$extrainfo"
     }
 
     if ($licensetext =~ /(All changes made in this file will be lost|DO NOT (EDIT|delete this file)|Generated (automatically|by|from)|generated.*file)/i) {
         $license = "GENERATED FILE";
     }
 
     if ($licensetext =~ /is free software.? you can redistribute it and\/or modify it under the terms of the (GNU (Library|Lesser) General Public License|LGPL)/i) {
         $license = "LGPL$gplver$extrainfo $license";
     }
 
-    if ($licensetext =~ /is free software.? you can redistribute it and\/or modify it under the terms of the (GNU Affero General Public License|AGPL)/i) {
-        $license = "AGPL$gplver$extrainfo $license";
-    }
-
     if ($licensetext =~ /is free software.? you (can|may) redistribute it and\/or modify it under the terms of (?:version [^ ]+ (?:\(?only\)? )?of )?the GNU General Public License/i) {
         $license = "GPL$gplver$extrainfo $license";
-    }
-
-    if ($licensetext =~ /is distributed under the terms of the GNU General Public License,/
+    } elsif ($licensetext =~ /is distributed under the terms of the GNU General Public License,/
         and length $gplver) {
         $license = "GPL$gplver$extrainfo $license";
-    }
-
-    if ($licensetext =~ /is distributed.*terms.*GPL/) {
+    } elsif ($licensetext =~ /is distributed.*terms.*GPL/) {
         $license = "GPL (unversioned/unknown version) $license";
     }
 
     if ($licensetext =~ /This file is part of the .*Qt GUI Toolkit. This file may be distributed under the terms of the Q Public License as defined/) {
         $license = "QPL (part of Qt) $license";
     } elsif ($licensetext =~ /may be distributed under the terms of the Q Public License as defined/) {
         $license = "QPL $license";
     }
 
     if ($licensetext =~ /opensource\.org\/licenses\/mit-license\.php/) {
         $license = "MIT/X11 (BSD like) $license";
     } elsif ($licensetext =~ /Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files \(the Software\), to deal in the Software/) {
         $license = "MIT/X11 (BSD like) $license";
     }
 
     if ($licensetext  =~ /Permission to use, copy, modify, and(\/or)? distribute this software for any purpose with or without fee is hereby granted, provided.*copyright notice.*permission notice.*all copies/) {
         $license = "ISC $license";
     }
 
     if ($licensetext =~ /THIS SOFTWARE IS PROVIDED .*AS IS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY/) {
-        if ($licensetext =~ /All advertising materials mentioning features or use of this software must display the following acknowledge?ment.*This product includes software developed by/i) {
+        if ($licensetext =~ /All advertising materials mentioning features or use of this software must display the following/) {
             $license = "BSD (4 clause) $license";
-        } elsif ($licensetext =~ /(The name of .*? may not|Neither the names? of .*? nor the names of (its|their) contributors may) be used to endorse or promote products derived from this software/i) {
+        } elsif ($licensetext =~ /be used to endorse or promote products derived from this software/) {
             $license = "BSD (3 clause) $license";
-        } elsif ($licensetext =~ /Redistributions of source code must retain the above copyright notice/i) {
+        } elsif ($licensetext =~ /Redistributions of source code must retain the above copyright notice/) {
             $license = "BSD (2 clause) $license";
         } else {
             $license = "BSD $license";
         }
-    }
-
-    if ($licensetext =~ /Use of this source code is governed by a BSD-style license/) {
+    } elsif ($licensetext =~ /Use of this source code is governed by a BSD-style license/) {
         $license = "BSD-like $license";
-    } elsif ($licensetext =~ /BSD terms apply.*see.*COPYING.*for details/) {
+    } elsif ($licensetext =~ /BSD terms apply/) {
         $license = "BSD-like $license";
     }
 
     if ($licensetext =~ /Mozilla Public License Version ([^ ]+)/) {
         $license = "MPL (v$1) $license";
     }
 
     if ($licensetext =~ /Released under the terms of the Artistic License ([^ ]+)/) {
         $license = "Artistic (v$1) $license";
     }
@@ skipping 19 matching lines @@
     }
 
     if ($licensetext =~ /under the terms of the CeCILL-([^ ]+) /) {
         $license = "CeCILL-$1 $license";
     }
 
     if ($licensetext =~ /under the SGI Free Software License B/) {
         $license = "SGI Free Software License B $license";
     }
 
-    if ($licensetext =~ /is.*in the public domain|disclaims copyright/i) {
+    if ($licensetext =~ /in the public domain/i) {
         $license = "Public domain";
     }
 
     if ($licensetext =~ /terms of the Common Development and Distribution License(, Version ([^(]+))? \(the License\)/) {
         $license = "CDDL " . ($1 ? "(v$2) " : '') . $license;
     }
 
     if ($licensetext =~ /Microsoft Permissive License \(Ms-PL\)/) {
         $license = "Ms-PL $license";
     }
 
     if ($licensetext =~ /Permission is hereby granted, free of charge, to any person or organization obtaining a copy of the software and accompanying documentation covered by this license \(the \"Software\"\)/ or
         $licensetext =~ /Boost Software License([ ,-]+Version ([^ ]+)?(\.))/i) {
         $license = "BSL " . ($1 ? "(v$2) " : '') . $license;
     }
 
     if ($licensetext =~ /PYTHON SOFTWARE FOUNDATION LICENSE (VERSION ([^ ]+))/i) {
         $license = "PSF " . ($1 ? "(v$2) " : '') . $license;
     }
 
     if ($licensetext =~ /The origin of this software must not be misrepresented.*Altered source versions must be plainly marked as such.*This notice may not be removed or altered from any source distribution/ or
         $licensetext =~ /see copyright notice in zlib\.h/) {
         $license = "zlib/libpng $license";
     } elsif ($licensetext =~ /This code is released under the libpng license/) {
         $license = "libpng $license";
     }
 
-    if ($licensetext =~ /Do What The Fuck You Want To Public License, Version ([^, ]+)/i) {
-        $license = "WTFPL (v$1)";
-    }
-
-    if ($licensetext =~ /Do what The Fuck You Want To Public License/i) {
-        $license = "WTFPL";
-    }
-
-    if ($licensetext =~ /(License WTFPL|Under (the|a) WTFPL)/i) {
-        $license = "WTFPL";
-    }
-
     $license = "UNKNOWN" if (!length($license));
 
     return $license;
 }
 
 sub fatal($) {
     my ($pack,$file,$line);
     ($pack,$file,$line) = caller();
     (my $msg = "$progname: fatal error at line $line:\n@_\n") =~ tr/\0//d;
     $msg =~ s/\n\n$/\n/;
     die $msg;
 }