Linux: check in Debian's licensecheck utility.

There are some custom patches to recognize more license headers,
most of them are upstreamable and I'm going to submit them upstream.

BUG=28291

Review URL: http://codereview.chromium.org/7875009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@100816 0039d316-1c4b-4281-b951-d872f2087c98

4 files changed, 964 insertions, 0 deletions

diff --git a/third_party/devscripts/COPYING b/third_party/devscripts/COPYING
new file mode 100644
index 0000000..c74d291
--- /dev/null
+++ b/third_party/devscripts/COPYING
@@ -0,0 +1,340 @@
+		    GNU GENERAL PUBLIC LICENSE
+		       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.
+       51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+			    Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
+the GNU Library General Public License instead.)  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
+  To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
+you have.  You must make sure that they, too, receive or can get the
+source code.  And you must show them these terms so they know their
+rights.
+
+  We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+
+  Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software.  If the software is modified by someone else and passed on, we
+want its recipients to know that what they have is not the original, so
+that any problems introduced by others will not reflect on the original
+authors' reputations.
+
+  Finally, any free program is threatened constantly by software
+patents.  We wish to avoid the danger that redistributors of a free
+program will individually obtain patent licenses, in effect making the
+program proprietary.  To prevent this, we have made it clear that any
+patent must be licensed for everyone's free use or not licensed at all.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+		    GNU GENERAL PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License.  The "Program", below,
+refers to any such program or work, and a "work based on the Program"
+means either the Program or any derivative work under copyright law:
+that is to say, a work containing the Program or a portion of it,
+either verbatim or with modifications and/or translated into another
+language.  (Hereinafter, translation is included without limitation in
+the term "modification".)  Each licensee is addressed as "you".
+
+Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope.  The act of
+running the Program is not restricted, and the output from the Program
+is covered only if its contents constitute a work based on the
+Program (independent of having been made by running the Program).
+Whether that is true depends on what the Program does.
+
+  1. You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
+conspicuously and appropriately publish on each copy an appropriate
+copyright notice and disclaimer of warranty; keep intact all the
+notices that refer to this License and to the absence of any warranty;
+and give any other recipients of the Program a copy of this License
+along with the Program.
+
+You may charge a fee for the physical act of transferring a copy, and
+you may at your option offer warranty protection in exchange for a fee.
+
+  2. You may modify your copy or copies of the Program or any portion
+of it, thus forming a work based on the Program, and copy and
+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+
+    a) You must cause the modified files to carry prominent notices
+    stating that you changed the files and the date of any change.
+
+    b) You must cause any work that you distribute or publish, that in
+    whole or in part contains or is derived from the Program or any
+    part thereof, to be licensed as a whole at no charge to all third
+    parties under the terms of this License.
+
+    c) If the modified program normally reads commands interactively
+    when run, you must cause it, when started running for such
+    interactive use in the most ordinary way, to print or display an
+    announcement including an appropriate copyright notice and a
+    notice that there is no warranty (or else, saying that you provide
+    a warranty) and that users may redistribute the program under
+    these conditions, and telling the user how to view a copy of this
+    License.  (Exception: if the Program itself is interactive but
+    does not normally print such an announcement, your work based on
+    the Program is not required to print an announcement.)
+
+These requirements apply to the modified work as a whole.  If
+identifiable sections of that work are not derived from the Program,
+and can be reasonably considered independent and separate works in
+themselves, then this License, and its terms, do not apply to those
+sections when you distribute them as separate works.  But when you
+distribute the same sections as part of a whole which is a work based
+on the Program, the distribution of the whole must be on the terms of
+this License, whose permissions for other licensees extend to the
+entire whole, and thus to each and every part regardless of who wrote it.
+
+Thus, it is not the intent of this section to claim rights or contest
+your rights to work written entirely by you; rather, the intent is to
+exercise the right to control the distribution of derivative or
+collective works based on the Program.
+
+In addition, mere aggregation of another work not based on the Program
+with the Program (or with a work based on the Program) on a volume of
+a storage or distribution medium does not bring the other work under
+the scope of this License.
+
+  3. You may copy and distribute the Program (or a work based on it,
+under Section 2) in object code or executable form under the terms of
+Sections 1 and 2 above provided that you also do one of the following:
+
+    a) Accompany it with the complete corresponding machine-readable
+    source code, which must be distributed under the terms of Sections
+    1 and 2 above on a medium customarily used for software interchange; or,
+
+    b) Accompany it with a written offer, valid for at least three
+    years, to give any third party, for a charge no more than your
+    cost of physically performing source distribution, a complete
+    machine-readable copy of the corresponding source code, to be
+    distributed under the terms of Sections 1 and 2 above on a medium
+    customarily used for software interchange; or,
+
+    c) Accompany it with the information you received as to the offer
+    to distribute corresponding source code.  (This alternative is
+    allowed only for noncommercial distribution and only if you
+    received the program in object code or executable form with such
+    an offer, in accord with Subsection b above.)
+
+The source code for a work means the preferred form of the work for
+making modifications to it.  For an executable work, complete source
+code means all the source code for all modules it contains, plus any
+associated interface definition files, plus the scripts used to
+control compilation and installation of the executable.  However, as a
+special exception, the source code distributed need not include
+anything that is normally distributed (in either source or binary
+form) with the major components (compiler, kernel, and so on) of the
+operating system on which the executable runs, unless that component
+itself accompanies the executable.
+
+If distribution of executable or object code is made by offering
+access to copy from a designated place, then offering equivalent
+access to copy the source code from the same place counts as
+distribution of the source code, even though third parties are not
+compelled to copy the source along with the object code.
+
+  4. You may not copy, modify, sublicense, or distribute the Program
+except as expressly provided under this License.  Any attempt
+otherwise to copy, modify, sublicense or distribute the Program is
+void, and will automatically terminate your rights under this License.
+However, parties who have received copies, or rights, from you under
+this License will not have their licenses terminated so long as such
+parties remain in full compliance.
+
+  5. You are not required to accept this License, since you have not
+signed it.  However, nothing else grants you permission to modify or
+distribute the Program or its derivative works.  These actions are
+prohibited by law if you do not accept this License.  Therefore, by
+modifying or distributing the Program (or any work based on the
+Program), you indicate your acceptance of this License to do so, and
+all its terms and conditions for copying, distributing or modifying
+the Program or works based on it.
+
+  6. Each time you redistribute the Program (or any work based on the
+Program), the recipient automatically receives a license from the
+original licensor to copy, distribute or modify the Program subject to
+these terms and conditions.  You may not impose any further
+restrictions on the recipients' exercise of the rights granted herein.
+You are not responsible for enforcing compliance by third parties to
+this License.
+
+  7. If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot
+distribute so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you
+may not distribute the Program at all.  For example, if a patent
+license would not permit royalty-free redistribution of the Program by
+all those who receive copies directly or indirectly through you, then
+the only way you could satisfy both it and this License would be to
+refrain entirely from distribution of the Program.
+
+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
+apply and the section as a whole is intended to apply in other
+circumstances.
+
+It is not the purpose of this section to induce you to infringe any
+patents or other property right claims or to contest validity of any
+such claims; this section has the sole purpose of protecting the
+integrity of the free software distribution system, which is
+implemented by public license practices.  Many people have made
+generous contributions to the wide range of software distributed
+through that system in reliance on consistent application of that
+system; it is up to the author/donor to decide if he or she is willing
+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+  8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
+those countries, so that distribution is permitted only in or among
+countries not thus excluded.  In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+  9. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+Each version is given a distinguishing version number.  If the Program
+specifies a version number of this License which applies to it and "any
+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation.  If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+  10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
+to ask for permission.  For software which is copyrighted by the Free
+Software Foundation, write to the Free Software Foundation; we sometimes
+make exceptions for this.  Our decision will be guided by the two goals
+of preserving the free status of all derivatives of our free software and
+of promoting the sharing and reuse of software generally.
+
+			    NO WARRANTY
+
+  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
+PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
+OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
+TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+
+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+		     END OF TERMS AND CONDITIONS
+
+	    How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) 19yy  <name of author>
+
+    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
+    (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, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
+
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+    Gnomovision version 69, Copyright (C) 19yy name of author
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Library General
+Public License instead of this License.
diff --git a/third_party/devscripts/README.chromium b/third_party/devscripts/README.chromium
new file mode 100644
index 0000000..9f88075
--- /dev/null
+++ b/third_party/devscripts/README.chromium
@@ -0,0 +1,7 @@
+Name: devscripts
+URL: http://anonscm.debian.org/gitweb/?p=devscripts/devscripts.git
+Version: 2.11.1
+Security Critical: no
+
+Description:
+This directory contains selected tools from the Debian's devscripts collection.
diff --git a/third_party/devscripts/chromium-1.patch b/third_party/devscripts/chromium-1.patch
new file mode 100644
index 0000000..05cd2cc
--- /dev/null
+++ b/third_party/devscripts/chromium-1.patch
@@ -0,0 +1,62 @@
+--- licensecheck.pl.orig	2011-09-12 15:54:33.369133553 -0700
++++ licensecheck.pl	2011-09-12 16:53:51.189069386 -0700
+@@ -406,7 +406,7 @@
+ 	$extrainfo = " (with Qt exception)$extrainfo"
+     }
+ 
+-    if ($licensetext =~ /(All changes made in this file will be lost|DO NOT (EDIT|delete this file)|Generated by)/i) {
++    if ($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";
+     }
+ 
+@@ -437,7 +437,7 @@
+ 	$license = "QPL $license";
+     }
+ 
+-    if ($licensetext =~ /http:\/\/opensource\.org\/licenses\/mit-license\.php/) {
++    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) $license";
+@@ -459,6 +459,12 @@
+ 	}
+     }
+ 
++    if ($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/) {
++        $license = "BSD-like $license";
++    }
++
+     if ($licensetext =~ /Mozilla Public License Version ([^ ]+)/) {
+ 	$license = "MPL (v$1) $license";
+     }
+@@ -495,7 +501,7 @@
+ 	$license = "SGI Free Software License B $license";
+     }
+ 
+-    if ($licensetext =~ /is in the public domain/i) {
++    if ($licensetext =~ /is.*in the public domain|disclaims copyright/i) {
+ 	$license = "Public domain";
+     }
+ 
+@@ -503,6 +509,10 @@
+ 	$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) " : '') . $license;
+@@ -515,6 +525,8 @@
+     if ($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) {
diff --git a/third_party/devscripts/licensecheck.pl b/third_party/devscripts/licensecheck.pl
new file mode 100755
index 0000000..36fcdf3
--- /dev/null
+++ b/third_party/devscripts/licensecheck.pl
@@ -0,0 +1,555 @@
+#!/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
+# (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/>.
+
+=head1 NAME
+
+licensecheck - simple license checker for source files
+
+=head1 SYNOPSIS
+
+B<licensecheck> B<--help>|B<--version>
+
+B<licensecheck> [B<--no-conf>] [B<--verbose>] [B<--copyright>]
+[B<-l>|B<--lines=>I<N>] [B<-i>|B<--ignore=>I<regex>] [B<-c>|B<--check=>I<regex>]
+[B<-r>|B<--recursive>] I<list of files and directories to check>
+
+=head1 DESCRIPTION
+
+B<licensecheck> attempts to determine the license that applies to each file
+passed to it, by searching the start of the file for text belonging to
+various licenses.
+
+If any of the arguments passed are directories, B<licensecheck> will add
+the files contained within to the list of files to process.
+
+=head1 OPTIONS
+
+=over 4
+
+=item B<--verbose>, B<--no-verbose>
+
+Specify whether to output the text being processed from each file before
+the corresponding license information.
+
+Default is to be quiet.
+
+=item B<-l=>I<N>, B<--lines=>I<N>
+
+Specify the number of lines of each file's header which should be parsed
+for license information. (Default is 60).
+
+=item B<-i=>I<regex>, B<--ignore=>I<regex>
+
+When processing the list of files and directories, the regular
+expression specified by this option will be used to indicate those which
+should not be considered (e.g. backup files, VCS metadata).
+
+=item B<-r>, B<--recursive>
+
+Specify that the contents of directories should be added
+recursively.
+
+=item B<-c=>I<regex>, B<--check=>I<regex>
+
+Specify a pattern against which filenames will be matched in order to
+decide which files to check the license of.
+
+The default includes common source files.
+
+=item B<--copyright>
+
+Also display copyright text found within the file
+
+=item B<--no-conf>, B<--noconf>
+
+Do not read any configuration files. This can only be used as the first
+option given on the command-line.
+
+=back
+
+=head1 CONFIGURATION VARIABLES
+
+The two configuration files F</etc/devscripts.conf> and
+F<~/.devscripts> are sourced by a shell in that order to set
+configuration variables.  Command line options can be used to override
+configuration file settings.  Environment variable settings are
+ignored for this purpose.  The currently recognised variables are:
+
+=over 4
+
+=item B<LICENSECHECK_VERBOSE>
+
+If this is set to I<yes>, then it is the same as the B<--verbose> command
+line parameter being used. The default is I<no>.
+
+=item B<LICENSECHECK_PARSELINES>
+
+If this is set to a positive number then the specified number of lines
+at the start of each file will be read whilst attempting to determine
+the license(s) in use.  This is equivalent to the B<--lines> command line
+option.
+
+=back
+
+=head1 LICENSE
+
+This code is copyright by Adam D. Barratt <I<adam@adam-barratt.org.uk>>,
+all rights reserved; based on a script of the same name from the KDE
+SDK, which is copyright by <I<dfaure@kde.org>>.
+This program comes with ABSOLUTELY NO WARRANTY.
+You are free to redistribute this code under the terms of the GNU
+General Public License, version 2 or later.
+
+=head1 AUTHOR
+
+Adam D. Barratt <adam@adam-barratt.org.uk>
+
+=cut
+
+use strict;
+use warnings;
+use Getopt::Long;
+use File::Basename;
+
+sub fatal($);
+sub parse_copyright($);
+sub parselicense($);
+
+my $progname = basename($0);
+
+# From dpkg-source
+my $default_ignore_regex = '
+# Ignore general backup files
+(?:^|/).*~$|
+# Ignore emacs recovery files
+(?:^|/)\.#.*$|
+# Ignore vi swap files
+(?:^|/)\..*\.swp$|
+# Ignore baz-style junk files or directories
+(?:^|/),,.*(?:$|/.*$)|
+# File-names that should be ignored (never directories)
+(?:^|/)(?:DEADJOE|\.cvsignore|\.arch-inventory|\.bzrignore|\.gitignore)$|
+# File or directory names that should be ignored
+(?:^|/)(?:CVS|RCS|\.deps|\{arch\}|\.arch-ids|\.svn|\.hg|_darcs|\.git|
+\.shelf|_MTN|\.bzr(?:\.backup|tags)?)(?:$|/.*$)
+';
+
+# Take out comments and newlines
+$default_ignore_regex =~ s/^#.*$//mg;
+$default_ignore_regex =~ s/\n//sg;
+
+my $default_check_regex = '\.(c(c|pp|xx)?|h(h|pp|xx)?|f(77|90)?|p(l|m)|xs|sh|php|py|rb|java|vala|el|sc(i|e)|cs|pas|inc|dtd|xsl|mod)$';
+
+my $modified_conf_msg;
+
+my ($opt_verbose, $opt_lines, $opt_noconf, $opt_ignore_regex, $opt_check_regex)
+  = ('', '', '', '', '');
+my $opt_recursive = 0;
+my $opt_copyright = 0;
+my ($opt_help, $opt_version);
+my $def_lines = 60;
+
+# Read configuration files and then command line
+# This is boilerplate
+
+if (@ARGV and $ARGV[0] =~ /^--no-?conf$/) {
+    $modified_conf_msg = "  (no configuration files read)";
+    shift;
+} else {
+    my @config_files = ('/etc/devscripts.conf', '~/.devscripts');
+    my %config_vars = (
+		       'LICENSECHECK_VERBOSE' => 'no',
+		       'LICENSECHECK_PARSELINES' => $def_lines,
+		      );
+    my %config_default = %config_vars;
+
+    my $shell_cmd;
+    # Set defaults
+    foreach my $var (keys %config_vars) {
+	$shell_cmd .= qq[$var="$config_vars{$var}";\n];
+    }
+    $shell_cmd .= 'for file in ' . join(" ", @config_files) . "; do\n";
+    $shell_cmd .= '[ -f $file ] && . $file; done;' . "\n";
+    # Read back values
+    foreach my $var (keys %config_vars) { $shell_cmd .= "echo \$$var;\n" }
+    my $shell_out = `/bin/bash -c '$shell_cmd'`;
+    @config_vars{keys %config_vars} = split /\n/, $shell_out, -1;
+
+    # Check validity
+    $config_vars{'LICENSECHECK_VERBOSE'} =~ /^(yes|no)$/
+	or $config_vars{'LICENSECHECK_VERBOSE'} = 'no';
+    $config_vars{'LICENSECHECK_PARSELINES'} =~ /^[1-9][0-9]*$/
+	or $config_vars{'LICENSECHECK_PARSELINES'} = $def_lines;
+
+    foreach my $var (sort keys %config_vars) {
+	if ($config_vars{$var} ne $config_default{$var}) {
+	    $modified_conf_msg .= "  $var=$config_vars{$var}\n";
+	}
+    }
+    $modified_conf_msg ||= "  (none)\n";
+    chomp $modified_conf_msg;
+
+    $opt_verbose = $config_vars{'LICENSECHECK_VERBOSE'} eq 'yes' ? 1 : 0;
+    $opt_lines = $config_vars{'LICENSECHECK_PARSELINES'};
+}
+
+GetOptions("help|h" => \$opt_help,
+	   "version|v" => \$opt_version,
+	   "verbose!" => \$opt_verbose,
+	   "lines|l=i" => \$opt_lines,
+	   "ignore|i=s" => \$opt_ignore_regex,
+	   "recursive|r" => \$opt_recursive,
+	   "check|c=s" => \$opt_check_regex,
+	   "copyright" => \$opt_copyright,
+	   "noconf" => \$opt_noconf,
+	   "no-conf" => \$opt_noconf,
+	   )
+    or die "Usage: $progname [options] filelist\nRun $progname --help for more details\n";
+
+$opt_lines = $def_lines if $opt_lines !~ /^[1-9][0-9]*$/;
+$opt_ignore_regex = $default_ignore_regex if ! length $opt_ignore_regex;
+$opt_check_regex = $default_check_regex if ! length $opt_check_regex;
+
+if ($opt_noconf) {
+    fatal "--no-conf is only acceptable as the first command-line option!";
+}
+if ($opt_help) { help(); exit 0; }
+if ($opt_version) { version(); exit 0; }
+
+die "Usage: $progname [options] filelist\nRun $progname --help for more details\n" unless @ARGV;
+
+$opt_lines = $def_lines if not defined $opt_lines;
+
+my @files = ();
+my @find_args = ();
+my $files_count = @ARGV;
+
+push @find_args, qw(-maxdepth 1) unless $opt_recursive;
+push @find_args, qw(-follow -type f -print);
+
+while (@ARGV) {
+    my $file = shift @ARGV;
+
+    if (-d $file) {
+	open FIND, '-|', 'find', $file, @find_args
+	    or die "$progname: couldn't exec find: $!\n";
+
+	while (<FIND>) {
+	    chomp;
+	    next unless m%$opt_check_regex%;
+	    # Skip empty files
+	    next if (-z $_);
+	    push @files, $_ unless m%$opt_ignore_regex%;
+	}
+	close FIND;
+    } else {
+	next unless ($files_count == 1) or $file =~ m%$opt_check_regex%;
+	push @files, $file unless $file =~ m%$opt_ignore_regex%;
+    }
+}
+
+while (@files) {
+    my $file = shift @files;
+    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;
+
+    my $copyright_indicator_regex = '
+	(?:copyright	# The full word
+	|copr\.		# Legally-valid abbreviation
+	|\x{00a9}	# Unicode character COPYRIGHT SIGN
+	|\xc2\xa9	# Unicode copyright sign encoded in iso8859
+	|\(c\)		# Legally-null representation of sign
+	)';
+    my $copyright_disindicator_regex = '
+	\b(?:info(?:rmation)?	# Discussing copyright information
+	|notice			# Discussing the notice
+	|and|or                 # Part of a sentence
+	)\b';
+
+    if (m%$copyright_indicator_regex(?::\s*|\s+)(\S.*)$%ix) {
+	$match = $1;
+
+	# Ignore lines matching "see foo for copyright information" etc.
+	if ($match !~ m%^\s*$copyright_disindicator_regex%ix) {
+	    # De-cruft
+	    $match =~ s/([,.])?\s*$//;
+	    $match =~ s/$copyright_indicator_regex//igx;
+	    $match =~ s/^\s+//;
+	    $match =~ s/\s{2,}/ /g;
+	    $match =~ s/\\@/@/g;
+	    $copyright = $match;
+	}
+    }
+
+    return $copyright;
+}
+
+sub help {
+   print <<"EOF";
+Usage: $progname [options] filename [filename ...]
+Valid options are:
+   --help, -h             Display this message
+   --version, -v          Display version and copyright info
+   --no-conf, --noconf    Don't read devscripts config files; must be
+                          the first option given
+   --verbose              Display the header of each file before its
+                            license information
+   --lines, -l            Specify how many lines of the file header
+                            should be parsed for license information
+                            (Default: $def_lines)
+   --check, -c            Specify a pattern indicating which files should
+                             be checked
+                             (Default: '$default_check_regex')
+   --recursive, -r        Add the contents of directories recursively
+   --copyright            Also display the file's copyright
+   --ignore, -i		  Specify that files / directories matching the
+                            regular expression should be ignored when
+                            checking files
+                            (Default: '$default_ignore_regex')
+
+Default settings modified by devscripts configuration files:
+$modified_conf_msg
+EOF
+}
+
+sub version {
+    print <<"EOF";
+This is $progname, from the Debian devscripts package, version ###VERSION###
+Copyright (C) 2007, 2008 by Adam D. Barratt <adam\@adam-barratt.org.uk>; based
+on a script of the same name from the KDE SDK by <dfaure\@kde.org>.
+
+This program comes with ABSOLUTELY NO WARRANTY.
+You are free to redistribute this code under the terms of the
+GNU General Public License, version 2, or (at your option) any
+later version.
+EOF
+}
+
+sub parselicense($) {
+    my ($licensetext) = @_;
+
+    my $gplver = "";
+    my $extrainfo = "";
+    my $license = "";
+
+    if ($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,/
+	and length $gplver) {
+	$license = "GPL$gplver$extrainfo $license";
+    }
+
+    if ($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) {
+	    $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) {
+	    $license = "BSD (3 clause) $license";
+	} elsif ($licensetext =~ /Redistributions of source code must retain the above copyright notice/i) {
+	    $license = "BSD (2 clause) $license";
+	} else {
+	    $license = "BSD $license";
+	}
+    }
+
+    if ($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/) {
+        $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) $license";
+    }
+
+    if ($licensetext =~ /is free software under the Artistic [Ll]icense/) {
+	$license = "Artistic $license";
+    }
+
+    if ($licensetext =~ /This program is free software; you can redistribute it and\/or modify it under the same terms as Perl itself/) {
+	$license = "Perl $license";
+    }
+
+    if ($licensetext =~ /under the Apache License, Version ([^ ]+)/) {
+	$license = "Apache (v$1) $license";
+    }
+
+    if ($licensetext =~ /This source file is subject to version ([^ ]+) of the PHP license/) {
+	$license = "PHP (v$1) $license";
+    }
+
+    if ($licensetext =~ /under the terms of the CeCILL /) {
+	$license = "CeCILL $license";
+    }
+
+    if ($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) {
+	$license = "Public domain";
+    }
+
+    if ($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;
+}