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check_copyright.pl
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check_copyright.pl
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#!/usr/bin/perl -w
#
# check_copyright.pl
# Copyright (C) 2007 Catalyst IT Ltd (http://www.catalyst.net.nz)
#
# 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 file incorporates work covered by the following copyright and
# permission notice:
#
# Copyright (C) 2006 Serious Hack Inc. (http://www.serioushack.com)
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free
# Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
# Boston, MA 02110-1301, USA
#
use strict;
use Cwd;
use File::Copy;
use File::Find;
use File::Temp;
# Directories which contain licensed files
my @SRC_DIRS = ('htdocs', 'test');
my %detected;
sub process_file
{
my $filename = shift;
open INPUT, "$filename" or die "Cannot open $filename as input.";
my $in_copyright = 0; # 0 = before the header
my @copyright_holders;
my $license = '';
my $license_version = 0;
my $license_upgradable = 0;
my $check_carefully = 0; # Could indicate proprietary code
while (<INPUT>) {
s/\r//g;
if ('' eq $license) {
# We only look at the first license statement
if (m/under (the terms of )?the GNU (General Public|GPL)/) {
$license = 'GPL';
}
elsif (m/under (the terms of )?the GNU (Lesser General|LGPL|Lesser GPL)/) {
$license = 'LGPL';
}
elsif (m|subject to version ([\d.]+) of the PHP license|) {
$license = 'PHP';
$license_version = $1;
}
elsif (m|\@license\s+(http://[^\s]+)?(.*?)$|) {
if ($1 and !$2) {
$license = $1;
} else {
$license = $2;
}
}
elsif (m|see\s+<?([^\s]+?)>?\s+.*for.*license|i) {
$license = $1;
}
elsif (m/released under (the|a)?(.+?) Licen[cs]e/i) {
my $s = $2;
$s =~ s/both //gi;
$s =~ s/license and/and/gi;
$s =~ s/GNU //gi;
$s =~ s/Lesser GPL library/LGPL/gi;
# Trim the string
$s =~ s/^\s+//g;
$s =~ s/\s+$//g;
$license = $s;
}
elsif (m/Licen[cs]e:\s+(GPL|LGPL|BSD)/i) {
$license = uc($1);
}
}
if ($license eq 'GPL' or $license eq 'LGPL') {
if (0 == $license_version and m|version ([\d.]+) of the License|) {
$license_version = $1;
}
if ($license_version and m|any later version|) {
$license_upgradable = 1;
}
}
my $potential_holder = '';
if (m/(copyright(\s+\(c\))?|\(c\))\s+([\d\-,; ]+\s+)?(.*?)$/i) {
$potential_holder = $4;
}
elsif (m|authors?:?\s+([^,;]+)|i) {
$potential_holder = $1;
}
if ($potential_holder) {
my $s = $potential_holder;
# Ignore contributors
if ($s =~ m/Contributions from/i or $s =~ m/credits? to/i) {
$s = '';
}
# Ignore specific sentences
$s = '' if $s =~ m/(notice|legislation|statement|field for)/i;
$s = '' if $s =~ m/based on work by/i;
# That's a bad sign... Should double-check these ones
if ($s =~ m/All rights reserved/i) {
$check_carefully = 1;
}
$s =~ s/All rights reserved//gi;
$s =~ s/All rights//gi;
# Useless words
$s =~ s/the authors//gi;
$s =~ s/and others//gi;
$s =~ s/author://gi;
$s =~ s/copyright//gi;
$s =~ s/\xA9//gi;
$s =~ s/©//gi;
$s =~ s/((199\d|20\d\d)[,\-]?)+//gi;
$s =~ s/onwards//gi;
$s =~ s/portions from//gi;
$s =~ s/additional modifications//gi;
$s =~ s/(and )?released (under)?.*$//gi;
$s =~ s/don't translate.*$//g;
$s =~ s/USER->get//g;
$s =~ s/userid//g;
$s =~ s/names in.*$//g;
$s =~ s/data (for|at).*$//g;
# Remove emails and URLs
$s =~ s/<[^>]+>//gi;
$s =~ s/\([^)]+\)//gi;
$s =~ s{http://[^\s]+}{}gi;
# Remove useless whitespace and punctuation
$s =~ s{[\(\),:;=\|\$+"]}{}g;
$s =~ s{\\n}{}g;
$s =~ s{//$}{}g;
$s =~ s{[{}]}{}g;
$s =~ s/\s{2,}/ /g;
$s =~ s{\s[.'/]}{}gi;
$s =~ s{^[/']}{}gi;
$s =~ s{['/]\s}{}gi;
$s =~ s{['/]$}{}gi;
$s =~ s{\s-\s}{}gi;
$s =~ s/\s{2,}/ /g;
$s =~ s{^\s+}{}g;
$s =~ s{\s+$}{}g;
if ($s) {
push @copyright_holders, $s;
}
}
}
close INPUT;
# Fill-in which license these files/URL refer to
$license = 'MIT or Academic Free License 2.1' if $license eq 'http://mochikit.com/';
$license = 'MIT' if $license eq 'scriptaculous.js';
$license = 'BSD' if $license eq 'http://www.opensource.org/licenses/bsd-license.php';
$license .= $license_version if $license_version != 0;
$license .= '+' if $license_upgradable;
if ($check_carefully and !$license) {
# These ones need to be considered carefully since the default
# is full copyright, not public domain
$license = 'proprietary?';
}
my %saw;
my @unique_copyright_holders = grep(!$saw{$_}++, @copyright_holders);
if (@unique_copyright_holders > 0) {
if ($license) {
print &Cwd::cwd()."/$filename: $license, ".join(', ', @unique_copyright_holders)."\n";
} else {
# This is fine, the overall project license applies.
#print STDERR &Cwd::cwd()."/$filename: copyright holders, but no license information\n";
}
} elsif ($license) {
print &Cwd::cwd()."/$filename: $license, unknown author(s)\n";
} else {
# This is not a problem in itself, the overall project license applies.
#print STDERR &Cwd::cwd()."/$filename\n";#": no license information or copyright holders\n";
}
}
sub process_standard_files
{
# Find all php and javascript files in the standard directories
File::Find::find sub { /^.*\.(php|js)$/s && process_file($_) }, @SRC_DIRS;
}
sub main
{
if (@ARGV > 0) {
while (@ARGV > 0) {
process_file(shift @ARGV);
}
} else {
&process_standard_files;
}
}
&main;