# filename-length -- lintian check script -*- perl -*-

# Copyright (C) 2011 Niels Thykier <niels@thykier.net>
#
# 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, you can find it on the World Wide
# Web at http://www.gnu.org/copyleft/gpl.html, or write to the Free
# Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
# MA 02110-1301, USA.

package Lintian::filename_length;
use strict;
use warnings;

use Lintian::Tags qw(tag);

use constant FILENAME_LENGTH_LIMIT => 80;

# We could derive this from data/fields/architectures, but that
# contains things like kopensolaris-sparc64 and kfreebsd-sparc64,
# neither of which Debian offically supports.
use constant LONGEST_ARCHITECTURE => length 'kfreebsd-amd64';

sub run {

my $pkg = shift;
my $type = shift;
my $info = shift;
my $proc = shift;
# pkg_version(_arch)?.type
# - here we pay for length of "name_version"
my $len = length($pkg) + length($proc->pkg_version) + 1;
my $extra;

if ($type eq 'binary' || $type eq 'source'){
    # Here we add length .deb / .dsc (in both cases +4)
    $len += 4;
} else {
    # .udeb, thats a +5
    $len += 5;
}

if ($type ne 'source') {
    # non-src pkgs have architecture as well
    if ($proc->pkg_arch ne 'all'){
        my $real = $len + 1 + length($proc->pkg_arch);
        $len  += 1 + LONGEST_ARCHITECTURE;
        $extra = "$real ($len)";
    } else {
        # _all has length 4
        $len += 4;
    }
}
$extra = $len unless defined $extra;

tag 'package-has-long-file-name', "$extra > ". FILENAME_LENGTH_LIMIT
    if $len > FILENAME_LENGTH_LIMIT;

return if $type ne 'source';

# Reset to work with elements of the dsc file.
$len = 0;

foreach my $entry (split m/\n/o, $info->field('files')//''){
    my $filename;
    my $flen;
    $entry =~ s/^\s++//o;
    next unless $entry;
    (undef, undef, $filename) = split m/\s++/o, $entry;
    next unless $filename;
    $flen = length($filename);
    $len = $flen if ($flen > $len);
}

if ($len > FILENAME_LENGTH_LIMIT){
    tag 'source-package-component-has-long-file-name', "$len > " . FILENAME_LENGTH_LIMIT;
}


}

1;

# Local Variables:
# indent-tabs-mode: nil
# cperl-indent-level: 4
# End:
# vim: syntax=perl sw=4 sts=4 sr et
