diff options
Diffstat (limited to 'lib/Lintian/Check/Debian/TrailingWhitespace.pm')
-rw-r--r-- | lib/Lintian/Check/Debian/TrailingWhitespace.pm | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/lib/Lintian/Check/Debian/TrailingWhitespace.pm b/lib/Lintian/Check/Debian/TrailingWhitespace.pm new file mode 100644 index 0000000..465fa59 --- /dev/null +++ b/lib/Lintian/Check/Debian/TrailingWhitespace.pm @@ -0,0 +1,105 @@ +# debian/trailing-whitespace -- lintian check script -*- perl -*- +# +# based on debhelper check, +# Copyright (C) 1999 Joey Hess +# Copyright (C) 2000 Sean 'Shaleh' Perry +# Copyright (C) 2002 Josip Rodin +# Copyright (C) 2007 Russ Allbery +# Copyright (C) 2013-2018 Bastien ROUCARIES +# Copyright (C) 2017-2020 Chris Lamb <lamby@debian.org> +# Copyright (C) 2020 Felix Lechner +# +# 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 https://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::Check::Debian::TrailingWhitespace; + +use v5.20; +use warnings; +use utf8; + +use Const::Fast; + +use Moo; +use namespace::clean; + +with 'Lintian::Check'; + +const my $KEEP_EMPTY_FIELDS => -1; +const my $LAST_ITEM => -1; + +# list of files to check for a trailing whitespace characters +my %PROHIBITED_TRAILS = ( + 'debian/changelog' => qr{\s+$}, + 'debian/control' => qr{\s+$}, + # allow trailing tabs in make + 'debian/rules' => qr{[ ]+$}, +); + +sub visit_patched_files { + my ($self, $item) = @_; + + return + unless exists $PROHIBITED_TRAILS{$item->name}; + + return + unless $item->is_valid_utf8; + + my $contents = $item->decoded_utf8; + my @lines = split(/\n/, $contents, $KEEP_EMPTY_FIELDS); + + my @trailing_whitespace; + my @empty_at_end; + + my $position = 1; + for my $line (@lines) { + + push(@trailing_whitespace, $position) + if $line =~ $PROHIBITED_TRAILS{$item->name}; + + # keeps track of any empty lines at the end + if (length $line) { + @empty_at_end = (); + } else { + push(@empty_at_end, $position); + } + + } continue { + ++$position; + } + + # require a newline at end and remove it + if (scalar @empty_at_end && $empty_at_end[$LAST_ITEM] == scalar @lines){ + pop @empty_at_end; + } else { + $self->pointed_hint('no-newline-at-end', $item->pointer); + } + + push(@trailing_whitespace, @empty_at_end); + + $self->pointed_hint('trailing-whitespace', $item->pointer($_)) + for @trailing_whitespace; + + return; +} + +1; + +# Local Variables: +# indent-tabs-mode: nil +# cperl-indent-level: 4 +# End: +# vim: syntax=perl sw=4 sts=4 sr et |