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# -*- perl -*- Lintian::Processable::Diffstat -- access to collected diffstat data
#
# Copyright (C) 1998 Richard Braakman
# Copyright (C) 2019-2020 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, see <http://www.gnu.org/licenses/>.
package Lintian::Processable::Diffstat;
use v5.20;
use warnings;
use utf8;
use Const::Fast;
use IPC::Run3;
use Path::Tiny;
use Unicode::UTF8 qw(encode_utf8 decode_utf8);
use Moo::Role;
use namespace::clean;
const my $COLON => q{:};
const my $UNDERSCORE => q{_};
const my $NEWLINE => qq{\n};
const my $OPEN_PIPE => q{-|};
const my $WAIT_STATUS_SHIFT => 8;
=head1 NAME
Lintian::Processable::Diffstat - access to collected diffstat data
=head1 SYNOPSIS
use Lintian::Processable;
=head1 DESCRIPTION
Lintian::Processable::Diffstat provides an interface to diffstat data.
=head1 INSTANCE METHODS
=over 4
=item diffstat
Returns the path to diffstat output run on the Debian packaging diff
(a.k.a. the "diff.gz") for 1.0 non-native packages. For source
packages without a "diff.gz" component, this returns the path to an
empty file (this may be a device like /dev/null).
=cut
has diffstat => (
is => 'rw',
lazy => 1,
default => sub {
my ($self) = @_;
my $noepoch = $self->fields->value('Version');
# strip epoch
$noepoch =~ s/^\d://;
# look for a format 1.0 diff.gz near the input file
my $diffname = $self->name . $UNDERSCORE . $noepoch . '.diff.gz';
return {}
unless exists $self->files->{$diffname};
my $diffpath = path($self->path)->parent->child($diffname)->stringify;
return {}
unless -e $diffpath;
my @gunzip_command = ('gunzip', '--stdout', $diffpath);
my $gunzip_pid = open(my $from_gunzip, $OPEN_PIPE, @gunzip_command)
or die encode_utf8("Cannot run @gunzip_command: $!");
my $stdout;
my $stderr;
my @diffstat_command = qw(diffstat -p1);
run3(\@diffstat_command, $from_gunzip, \$stdout, \$stderr);
my $status = ($? >> $WAIT_STATUS_SHIFT);
$stdout = decode_utf8($stdout)
if length $stdout;
$stderr = decode_utf8($stderr)
if length $stderr;
if ($status) {
my $message= "Non-zero status $status from @diffstat_command";
$message .= $COLON . $NEWLINE . $stderr
if length $stderr;
die encode_utf8($message);
}
close $from_gunzip
or
warn encode_utf8("close failed for handle from @gunzip_command: $!");
waitpid($gunzip_pid, 0);
# remove summary in last line
chomp $stdout;
$stdout =~ s/.*\Z//;
my %diffstat;
my @lines = split(/\n/, $stdout);
for my $line (@lines) {
next
unless $line =~ s/\|\s*([^|]*)\s*$//;
my $stats = $1;
my $file = $line;
# trim both ends
$file =~ s/^\s+|\s+$//g;
die encode_utf8("syntax error in diffstat file: $line")
unless length $file;
$diffstat{$file} = $stats;
}
return \%diffstat;
}
);
1;
=back
=head1 AUTHOR
Originally written by Felix Lechner <felix.lechner@lease-up.com> for
Lintian.
=head1 SEE ALSO
lintian(1)
=cut
# Local Variables:
# indent-tabs-mode: nil
# cperl-indent-level: 4
# End:
# vim: syntax=perl sw=4 sts=4 sr et
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