1 files changed, 145 insertions, 0 deletions
diff --git a/lib/Lintian/Processable/Changes.pm b/lib/Lintian/Processable/Changes.pm
new file mode 100644
index 0000000..65eb8e4
--- /dev/null
+++ b/lib/Lintian/Processable/Changes.pm
@@ -0,0 +1,145 @@
+# 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, 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::Processable::Changes;
+
+use v5.20;
+use warnings;
+use utf8;
+
+use Carp qw(croak);
+use Path::Tiny;
+use Unicode::UTF8 qw(valid_utf8 decode_utf8 encode_utf8);
+
+use Lintian::Deb822;
+
+use Moo;
+use namespace::clean;
+
+with
+  'Lintian::Processable',
+  'Lintian::Processable::Fields::Files',
+  'Lintian::Processable::Changes::Overrides';
+
+=for Pod::Coverage BUILDARGS
+
+=head1 NAME
+
+Lintian::Processable::Changes -- A changes file Lintian can process
+
+=head1 SYNOPSIS
+
+ use Lintian::Processable::Changes;
+
+ my $processable = Lintian::Processable::Changes->new;
+ $processable->init_from_file('path');
+
+=head1 DESCRIPTION
+
+This class represents a 'changes' file that Lintian can process. Objects
+of this kind are often part of a L<Lintian::Group>, which
+represents all the files in a changes or buildinfo file.
+
+=head1 INSTANCE METHODS
+
+=over 4
+
+=item init_from_file (PATH)
+
+Initializes a new object from PATH.
+
+=cut
+
+sub init_from_file {
+    my ($self, $file) = @_;
+
+    croak encode_utf8("File $file does not exist")
+      unless -e $file;
+
+    $self->path($file);
+    $self->type('changes');
+
+    # dpkg will include news items in national encoding
+    my $bytes = path($self->path)->slurp;
+
+    my $contents;
+    if (valid_utf8($bytes)) {
+        $contents = decode_utf8($bytes);
+    } else {
+        # try to proceed with nat'l encoding; stopping here breaks tests
+        $contents = $bytes;
+    }
+
+    my $primary = Lintian::Deb822->new;
+    my @sections = $primary->parse_string($contents)
+      or croak encode_utf8(
+        $self->path. ' is not a valid '. $self->type . ' file');
+
+    $self->fields($sections[0]);
+
+    my $name = $self->fields->value('Source');
+    my $version = $self->fields->value('Version');
+    my $architecture = $self->fields->value('Architecture');
+
+    unless (length $name) {
+        $name = $self->guess_name($self->path);
+        croak encode_utf8('Cannot determine the name from ' . $self->path)
+          unless length $name;
+    }
+
+    my $source_name = $name;
+    my $source_version = $version;
+
+    $self->name($name);
+    $self->version($version);
+    $self->architecture($architecture);
+    $self->source_name($source_name);
+    $self->source_version($source_version);
+
+    # make sure none of these fields can cause traversal
+    $self->tainted(1)
+      if $self->name ne $name
+      || $self->version ne $version
+      || $self->architecture ne $architecture
+      || $self->source_name ne $source_name
+      || $self->source_version ne $source_version;
+
+    return;
+}
+
+=back
+
+=head1 AUTHOR
+
+Originally written by Felix Lechner <felix.lechner@lease-up.com> for Lintian.
+
+=head1 SEE ALSO
+
+lintian(1)
+
+L<Lintian::Processable>
+
+=cut
+
+1;
+
+# Local Variables:
+# indent-tabs-mode: nil
+# cperl-indent-level: 4
+# End:
+# vim: syntax=perl sw=4 sts=4 sr et