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# -*- perl -*- Lintian::Processable::Overrides
#
# Copyright (C) 2019-2021 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::Overrides;
use v5.20;
use warnings;
use utf8;
use Const::Fast;
use Lintian::Override;
const my $EMPTY => q{};
const my $SPACE => q{ };
use Moo::Role;
use namespace::clean;
=head1 NAME
Lintian::Processable::Overrides - access to override data
=head1 SYNOPSIS
use Lintian::Processable;
=head1 DESCRIPTION
Lintian::Processable::Overrides provides an interface to overrides.
=head1 INSTANCE METHODS
=over 4
=item override_errors
=cut
has override_errors => (is => 'rw', default => sub { [] });
=item parse_overrides
=cut
sub parse_overrides {
my ($self, $contents) = @_;
$contents //= $EMPTY;
my @declared_overrides;
my $justification = $EMPTY;
my $previous = Lintian::Override->new;
my @lines = split(/\n/, $contents);
my $position = 1;
for my $line (@lines) {
my $remaining = $line;
# trim both ends
$remaining =~ s/^\s+|\s+$//g;
if ($remaining eq $EMPTY) {
# Throw away comments, as they are not attached to a tag
# also throw away the option of "carrying over" the last
# comment
$justification = $EMPTY;
$previous = Lintian::Override->new;
next;
}
if ($remaining =~ s{^ [#] \s* }{}x) {
if (length $remaining) {
$justification .= $SPACE
if length $justification;
$justification .= $remaining;
}
next;
}
# reduce white space
$remaining =~ s/\s+/ /g;
# [[pkg-name] [arch-list] [pkg-type]:] <tag> [context]
my $require_colon = 0;
my @architectures;
# strip package name, if present; require name
# parsing overrides is ambiguous (see #699628)
my $package = $self->name;
if ($remaining =~ s/^\Q$package\E(?=\s|:)//) {
# both spaces or colon were unmatched lookhead
$remaining =~ s/^\s+//;
$require_colon = 1;
}
# remove architecture list
if ($remaining =~ s{^ \[ ([^\]]*) \] (?=\s|:)}{}x) {
my $list = $1;
@architectures = split($SPACE, $list);
# both spaces or colon were unmatched lookhead
$remaining =~ s/^\s+//;
$require_colon = 1;
}
# remove package type
my $type = $self->type;
if ($remaining =~ s/^\Q$type\E(?=\s|:)//) {
# both spaces or colon were unmatched lookhead
$remaining =~ s/^\s+//;
$require_colon = 1;
}
my $pointer = $self->override_file->pointer($position);
# require and remove colon when any package details are present
if ($require_colon && $remaining !~ s/^\s*:\s*//) {
my %error;
$error{message} = 'Expected a colon';
$error{pointer} = $pointer;
push(@{$self->override_errors}, \%error);
next;
}
my $hint_like = $remaining;
my ($tag_name, $pattern) = split($SPACE, $hint_like, 2);
if (!length $tag_name) {
my %error;
$error{message} = "Cannot parse line: $line";
$error{pointer} = $pointer;
push(@{$self->override_errors}, \%error);
next;
}
$pattern //= $EMPTY;
# There are no new comments, no "empty line" in between and
# this tag is the same as the last, so we "carry over" the
# comment from the previous override (if any).
$justification = $previous->justification
if !length $justification
&& $tag_name eq $previous->tag_name;
my $current = Lintian::Override->new;
$current->tag_name($tag_name);
$current->architectures(\@architectures);
$current->pattern($pattern);
$current->position($position);
# combine successive white space
$justification =~ s{ \s+ }{ }gx;
$current->justification($justification);
$justification = $EMPTY;
push(@declared_overrides, $current);
$previous = $current;
} continue {
$position++;
}
return \@declared_overrides;
}
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
|
