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# Copyright © 1996 Ian Jackson
# Copyright © 2005 Frank Lichtenheld <frank@lichtenheld.de>
# Copyright © 2009 Raphaël Hertzog <hertzog@debian.org>
# Copyright © 2012-2017 Guillem Jover <guillem@debian.org>
#
# 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 <https://www.gnu.org/licenses/>.
=encoding utf8
=head1 NAME
Dpkg::Changelog::Debian - parse Debian changelogs
=head1 DESCRIPTION
This class represents a Debian changelog file as an array of changelog
entries (L<Dpkg::Changelog::Entry::Debian>).
It implements the generic interface L<Dpkg::Changelog>.
Only methods specific to this implementation are described below,
the rest are inherited.
Dpkg::Changelog::Debian parses Debian changelogs as described in
L<deb-changelog(5)>.
The parser tries to ignore most cruft like # or /* */ style comments,
RCS keywords, Vim modelines, Emacs local variables and stuff from
older changelogs with other formats at the end of the file.
NOTE: most of these are ignored silently currently, there is no
parser error issued for them. This should become configurable in the
future.
=cut
package Dpkg::Changelog::Debian 1.00;
use strict;
use warnings;
use Dpkg::Gettext;
use Dpkg::File;
use Dpkg::Changelog;
use Dpkg::Changelog::Entry::Debian qw(match_header match_trailer);
use parent qw(Dpkg::Changelog);
use constant {
FIRST_HEADING => g_('first heading'),
NEXT_OR_EOF => g_('next heading or end of file'),
START_CHANGES => g_('start of change data'),
CHANGES_OR_TRAILER => g_('more change data or trailer'),
};
my $ancient_delimiter_re = qr{
^
(?: # Ancient GNU style changelog entry with expanded date
(?:
\w+\s+ # Day of week (abbreviated)
\w+\s+ # Month name (abbreviated)
\d{1,2} # Day of month
\Q \E
\d{1,2}:\d{1,2}:\d{1,2}\s+ # Time
[\w\s]* # Timezone
\d{4} # Year
)
\s+
(?:.*) # Maintainer name
\s+
[<\(]
(?:.*) # Maintainer email
[\)>]
| # Old GNU style changelog entry with expanded date
(?:
\w+\s+ # Day of week (abbreviated)
\w+\s+ # Month name (abbreviated)
\d{1,2},?\s* # Day of month
\d{4} # Year
)
\s+
(?:.*) # Maintainer name
\s+
[<\(]
(?:.*) # Maintainer email
[\)>]
| # Ancient changelog header w/o key=value options
(?:\w[-+0-9a-z.]*) # Package name
\Q \E
\(
(?:[^\(\) \t]+) # Package version
\)
\;?
| # Ancient changelog header
(?:[\w.+-]+) # Package name
[- ]
(?:\S+) # Package version
\ Debian
\ (?:\S+) # Package revision
|
Changes\ from\ version\ (?:.*)\ to\ (?:.*):
|
Changes\ for\ [\w.+-]+-[\w.+-]+:?\s*$
|
Old\ Changelog:\s*$
|
(?:\d+:)?
\w[\w.+~-]*:?
\s*$
)
}xi;
=head1 METHODS
=over 4
=item $count = $c->parse($fh, $description)
Read the filehandle and parse a Debian changelog in it, to store the entries
as an array of L<Dpkg::Changelog::Entry::Debian> objects.
Any previous entries in the object are reset before parsing new data.
Returns the number of changelog entries that have been parsed with success.
=cut
sub parse {
my ($self, $fh, $file) = @_;
$file = $self->{reportfile} if exists $self->{reportfile};
$self->reset_parse_errors;
$self->{data} = [];
$self->set_unparsed_tail(undef);
my $expect = FIRST_HEADING;
my $entry = Dpkg::Changelog::Entry::Debian->new();
my @blanklines = ();
# To make version unique, for example for using as id.
my $unknowncounter = 1;
local $_;
while (<$fh>) {
chomp;
if (match_header($_)) {
unless ($expect eq FIRST_HEADING || $expect eq NEXT_OR_EOF) {
$self->parse_error($file, $.,
sprintf(g_('found start of entry where expected %s'),
$expect), "$_");
}
unless ($entry->is_empty) {
push @{$self->{data}}, $entry;
$entry = Dpkg::Changelog::Entry::Debian->new();
last if $self->abort_early();
}
$entry->set_part('header', $_);
foreach my $error ($entry->parse_header()) {
$self->parse_error($file, $., $error, $_);
}
$expect = START_CHANGES;
@blanklines = ();
} elsif (m/^(?:;;\s*)?Local variables:/io) {
# Save any trailing Emacs variables at end of file.
$self->set_unparsed_tail("$_\n" . (file_slurp($fh) // ''));
last;
} elsif (m/^vim:/io) {
# Save any trailing Vim modelines at end of file.
$self->set_unparsed_tail("$_\n" . (file_slurp($fh) // ''));
last;
} elsif (m/^\$\w+:.*\$/o) {
next; # skip stuff that look like a RCS keyword
} elsif (m/^\# /o) {
next; # skip comments, even that's not supported
} elsif (m{^/\*.*\*/}o) {
next; # more comments
} elsif (m/$ancient_delimiter_re/) {
# save entries on old changelog format verbatim
# we assume the rest of the file will be in old format once we
# hit it for the first time
$self->set_unparsed_tail("$_\n" . file_slurp($fh));
} elsif (m/^\S/) {
$self->parse_error($file, $., g_('badly formatted heading line'), "$_");
} elsif (match_trailer($_)) {
unless ($expect eq CHANGES_OR_TRAILER) {
$self->parse_error($file, $.,
sprintf(g_('found trailer where expected %s'), $expect), "$_");
}
$entry->set_part('trailer', $_);
$entry->extend_part('blank_after_changes', [ @blanklines ]);
@blanklines = ();
foreach my $error ($entry->parse_trailer()) {
$self->parse_error($file, $., $error, $_);
}
$expect = NEXT_OR_EOF;
} elsif (m/^ \-\-/) {
$self->parse_error($file, $., g_('badly formatted trailer line'), "$_");
} elsif (m/^\s{2,}(?:\S)/) {
unless ($expect eq START_CHANGES or $expect eq CHANGES_OR_TRAILER) {
$self->parse_error($file, $., sprintf(g_('found change data' .
' where expected %s'), $expect), "$_");
if ($expect eq NEXT_OR_EOF and not $entry->is_empty) {
# lets assume we have missed the actual header line
push @{$self->{data}}, $entry;
$entry = Dpkg::Changelog::Entry::Debian->new();
$entry->set_part('header', 'unknown (unknown' . ($unknowncounter++) . ') unknown; urgency=unknown');
}
}
# Keep raw changes
$entry->extend_part('changes', [ @blanklines, $_ ]);
@blanklines = ();
$expect = CHANGES_OR_TRAILER;
} elsif (!m/\S/) {
if ($expect eq START_CHANGES) {
$entry->extend_part('blank_after_header', $_);
next;
} elsif ($expect eq NEXT_OR_EOF) {
$entry->extend_part('blank_after_trailer', $_);
next;
} elsif ($expect ne CHANGES_OR_TRAILER) {
$self->parse_error($file, $.,
sprintf(g_('found blank line where expected %s'), $expect));
}
push @blanklines, $_;
} else {
$self->parse_error($file, $., g_('unrecognized line'), "$_");
unless ($expect eq START_CHANGES or $expect eq CHANGES_OR_TRAILER) {
# lets assume change data if we expected it
$entry->extend_part('changes', [ @blanklines, $_]);
@blanklines = ();
$expect = CHANGES_OR_TRAILER;
}
}
}
unless ($expect eq NEXT_OR_EOF) {
$self->parse_error($file, $.,
sprintf(g_('found end of file where expected %s'),
$expect));
}
unless ($entry->is_empty) {
push @{$self->{data}}, $entry;
}
return scalar @{$self->{data}};
}
1;
=back
=head1 CHANGES
=head2 Version 1.00 (dpkg 1.15.6)
Mark the module as public.
=head1 SEE ALSO
L<Dpkg::Changelog>.
=cut
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