/usr/share/perl5/Dpkg/Changelog/Parse.pm is in libdpkg-perl 1.17.5ubuntu5.6.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 | # Copyright © 2005, 2007 Frank Lichtenheld <frank@lichtenheld.de>
# Copyright © 2009 Raphaël Hertzog <hertzog@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::Parse - generic changelog parser for dpkg-parsechangelog
=head1 DESCRIPTION
This module provides a single function changelog_parse() which reproduces
all the features of dpkg-parsechangelog.
=head2 FUNCTIONS
=cut
package Dpkg::Changelog::Parse;
use strict;
use warnings;
our $VERSION = '1.00';
use Dpkg ();
use Dpkg::Gettext;
use Dpkg::ErrorHandling;
use Dpkg::Control::Changelog;
use Exporter qw(import);
our @EXPORT = qw(changelog_parse);
=over 4
=item my $fields = changelog_parse(%opt)
This function will parse a changelog. In list context, it return as many
Dpkg::Control object as the parser did output. In scalar context, it will
return only the first one. If the parser didn't return any data, it will
return an empty in list context or undef on scalar context. If the parser
failed, it will die.
The parsing itself is done by an external program (searched in the
following list of directories: $opt{libdir},
F</usr/local/lib/dpkg/parsechangelog>, F</usr/lib/dpkg/parsechangelog>) That
program is named according to the format that it's able to parse. By
default it's either "debian" or the format name lookep up in the 40 last
lines of the changelog itself (extracted with this perl regular expression
"\schangelog-format:\s+([0-9a-z]+)\W"). But it can be overridden
with $opt{changelogformat}. The program expects the content of the
changelog file on its standard input.
The changelog file that is parsed is F<debian/changelog> by default but it
can be overridden with $opt{file}.
All the other keys in %opt are forwarded as parameter to the external
parser. If the key starts with "-", it's passed as is. If not, it's passed
as "--<key>". If the value of the corresponding hash entry is defined, then
it's passed as the parameter that follows.
=cut
sub changelog_parse {
my (%options) = @_;
my @parserpath = ('/usr/local/lib/dpkg/parsechangelog',
"$Dpkg::LIBDIR/parsechangelog",
'/usr/lib/dpkg/parsechangelog');
my $format = 'debian';
my $force = 0;
# Extract and remove options that do not concern the changelog parser
# itself (and that we shouldn't forward)
if (exists $options{libdir}) {
unshift @parserpath, $options{libdir};
delete $options{libdir};
}
if (exists $options{changelogformat}) {
$format = $options{changelogformat};
delete $options{changelogformat};
$force = 1;
}
# Set a default filename
if (not exists $options{file}) {
$options{file} = 'debian/changelog';
}
my $changelogfile = $options{file};
# Extract the format from the changelog file if possible
unless($force or ($changelogfile eq '-')) {
open(my $format_fh, '-|', 'tail', '-n', '40', $changelogfile)
or syserr(_g('cannot create pipe for %s'), 'tail');
while (<$format_fh>) {
$format = $1 if m/\schangelog-format:\s+([0-9a-z]+)\W/;
}
close($format_fh) or subprocerr(_g('tail of %s'), $changelogfile);
}
# Find the right changelog parser
my $parser;
foreach my $dir (@parserpath) {
my $candidate = "$dir/$format";
next if not -e $candidate;
if (-x _) {
$parser = $candidate;
last;
} else {
warning(_g('format parser %s not executable'), $candidate);
}
}
error(_g('changelog format %s is unknown'), $format) if not defined $parser;
# Create the arguments for the changelog parser
my @exec = ($parser, "-l$changelogfile");
foreach (keys %options) {
if (m/^-/) {
# Options passed untouched
push @exec, $_;
} else {
# Non-options are mapped to long options
push @exec, "--$_";
}
push @exec, $options{$_} if defined($options{$_});
}
# Fork and call the parser
my $pid = open(my $parser_fh, '-|');
syserr(_g('cannot fork for %s'), $parser) unless defined $pid;
if (not $pid) {
exec(@exec) or syserr(_g('cannot exec format parser: %s'), $parser);
}
# Get the output into several Dpkg::Control objects
my (@res, $fields);
while (1) {
$fields = Dpkg::Control::Changelog->new();
last unless $fields->parse($parser_fh, _g('output of changelog parser'));
push @res, $fields;
}
close($parser_fh) or subprocerr(_g('changelog parser %s'), $parser);
if (wantarray) {
return @res;
} else {
return $res[0] if (@res);
return;
}
}
=back
=cut
1;
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