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| -rw-r--r-- | scripts/Dpkg/Changelog/Parse.pm | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/scripts/Dpkg/Changelog/Parse.pm b/scripts/Dpkg/Changelog/Parse.pm new file mode 100644 index 0000000..91da43a --- /dev/null +++ b/scripts/Dpkg/Changelog/Parse.pm @@ -0,0 +1,232 @@ +# Copyright © 2005, 2007 Frank Lichtenheld <frank@lichtenheld.de> +# Copyright © 2009 Raphaël Hertzog <hertzog@debian.org> +# Copyright © 2010, 2012-2015 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::Parse - generic changelog parser for dpkg-parsechangelog + +=head1 DESCRIPTION + +This module provides a set of functions which reproduce all the features +of dpkg-parsechangelog. + +=cut + +package Dpkg::Changelog::Parse; + +use strict; +use warnings; + +our $VERSION = '1.03'; +our @EXPORT = qw( + changelog_parse_debian + changelog_parse_plugin + changelog_parse +); + +use Exporter qw(import); +use List::Util qw(none); + +use Dpkg (); +use Dpkg::Gettext; +use Dpkg::ErrorHandling; +use Dpkg::Control::Changelog; + +sub _changelog_detect_format { + my $file = shift; + my $format = 'debian'; + + # Extract the format from the changelog file if possible + if ($file ne '-') { + local $_; + + open my $format_fh, '<', $file + or syserr(g_('cannot open file %s'), $file); + if (-s $format_fh > 4096) { + seek $format_fh, -4096, 2 + or syserr(g_('cannot seek into file %s'), $file); + } + while (<$format_fh>) { + $format = $1 if m/\schangelog-format:\s+([0-9a-z]+)\W/; + } + close $format_fh; + } + + return $format; +} + +=head1 FUNCTIONS + +=over 4 + +=item $fields = changelog_parse_debian(%opt) + +This function is deprecated, use changelog_parse() instead, with the changelog +format set to "debian". + +=cut + +sub changelog_parse_debian { + my (%options) = @_; + + warnings::warnif('deprecated', + 'deprecated function changelog_parse_debian, use changelog_parse instead'); + + # Force the plugin to be debian. + $options{changelogformat} = 'debian'; + + return _changelog_parse(%options); +} + +=item $fields = changelog_parse_plugin(%opt) + +This function is deprecated, use changelog_parse() instead. + +=cut + +sub changelog_parse_plugin { + my (%options) = @_; + + warnings::warnif('deprecated', + 'deprecated function changelog_parse_plugin, use changelog_parse instead'); + + return _changelog_parse(%options); +} + +=item $fields = changelog_parse(%opt) + +This function will parse a changelog. In list context, it returns as many +Dpkg::Control objects as the parser did create. In scalar context, it will +return only the first one. If the parser did not return any data, it will +return an empty list in list context or undef on scalar context. If the +parser failed, it will die. + +The changelog file that is parsed is F<debian/changelog> by default but it +can be overridden with $opt{file}. The default output format is "dpkg" but +it can be overridden with $opt{format}. + +The parsing itself is done by a parser module (searched in the standard +perl library directories. That module is named according to the format that +it is able to parse, with the name capitalized. By default it is either +Dpkg::Changelog::Debian (from the "debian" format) or the format name looked +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}. + +If $opt{compression} is false, the file will be loaded without compression +support, otherwise by default compression support is disabled if the file +is the default. + +All the other keys in %opt are forwarded to the parser module constructor. + +=cut + +sub _changelog_parse { + my (%options) = @_; + + # Setup and sanity checks. + if (exists $options{libdir}) { + warnings::warnif('deprecated', + 'obsolete libdir option, changelog parsers are now perl modules'); + } + + $options{file} //= 'debian/changelog'; + $options{label} //= $options{file}; + $options{changelogformat} //= _changelog_detect_format($options{file}); + $options{format} //= 'dpkg'; + $options{compression} //= $options{file} ne 'debian/changelog'; + + my @range_opts = qw(since until from to offset count reverse all); + $options{all} = 1 if exists $options{all}; + if (none { defined $options{$_} } @range_opts) { + $options{count} = 1; + } + my $range; + foreach my $opt (@range_opts) { + $range->{$opt} = $options{$opt} if exists $options{$opt}; + } + + # Find the right changelog parser. + my $format = ucfirst lc $options{changelogformat}; + my $changes; + eval qq{ + pop \@INC if \$INC[-1] eq '.'; + require Dpkg::Changelog::$format; + \$changes = Dpkg::Changelog::$format->new(); + }; + error(g_('changelog format %s is unknown: %s'), $format, $@) if $@; + $changes->set_options(reportfile => $options{label}, range => $range); + + # Load and parse the changelog. + $changes->load($options{file}, compression => $options{compression}) + or error(g_('fatal error occurred while parsing %s'), $options{file}); + + # Get the output into several Dpkg::Control objects. + my @res; + if ($options{format} eq 'dpkg') { + push @res, $changes->format_range('dpkg', $range); + } elsif ($options{format} eq 'rfc822') { + push @res, $changes->format_range('rfc822', $range); + } else { + error(g_('unknown output format %s'), $options{format}); + } + + if (wantarray) { + return @res; + } else { + return $res[0] if @res; + return; + } +} + +sub changelog_parse { + my (%options) = @_; + + if (exists $options{forceplugin}) { + warnings::warnif('deprecated', 'obsolete forceplugin option'); + } + + return _changelog_parse(%options); +} + +=back + +=head1 CHANGES + +=head2 Version 1.03 (dpkg 1.19.0) + +New option: 'compression' in changelog_parse(). + +=head2 Version 1.02 (dpkg 1.18.8) + +Deprecated functions: changelog_parse_debian(), changelog_parse_plugin(). + +Obsolete options: $forceplugin, $libdir. + +=head2 Version 1.01 (dpkg 1.18.2) + +New functions: changelog_parse_debian(), changelog_parse_plugin(). + +=head2 Version 1.00 (dpkg 1.15.6) + +Mark the module as public. + +=cut + +1; |