/usr/share/perl5/Config/Model/Backend/Dpkg/Patch.pm is in libconfig-model-dpkg-perl 2.090.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 | package Config::Model::Backend::Dpkg::Patch;
use strict;
use warnings;
use Mouse;
extends 'Config::Model::Backend::Any';
with 'Config::Model::Backend::DpkgSyntax';
with 'Config::Model::Backend::DpkgStoreRole';
use 5.20.1;
use feature qw/postderef signatures/;
no warnings qw/experimental::postderef experimental::signatures/;
use Carp;
use Config::Model::Exception;
use Log::Log4perl qw(get_logger :levels);
use IO::File;
my $logger = get_logger("Backend::Dpkg::Patch");
sub suffix { return ''; }
sub skip_open { 1;}
sub read {
my $self = shift;
my %args = @_;
# args is:
# object => $obj, # Config::Model::Node object
# root => './my_test', # fake root directory, userd for tests
# config_dir => /etc/foo', # absolute path
# file => 'foo.conf', # file name
# file_path => './my_test/etc/foo/foo.conf'
# io_handle => $io # IO::File object
# check => yes|no|skip
# io_handle is not defined as no file is specified in model
my $patch_dir = $args{root} . $args{config_dir};
my $check = $args{check};
my $node = $args{object};
my $file_path = $args{file_path};
my $patch_name = $node->index_value || $args{config_file};
my $patch_file
= ($file_path and -e $file_path) ? $file_path
: -e "$patch_dir$file_path" ? "$patch_dir$file_path"
: "$patch_dir$patch_name" ;
$self->{patch_file} = $patch_file;
$logger->info("Parsing patch $patch_file");
my $patch_io = IO::File->new($patch_file)
|| Config::Model::Exception::Syntax->throw(
message => "cannot read patch $patch_file" );
$patch_io->binmode(':utf8');
my ( $header, $diff ) = ( [],[] );
my $target = $header;
foreach my $l ( $patch_io->getlines ) {
if ( $l =~ /^---/ ) {
# beginning of quilt style patch
$target = $diff;
}
elsif ( $l =~ /^===/ ) {
# beginning of git diff style patch
push @$diff, pop @$header if $target eq $header; # get back the Index: line
$target = $diff;
}
push @$target, $l;
}
chomp @$header;
my $c = [] ;
$logger->trace("header: @$header") ;
my %stuff ;
my $store_stuff = sub {
my ($l,$nb) = @_;
die "undef line nb" unless defined $nb;
$stuff{$nb} = $l ;
} ;
if (@$header) {
$c = eval { $self->parse_dpkg_lines( $file_path, $header, $check, 0, $store_stuff ); };
my $e = $@;
if ( ref($e) and $e->isa('Config::Model::Exception::Syntax') ) {
$e->parsed_file( $patch_file );
$e->rethrow;
}
elsif (ref($e)) {
$e->rethrow;
}
elsif ($e) {
die $e;
}
Config::Model::Exception::Syntax->throw(
message => "More than 2 sections in $patch_name header",
parsed_file => $patch_file,
)
if @$c > 4; # $c contains [ line_nb, section_ref ]
}
my $description_holder;
my @description_text ;
while (@$c) {
my ( $section_line, $section ) = splice @$c, 0, 2;
foreach ( my $i = 0 ; $i < $#$section ; $i += 2 ) {
my $key = $section->[$i];
my $v_ref = $section->[ $i + 1 ];
if ( my $found = $node->find_element( $key, case => 'any' ) ) {
my $elt = $found ;
my $to_store = $v_ref;
if ($found =~ /^Subject|Description$/) {
$description_holder = $found;
$elt = 'Synopsis';
$to_store = [ shift $v_ref->@* ];
push @description_text, $v_ref->@*;
}
my $elt_obj = $node->fetch_element($elt);
if ($node->element_type($elt) eq 'list') {
$self->store_section_list_element ( $logger, $elt_obj, $check, $to_store);
}
else {
$self->store_section_leaf_element ( $logger, $elt_obj, $check, $to_store);
}
}
else {
$stuff{$section_line} = "$key: ".join("\n", map {$_->[0]} $v_ref->@*)."\n";
}
}
}
my $k = 0;
push @description_text,''; # force a newline between description and salvaged lines
# add salvaged lines in the order they were found
push @description_text, map { [$stuff{$_}, $_, ''] } sort { $a <=> $b ;} keys %stuff ;
$description_holder //= 'Description';
my $elt_obj = $node->fetch_element($description_holder);
$self->store_section_leaf_element ( $logger, $elt_obj, $check, \@description_text);
# at last, save the "meat" of the patch
$node->fetch_element('diff')->store(join('',@$diff));
return 1;
}
sub write {
my $self = shift;
my %args = @_;
# args is:
# object => $obj, # Config::Model::Node object
# root => './my_test', # fake root directory, userd for tests
# config_dir => /etc/foo', # absolute path
# file => 'foo.conf', # file name
# file_path => './my_test/etc/foo/foo.conf'
# io_handle => $io # IO::File object
# io_handle is not defined as no file is specified in model
my $check = $args{check};
my $node = $args{object};
my $patch_file = $self->{patch_file} ;
$logger->info("Writing patch $patch_file");
my $io = IO::File->new($patch_file,'w')
|| Config::Model::Exception::Syntax->throw(
message => "cannot write patch $patch_file" );
$io->binmode(":utf8");
# first: write Description or Subject (where the subuject body is written
# outside the structured part -- as required by dep-3)
my $synopsis = $node->fetch_element_value('Synopsis') || "";
my $description_body = $node->fetch_element_value('Description') ;
my $subject_body = $node->fetch_element_value('Subject') ;
if ($description_body and $subject_body) {
die "Write error: cannot have both Subject body and description body";
}
elsif ($description_body) {
my $to_write = $synopsis . "\n" . $description_body ;
$io->print("Description: ");
$self->write_dpkg_text($io, $to_write) ;
}
elsif ($subject_body) {
# DEP-3: When Subject is used, it is expected that the
# long description is outside of the structured
# fields.
$io->print("Subject: ");
$self->write_dpkg_text($io, $synopsis) ;
}
else {
# no description body, write only synopsis
$io->print("Description: ");
$self->write_dpkg_text($io, $synopsis) ;
}
# second: write all headers
foreach my $elt ( $node -> get_element_name ) {
my $elt_obj = $node->fetch_element($elt) ;
my $type = $node->element_type($elt) ;
my @v = $type eq 'list' ? $elt_obj->fetch_all_values
: $type eq 'leaf' ? ($elt_obj->fetch)
: ();
foreach my $v (@v) {
# say "write $elt -> $v" ;
next unless defined $v and $v;
next if grep {$elt eq $_} qw/Description Subject Synopsis diff/;
$io->print("$elt: ");
$self->write_dpkg_text($io,$v) ;
}
}
# third: write subect body
if ($subject_body) {
$io->print($subject_body."\n");
}
$io->print($node->fetch_element_value('diff')) ;
return 1;
}
1;
__END__
=head1 NAME
Config::Model::Backend::Dpkg::Patch - Read and write Debian Dpkg Patch information
=head1 SYNOPSIS
No synopsis. This class is dedicated to configuration class C<Dpkg::Patch>
=head1 DESCRIPTION
This module is used directly by L<Config::Model> to read or write the
content of Debian C<Patch> file.
All C<Patch> files keyword are read in a case-insensitive manner.
=head1 CONSTRUCTOR
=head2 new ( node => $node_obj, name => 'Dpkg::Patch' ) ;
Inherited from L<Config::Model::Backend::Any>. The constructor will be
called by L<Config::Model::AutoRead>.
=head2 read ( io_handle => ... )
Of all parameters passed to this read call-back, only C<io_handle> is
used. This parameter must be L<IO::File> object already opened for
read.
It can also be undef. In this case, C<read()> will return 0.
When a file is read, C<read()> will return 1.
=head2 write ( io_handle => ... )
Of all parameters passed to this write call-back, only C<io_handle> is
used. This parameter must be L<IO::File> object already opened for
write.
C<write()> will return 1.
=head1 AUTHOR
Dominique Dumont, (ddumont at cpan dot org)
=head1 SEE ALSO
L<Config::Model>,
L<Config::Model::AutoRead>,
L<Config::Model::Backend::Any>,
=cut
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