mdw@git.distorted.org.uk Git - dpkg/blob - scripts/dpkg-gencontrol.pl

   1 #!/usr/bin/perl
   2 #
   3 # dpkg-gencontrol
   4 #
   5 # Copyright © 1996 Ian Jackson
   6 # Copyright © 2000,2002 Wichert Akkerman
   7 # Copyright © 2006-2015 Guillem Jover <guillem@debian.org>
   8 #
   9 # This program is free software; you can redistribute it and/or modify
  10 # it under the terms of the GNU General Public License as published by
  11 # the Free Software Foundation; either version 2 of the License, or
  12 # (at your option) any later version.
  13 #
  14 # This program is distributed in the hope that it will be useful,
  15 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 # GNU General Public License for more details.
  18 #
  19 # You should have received a copy of the GNU General Public License
  20 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
  21
  22 use strict;
  23 use warnings;
  24
  25 use POSIX qw(:errno_h :fcntl_h);
  26 use File::Find;
  27
  28 use Dpkg ();
  29 use Dpkg::Gettext;
  30 use Dpkg::ErrorHandling;
  31 use Dpkg::Util qw(:list);
  32 use Dpkg::File;
  33 use Dpkg::Arch qw(get_host_arch debarch_eq debarch_is debarch_list_parse);
  34 use Dpkg::Package;
  35 use Dpkg::BuildProfiles qw(get_build_profiles);
  36 use Dpkg::Deps;
  37 use Dpkg::Control;
  38 use Dpkg::Control::Info;
  39 use Dpkg::Control::Fields;
  40 use Dpkg::Substvars;
  41 use Dpkg::Vars;
  42 use Dpkg::Changelog::Parse;
  43 use Dpkg::Dist::Files;
  44
  45 textdomain('dpkg-dev');
  46
  47
  48 my $controlfile = 'debian/control';
  49 my $changelogfile = 'debian/changelog';
  50 my $changelogformat;
  51 my $fileslistfile = 'debian/files';
  52 my $packagebuilddir = 'debian/tmp';
  53 my $outputfile;
  54
  55 my $sourceversion;
  56 my $binaryversion;
  57 my $forceversion;
  58 my $forcefilename;
  59 my $stdout;
  60 my %remove;
  61 my %override;
  62 my $oppackage;
  63 my $substvars = Dpkg::Substvars->new();
  64 my $substvars_loaded = 0;
  65
  66
  67 sub version {
  68     printf g_("Debian %s version %s.\n"), $Dpkg::PROGNAME, $Dpkg::PROGVERSION;
  69
  70     printf g_('
  71 This is free software; see the GNU General Public License version 2 or
  72 later for copying conditions. There is NO warranty.
  73 ');
  74 }
  75
  76 sub usage {
  77     printf g_(
  78 'Usage: %s [<option>...]')
  79     . "\n\n" . g_(
  80 'Options:
  81   -p<package>              print control file for package.
  82   -c<control-file>         get control info from this file.
  83   -l<changelog-file>       get per-version info from this file.
  84   -F<changelog-format>     force changelog format.
  85   -v<force-version>        set version of binary package.
  86   -f<files-list-file>      write files here instead of debian/files.
  87   -P<package-build-dir>    temporary build directory instead of debian/tmp.
  88   -n<filename>             assume the package filename will be <filename>.
  89   -O[<file>]               write to stdout (or <file>), not .../DEBIAN/control.
  90   -is, -ip, -isp, -ips     deprecated, ignored for compatibility.
  91   -D<field>=<value>        override or add a field and value.
  92   -U<field>                remove a field.
  93   -V<name>=<value>         set a substitution variable.
  94   -T<substvars-file>       read variables here, not debian/substvars.
  95   -?, --help               show this help message.
  96       --version            show the version.
  97 '), $Dpkg::PROGNAME;
  98 }
  99
 100 while (@ARGV) {
 101     $_=shift(@ARGV);
 102     if (m/^-p/p) {
 103         $oppackage = ${^POSTMATCH};
 104         my $err = pkg_name_is_illegal($oppackage);
 105         error(g_("illegal package name '%s': %s"), $oppackage, $err) if $err;
 106     } elsif (m/^-c/p) {
 107         $controlfile = ${^POSTMATCH};
 108     } elsif (m/^-l/p) {
 109         $changelogfile = ${^POSTMATCH};
 110     } elsif (m/^-P/p) {
 111         $packagebuilddir = ${^POSTMATCH};
 112     } elsif (m/^-f/p) {
 113         $fileslistfile = ${^POSTMATCH};
 114     } elsif (m/^-v(.+)$/) {
 115         $forceversion= $1;
 116     } elsif (m/^-O$/) {
 117         $stdout= 1;
 118     } elsif (m/^-O(.+)$/) {
 119         $outputfile = $1;
 120     } elsif (m/^-i([sp][sp]?)$/) {
 121         warning(g_('-i%s is deprecated; it is without effect'), $1);
 122     } elsif (m/^-F([0-9a-z]+)$/) {
 123         $changelogformat=$1;
 124     } elsif (m/^-D([^\=:]+)[=:]/p) {
 125         $override{$1} = ${^POSTMATCH};
 126     } elsif (m/^-U([^\=:]+)$/) {
 127         $remove{$1}= 1;
 128     } elsif (m/^-V(\w[-:0-9A-Za-z]*)[=:]/p) {
 129         $substvars->set_as_used($1, ${^POSTMATCH});
 130     } elsif (m/^-T(.*)$/) {
 131         $substvars->load($1) if -e $1;
 132         $substvars_loaded = 1;
 133     } elsif (m/^-n/p) {
 134         $forcefilename = ${^POSTMATCH};
 135     } elsif (m/^-(?:\?|-help)$/) {
 136         usage();
 137         exit(0);
 138     } elsif (m/^--version$/) {
 139         version();
 140         exit(0);
 141     } else {
 142         usageerr(g_("unknown option '%s'"), $_);
 143     }
 144 }
 145
 146 umask 0022; # ensure sane default permissions for created files
 147 my %options = (file => $changelogfile);
 148 $options{changelogformat} = $changelogformat if $changelogformat;
 149 my $changelog = changelog_parse(%options);
 150 if ($changelog->{'Binary-Only'}) {
 151     $options{count} = 1;
 152     $options{offset} = 1;
 153     my $prev_changelog = changelog_parse(%options);
 154     $sourceversion = $prev_changelog->{'Version'};
 155 } else {
 156     $sourceversion = $changelog->{'Version'};
 157 }
 158
 159 if (defined $forceversion) {
 160     $binaryversion = $forceversion;
 161 } else {
 162     $binaryversion = $changelog->{'Version'};
 163 }
 164
 165 $substvars->set_version_substvars($sourceversion, $binaryversion);
 166 $substvars->set_arch_substvars();
 167 $substvars->load('debian/substvars') if -e 'debian/substvars' and not $substvars_loaded;
 168 my $control = Dpkg::Control::Info->new($controlfile);
 169 my $fields = Dpkg::Control->new(type => CTRL_PKG_DEB);
 170
 171 # Old-style bin-nmus change the source version submitted to
 172 # set_version_substvars()
 173 $sourceversion = $substvars->get('source:Version');
 174
 175 my $pkg;
 176
 177 if (defined($oppackage)) {
 178     $pkg = $control->get_pkg_by_name($oppackage);
 179     if (not defined $pkg) {
 180         error(g_('package %s not in control info'), $oppackage)
 181     }
 182 } else {
 183     my @packages = map { $_->{'Package'} } $control->get_packages();
 184     if (@packages == 0) {
 185         error(g_('no package stanza found in control info'));
 186     } elsif (@packages > 1) {
 187         error(g_('must specify package since control info has many (%s)'),
 188               "@packages");
 189     }
 190     $pkg = $control->get_pkg_by_idx(1);
 191 }
 192 $substvars->set_msg_prefix(sprintf(g_('package %s: '), $pkg->{Package}));
 193
 194 # Scan source package
 195 my $src_fields = $control->get_source();
 196 foreach (keys %{$src_fields}) {
 197     if (m/^Source$/) {
 198         set_source_package($src_fields->{$_});
 199     } else {
 200         field_transfer_single($src_fields, $fields);
 201     }
 202 }
 203 $substvars->set_field_substvars($src_fields, 'S');
 204
 205 # Scan binary package
 206 foreach (keys %{$pkg}) {
 207     my $v = $pkg->{$_};
 208     if (field_get_dep_type($_)) {
 209         # Delay the parsing until later
 210     } elsif (m/^Architecture$/) {
 211         my $host_arch = get_host_arch();
 212
 213         if (debarch_eq('all', $v)) {
 214             $fields->{$_} = $v;
 215         } else {
 216             my @archlist = debarch_list_parse($v);
 217
 218             if (none { debarch_is($host_arch, $_) } @archlist) {
 219                 error(g_("current host architecture '%s' does not " .
 220                          "appear in package's architecture list (%s)"),
 221                       $host_arch, "@archlist");
 222             }
 223             $fields->{$_} = $host_arch;
 224         }
 225     } else {
 226         field_transfer_single($pkg, $fields);
 227     }
 228 }
 229
 230 # Scan fields of dpkg-parsechangelog
 231 foreach (keys %{$changelog}) {
 232     my $v = $changelog->{$_};
 233
 234     if (m/^Source$/) {
 235         set_source_package($v);
 236     } elsif (m/^Version$/) {
 237         # Already handled previously.
 238     } elsif (m/^Maintainer$/) {
 239         # That field must not be copied from changelog even if it's
 240         # allowed in the binary package control information
 241     } else {
 242         field_transfer_single($changelog, $fields);
 243     }
 244 }
 245
 246 $fields->{'Version'} = $binaryversion;
 247
 248 # Process dependency fields in a second pass, now that substvars have been
 249 # initialized.
 250
 251 my $facts = Dpkg::Deps::KnownFacts->new();
 252 $facts->add_installed_package($fields->{'Package'}, $fields->{'Version'},
 253                               $fields->{'Architecture'}, $fields->{'Multi-Arch'});
 254 if (exists $pkg->{'Provides'}) {
 255     my $provides = deps_parse($substvars->substvars($pkg->{'Provides'}, no_warn => 1),
 256                               reduce_restrictions => 1, union => 1);
 257     if (defined $provides) {
 258         foreach my $subdep ($provides->get_deps()) {
 259             if ($subdep->isa('Dpkg::Deps::Simple')) {
 260                 $facts->add_provided_package($subdep->{package},
 261                         $subdep->{relation}, $subdep->{version},
 262                         $fields->{'Package'});
 263             }
 264         }
 265     }
 266 }
 267
 268 my (@seen_deps);
 269 foreach my $field (field_list_pkg_dep()) {
 270     # Arch: all can't be simplified as the host architecture is not known
 271     my $reduce_arch = debarch_eq('all', $pkg->{Architecture} || 'all') ? 0 : 1;
 272     if (exists $pkg->{$field}) {
 273         my $dep;
 274         my $field_value = $substvars->substvars($pkg->{$field},
 275             msg_prefix => sprintf(g_('%s field of package %s: '), $field, $pkg->{Package}));
 276         if (field_get_dep_type($field) eq 'normal') {
 277             $dep = deps_parse($field_value, use_arch => 1,
 278                               reduce_arch => $reduce_arch,
 279                               reduce_profiles => 1);
 280             error(g_('error occurred while parsing %s field: %s'), $field,
 281                   $field_value) unless defined $dep;
 282             $dep->simplify_deps($facts, @seen_deps);
 283             # Remember normal deps to simplify even further weaker deps
 284             push @seen_deps, $dep;
 285         } else {
 286             $dep = deps_parse($field_value, use_arch => 1,
 287                               reduce_arch => $reduce_arch,
 288                               reduce_profiles => 1, union => 1);
 289             error(g_('error occurred while parsing %s field: %s'), $field,
 290                   $field_value) unless defined $dep;
 291             $dep->simplify_deps($facts);
 292             $dep->sort();
 293         }
 294         error(g_('the %s field contains an arch-specific dependency but the ' .
 295                  'package is architecture all'), $field)
 296             if $dep->has_arch_restriction();
 297         $fields->{$field} = $dep->output();
 298         delete $fields->{$field} unless $fields->{$field}; # Delete empty field
 299     }
 300 }
 301
 302 for my $f (qw(Package Version Architecture)) {
 303     error(g_('missing information for output field %s'), $f)
 304         unless defined $fields->{$f};
 305 }
 306 for my $f (qw(Maintainer Description)) {
 307     warning(g_('missing information for output field %s'), $f)
 308         unless defined $fields->{$f};
 309 }
 310
 311 my $pkg_type = $pkg->{'Package-Type'} ||
 312                $pkg->get_custom_field('Package-Type') || 'deb';
 313
 314 if ($pkg_type eq 'udeb') {
 315     delete $fields->{'Package-Type'};
 316     delete $fields->{'Homepage'};
 317 } else {
 318     for my $f (qw(Subarchitecture Kernel-Version Installer-Menu-Item)) {
 319         warning(g_('%s package with udeb specific field %s'), $pkg_type, $f)
 320             if defined($fields->{$f});
 321     }
 322 }
 323
 324 my $sourcepackage = get_source_package();
 325 my $binarypackage = $override{'Package'} // $fields->{'Package'};
 326 my $verdiff = $binaryversion ne $sourceversion;
 327 if ($binarypackage ne $sourcepackage || $verdiff) {
 328     $fields->{'Source'} = $sourcepackage;
 329     $fields->{'Source'} .= ' (' . $sourceversion . ')' if $verdiff;
 330 }
 331
 332 if (!defined($substvars->get('Installed-Size'))) {
 333     my $installed_size = 0;
 334     my $scan_installed_size = sub {
 335         lstat or syserr(g_('cannot stat %s'), $File::Find::name);
 336
 337         if (-f _ or -l _) {
 338             # For filesystem objects with actual content accumulate the size
 339             # in 1 KiB units.
 340             $installed_size += POSIX::ceil((-s _) / 1024);
 341         } else {
 342             # For other filesystem objects assume a minimum 1 KiB baseline,
 343             # as directories are shared resources between packages, and other
 344             # object types are mainly metadata-only, supposedly consuming
 345             # at most an inode.
 346             $installed_size += 1;
 347         }
 348     };
 349     find($scan_installed_size, $packagebuilddir);
 350
 351     $substvars->set_as_auto('Installed-Size', $installed_size);
 352 }
 353 if (defined($substvars->get('Extra-Size'))) {
 354     my $size = $substvars->get('Extra-Size') + $substvars->get('Installed-Size');
 355     $substvars->set_as_auto('Installed-Size', $size);
 356 }
 357 if (defined($substvars->get('Installed-Size'))) {
 358     $fields->{'Installed-Size'} = $substvars->get('Installed-Size');
 359 }
 360
 361 for my $f (keys %override) {
 362     $fields->{$f} = $override{$f};
 363 }
 364 for my $f (keys %remove) {
 365     delete $fields->{$f};
 366 }
 367
 368 $fields->apply_substvars($substvars);
 369
 370 if ($stdout) {
 371     $fields->output(\*STDOUT);
 372 } else {
 373     $outputfile //= "$packagebuilddir/DEBIAN/control";
 374
 375     my $sversion = $fields->{'Version'};
 376     $sversion =~ s/^\d+://;
 377     $forcefilename //= sprintf('%s_%s_%s.%s', $fields->{'Package'}, $sversion,
 378                                $fields->{'Architecture'}, $pkg_type);
 379     my $section = $fields->{'Section'} || '-';
 380     my $priority = $fields->{'Priority'} || '-';
 381
 382     # Obtain a lock on debian/control to avoid simultaneous updates
 383     # of debian/files when parallel building is in use
 384     my $lockfh;
 385     my $lockfile = 'debian/control';
 386     $lockfile = $controlfile if not -e $lockfile;
 387
 388     sysopen $lockfh, $lockfile, O_WRONLY
 389         or syserr(g_('cannot write %s'), $lockfile);
 390     file_lock($lockfh, $lockfile);
 391
 392     my $dist = Dpkg::Dist::Files->new();
 393     $dist->load($fileslistfile) if -e $fileslistfile;
 394
 395     foreach my $file ($dist->get_files()) {
 396         if (defined $file->{package} &&
 397             ($file->{package} eq $fields->{'Package'}) &&
 398             ($file->{package_type} eq $pkg_type) &&
 399             (debarch_eq($file->{arch}, $fields->{'Architecture'}) ||
 400              debarch_eq($file->{arch}, 'all'))) {
 401             $dist->del_file($file->{filename});
 402         }
 403     }
 404
 405     $dist->add_file($forcefilename, $section, $priority);
 406     $dist->save("$fileslistfile.new");
 407
 408     rename "$fileslistfile.new", $fileslistfile
 409         or syserr(g_('install new files list file'));
 410
 411     # Release the lock
 412     close $lockfh or syserr(g_('cannot close %s'), $lockfile);
 413
 414     $fields->save("$outputfile.new");
 415
 416     rename "$outputfile.new", $outputfile
 417         or syserr(g_("cannot install output control file '%s'"), $outputfile);
 418 }
 419
 420 $substvars->warn_about_unused();