path: root/Master/tlpkg/etc/tlmgr1.pl-with-recreate-tlpdb

#!/usr/bin/env perl
# $Id: tlmgr.pl 11715 2008-12-25 09:27:37Z preining $
#
# Copyright 2008 Norbert Preining
# This file is licensed under the GNU General Public License version 2
# or any later version.
#

my $svnrev = '$Revision: 11715 $';
my $datrev = '$Date: 2008-12-25 10:27:37 +0100 (Thu, 25 Dec 2008) $';
my $tlmgrrevision;
if ($svnrev =~ m/: ([0-9]+) /) {
  $tlmgrrevision = $1;
} else {
  $tlmgrrevision = "unknown";
}
$datrev =~ s/^.*Date: //;
$datrev =~ s/ \(.*$//;
$tlmgrrevision .= " ($datrev)";


my $Master;

BEGIN {
  $^W = 1;
  $Master = `kpsewhich -var-value=SELFAUTOPARENT`;
  chomp($Master);
  unshift (@INC, "$Master/tlpkg");
}

use TeXLive::TLPOBJ;
use TeXLive::TLPDB;
use TeXLive::TLConfig;
use TeXLive::TLMedia;
use TeXLive::TLUtils;
use TeXLive::TLWinGoo;
use TeXLive::TLPostActions;
TeXLive::TLUtils->import(qw(member info give_ctan_mirror win32
                            merge_into copy log debug));
use Cwd qw/abs_path/;
use Pod::Usage;
use Getopt::Long qw(:config no_autoabbrev require_order);
use strict;

# used variables
# the TLMedia from which we install/update
my $tlmediasrc;
# the tlpdb of the install media
my $tlpdb;
# the local tlpdb
my $localtlpdb;
# a hash for saving the options saved into the local tlpdb
my %options;
# the location from where we install
my $location;

# each action uses this.
my @getopt_configure_subopts = qw(no_pass_through permute);

# option variables
my $opt_location;
my $opt_help = 0;
my $opt_version = 0;
my $opt_gui = 0;
my $opt_gui_lang;
my $opt_packagelogfile;
my $opt_pause = 0;

TeXLive::TLUtils::process_logging_options();
GetOptions("location=s" => \$opt_location,
           "gui" => \$opt_gui,
           "gui-lang=s" => \$opt_gui_lang,
           "package-logfile=s" => \$opt_packagelogfile,
           "version" => \$opt_version,
           "pause" => \$opt_pause,
           "h|help|?" => \$opt_help) or pod2usage(2);

my $action = shift;

if (!defined($action) && $opt_gui) {
  $action = "gui";
}

if ($opt_version || (defined $action && $action eq "version")) {
  print "tlmgr revision $tlmgrrevision\n";
  print "tlmgr using installation: $Master\n";
  if (open (REL_TL, "$Master/release-texlive.txt")) {
    # print first and last lines, which have the TL version info.
    my @rel_tl = <REL_TL>;
    print $rel_tl[0];
    print $rel_tl[$#rel_tl];
    close (REL_TL);
  }
  finish(0);
}

if (defined($action) && ($action =~ m/^help/i)) {
  $opt_help = 1;
}

if (!defined($action) && !$opt_help) {
  die "$0: missing action; try --help if you need it.\n";
}

if ($opt_help) {
  # perldoc does ASCII emphasis on the output, so it's nice to use it.
  # But not all Unix platforms have it, and on Windows our Config.pm
  # can apparently interfere, so always skip it there.
  my @noperldoc = ();
  if (win32() || ! TeXLive::TLUtils::which("perldoc")) {
    @noperldoc = ("-noperldoc", "1");
  }
  pod2usage("-exitstatus" => 0, "-verbose" => 2, @noperldoc);
}

# besides doing normal logging if -logfile is specified, we try to log
# package related actions (install, remove, update) to 
# the package-log file TEXMFSYSVAR/web2c/tlmgr.log
my $packagelogged = 0;  # how many msgs we logged
chomp (my $texmfsysvar = `kpsewhich -var-value=TEXMFSYSVAR`);
my $packagelogfile ||= "$texmfsysvar/web2c/tlmgr.log";
#
# Try to open the packagelog file, but do NOT die when that does not work
if (!open(PACKAGELOG, ">>$packagelogfile")) {
  debug("Cannot open package log file $packagelogfile for appending\n");
  debug("Will not log package installation/removal/update for that run\n");
  $packagelogfile = "";
}

my $loadmediasrcerror = "Cannot load TeX Live database from ";
my %ret;

if ($action =~ m/^_include_tlpobj$/) {
  # this is an internal function that should not be used outside
  init_local_db();
  for my $f (@ARGV) {
    my $tlpobj = TeXLive::TLPOBJ->new;
    $tlpobj->from_file($f);
    # we now have to check whether that is a .doc or .src package, so shipping
    # src or doc files from a different package.
    # We should have that package already installed ...
    my $pkg = $tlpobj->name;
    if ($pkg =~ m/^(.*)\.(src|doc)$/) {
      # got a .src or .doc package
      my $type = $2;
      my $mothership = $1;
      my $mothertlp = $localtlpdb->get_package($mothership);
      if (!defined($mothertlp)) {
        tlwarn("We are trying to add ${type}files to a not existing package $mothership!\n");
        tlwarn("Trying to continue!\n");
        # the best we can do is rename that package to $mothername and add it!
        $tlpobj->name($mothership);
        # add the src/docfiles tlpobj under the mothership name
        $localtlpdb->add_tlpobj($tlpobj);
      } else {
        if ($type eq "src") {
          $mothertlp->srcfiles($tlpobj->srcfiles);
          $mothertlp->srcsize($tlpobj->srcsize);
        } else {
          # must be "doc"
          $mothertlp->docfiles($tlpobj->docfiles);
          $mothertlp->docsize($tlpobj->docsize);
        }
        # that make sure that the original entry is overwritten
        $localtlpdb->add_tlpobj($mothertlp);
      }
    } else {
      # completely normal package, just add it
      $localtlpdb->add_tlpobj($tlpobj);
    }
    $localtlpdb->save;
  }
  finish(0);
} elsif ($action =~ m/^generate$/i) {
  merge_into(\%ret, action_generate());
} elsif ($action =~ m/^gui$/i) {
  action_gui();
} elsif ($action =~ m/^arch$/i) {
  merge_into(\%ret, action_arch());
} elsif ($action =~ m/^option$/i) {
  merge_into(\%ret, action_option());
  # should we do postinstall stuff?
  finish(0);
} elsif ($action =~ m/^list$/i) {
  merge_into(\%ret, action_list());
  # should we do postinstall stuff?
  finish(0);
} elsif ($action =~ m/^check$/i) {
  merge_into(\%ret, action_check());
} elsif ($action =~ m/^install$/i) {
  merge_into(\%ret, action_install());
} elsif ($action =~ m/^update$/i) {
  merge_into(\%ret, action_update());
} elsif ($action =~ m/^backup$/i) {
  merge_into(\%ret, action_backup());
} elsif ($action =~ m/^restore$/i) {
  merge_into(\%ret, action_restore());
} elsif ($action =~ m/^search$/i) {
  merge_into(\%ret, action_search());
  finish(0);
} elsif ($action =~ m/^show$/i) {
  merge_into(\%ret, action_show());
  finish(0);
} elsif ($action =~ m/^remove$/i) {
  merge_into(\%ret, action_remove());
} elsif (($action eq "paper") || ($action eq "dvips") || ($action eq "xdvi") ||
         ($action eq "pdftex") || ($action eq "dvipdfm") ||
         ($action eq "dvipdfmx") || ($action eq "context")) {
  if ($opt_gui) {
    action_gui("config");
  }
  init_local_db();
  my $TEXMFMAIN = `kpsewhich -var-value=TEXMFMAIN`;
  chomp $TEXMFMAIN;
  my @cmdline = ("texlua", "$TEXMFMAIN/scripts/texlive/texconf.tlu", "--prog", "tlmgr","--sys");
  if (!$localtlpdb->option_create_formats) {
    push @cmdline, "--noformat";
  }
  push @cmdline, $action, @ARGV;
  system(@cmdline);
} elsif ($action =~ m/^uninstall$/i) {
  merge_into(\%ret, action_uninstall());
  finish(0);
} elsif ($action =~ m/^recreate-tlpdb$/i) {
  merge_into(\%ret, action_recreate_tlpdb());
  finish(0);
} else {
  die "$0: unknown action: $action\n";
}

# main action is done, now clean up.

# close the special log file
if ($packagelogfile) {
  print "tlmgr: package log updated at $packagelogfile\n" if $packagelogged;
  close(PACKAGELOG);
}

# run external programs.
my $error_count = &handle_ret_hash(%ret);

# done.
finish($error_count ? 1 : 0);  # just in case there are 256 errors.


# 
# run external programs based on the RET hash we've accumulated.
# We return the number of unsuccessful runs, zero if all went well.
# 
sub handle_ret_hash
{
  my (%ret) = @_;
  my $errors = 0;
  
  if (defined($ret{'mktexlsr'})) {
    print "running mktexlsr\n";
    $errors += system("mktexlsr");
  }

  if (defined($ret{'map'})) {
    foreach my $m (@{$ret{'map'}}) {
      print "$m\n";
      $errors += system("updmap-sys --nomkmap --nohash --$m");
    }
    $errors += system("mktexlsr");
    $errors += system("updmap-sys");
  }

  chomp (my $TEXMFSYSVAR = `kpsewhich -var-value=TEXMFSYSVAR`);
  chomp (my $TEXMFLOCAL = `kpsewhich -var-value=TEXMFLOCAL`);

  if (defined($ret{'format'})) {
    print "regenerating fmtutil.cnf\n";
    TeXLive::TLUtils::create_fmtutil($localtlpdb,
      "$TEXMFSYSVAR/web2c/fmtutil.cnf",
      "$TEXMFLOCAL/web2c/fmtutil-local.cnf");
    # run fmtutil-sys only if the option for building formats is set.
    if ($localtlpdb->option_create_formats) {
      print "running fmtutil-sys --missing\n";
      $errors += system("fmtutil-sys", "--missing");
    }
  }

  if (defined($ret{'language'})) {
    for my $ext ("dat", "def") {
      my $lang = "language.$ext";
      print "regenerating $lang\n";
      
      my $arg1 = "$TEXMFSYSVAR/tex/generic/config/language.$ext";
      my $arg2 = "$TEXMFLOCAL/tex/generic/config/language-local.dat";
      if ($ext eq "dat") {
        TeXLive::TLUtils::create_language_dat($localtlpdb, $arg1, $arg2);
      } else {
        TeXLive::TLUtils::create_language_def($localtlpdb, $arg1, $arg2);
      }

      if (! TeXLive::TLUtils::win32()) {
        # Use full path for external command, except on Windows.
        $lang = "$TEXMFSYSVAR/tex/generic/config/$lang";
      }
      # run fmtutil-sys only if the option for building formats is set.
      if ($localtlpdb->option_create_formats) {
        print "running fmtutil-sys --byhyphen $lang\n";
        $errors += system("fmtutil-sys", "--byhyphen", $lang);
      }
    }
  }
  return $errors / 256; # we were accumulating wait statuses
}

# 
# remove_package removes a single package with all files (including the
# tlpobj files) and the entry from the tlpdb.
#
sub remove_package {
  my ($pkg, $localtlpdb) = @_;
  my $tlp = $localtlpdb->get_package($pkg);
  my %ret;
  if (!defined($tlp)) {
    tlwarn ("$pkg: package not present, cannot remove\n");
  } else {
    if ($pkg =~ m/^texlive\.infra/) {
      log ("Not removing $pkg, it is essential!\n");
      return;
    }
    # we have to chdir to $localtlpdb->root
    my $Master = $localtlpdb->root;
    chdir ($Master) || die "chdir($Master) failed: $!";
    my @files = $tlp->all_files;
    # also remove the .tlpobj file
    push @files, "tlpkg/tlpobj/$pkg.tlpobj";
    # and the ones from src/doc splitting
    if (-r "tlpkg/tlpobj/$pkg.src.tlpobj") {
      push @files, "tlpkg/tlpobj/$pkg.src.tlpobj";
    }
    if (-r "tlpkg/tlpobj/$pkg.doc.tlpobj") {
      push @files, "tlpkg/tlpobj/$pkg.doc.tlpobj";
    }
    #
    # we want to check that a file is only listed in one package, so
    # in case that a file to be removed is listed in another package
    # we will warn and *not* remove it
    my %allfiles;
    for my $p ($localtlpdb->list_packages) {
      next if ($p eq $pkg); # we have to skip the to be removed package
      for my $f ($localtlpdb->get_package($p)->all_files) {
      	$allfiles{$f} = $p;
      }
    }
    my @goodfiles = ();
    my @badfiles = ();
    for my $f (@files) {
      if (defined($allfiles{$f})) {
        # this file should be removed but is mentioned somewhere, too
        push @badfiles, $f;
      } else {
        push @goodfiles, $f;
      }
    }
    if ($#badfiles >= 0) {
      # warn the user
      tlwarn("The following files should be removed due to the removal of $pkg,\n");
      tlwarn("but are part of another package, too.\n");
      for my $f (@badfiles) {
        tlwarn(" $f - $allfiles{$f}\n");
      }
    }
    my @removals = &removed_dirs (@goodfiles);
    foreach my $entry (@goodfiles) {
      unlink $entry;
    }
    foreach my $entry (@removals) {
      rmdir $entry;
    }
    $localtlpdb->remove_package($pkg);
    merge_into(\%ret, $tlp->make_return_hash_from_executes("disable"));
    $ret{'mktexlsr'} = 1;
    # should we save at each removal???
    # advantage: the tlpdb actually reflects what is installed
    # disadvantage: removing a collection calls the save routine several times
    # still I consider it better that the tlpdb is in a consistent state
    $localtlpdb->save;
    # do the post removal actions
    if (defined($PostRemove{$pkg})) {
      info("running post remove action for $pkg\n");
      &{$PostRemove{$pkg}}($localtlpdb->root);
    }
  }
  return \%ret;
}

#  REMOVE
#
# tlmgr remove foo bar baz
#   will remove the packages foo bar baz itself
#   and will remove all .ARCH dependencies, too
#   and if some of them are collections it will also remove the
#   depending packages which are NOT Collections|Schemes.
#   if some of them are referenced somewhere they will not be removed
#   unless --force given
#
# tlmgr remove --no-depends foo bar baz
#   will remove the packages foo bar baz itself without any dependencies
#   but it will still remove all .ARCH dependency
#   if some of them are referenced somewhere they will not be removed
#   unless --force given
#
# tlmgr remove --no-depends-at-all foo bar baz 
#   willabsolutely only install foo bar baz not even taking .ARCH into
#   account
#
sub action_remove {
  if ($opt_gui) {
    action_gui("remove");
  }
  # we do the following:
  # - (not implemented) order collections such that those depending on
  #   other collections are first removed, and then those which only
  #   depend on packages. Otherwise
  #     remove collection-latex collection-latexrecommended
  #   will not succeed
  # - first loop over all cmd line args and consider only the collections
  # - for each to be removed collection:
  #   . check that no other collections/scheme asks for that collection
  #   . remove the collection
  #   . remove all dependencies
  # - for each normal package not already removed (via the above)
  #   . check that no collection/scheme still depends on this package
  #   . remove the package
  #
  my %ret;
  my $opt_nodepends = 0;
  my $opt_reallynodepends = 0;
  my $opt_force = 0;
  my $opt_dry = 0;
  Getopt::Long::Configure(@getopt_configure_subopts);
  GetOptions("no-depends"        => \$opt_nodepends,
             "no-depends-at-all" => \$opt_reallynodepends,
             "force"             => \$opt_force,
             "n|dry-run"         => \$opt_dry) or pod2usage(2);
  $opt_nodepends = 1 if $opt_reallynodepends;
  my %already_removed;
  my @more_removal;
  init_local_db();
  info("remove: dry run, no changes will be made\n") if $opt_dry;
  my @packs = @ARGV;
  #
  # we have to be carefull not to remove too many packages. The idea is
  # as follows:
  # - let A be the set of all packages to be removed from the cmd line
  # - let A* be the set of A with all dependencies expanded
  # - let B be the set of all packages
  # - let C = B \ A*, ie the set of all packages without those packages
  #   in the set of A*
  # - let C* be the set of C with all dependencies expanded
  # - let D = A* \ C*, ie the set of all packages to be removed (A*)
  #   without all the package that are still needed (C*)
  # - remove all package in D
  # - for any package in A (not in A*, in A, ie on the cmd line) that is
  #   also in C* (so a package that was asked for to be removed on the
  #   cmd line, but it isn't because someone else asks for it), warn the
  #   user that it is still needed
  #
  # remove all .ARCH dependencies, too, unless $opt_reallynodepends
  @packs = $localtlpdb->expand_dependencies("-only-arch", $localtlpdb, @packs) unless $opt_reallynodepends;
  # remove deps unless $opt_nodepends
  @packs = $localtlpdb->expand_dependencies("-no-collections", $localtlpdb, @packs) unless $opt_nodepends;
  my %allpacks;
  for my $p ($localtlpdb->list_packages) { $allpacks{$p} = 1; }
  for my $p (@packs) { delete($allpacks{$p}); }
  my @neededpacks = $localtlpdb->expand_dependencies($localtlpdb, keys %allpacks);
  my %packs;
  my %origpacks;
  my @origpacks = $localtlpdb->expand_dependencies("-only-arch", $localtlpdb, @ARGV) unless $opt_reallynodepends;
  for my $p (@origpacks) { $origpacks{$p} = 1; }
  for my $p (@packs) { $packs{$p} = 1; }
  for my $p (@neededpacks) { 
    if (defined($origpacks{$p})) {
      # that package was asked for to be removed on the cmd line
      my @needed = $localtlpdb->needed_by($p);
      if ($opt_force) {
        info("tlmgr: $p is needed by " . join(" ", @needed) . "\n");
        info("tlmgr: still removing it due to --force\n");
      } else {
        delete($packs{$p});
        tlwarn("tlmgr: not removing $p, needed by " .
          join(" ", @needed) . "\n");
      }
    } else {
      delete($packs{$p});
    }
  }
  @packs = keys %packs;
  foreach my $pkg (sort @packs) {
    my $tlp = $localtlpdb->get_package($pkg);
    next if defined($already_removed{$pkg});
    if (!defined($tlp)) {
      print "$pkg: package not present, cannot remove\n";
    } else {
      # in the first round we only remove collections, nothing else
      # but removing collections will remove all dependencies, too
      # save the information of which packages have already been removed
      # into %already_removed.
      if ($tlp->category eq "Collection") {
        my %foo;
        info ("remove $pkg\n");
        if ($opt_dry) {
          # we need to set $foo to something positive otherwise
          # the rest will not be run in dry_run mode
          $foo{'mktexlsr'} = 1;
        } else {
          merge_into(\%foo, &remove_package($pkg, $localtlpdb));
          logpackage("remove: $pkg");
        }
        if (keys %foo) {
          # removal was successful, so the return is at least 0x0001 mktexlsr
          # remove dependencies, too
          merge_into(\%ret, \%foo);
          $already_removed{$pkg} = 1;
        }
      } else {
        # save all the other packages into the @more_removal list to
        # be removed at the second state. Note that if a package has
        # already been removed due to a removal of a collection
        # it will be marked as such in %already_removed and not tried again
        push @more_removal, $pkg;
      }
    }
  }
  foreach my $pkg (sort @more_removal) {
    if (!defined($already_removed{$pkg})) {
      info ("remove $pkg\n");
      if (!$opt_dry) {
        my %foo;
        merge_into(\%foo, &remove_package($pkg, $localtlpdb));
        if (keys %foo) {
          # removal was successful
          logpackage("remove: $pkg");
          merge_into(\%ret, \%foo);
          $already_removed{$pkg} = 1;
        }
      }
    }
  }
  if ($opt_dry) {
    # stop here, don't do any postinstall actions
    return;
  } else {
    $localtlpdb->save;
    my @foo = sort keys %already_removed;
    if (@foo) {
      print "tlmgr: actually removed these packages: @foo\n";
    } else {
      print "tlmgr: no packages removed.\n";
    }
    return(\%ret);
  }
}

sub action_show {
  if ($opt_gui) {
    action_gui("config");
  }
  my $opt_list = 0;
  Getopt::Long::Configure(@getopt_configure_subopts);
  GetOptions("list" => \$opt_list) or pod2usage(2);
  init_local_db();
  my $tlmediatlpdb;
  foreach my $pkg (@ARGV) {
    my $tlpdb = $localtlpdb;
    my $tlp = $localtlpdb->get_package($pkg);
    my $installed = 0;
    if (!$tlp) {
      if (!$tlmediatlpdb) {
        init_tlmedia();
        $tlmediatlpdb = $tlmediasrc->tlpdb;
      }
      $tlp = $tlmediatlpdb->get_package($pkg);
      $tlpdb = $tlmediatlpdb;
    } else {
      $installed = 1;
    }
    if ($tlp) {
      my @colls;
      if ($tlp->category ne "Collection" && $tlp->category ne "Scheme") {
        @colls = $localtlpdb->needed_by($pkg);
        if (!@colls) {
          # not referenced in the local tlpdb, so try the remote here, too
          if (!$tlmediatlpdb) {
            init_tlmedia();
            $tlmediatlpdb = $tlmediasrc->tlpdb;
          }
          @colls = $tlmediatlpdb->needed_by($pkg);
        }
      }
      print "Package:    ", $tlp->name, "\n";
      print "Category:   ", $tlp->category, "\n";
      print "ShortDesc:  ", $tlp->shortdesc, "\n" if ($tlp->shortdesc);
      print "LongDesc:   ", $tlp->longdesc, "\n" if ($tlp->longdesc);
      print "Installed:  ", ($installed ? "Yes" : "No"), "\n";
      print "Revision:   ", $tlp->revision, "\n" if ($installed);
      print "Collection: ", @colls, "\n" if (@colls);
      if ($opt_list) {
        print "Included files, by type:\n";
        # if the package has a .ARCH dependency we also list the files for
        # those packages
        my @todo = $tlpdb->expand_dependencies("-only-arch", $tlpdb, ($pkg));
        for my $d (sort @todo) {
          my $foo = $tlpdb->get_package($d);
          if (!$foo) {
            warn "That should not happen, no such package here!";
            next;
          }
          if ($d ne $pkg) {
            print "depending package $d:\n";
          }
          if ($foo->runfiles) {
            print "run files:\n";
            for my $f (sort $foo->runfiles) { print "  $f\n"; }
          }
          if ($foo->srcfiles) {
            print "source files:\n";
            for my $f (sort $foo->srcfiles) { print "  $f\n"; }
          }
          if ($foo->docfiles) {
            print "doc files:\n";
            for my $f (sort $foo->docfiles) { print "  $f\n"; }
          }
          # in case we have them
          if ($foo->allbinfiles) {
            print "bin files (all architectures):\n";
            for my $f (sort $foo->allbinfiles) { print " $f\n"; }
          }
        }
      }
      print "\n";
    } else {
      printf STDERR "tlmgr: cannot find $pkg\n";
    }
  }
  return;
}

sub action_search {
  my $opt_global = 0;
  my $opt_file = 0;
  Getopt::Long::Configure(@getopt_configure_subopts);
  GetOptions("global" => \$opt_global,
             "file"   => \$opt_file) or pod2usage(2);
  my $r = shift @ARGV;
  my $ret = "";
  my $tlpdb;
  init_local_db();
  if ($opt_global) {
    init_tlmedia();
    $tlpdb = $tlmediasrc->tlpdb;
  } else {
    $tlpdb = $localtlpdb;
  }
  foreach my $pkg ($tlpdb->list_packages) {
    if ($opt_file) {
      my @ret = grep(m;$r;, $tlpdb->get_package($pkg)->all_files);
      if (@ret) {
        print "$pkg:\n";
        foreach (@ret) {
          print "\t$_\n";
        }
      }
    } else {
      next if ($pkg =~ m/\./);
      my $t = $tlpdb->get_package($pkg)->shortdesc;
      $t |= "";
      my $lt = $tlpdb->get_package($pkg)->longdesc;
      $lt |= "";
      if (($pkg =~ m/$r/) || ($t =~ m/$r/) || ($lt =~ m/$r/)) {
        $ret .= " $pkg - $t\n";
      }
    }
  }
  print "$ret";
  return;
}

#  RESTORE
# 
sub action_restore {
  # tlmgr restore --backupdir dir 
  #   lists all packages with all revisions
  # tlmgr restore --backupdir dir pkg
  #   lists all revisions of pkg
  # tlmgr restore --backupdir dir pkg rev
  #   restores pkg to revision rev
  my $opt_backupdir;
  my $opt_force;
  my $opt_dry = 0;
  Getopt::Long::Configure(@getopt_configure_subopts);
  GetOptions("backupdir=s" => \$opt_backupdir,
             "n|dry-run"   => \$opt_dry,
             "force"       => \$opt_force) or pod2usage(2);
  # check the backup dir argument
  if ($opt_backupdir) {
    my $ob = abs_path($opt_backupdir);
    $ob && ($opt_backupdir = $ob);
    if (! -d $opt_backupdir) {
      tlwarn ("backupdir argument $opt_backupdir is not a directory.\n");
      tlwarn ("Don't know from where to restore backups, terminating.\n");
      exit 1;
    }
  } else {
    # no argument, check for presence in TLPDB
    $opt_backupdir = $localtlpdb->option("backupdir");
    if (!$opt_backupdir) {
      tlwarn ("Don't know from where to restore backups, terminating.\n");
      exit 1;
    }
    # we are stil here, there is something set in tlpdb
    my $ob = abs_path($opt_backupdir);
    $ob && ($opt_backupdir = $ob);
    if (! -d $opt_backupdir) {
      tlwarn ("backupdir as set in tlpdb $opt_backupdir is not a directory.\n");
      tlwarn ("Don't know from where to restore backups, terminating.\n");
      exit 1;
    }
  }

  info("restore: dry run, no changes will be made\n") if $opt_dry;

  # initialize the hash(packages) of hash(revisions)
  my %backups;
  opendir (DIR, $opt_backupdir) || die "opendir($opt_backupdir) failed: $!";
  my @dirents = readdir (DIR);
  closedir (DIR) || warn "closedir($opt_backupdir) failed: $!";
  for my $dirent (@dirents) {
    next if (-d $dirent);
    next if ($dirent !~ m/^(.*)\.r([0-9]+)\.tar\.lzma$/);
    $backups{$1}->{$2} = 1;
  }
  my $ret;
  my ($pkg, $rev) = @ARGV;
  if (!defined($pkg)) {
    if (keys %backups) {
      print "Available backups:\n";
      foreach my $p (sort keys %backups) {
        print "$p: ";
        my @rs = sort (keys %{$backups{$p}});
        print "@rs\n";
      }
    } else {
      print "No backups available in $opt_backupdir\n";
    }
    finish(0);
  }
  if (!defined($rev)) {
    print "Available backups for $pkg: ";
    my @rs = sort (keys %{$backups{$pkg}});
    print "@rs\n";
    finish(0);
  }
  # we did arrive here, so we try to restore ...
  if (defined($backups{$pkg}->{$rev})) {
    if (!$opt_force) {
      print "Do you really want to restore $pkg to revision $rev (y/N): ";
      my $yesno = <STDIN>;
      if ($yesno !~ m/^y(es)?$/i) {
        print "Ok, cancelling the restore!\n";
        finish(0);
      }
    }
    print "Restoring $pkg, $rev from $opt_backupdir/${pkg}.r${rev}.tar.lzma\n";
    if (!$opt_dry) {
      init_local_db(1);
      # first remove the package, then reinstall it
      # this way we get rid of useless files
      $opt_backupdir = abs_path($opt_backupdir);
      merge_into(\%ret, &remove_package($pkg, $localtlpdb));
      TeXLive::TLMedia->_install_package("$opt_backupdir/${pkg}.r${rev}.tar.lzma" , [] ,$localtlpdb);
      logpackage("restore: $pkg ($rev)");
      # now we have to read the .tlpobj file and add it to the DB
      my $tlpobj = TeXLive::TLPOBJ->new;
      $tlpobj->from_file($localtlpdb->root . "/tlpkg/tlpobj/$pkg.tlpobj");
      $localtlpdb->add_tlpobj($tlpobj);
      $ret = $localtlpdb->get_package($pkg)->make_return_hash_from_executes("enable");
      $localtlpdb->save;
    }
  } else {
    print "revision $rev for $pkg is not present in $opt_backupdir\n";
  }
  return $ret;
}

sub action_backup {
  init_local_db(1);
  my $opt_dry = 0;
  my $opt_all = 0;
  my $opt_backupdir;
  # --clean argument
  # can be either -1 ... don't clean
  #               0  ... remove all backups
  #               N  ... keep only N backups
  # that parallels the value of autoclean in the configuration
  # we have to be careful, because if simply --clean is given, we should
  # check for the value saved in the tlpdb, and if that is not present
  # do nothing. But Getopt::Long with clean:i leaves 0 in $opt_clean if
  # it is present. So
  # !defined($opt_clean)  -> no --clean given
  # $opt_clean = ""       -> --clean without argument given, check tlpdb
  # $opt_clean = -1, 0, N -> --clean=N given, check argument
  #
  my $opt_clean;
  Getopt::Long::Configure(@getopt_configure_subopts);
  GetOptions("all" => \$opt_all,
             "backupdir=s" => \$opt_backupdir,
             "clean:s" => \$opt_clean,
             "n|dry-run"  => \$opt_dry,
            ) or pod2usage(2);
  my $clean_mode = 0;
  $clean_mode = 1 if defined($opt_clean);
  if ($clean_mode) {
    if ($opt_clean eq "") {
      # we need to check the tlpdb
      $opt_clean = $localtlpdb->option("autobackup");
      if (!$opt_clean) {
        tlwarn ("--clean given without an argument, but no default clean\n");
        tlwarn ("mode specified in the tlpdb, terminating.\n");
        exit 1;
      }
    }
    # now $opt_clean is something, but maybe not a number, check for
    # validity
    if ($opt_clean =~ m/^(-1|[0-9]+)$/) {
      # get rid of leading zeros etc etc
      $opt_clean = $opt_clean + 0;
    } else {
      tlwarn ("clean mode as specified on the command line or as given by default\n");
      tlwarn ("must be an integer larger or equal than -1, terminating.\n");
      exit 1;
    }
  }
  # check the backup dir argument
  if ($opt_backupdir) {
    my $ob = abs_path($opt_backupdir);
    $ob && ($opt_backupdir = $ob);
    if (! -d $opt_backupdir) {
      tlwarn ("backupdir argument $opt_backupdir is not a directory.\n");
      if ($clean_mode) {
        tlwarn ("Cannot clean a non existing directory, terminating.\n");
      } else {
        tlwarn ("Don't know where to save backups, terminating.\n");
      }
      exit 1;
    }
  } else {
    # no argument, check for presence in TLPDB
    $opt_backupdir = $localtlpdb->option("backupdir");
    if (!$opt_backupdir) {
      if ($clean_mode) {
        tlwarn ("Cannot clean an unknown directory, terminating.\n");
      } else {
        tlwarn ("Don't know where to save backups, terminating.\n");
      }
      exit 1;
    }
    # we are stil here, there is something set in tlpdb
    my $ob = abs_path($opt_backupdir);
    $ob && ($opt_backupdir = $ob);
    if (! -d $opt_backupdir) {
      tlwarn ("backupdir as set in tlpdb $opt_backupdir is not a directory.\n");
      if ($clean_mode) {
        tlwarn ("Cannot clean a non existing directory, terminating.\n");
      } else {
        tlwarn ("Don't know where to save backups, terminating.\n");
      }
      exit 1;
    }
  }

  my %ret;
  my @todo;
  if ($opt_all) {
    @todo = $localtlpdb->list_packages;
  } else {
    @todo = @ARGV;
    @todo = $localtlpdb->expand_dependencies("-only-arch", $localtlpdb, @todo);
  }
  if (!@todo) {
    printf "tlmgr backup takes either a list of packages or --all\n";
  }
  foreach my $pkg (@todo) {
    if ($clean_mode) {
      clear_old_backups ($pkg, $opt_backupdir, $opt_clean, $opt_dry);
    } else {
      my $tlp = $localtlpdb->get_package($pkg);
      info("saving current status of $pkg to $opt_backupdir${pkg}.r" . 
        $tlp->revision . ".\n");
      if (!$opt_dry) {
        $tlp->make_container("lzma", $localtlpdb->root, 
                             $opt_backupdir, "${pkg}.r" . $tlp->revision);
      }
    }
  }
  return(\%ret);
}

sub open_w32_updater {
  my $root = shift;
  open UPDATER, ">" . $root . "/tlpkg/installer/updater.bat"
    or die "Cannot create updater.bat: $!";
  print UPDATER <<'EOF';
rem update program, can savely removed after it has been done
set tlupdate=%~dp0
set tldrive=%~d0

%tldrive%
cd %tlupdate%
rem now we are in .../tlpkg/installer
rem create tar.exe backup
copy tar.exe tarsave.exe
cd ..
cd ..
rem now we are in the root

EOF
;
  $::UPDATER = \*UPDATER;
}

$::updater_started = 0;

#
sub add_w32_updater {
  my ($tlp, $opt_dry) = @_;
  sub do_one {
    my $pkg = shift;
    print $::UPDATER <<EOF;
tlpkg\\installer\\lzma\\lzmadec.win32.exe  < temp\\$pkg.tar.lzma > temp\\$pkg.tar
tlpkg\\installer\\tarsave.exe -x -f temp\\$pkg.tar
call tlmgr _include_tlpobj tlpkg\\tlpobj\\$pkg.tlpobj
del temp\\$pkg.tar.lzma
del temp\\$pkg.tar
EOF
;
  }

  my $pkg = $tlp->name;
  # that could be more intelligent for decent $opt_dry output
  my $root = $localtlpdb->root;
  my $temp = "$root/temp";
  return if $opt_dry;
  if (!$::updater_started) {
    open_w32_updater($root);
    $::updater_started = 1;
  }
  # these packages cannot be upgrade on w32
  # so we have to create a update program
  my $media = $tlmediasrc->media;
  my $mediatlpdb = $tlmediasrc->tlpdb;
  my $remoteroot = $mediatlpdb->root;
  #
  # we have to download/copy also the src/doc files if necessary!
  my $container_src_split = $mediatlpdb->config_src_container;
  my $container_doc_split = $mediatlpdb->config_doc_container;
  # get options about src/doc splitting from $totlpdb
  my $opt_src = $localtlpdb->option_install_srcfiles;
  my $opt_doc = $localtlpdb->option_install_docfiles;
  my $real_opt_doc = $opt_doc;
  if ($tlp->category =~ m/documentation/i) {
    # we do install documenation files for category Documentation
    # even if opt_doc is false
    $real_opt_doc = 1;
  }
  my $do_src = 0;
  my $do_doc = 0;
  $do_src = 1 if ($container_src_split && $opt_src && $tlp->srcfiles);
  $do_doc = 1 if ($container_doc_split && $real_opt_doc && $tlp->docfiles);
  TeXLive::TLUtils::mkdirhier($temp);
  if ($media eq 'DVD') {
    tlwarn ("Creating updater from DVD currently not implemented!\n");
    tlwarn ("But it should not be necessary!\n");
  } else {
    if ($media eq 'CD') {
      copy("$remoteroot/$Archive/$pkg.tar.lzma", "$temp");
      copy("$remoteroot/$Archive/$pkg.doc.tar.lzma", "$temp") if $do_doc;
      copy("$remoteroot/$Archive/$pkg.src.tar.lzma", "$temp") if $do_src;
    } else { # net
      TeXLive::TLUtils::download_file("$remoteroot/$Archive/$pkg.tar.lzma", "$temp/$pkg.tar.lzma");
      TeXLive::TLUtils::download_file("$remoteroot/$Archive/$pkg.doc.tar.lzma", "$temp/$pkg.doc.tar.lzma") if $do_doc;
      TeXLive::TLUtils::download_file("$remoteroot/$Archive/$pkg.src.tar.lzma", "$temp/$pkg.src.tar.lzma") if $do_src;
    }
    # now we should have the file present
    if (! -r "$temp/$pkg.tar.lzma") {
      tlwarn ("Couldn't get $pkg.tar.lzma, that is bad\n");
    } else {
      # add lines to the un-archiver
      do_one ($pkg);
    }
    if ($do_src) {
      if (! -r "$temp/$pkg.src.tar.lzma") {
        tlwarn ("Couldn't get $pkg.src.tar.lzma, that is bad\n");
      } else {
        # add lines to the un-archiver
        do_one ("$pkg.src");
      }
    }
    if ($do_doc) {
      if (! -r "$temp/$pkg.doc.tar.lzma") {
        tlwarn ("Couldn't get $pkg.doc.tar.lzma, that is bad\n");
      } else {
        # add lines to the un-archiver
        do_one ("$pkg.doc");
      }
    }
  }
}

sub close_w32_updater {
  if ($::updater_started) {
    my $desktop_path = TeXLive::TLWinGoo::desktop_path();
    $desktop_path =~ s!/!\\!g;
    print $::UPDATER "del tlpkg\\installer\\tarsave.exe\n";
    print $::UPDATER "pause\n";
    print $::UPDATER "del \"$desktop_path\\TeX Live Updater Final Step.lnk\"\n";
    print $::UPDATER "rem del /s /q temp\n";
    print $::UPDATER "del \"\%~f0\"";
    close ($::UPDATER);
    # create a desktop shortcut
    add_desktop_shortcut(
      $localtlpdb->root,
      'TeX Live Updater Final Step',
      '', # the icon
      $localtlpdb->root.'/tlpkg/installer/updater.bat',
      '', # no args
      '', # any non-null value to hide command-prompt
    );
    tlwarn("UPDATER has been created, please execute\n");
    tlwarn("   " . $localtlpdb->root . "\\tlpkg\\installer\\updater.bat\n");
  }
}


#  UPDATE
#
# tlmgr update foo
#   if foo is of type Package|Documentation it will update only foo
#     and the respective .ARCH dependencies
#   if foo is of type Collection|Scheme it will update itself AND
#     will check all depending packs of type NOT(COllection|Scheme)
#     for necessary updates
#
# tlmgr update --no-depends foo
#   as above, but will not check for depends of Collections/Schemes
#   but it will still update .ARCH deps
#
# tlmgr update --no-depends-at-all foo
#   will absolutely only update foo not even taking .ARCH into account
# 
# TLMedia->install_package does ONLY INSTALL ONE PACKAGE, no deps whatsoever
# anymore. That has all to be done by hand.
# 
sub action_update {
  if ($opt_gui) {
    action_gui("update");
  }
  init_local_db(1);
  # initialize the TLMedia from $location
  my $opt_nodepends = 0;
  my $opt_reallynodepends = 0;
  my $opt_dry = 0;
  my $opt_all = 0;
  my $opt_list = 0;
  my $opt_noremove = 0;
  my $opt_backupdir;
  my $opt_backup = 0;
  my $opt_force = 0;
  Getopt::Long::Configure(@getopt_configure_subopts);
  GetOptions("no-depends"        => \$opt_nodepends,
             "no-depends-at-all" => \$opt_reallynodepends,
             "all"               => \$opt_all,
             "list"              => \$opt_list,
             "no-remove"         => \$opt_noremove,
             "force"             => \$opt_force,
             "backupdir=s"       => \$opt_backupdir,
             "backup"            => \$opt_backup,
             "n|dry-run"         => \$opt_dry) or pod2usage(2);
  $opt_nodepends = 1 if $opt_reallynodepends;
  my $nrupdated = 0;
  my %ret;
  
  init_tlmedia();
  my $mediatlpdb = $tlmediasrc->tlpdb;
  info("update: dry run, no changes will be made\n") if $opt_dry;

  # if the update is not for one of the critical packages then do
  # check for updates to tlmgr and die unless either --force or --list
  # is given
  my $other_updates_asked_for = 0;
  if ($opt_all) {
    $other_updates_asked_for = 1;
  } else {
    for my $p (@ARGV) {
      my $matched = 0;
      for my $cp (@CriticalPackagesList) {
        # we match for initial package name, that shold be fine
        if ($p =~ m/^$cp/) {
          $matched = 1;
          last;
        }
      }
      if (!$matched) {
        $other_updates_asked_for = 1;
        last;
      }
    }
  } 
  if ($other_updates_asked_for) {
    if (check_for_critical_updates($localtlpdb, $mediatlpdb)) {
      if ($opt_force) {
        tlwarn("$0: Continuing due to --force.\n");
      } elsif ($opt_list) {
        # do not warn here
      } else {
        die "$0: Exiting, please read above warning.\n";
      }
    }
  }

  # do backup dir checking now so that we don't run into troubles
  # later, and exit if that doesn't work
  if ($opt_backupdir) {
    $opt_backupdir = abs_path($opt_backupdir);
    if (! -d $opt_backupdir) {
      tlwarn("Argument for --backupdir must be an existing directory. Terminating.\n");
      exit 1;
    }
  }

  my $autobackup = 0;
  # check for the tlpdb option autobackup, and if present and true (!= 0)
  # assume we are doing backups
  if (!$opt_backup) {
    $autobackup = $localtlpdb->option("autobackup");
    if ($autobackup) {
      # check the format, we currently allow only natural numbers, and -1
      if ($autobackup eq "-1") {
        debug ("Automatic backups activated, keeping \\infty backups.\n");
        $opt_backup = 1;
      } elsif ($autobackup eq "0") {
        debug ("Automatic backups disabled.\n");
      } elsif ($autobackup =~ m/^[0-9]+$/) {
        debug ("Automatic backups activated, keeping $autobackup backups.\n");
        $opt_backup = 1;
      } else {
        tlwarn ("Option autobackup can only be an integer >= -1.\n");
        tlwarn ("Disabling auto backups.\n");
        $localtlpdb->option("autobackup", 0);
        $autobackup = 0;
      }
    }
  }

  # cmd line --backup, we check for --backupdir, and if that is not given
  # we try to get the default from the tlpdb. If that doesn't work, exit.
  if ($opt_backup) {
    my $diebackupdir = 0;
    if (!$opt_backupdir) {
      $opt_backupdir = $localtlpdb->option("backupdir");
      if ($opt_backupdir) {
        # check again:
        $opt_backupdir = abs_path($opt_backupdir);
        $diebackupdir = 1 if (! -d $opt_backupdir);
      } else {
        # not set in the tlpdb, and not set on cmd line, but asked for
        # --backup 
        $diebackupdir = 1;
      }
    } 
    # no else branch necessary, we already checked that --backupdir if 
    # given is ok, see above
    if ($diebackupdir) {
      tlwarn("You have asked for backups, but the backup directory as specified\n");
      tlwarn("in the local TLPDB or the cmd line does not exists, exiting.\n");
      exit 1;
    }
  }

  # finally, if we have --backupdir, but no --backup, just enable it
  $opt_backup = 1 if $opt_backupdir;
      
  debug("Doing backups to $opt_backupdir\n") if $opt_backup;

  # these two variables are used throughout this function
  my $root = $localtlpdb->root;
  my $temp = "$root/temp";

  # remove old _BACKUP packages that have piled up in temp
  # they can be recognized by their name starting with __BACKUP_
  for my $f (<$temp/__BACKUP_*>) {
    unlink($f) unless $opt_dry;
  }

  my @todo;
  my %removals;
  my %forcermpkgs;
  my %newpkgs;
  # check for new/removed/forcibly removed packages.
  # we start from the list of installed collections in the local tlpdb
  # which are also present in the remote database
  # and expand this list once with expand_dependencies in the local tlpdb
  # and once in the tlmedia tlpdb. Then we compare the lists
  # let A = set of local expansions
  #     B = set of remote expansions
  # then we should(?) have
  #     B \ A  set of new packages
  #     A \ B  set of packages removed on the server
  #     A \cup B set of packages which should be checked for forcible removal
  #
  my @colls = ();
  for my $p ($localtlpdb->collections) {
    push @colls, $p
      if defined($mediatlpdb->get_package($p));
  }
  my @localexpansion = 
    $localtlpdb->expand_dependencies($localtlpdb, @colls);
  my @remoteexpansion = 
    $mediatlpdb->expand_dependencies($localtlpdb, @colls);
  for my $p (@remoteexpansion) {
    $newpkgs{$p} = 1;
  }
  for my $p (@localexpansion) {
    delete($newpkgs{$p});
    $removals{$p} = 1;
  }
  for my $p (@remoteexpansion) {
    delete($removals{$p});
  }
  for my $p (@localexpansion) {
    # intersection, don't check A\B and B\A
    next if $newpkgs{$p};
    next if $removals{$p};
    my $tlp = $localtlpdb->get_package($p);
    if (!defined($tlp)) {
      $forcermpkgs{$p} = 1;
    }
  }
  debug ("tlmgr: new pkgs: " . join("\n\t",keys %newpkgs) . "\n");
  debug ("tlmgr: deleted : " . join("\n\t",keys %removals) . "\n");
  debug ("tlmgr: forced  : " . join("\n\t",keys %forcermpkgs) . "\n");

  if ($opt_all || $opt_list) {
    @todo = $localtlpdb->list_packages;
  } else {
    @todo = @ARGV;
  }

  #
  # we have to remove all the stuff before we install other packages
  # to support moving of files from one package to another.
  # remove the packages that have disappeared:
  for my $p (keys %removals) {
    if ($opt_noremove) {
      info("not removing $p due to -no-remove (removed on server)\n");
    } else {
      info("remove $p (removed on server)\n");
    }
    if (!($opt_dry or $opt_list or $opt_noremove)) {
      merge_into(\%ret, &remove_package($p, $localtlpdb));
      logpackage("remove: $p");
    }
  }

  if (!@todo) {
    tlwarn("tlmgr update: please specify a list of packages or --all.\n");
  }

  # update all .ARCH dependencies, too, unless $opt_reallynodepends:
  @todo = $mediatlpdb->expand_dependencies("-only-arch", $localtlpdb, @todo)
    unless $opt_reallynodepends; 
  #
  # update general deps unless $opt_nodepends:
  @todo = $mediatlpdb->expand_dependencies("-no-collections",$localtlpdb,@todo)
    unless $opt_nodepends; 

  foreach my $pkg (sort @todo) {
    next if ($pkg =~ m/^00texlive/);
    my $tlp = $localtlpdb->get_package($pkg);
    if (!defined($tlp)) {
      # if the user has forcibly removed (say) bin-makeindex, then the
      # loop above has no way to add bin-makeindex.ARCH into the
      # %forcermpkgs hash, but the .ARCH will still be in the dependency
      # expansion.  So try both with and without the .ARCH extension.
      (my $pkg_noarch = $pkg) =~ s/\.[^.]*$//;
      my $forcerm_coll = $forcermpkgs{$pkg} || $forcermpkgs{$pkg_noarch};
      
      # similarly for new packages.  If latexmk is new, latexmk.ARCH
      # will be in the dependency expansion, and we want it.
      my $newpkg_coll = $newpkgs{$pkg} || $newpkgs{$pkg_noarch};
      if ($forcerm_coll) {
        info("skipping forcibly removed package $pkg\n");
        next;
      } elsif ($newpkg_coll) {
        # do nothing here, it will be reported below.
      } elsif (defined($removals{$pkg})) {
        # skipping this package, it has been removed due to server removal
        next;
      } else {
        tlwarn("\ntlmgr: $pkg mentioned, neither new nor forcibly removed\n");
        next;
      }
      # install new packages
      my $mediatlp = $mediatlpdb->get_package($pkg);
      if (!defined($mediatlp)) {
        tlwarn("\nShould not happen: $pkg not found in $location\n");
        next;
      }
      my $mediarev = $mediatlp->revision;
      info("auto-install: $pkg\n");
      next if ($opt_dry || $opt_list);
      my $foo = $tlmediasrc->install_package($pkg, $localtlpdb);
      if (ref $foo) {
        # installation succeeded because we got a reference
        merge_into (\%ret, $foo);
        logpackage("auto-install new: $pkg ($mediarev)");
        $nrupdated++;
      } else {
        tlwarn("$0: couldn't install new package $pkg\n");
      }
      next;
    }

    my $unwind_package;
    my $remove_unwind_container = 0;
    my $rev = $tlp->revision;
    my $mediatlp = $mediatlpdb->get_package($pkg);
    if (!defined($mediatlp)) {
      debug("$pkg cannot be found in $location\n");
      next;
    }
    my $mediarev = $mediatlp->revision;
    if ($rev < $mediarev) {
      $nrupdated++;
      if ($opt_list) {
        info("$pkg: local: $rev, source: $mediarev\n");
      } else {
        if ($opt_backup && !$opt_dry) {
          $tlp->make_container("lzma", $root, 
                               $opt_backupdir, "${pkg}.r" . $tlp->revision);
          $unwind_package = 
            "$opt_backupdir/${pkg}.r" . $tlp->revision . ".tar.lzma";

          if ($autobackup) {
            # in case we do auto backups we remove older backups
            clear_old_backups($pkg, $opt_backupdir, $autobackup);
          }
        }

        if (win32() && ($pkg =~ m/$WinSpecialUpdatePackagesRegexp/)) {
          add_w32_updater($mediatlp, $opt_dry);
        } else {
          info("update: $pkg ($rev -> $mediarev)");
          if ($opt_dry) {
            info("\n");
            next;
          } else {
            info(" ... ");  # more to come
          }

          if (!$unwind_package) {
            # no backup was made, so let us create a temporary .tar file
            # of the package
            my $tlp = $localtlpdb->get_package($pkg);
            my ($s, $m, $fullname) = $tlp->make_container("tar", $root, $temp, 
                                          "__BACKUP_${pkg}.r" . $tlp->revision);
            if ($s <= 0) {
              tlwarn("\n$0: Creation of backup container of $pkg failed.\n");
              tlwarn("Continuing to update other packages, please retry...\n");
              # we should try to update other packages at least
              next;
            }
            $remove_unwind_container = 1;
            $unwind_package = "$fullname";
          }
          # first remove the package, then reinstall it
          # this way we get rid of useless files
          # force the deinstallation since we will reinstall it
          #
          # the remove_package should also remove empty dirs in case
          # a dir is changed into a file
          merge_into(\%ret, &remove_package($pkg, $localtlpdb));
          my $foo = $tlmediasrc->install_package($pkg, $localtlpdb);
          if (ref $foo) {
            # installation succeeded because we got a reference
            merge_into (\%ret, $foo);
            logpackage("update: $pkg ($rev -> $mediarev)");
            unlink($unwind_package) if $remove_unwind_container;
          } else {
            # install_package returned a scalar, so error.
            # now in fact we should do some cleanup, removing files and
            # dirs from the new package before re-installing the old one.
            # TODO
            logpackage("failed update: $pkg ($rev -> $mediarev)");
            tlwarn("\n\nInstallation of new version of $pkg did fail, trying to unwind.\n");
            if (win32()) {
              # w32 is notorious for not releasing a file immediately
              # we experienced permission denied errors 
              my $newname = $unwind_package;
              $newname =~ s/__BACKUP/___BACKUP/;
              copy ("-f", $unwind_package, $newname);
              # try to remove the file if has been created by us
              unlink($unwind_package) if $remove_unwind_container;
              # and make sure that the temporary file is removed in any case
              $remove_unwind_container = 1;
              $unwind_package = $newname;
            }
            my $instret = TeXLive::TLMedia->_install_package("$unwind_package",
                                                             [], $localtlpdb);
            if ($instret) {
              # now we have to include the tlpobj
              my $tlpobj = TeXLive::TLPOBJ->new;
              $tlpobj->from_file($root . "/tlpkg/tlpobj/$pkg.tlpobj");
              $localtlpdb->add_tlpobj($tlpobj);
              $localtlpdb->save;
              logpackage("restore: $pkg ($rev)");
              tlwarn("Restoring old package state succeeded.\n");
            } else {
              logpackage("restore failed: $pkg ($rev)");
              tlwarn("Restoring of old package did NOT succeed.\n");
              tlwarn("Most likely repair: run tlmgr install $pkg and hope.\n");
            }
            unlink($unwind_package) if $remove_unwind_container;
          }
          info("done\n");
        }
      }
    } elsif ($rev > $mediarev) {
      print "$pkg: local revision ($rev) is newer than revision in $location"
            . " ($mediarev), not updating.\n";
      next;
    }
  }
  # that already checks whether we actually have to do something
  close_w32_updater();
  if (($nrupdated == 0) && ($tlmediasrc->media ne "NET") && $opt_all) {
    # for all but net updates we warn if nothing is updated
    tlwarn("\nNothing to update.\n");
    tlwarn("\nYour installation is set up to look on the disk for updates.\n");
    tlwarn("To install from the Internet for this one time only, run\n");
    tlwarn("  tlmgr -location $TeXLiveURL\n");
    tlwarn("\nTo change the default for all future updates, run\n");
    tlwarn("  tlmgr option location $TeXLiveURL\n\n");
  }
  return(\%ret);
}

#  INSTALL
#
# tlmgr install foo bar baz
#   will create the closure under dependencies of {foo,bar,baz}, i.e. all
#   dependencies recursively down to the last package, and install all
#   the packages that are necessary
#
# tlmgr install --no-depends foo bar baz
#   will *only* install these three packages (if they are not already installed
#   but it will STILL INSTALL foo.ARCH if they are necessary.
#
# tlmgr install --no-depends-at-all foo bar baz
#   will absolutely only install these three packages, and will not even
#   take .ARCH deps into account
#
# tlmgr install --reinstall ...
#   behaves exactely like without --reinstall BUT the following two 
#   differences:
#   . dependencies are not expanded from collection to collection, so
#     if you reinstall a collection then all its dependencies of type
#     Package will be reinstalled, too, but not the dependencies on
#     other collection, because that would force the full reinstallation
#     of the whole installation
#   . it does not care for whether a package seems to be installed or
#     not (that is the --reinstall)
#
# TLMedia->install_package does ONLY INSTALL ONE PACKAGE, no deps whatsoever
# anymore!  That has all to be done by hand.
# 
sub action_install {
  if ($opt_gui) {
    action_gui("install");
  }
  init_local_db(1);
  # initialize the TLMedia from $location
  my $opt_nodepends = 0;
  my $opt_reallynodepends = 0;
  my $opt_dry = 0;
  my $opt_reinstall = 0;
  my $opt_force = 0;
  Getopt::Long::Configure(@getopt_configure_subopts);
  GetOptions("no-depends"        => \$opt_nodepends,
             "no-depends-at-all" => \$opt_reallynodepends,
             "reinstall"         => \$opt_reinstall,
             "force"             => \$opt_force,
             "n|dry-run"         => \$opt_dry) or pod2usage(2);
  my %ret;
  init_tlmedia();
  my $tlmediatlpdb = $tlmediasrc->tlpdb;

  # check for updates to tlmgr itself, and die unless --force is given
  if(check_for_critical_updates( $localtlpdb, $tlmediatlpdb, !$opt_force)) {
    die "not continuing, please see warning above!";
  }

  $opt_nodepends = 1 if $opt_reallynodepends;
  info("install: dry run, no changes will be made\n") if $opt_dry;

  my @packs = @ARGV;
  # first expand the .ARCH dependencies unless $opt_reallynodepends
  @packs = $tlmediatlpdb->expand_dependencies("-only-arch", $localtlpdb, @ARGV) unless $opt_reallynodepends;
  # now expand all others unless $opt_nodepends
  # if $opt_reinstall do not collection->collection dependencies
  if ($opt_reinstall) {
    @packs = $tlmediatlpdb->expand_dependencies("-no-collections", $localtlpdb, @packs) unless $opt_nodepends;
  } else {
    @packs = $tlmediatlpdb->expand_dependencies($localtlpdb, @packs) unless $opt_nodepends;
  }
  foreach my $pkg (sort @packs) {
    my $re = "";
    if (defined($localtlpdb->get_package($pkg))) {
      if ($opt_reinstall) {
        $re = "re";
      } else {
        debug("already installed: $pkg\n");
        next;
      }
    }
    info("${re}install: $pkg\n");
    if (!$opt_dry) {
      merge_into(\%ret, $tlmediasrc->install_package($pkg, $localtlpdb));
      logpackage("${re}install: $pkg");
    }
  }
  if ($opt_dry) {
    # stop here, don't do any postinstall actions
    return(0);
  }
  return(\%ret);
}

sub action_list {
  init_local_db();
  # make sure that the @ARGV hash is not changed in case we switch to 
  # show mode
  my ($what) = @ARGV;
  if ($what) {
    # if the argument to list is either 'collection' or 'scheme'
    # we list them, otherwise we go direct into tlmgr show $pkg mode
    if ($what !~ m/^(collection|scheme)/i) {
      tlwarn("(switching to show mode)\n");
      action_show();
      return;
    }
  } else {
    $what = "";
  }
  init_tlmedia();
  my @whattolist;
  if ($what =~ m/^collection/i) {
    @whattolist = $tlmediasrc->tlpdb->collections;
  } elsif ($what =~ m/^scheme/i) {
    @whattolist = $tlmediasrc->tlpdb->schemes;
  } else {
    @whattolist = $tlmediasrc->tlpdb->list_packages;
  }
  foreach (@whattolist) {
    if (defined($localtlpdb->get_package($_))) {
      print "i ";
    } else {
      print "  ";
    }
    my $foo = $tlmediasrc->tlpdb->get_package($_)->shortdesc;
    print "$_: ", defined($foo) ? $foo : "(shortdesc missing)" , "\n";
  }
  return;
}


sub action_option {
  if ($opt_gui) {
    action_gui("config");
  }
  my $what = shift @ARGV;
  $what = "show" unless defined($what);
  init_local_db();
  if ($what =~ m/^location$/i) {
    # changes the default location
    my $loc = shift @ARGV;
    if ($loc) {
      # support "ctan" on the cmd line, and don't abs_path it!
      if ($loc =~ m/^ctan$/i) {
        $loc = "$TeXLive::TLConfig::TeXLiveURL";
      }
      if ($loc !~ m!^(http|ftp)://!i) {
        # seems to be a local path, try to normalize it
        my $testloc = abs_path($loc);
        # however, if we were given a url, that will get "normalized" to the
        # empty string, it not being a path.  Restore the original value if so.
        $loc = $testloc if $testloc;
      }
      info("tlmgr: setting default installation location to $loc\n");
      $localtlpdb->option_location($loc);
      $localtlpdb->save;
    } else {
      info("Default installation location: "
           . $localtlpdb->option_location . "\n");
    }
  } elsif ($what =~ m/^docfiles$/i) {
    # changes the default docfiles
    my $loc = shift @ARGV;
    if (defined($loc)) {
      print "Defaulting to", ($loc ? "" : " not"),
            " installing documentation files.\n";
      $localtlpdb->option_install_docfiles($loc);
      $localtlpdb->save;
    } else {
      print "Install documentation files: ",
            $localtlpdb->option_install_docfiles, "\n";
    }
  } elsif ($what =~ m/^srcfiles$/i) {
    # changes the default srcfiles
    my $loc = shift @ARGV;
    if (defined($loc)) {
      print "Defaulting to", ($loc ? "" : " not"),
            " installing source files.\n";
      $localtlpdb->option_install_srcfiles($loc);
      $localtlpdb->save;
    } else {
      print "Install source files: ",
            $localtlpdb->option_install_srcfiles, "\n";
    }
  } elsif ($what =~ m/^formats$/i) {
    # changes the default formats
    my $loc = shift @ARGV;
    if (defined($loc)) {
      print "Defaulting to", ($loc ? "" : " not"),
            " generating format files on installation.\n";
      $localtlpdb->option_create_formats($loc);
      $localtlpdb->save;
    } else {
      print "Create formats on installation: ",
            $localtlpdb->option_create_formats, "\n";
    }
  } elsif ($what =~ m/^show$/i) {
    print "Default installation location (location): ",
          $localtlpdb->option_location, "\n";
    print "Create formats on installation (formats): ", 
          ($localtlpdb->option_create_formats ? "yes" : "no"), "\n";
    print "Install documentation files (docfiles):   ",
          ($localtlpdb->option_install_docfiles ? "yes": "no"), "\n";
    print "Install source files (srcfiles):          ",
          ($localtlpdb->option_install_srcfiles ? "yes": "no"), "\n";
    print "Directory for backups (backupdir):        ",
          $localtlpdb->option("backupdir"), "\n"
      if $localtlpdb->option("backupdir");
    print "Number of backups to keep (autobackup):   ",
          $localtlpdb->option("autobackup"), "\n"
      if $localtlpdb->option("autobackup");
  } else {
    my $val = shift @ARGV;
    if (defined($val)) {
      print "Setting option $what to $val.\n";
      $localtlpdb->option($what,$val);
      $localtlpdb->save;
    } else {
      print "Option $what = ", $localtlpdb->option($what), "\n";;
    }
    #warn "Setting other options currently not supported, please edit texlive.tlpdb!";
  }
  return;
}


#  ARCH
#
sub action_arch {
  if ($^O=~/^MSWin(32|64)$/i) {
    printf STDERR "action `arch' not supported on Windows\n";
  }
  if ($opt_gui) {
    action_gui("arch");
  }
  my %ret;
  my $opt_dry = 0;
  Getopt::Long::Configure(@getopt_configure_subopts);
  GetOptions("n|dry-run" => \$opt_dry) or pod2usage(2);
  my $what = shift @ARGV;
  init_local_db(1);
  info("arch: dry run, no changes will be made\n") if $opt_dry;
  $what || ($what = "list");
  if ($what =~ m/^list$/i) {
    # list the available architectures
    # initialize the TLMedia from $location
    init_tlmedia();
    my $mediatlpdb = $tlmediasrc->tlpdb;
    my @already_installed_arch = $localtlpdb->available_architectures;
    print "Available architectures:\n";
    foreach my $a ($mediatlpdb->available_architectures) {
      if (member($a,@already_installed_arch)) {
        print "(i) $a\n";
      } else {
        print "    $a\n";
      }
    }
    print "Already installed architectures are marked with (i)\n";
    print "You can add new architectures with tlmgr arch add arch1 arch2\n";
    finish(0);
  } elsif ($what =~ m/^add$/i) {
    init_tlmedia();
    my $mediatlpdb = $tlmediasrc->tlpdb;
    my @already_installed_arch = $localtlpdb->available_architectures;
    my @available_arch = $mediatlpdb->available_architectures;
    my @todoarchs;
    foreach my $a (@ARGV) {
      if (TeXLive::TLUtils::member($a, @already_installed_arch)) {
        print "Arch $a is already installed\n";
        next;
      }
      if (!TeXLive::TLUtils::member($a, @available_arch)) {
        print "Arch $a not available, use 'tlmgr available_archs'!\n";
        next;
      }
      push @todoarchs, $a;
    }
    foreach my $pkg ($localtlpdb->list_packages) {
      next if ($pkg =~ m/^00texlive/);
      my $tlp = $localtlpdb->get_package($pkg);
      foreach my $dep ($tlp->depends) {
        if ($dep =~ m/^(.*)\.ARCH$/) {
          # we have to install something
          foreach my $a (@todoarchs) {
            if ($opt_dry) {
              print "Installing $pkg.$a\n";
            } else {
              info("install: $pkg.$a\n");
              merge_into(\%ret, $tlmediasrc->install_package("$pkg.$a", $localtlpdb));
            }
          }
        }
      }
    }
    if (TeXLive::TLUtils::member('win32', @todoarchs)) {
      # install the necessary w32 stuff
      info("install: bin-tlperl.win32\n");
      merge_into (\%ret, $tlmediasrc->install_package("bin-tlperl.win32", $localtlpdb));
      info("install: bin-tlgs.win32\n");
      merge_into (\%ret, $tlmediasrc->install_package("bin-tlgs.win32", $localtlpdb));
      info("install: bin-tlpsv.win32\n");
      merge_into (\%ret, $tlmediasrc->install_package("bin-tlpsv.win32", $localtlpdb));
    }
    # update the option_archs list of installed archs
    my @larchs = $localtlpdb->option_available_architectures;
    push @larchs, @todoarchs;
    $localtlpdb->option_available_architectures(@larchs);
    $localtlpdb->save;
  } else {
    die "Unknown option for arch: $what";
  }
  return(\%ret);
}

sub action_generate {
  my $localconf = "";
  my $dest = "";
  Getopt::Long::Configure(@getopt_configure_subopts);
  GetOptions("localcfg=s" => \$localconf, "dest=s" => \$dest,) or pod2usage(2);
  my $what = shift @ARGV;
  init_local_db();

  chomp (my $TEXMFSYSVAR = `kpsewhich -var-value=TEXMFSYSVAR`);
  chomp (my $TEXMFLOCAL = `kpsewhich -var-value=TEXMFLOCAL`);
  
  if ($what =~ m/^language(\.dat|\.def)?$/i) {
    if ($what =~ m/^language(\.dat)?$/i) {
      $dest ||= "$TEXMFSYSVAR/tex/generic/config/language.dat";
      $localconf ||= "$TEXMFLOCAL/tex/generic/config/language-local.dat";
      debug ("$0: writing language.dat data to $dest\n");
      TeXLive::TLUtils::create_language_dat($localtlpdb, $dest, $localconf);
      $dest .= ".def";
    } 
    if ($what =~ m/^language(\.def)?$/i) {
      $dest ||= "$TEXMFSYSVAR/tex/generic/config/language.def";
      $localconf ||= "$TEXMFLOCAL/tex/generic/config/language-local.def";
      debug("$0: writing language.def data to $dest\n");
      TeXLive::TLUtils::create_language_def($localtlpdb, $dest, $localconf);
    } 

  } elsif ($what =~ m/^fmtutil$/i) {
    $dest ||= "$TEXMFSYSVAR/web2c/fmtutil.cnf";
    $localconf ||= "$TEXMFLOCAL/web2c/fmtutil-local.cnf";
    debug("$0: writing new fmtutil.cnf to $dest\n");
    TeXLive::TLUtils::create_fmtutil($localtlpdb, $dest, $localconf);

  } elsif ($what =~ m/^updmap$/i) {
    $dest ||= "$TEXMFSYSVAR/web2c/updmap.cfg";
    $localconf ||= "$TEXMFLOCAL/web2c/updmap-local.cfg";
    debug("$0: writing new updmap.cfg to $dest\n");
    TeXLive::TLUtils::create_updmap($localtlpdb, $dest, $localconf);

  } else {
    die "$0: Unknown option for generate: $what; try --help if you need it.\n";
  }

  return;
}

# set global $location variable.
# if we cannot read tlpdb, die if arg SHOULD_I_DIE is true.
# 
sub init_local_db {
  my ($should_i_die) = @_;
  $localtlpdb = TeXLive::TLPDB->new ("root" => $Master);
  die("cannot find tlpdb in $Master") unless (defined($localtlpdb));
  # setup the programs, for w32 we need the shipped wget/lzma etc, so we
  # pass the location of these files to setup_programs.
  my $ret = setup_programs("$Master/tlpkg/installer",
                           $localtlpdb->option_platform);
  if ($ret == -1) {
    tlwarn("no binary of lzmadec for $::_platform_ detected.\n");
    if (defined($should_i_die) && $should_i_die) {
      exit 1;
    } else {
      tlwarn("Continuing anyway ...\n");
    }
  }
  if (!$ret) {
    tlwarn("Couldn't set up the necessary programs.\nInstallation of packages is not supported.\nPlease report to texlive\@tug.org.\n");
    if (defined($should_i_die) && $should_i_die) {
      finish(1);
    } else {
      tlwarn("Continuing anyway ...\n");
    }
  }
  # let cmd line options override the settings in localtlpdb
  my $loc = $localtlpdb->option_location;
  if (defined($loc)) {
    $location = $loc;
  }
  if (defined($opt_location)) {
    $location = $opt_location;
  }
  if (!defined($location)) {
    die("No installation source found, nor in the texlive.tlpdb nor on the cmd line.\nPlease specify one!");
  }
  if ($location =~ m/^ctan$/i) {
    $location = "$TeXLive::TLConfig::TeXLiveURL";
  }
  # we normalize the path only if it is
  # - neither a URL starting with http or ftp
  # - if we are on windows it does not start with Drive:
  if (! ( $location =~ m!^(http|ftp)://!i  ||
          (win32() && $location =~ m!^.:!) ) ) {
    # seems to be a local path, try to normalize it
    my $testloc = abs_path($location);
    # however, if we were given a url, that will get "normalized" to the
    # empty string, it not being a path.  Restore the original value if so.
    $location = $testloc if $testloc;
  }
}

sub action_gui {
  my ($guiscreen) = @_;
  my $perlbin = "perl";
  my $perlbinquote = "perl";
  my $perlscript = "$Master/texmf/scripts/texlive/tlmgrgui/tlmgrgui.pl";
  if ($^O=~/^MSWin(32|64)$/i) {
    $ENV{'PERL5LIB'} = "$Master/tlpkg/tlperl/lib";
    $perlbin = "$Master/tlpkg/tlperl/bin/perl.exe";
    $perlbinquote = "\"$Master/tlpkg/tlperl/bin/perl.exe\"";
    $perlbinquote =~ s!/!\\!g;
    $perlscript = "\"$perlscript\"";
    $perlscript =~ s!/!\\!g;
  }
  my @cmdline;
  push @cmdline, $perlbinquote, $perlscript;
  push @cmdline, "--lang", "$opt_gui_lang"
    if (defined($opt_gui_lang));
  push @cmdline, "--location", "$opt_location"
    if (defined($opt_location));
  push @cmdline, "--logfile", "$::LOGFILENAME"
    if (defined($::LOGFILENAME));
  push @cmdline, "-v" if ($::opt_verbosity > 0);
  push @cmdline, "-v" if ($::opt_verbosity > 1);
  push @cmdline, "-q" if ($::opt_quiet > 0);
  if (defined($guiscreen)) {
    if (($guiscreen eq "install") || ($guiscreen eq "update")) {
      push @cmdline, "--load";
    }
    push @cmdline, "--guiscreen", $guiscreen;
  }
  exec $perlbin @cmdline;
  die("Cannot execute the GUI script\n");
}

sub action_uninstall {
  if (win32()) {
    printf STDERR "Please use \"Add/Remove Programs\" from the Control Panel to removing TeX Live!\n";
    finish(1);
  }
  if ($opt_gui) {
    action_gui("uninstall");
  }
  my $force = 0;
  Getopt::Long::Configure(@getopt_configure_subopts);
  GetOptions("force" => \$force) or pod2usage(2);
  if (!$force) {
    print("If you answer yes here the whole TeX Live installation will be removed!\n");
    print "Remove TeX Live (y/N): ";
    my $yesno = <STDIN>;
    if ($yesno !~ m/^y(es)?$/i) {
      print "Ok, cancelling the removal!\n";
      finish(0);
    }
  }
  print ("Ok, removing the whole installation:\n");
  init_local_db;
  my $tlpdb = $localtlpdb;
  my $opt_symlinks = 0;
  my ($sys_bin,$sys_info,$sys_man);
  my ($texdir,$texmflocal,$texmfhome,$texmfsysvar);
  if ($tlpdb) {
    $sys_bin = $tlpdb->option_sys_bin;
    $sys_man = $tlpdb->option_sys_man;
    $sys_info= $tlpdb->option_sys_info;
    $opt_symlinks = $tlpdb->option_create_symlinks;
    $texdir = $Master;
    $texmfhome = `kpsewhich -var-value=TEXMFHOME`; chomp($texmfhome);
    $texmfsysvar = `kpsewhich -var-value=TEXMFSYSVAR`; chomp($texmfsysvar);
    $texmflocal = `kpsewhich -var-value=TEXMFLOCAL`; chomp($texmflocal);
  } else {
    die("cannot find tlpdb in $Master");
  }
  # remove the links missing
  if ($opt_symlinks) {
    my @files;
    if ((-d "$sys_bin") && (-w "$sys_bin")) {
      my $plat_bindir;
      if (-l "$sys_bin/pdftex") {
        my $fullpath = readlink("$sys_bin/pdftex");
        if ($fullpath =~ m;^$Master/bin/(.*)/[^/]*$;) {
          $plat_bindir = $1;
        }
      } else {
        warn "$sys_bin/pdftex not present or not a link, not removing any link of binaries!\n";
      }
      if ($plat_bindir) {
        @files = `ls "$Master/bin/$plat_bindir"`;
        chomp(@files);
        foreach my $f (@files) {
          next if (! -r "$sys_bin/$f");
          if ((-l "$sys_bin/$f") &&
              (readlink("$sys_bin/$f") =~ m;^$Master/bin/$plat_bindir/;)) {
            unlink("$sys_bin/$f");
          } else {
            warn ("not removing $sys_bin/$f, not a link or wrong destination!\n");
          }
        }
      }
      `rmdir "$sys_bin" 2>/dev/null`;
    } else {
      warn "destination of bin symlink $sys_bin not writable, no removal of links of bin files done!\n";
    }
    # info files
    if (-w  $sys_info) {
      @files = `ls "$Master/texmf/doc/info"`;
      chomp(@files);
      foreach my $f (@files) {
        next if (! -r "$sys_info/$f");
        if ((-l "$sys_info/$f") &&
            (readlink("$sys_info/$f") =~ m;^$Master/texmf/doc/info/;)) {
          unlink("$sys_info/$f");
        } else {
          warn ("not removing $sys_info/$f, not a link or wrong destination!\n");
        }
      }
      `rmdir "$sys_info" 2>/dev/null`;
    } else {
      warn "destination of info symlink $sys_info not writable, no removal of links of info files done!\n";
    }
    # man files
    if (-w  $sys_man) {
      my $foo = `(cd "$Master/texmf/doc/man" && echo *)`;
      my @mans = split ' ', $foo;
      chomp(@mans);
      foreach my $m (@mans) {
        my $mandir = "$Master/texmf/doc/man/$m";
        next unless -d $mandir;
        next unless -d "$sys_man/$m";
        @files = `ls "$mandir"`;
        chomp(@files);
        foreach my $f (@files) {
          next if (! -r "$sys_man/$m/$f");
          if ((-l "$sys_man/$m/$f") &&
              (readlink("$sys_man/$m/$f") =~ m;^$Master/texmf/doc/man/$m/;)) {
            unlink("$sys_man/$m/$f");
          } else {
            warn ("not removing $sys_man/$m/$f, not a link or wrong destination!\n");
          }
        }
        # ignore errors, it might be not empty
        `rmdir "$sys_man/$m" 2>/dev/null`;
      }
      `rmdir "$sys_man" 2>/dev/null`;
    } else {
      warn "destination of man symlink $sys_man not writable, no removal of links of man files done!\n";
    }
  }
  #
  # now do remove the rest
  system("rm", "-rf", "$texdir/texmf-dist");
  system("rm", "-rf", "$texdir/texmf-doc");
  system("rm", "-rf", "$texdir/texmf-var");
  system("rm", "-rf", "$texdir/texmf");
  system("rm", "-rf", "$texdir/tlpkg");
  system("rm", "-rf", "$texdir/bin");
  if (-d "$texdir/temp") {
    system("rmdir", "--ignore-fail-on-non-empty", "$texdir/temp");
  }
  unlink("$texdir/install-tl.log");
  # should we do that????
  system("rm", "-rf", "$texdir/texmf-config");
  system("rmdir", "--ignore-fail-on-non-empty", "$texdir");
}


sub action_check {
  my $svn = 0;
  Getopt::Long::Configure(@getopt_configure_subopts);
  GetOptions("use-svn" => \$svn) or pod2usage(2);
  my $what = shift @ARGV;
  $what || ($what = "all");
  init_local_db();
  my $ret = 0;
  if ($what =~ m/^all/i) {
    $ret ||= check_files($svn);
    $ret ||= check_collections($svn);
  } elsif ($what =~ m/^files/i) {
    $ret ||= check_files($svn);
  } elsif ($what =~ m/^collections/i) {
    $ret ||= check_collections($svn);
  } else {
    print "No idea how to check that: $what\n";
  }
  finish($ret);
}

#
# check file coverage, roughly equivalent to tlpkg/bin/check-file-coverage
#
sub check_files {
  my $svn = shift;
  my $ret = 0;
  my %filetopacks;
  my $Master = $localtlpdb->root;
  debug("Collecting all files of all packages\n");
  for my $p ($localtlpdb->list_packages()) {
    # ignore files in the installer
    next if ($p eq "00texlive.installer");
    my $tlp = $localtlpdb->get_package($p);
    for my $f ($tlp->all_files) {
      push @{$filetopacks{$f}}, $p;
    }
  }
  my @multiple = ();
  my @missing = ();
  debug("Checking for occurrences and existence of all files\n");
  for (keys %filetopacks) {
    push @missing, $_ if (! -r "$Master/$_");
    my @foo = @{$filetopacks{$_}};
    if ($#foo < 0) {
      warn "that shouldn't happen: $_\n";
    } elsif ($#foo > 0) {
      push @multiple, $_;
    }
  }
  if ($#multiple >= 0) {
    $ret = 1;
    print "Multiple included files (relative to $Master):\n";
    for (sort @multiple) {
      my @foo = @{$filetopacks{$_}};
      print "  $_ (@foo)\n";
    }
    print "\n";
  }
  if ($#missing >= 0) {
    $ret = 1;
    print "Files mentioned in tlpdb but missing (relative to $Master):\n";
    for my $m (@missing) {
      print "\t$m\n";
    }
    print "\n";
  }

  # if we are on Win32 or MacOS we return, they currently do not allow
  # find -wholename (missing find on w32, or bsd find on darwin).
  # we need the -use-svn version only for the check-file-coverage 
  # replacement anyway, so it will be used on tug, which is neither w32 nor
  # darwin.
  my $arch = $localtlpdb->option_platform;
  return $ret if ($arch eq "win32" || $arch eq "universal-darwin");

  #
  # do check that all files in the trees are covered
  #
  my @IgnorePatterns = qw!
    .mkisofsrc$ autorun.inf$
    support/ source/ setuptl/
    texmf-dist/ls-R$ texmf-doc/ls-R$ texmf/ls-R$
    tlpkg/tlpsrc/
    tlpkg/bin
    tlpkg/lib/ tlpkg/tests/ tlpkg/etc/ 
    tlpkg/texlive.tlpdb
    tlpkg/tlpobj
    texmf-var/
    texmf-config/
    texmf.cnf
    install-tl.log
    tlpkg/texlive.profile
    tlpkg/installer
    install-tl$
    install-tl.bat$
    install-tl.bat.manifest$
  !;
  my $tltree = TeXLive::TLTREE->new ("svnroot" => $Master);
  if ($svn) {
    debug("Initializine TLTREE from svn\n");
    $tltree->init_from_svn;
  } else {
    debug("Initializine TLTREE from find\n");
    $tltree->init_from_files;
  }
  my %tltreefiles = %{$tltree->{'_allfiles'}};
  my @tlpdbfiles = keys %filetopacks;
  my @nohit;
  for my $f (keys %tltreefiles) {
    # if it is mentioned in the tlpdb or is ignored it is considered
    # as covered, thus, otherwise we push it onto the nothit list
    if (!defined($filetopacks{$f})) {
      my $ignored = 0;
      for my $p (@IgnorePatterns) {
        if ($f =~ m/^$p/) {
          $ignored = 1;
          last;
        }
      }
      if (!$ignored) {
        push @nohit, $f;
      }
    }
  }
  if (@nohit) {
    $ret = 1;
    print "Files present but not covered (relative to $Master):\n";
    for my $f (sort @nohit) {
      print "  $f\n";
    }
    print "\n";
  }
  return($ret);
}

#
# check collections
#
sub check_collections {
  my @missing = ();
  for my $p ($localtlpdb->collections()) {
    my $col = $localtlpdb->get_package($p);
    for my $d ($col->depends) {
      push @missing, "$d ($p)" if (!defined($localtlpdb->get_package($d)));
    }
  }
  return(0) if (!@missing);
  print "Packages listed in collections but not present:\n";
  for my $m (@missing) {
    print "\t$m\n";
  }
  print "\n";
}


#
# initialize the global $tlmediasrc object, or die.
# uses the global $location.
#
sub init_tlmedia {
  if ($location =~ m/^($TeXLiveServerURL|ctan$)/) {
    $location = give_ctan_mirror();
  }
  info("tlmgr: installation location $location\n");
  # $tlmediasrc is a global variable
  $tlmediasrc = TeXLive::TLMedia->new($location);
  die($loadmediasrcerror . $location) unless defined($tlmediasrc);
}

#
# the logpackage function
# if the packagelog variable is set then write to PACKAGELOG filehandle
#
sub logpackage {
  if ($packagelogfile) {
    $packagelogged++;
    my $tim = localtime();
    print PACKAGELOG "[$tim] @_\n";
  }
}

#
# finish # evaluates only the -pause option, and then exits.
sub finish {
  my ($ret) = @_;

  if ($ret > 0) {
    print "tlmgr: exiting unsuccessfully (status $ret).\n";
  }
  
  if ($opt_pause) {
    print "Please press <ENTER> to exit the program.\n";
    <STDIN>;
  }

  exit($ret);
}

#  RECREATE TLPDB
#
sub action_recreate_tlpdb {
  my $opt_arch;
  Getopt::Long::Configure(@getopt_configure_subopts);
  GetOptions("arch=s"        => \$opt_arch) or pod2usage(2);
  my $tlpdb = TeXLive::TLPDB->new;
  $tlpdb->root($Master);
  my $inst = TeXLive::TLPOBJ->new;
  $inst->name("00texlive-installation.config");
  $inst->category("TLCore");
  my @deps;
  push @deps, "location:$TeXLive::TLConfig::TeXLiveURL";
  push @deps, "opt_create_formats:0";
  push @deps, "opt_create_symlinks:0";
  push @deps, "opt_sys_bin:/usr/local/bin";
  push @deps, "opt_sys_info:/usr/local/info";
  push @deps, "opt_sys_man:/usr/local/man";
  push @deps, "opt_install_docfiles:0";
  push @deps, "opt_install_srcfiles:0";
  # find list of available archs
  my @archs;
  opendir (DIR, "$Master/bin") || die "opendir($Master/bin) failed: $!";
  my @dirents = readdir (DIR);
  closedir (DIR) || warn "closedir($Master/bin) failed: $!";
  for my $dirent (@dirents) {
    next if $dirent eq ".";
    next if $dirent eq "..";
    next unless -d "$Master/bin/$dirent";
    if (-r "$Master/bin/$dirent/kpsewhich" || -r "$Master/bin/$dirent/kpsewhich.exe") {
      push @archs, $dirent;
      debug("Skipping directory $Master/bin/$dirent, no kpsewhich there\n");
    }
  }
  push @deps, "available_architectures:" . join(" ",@archs);
  # we have to find out the default arch
  # if there is only one dir in $Master/bin then we are settled,
  # otherwise we expect the user to pass a correct arch string
  if ($^O =~ /^MSWin(32|64)$/i) {
    push @deps, "platform:win32";
  } else {
    if ($#archs == 0) {
      # only one arch available, fine, use it as default
      push @deps, "platform:$archs[0]";
    } else {
      if (defined($opt_arch)) {
        if (member($opt_arch, @archs)) {
          push @deps, "platform:" . $opt_arch;
        } else {
          tlwarn("The architecture you passed in with --arch is not present in $Master/bin\n");
          tlwarn("Please specify one from the available ones: @archs\n");
          exit(1);
        }
      } else {
        tlwarn("More than one architecture available: @archs\n");
        tlwarn("Please pass one as the default you are running on with --arch=...\n");
        exit(1);
      }
    }
  }
  $inst->depends(@deps);
  # now we have all the stuff for 00texlive-installation.config done
  $tlpdb->add_tlpobj($inst);
  # add the other stuff in $Master/tlpkg/tlpobj/*.tlpobj
  # we can ignore *.{source,doc}.tlpobj because they are already
  # included in the *.tlpobj parent one at install time
  # (TODO: we should actually REMOVE the *.{source,doc}.tlpobj files
  #        at package install time)
  opendir (DIR, "$Master/tlpkg/tlpobj") or die "opendir($Master/tlpkg/tlpobj) failed: $!";
  my @tlps = readdir(DIR);
  closedir (DIR) || warn "closedir($Master/tlpkg/tlpobj) failed: $!";
  for my $t (@tlps) {
    next if -d $t; # also does . and ..
    next if ($t !~ m/\.tlpobj$/i);
    # ignore .source and .doc tlpobjs
    next if ($t =~ m/\.(source|doc)\.tlpobj$/i);
    my $tlp = TeXLive::TLPOBJ->new;
    $tlp->from_file("$Master/tlpkg/tlpobj/$t");
    $tlpdb->add_tlpobj($tlp);
  }
  # writeout the re-created tlpdb to stdout
  $tlpdb->writeout;
  return;
}

# clear the backup dir for $pkg and keep only $autobackup packages
# mind that with $autobackup == 0 all packages are cleared
sub clear_old_backups
{
  my ($pkg, $opt_backupdir, $autobackup, $opt_dry) = @_;

  my $dryrun = 0;
  $dryrun = 1 if ($opt_dry);
  # keep arbitrary many backups
  return if ($autobackup == -1);
 
  opendir (DIR, $opt_backupdir) || die "opendir($opt_backupdir) failed: $!";
  my @dirents = readdir (DIR);
  closedir (DIR) || warn "closedir($opt_backupdir) failed: $!";
  my @backups;
  for my $dirent (@dirents) {
    next if (-d $dirent);
    next if ($dirent !~ m/^$pkg\.r([0-9]+)\.tar\.lzma$/);
    push @backups, $1;
  }
  my $i = 1;
  for my $e (reverse sort {$a <=> $b} @backups) {
    if ($i > $autobackup) {
      info ("Removing backup $opt_backupdir/$pkg.r$e.tar.lzma\n");
      unlink("$opt_backupdir/$pkg.r$e.tar.lzma") unless $dryrun;
    }
    $i++;
  }
}

#
# check for updates to tlcritical packages
#
sub check_for_critical_updates
{
  my ($localtlpdb, $mediatlpdb) = @_;

  my $criticalupdate = 0;
  my @critical = $localtlpdb->expand_dependencies("-no-collections",
    $localtlpdb, @CriticalPackagesList);
  for my $pkg (sort @critical) {
    my $tlp = $localtlpdb->get_package($pkg);
    if (!defined($tlp)) {
      # that should not happen, we expanded in the localtlpdb so why 
      # should it not be present, any anyway, those are so fundamental
      # so they have to be there
      tlwarn("Fundamental package $pkg not present, that is sooo bad.\n");
      die "Serious error, $pkg not found";
    }
    my $localrev = $tlp->revision;
    my $mtlp = $mediatlpdb->get_package($pkg);
    if (!defined($mtlp)) {
      tlwarn("Very suprising, $pkg is not present in the remote tlpdb.\n");
      next;
    }
    my $remoterev = $mtlp->revision;
    if ($remoterev > $localrev) {
      $criticalupdate = 1;
      last;
    }
  }
  if ($criticalupdate) {
    tlwarn("Updates for tlmgr itself are present.\n");
    tlwarn("==========================================================\n");
    tlwarn("Please update the package bin-texlive and texlive.infra first,");
    tlwarn("e.g., by calling\n");
    tlwarn("  tlmgr update bin-texlive texlive.infra\n");
    tlwarn("Or get the latest updater from\nfor Unix-ish systems:\n");
    tlwarn("  $TeXLiveURL/update-tlmgr-latest.sh\n");
    tlwarn("for Windows systems:\n");
    tlwarn("  $TeXLiveURL/update-tlmgr-latest.exe\n");
    tlwarn("Then continue with other updates.\n");
    tlwarn("==========================================================\n");
  }
  return($criticalupdate);
}


#
# return all the directories from which all content will be removed
#
# idea:
# - create a hashes by_dir listing all files that should be removed
#   by directory, i.e., key = dir, value is list of files
# - for each of the dirs (keys of by_dir and ordered deepest first)
#   check that all actually contained files are removed
#   and all the contained dirs are in the removal list. If this is the
#   case put that directory into the removal list
# - return this removal list
#
sub removed_dirs
{
  my (@files) = @_;
  my %removed_dirs;
  my %by_dir;

  # construct hash of all directories mentioned, values are lists of the
  # files/dirs in that directory.
  for my $f (@files) {
    # what should we do with not existing entries????
    next if (! -r "$f");
    my $abs_f = abs_path ($f);
    if (!$abs_f) {
      warn ("oops, no abs_path($f) from " . `pwd`);
      next;
    }
    (my $d = $abs_f) =~ s,/[^/]*$,,;
    my @a = exists $by_dir{$d} ? @{$by_dir{$d}} : ();
    push (@a, $abs_f);
    $by_dir{$d} = \@a;
  }

  # for each of our directories, see if we are removing everything in
  # the directory.  if so, return the directory; else return the
  # individual files.
  for my $d (reverse sort keys %by_dir) {
    opendir (DIR, $d) || die "opendir($d) failed: $!";
    my @dirents = readdir (DIR);
    closedir (DIR) || warn "closedir($d) failed: $!";

    # initialize test hash with all the files we saw in this dir.
    # (These idioms are due to "Finding Elements in One Array and Not
    # Another" in the Perl Cookbook.)
    my %seen;
    my @rmfiles = @{$by_dir{$d}};
    @seen{@rmfiles} = ();

    # see if everything is the same.
    my $cleandir = 1;
    for my $dirent (@dirents) {
      next if $dirent =~ /^\.(\.|svn)?$/;  # ignore . .. .svn
      my $item = "$d/$dirent";  # prepend directory for comparison
      if (
           ((-d $item) && (defined($removed_dirs{$item})))
           ||
           (exists $seen{$item})
         ) {
        # do nothing
      } else {
        $cleandir = 0;
        last;
      }
    }
    if ($cleandir) {
      $removed_dirs{$d} = 1;
    }
  }
  return keys %removed_dirs;
}

__END__

=head1 NAME

tlmgr - the TeX Live Manager

=head1 SYNOPSIS

tlmgr [I<option>]... I<action> [I<option>]... [I<operand>]...

=head1 DESCRIPTION

B<tlmgr> manages an existing TeX Live installation, both packages and
configuration options.  It performs many of the same actions as
B<texconfig>(1), and more besides.  (C<texconfig> continues to be
included and supported, but C<tlmgr> is now preferred.)

The most up-to-date version of this documentation is available at
L<http://tug.org/texlive/tlmgr.html>, along with procedures for updating
tlmgr itself, disaster recovery when it's broken, and test versions.

=head1 OPTIONS

The following options to C<tlmgr> have to be given I<before> you specify
the main action to perform.  In all cases, C<-->I<option> and
C<->I<option> are equivalent, and an C<=> is optional between an option
name and its value.

=over 4

=item B<--location> I<location>

Specifies the location from which packages should be installed or
updated, overriding the location found in the installation's TeX Live
Package Database (TLPDB).

=item B<--gui> [I<action>]

You can give this option together with an action to be brought directly
into the respective screen of the GUI.  For example, running

  tlmgr --gui update

starts you directly at the update screen.

=item B<--gui-lang> I<llcode>

Normally the GUI tries to deduce your language from the environment (on
Windows via the registry, on Unix via C<LC_MESSAGES>). If that fails you
can select a different language by giving this option a two-letter
language code.

=item B<--package-logfile> I<file>

B<tlmgr> logs all package actions (install, remove, update, failed
updates, failed restores) to a separate log file, by default
C<TEXMFSYSVAR/web2c/tlmgr.log>. This option allows you to select a
different file for that.  This is separate from normal logging; for
that, see the option C<-v> below, and TeXLive::TLUtils.

=item B<--pause>

This option make B<tlmgr> wait for user input before exiting.  Useful on
Windows to avoid command windows disappearing.

=back

The standard options for TeX Live programs are also accepted:
C<--help/-h/-?>, C<--version>, C<-q> (no informational messages), C<-v>
(debugging messages, can be repeated).  For the details about these, see
the TeXLive::TLUtils documentation.

The C<--version> option shows version information about the TeX Live
release as well as the C<tlmgr> script itself.

=head1 ACTIONS

=head2 help

Gives this help information (same as C<--help>).

=head2 version

Gives version information (same as C<--version>).

=head2 gui

Start the graphical user interface.


=head2 install [I<option>]... I<pkg>...

Install each I<pkg> given on the command line. By default this installs
all packages on which the given I<pkg>s are dependent, also.  Options:

=over 4

=item B<--reinstall>

Reinstall a package (including dependencies for collections) even if it
seems to be already installed (i.e, is present in the TLPDB).  This is
useful to recover from accidental removal of files in the hierarchy.

When re-installing, only dependencies on normal packages are followed
(not those of category Scheme or Collection).

=item B<--no-depends>

Do not install dependencies.  (By default, installing a package ensures
that all dependencies of this package are fulfilled.)

=item B<--no-depends-at-all>

When you install a package which ships binary files the respective binary
package will also be installed. (So for package bin-foobar also the package
bin-foobar.i386-linux will be installed on an i386-linux system.)
This switch supresses this behaviour, and also implies C<--no-depends>.
Don't use it unless you are sure of what you are doing.

=item B<--dry-run>

Nothing is actually installed; instead, the actions to be performed are
written to the terminal.

=item B<--force>

If updates to the tlmgr itself (and the underlying infrastructure) are 
present tlmgr will bail out and not perform the installation unless this option
is given.

=back


=head2 update [I<option>]... [I<pkg>]...

Updates the packages given as arguments to the latest version available
at the installation source.  Either C<--all> or at least one I<pkg> name
must be specified.  Options:

=over 4

=item B<--all>

Update all installed packages.  For packages contained in an installed
collection, also install new packages and remove deleted packages in
those collections.  Packages not contained in an installed collection
are not considered for addition or removal.

More precisely, if both the server and the local installation have a
collection C, and C on the server contains a package A that is not
present locally, A will be added.  Conversely, if the local collection C
contains a package B, but B is no longer in the server's C, then B will
be deleted.

=item B<--list>

Concisely list the packages which would be updated, newly installed, or
removed, without actually changing anything.

=item B<--dry-run>

Nothing is actually installed; instead, the actions to be performed are
written to the terminal.  This is a more detailed report than C<--list>.

=item B<--force>

If updates to tlmgr itself (that is, the infrastructure packages) are
present, tlmgr will not perform the update unless this option (or
C<--list>) is given.

=item B<--no-remove>

Under normal circumstances tlmgr tries to remove packages which have
disappeared on the server when called with C<--all>, as described
above. This prevents any such removals.

=item B<--backup> and B<--backupdir> I<directory>

These two options control the creation of backups of packages before an
update is started; that is, the backup is of the package as it's
installed.  If neither of the two are given, no backup package will be
saved. If B<--backupdir> is given and specifies a writable directory
then a backup will be made in that location. If only B<--backup> is
given, then a backup will be made to the directory previously set via
the C<option> action (see below). If both are given then a backup will
be made to the specified I<directory>.

You can set options via the C<option> action to automatically create
backups for all packages, and/or keep only a certain number of
backups. Please see the C<option> action for details. 

C<tlmgr> always makes a temporary backup when updating packages, in case
of download or other failure during an update.  The purpose of this
B<--backup> option is to allow you to save a persistent backup in case
the actual I<content> of the update causes problems, e.g., introduces an
incompatibility.

The C<restore> action explains how to restore from a backup.

=item B<--no-depends>

If you call for updating a package normally all depending packages
will also be checked for updates and updated if necessary. This switch
supresses this behaviour.

=item B<--no-depends-at-all>

By default, when you update a package which ships binary files the
respective binary package will also be updated.  That is, for an update
of a package C<foo>, the package C<foobar.i386-linux> will also be
updated if the i386-linux platform is installed.  This option suppresses
this behaviour, and implies C<--no-depends>.  Don't use it unless you
are sure of what you are doing.

=back

If the package on the server is older than the package already installed
(e.g., if the selected mirror is out of date), C<tlmgr> does not
downgrade.  Also, packages for uninstalled platforms are not installed.


=head2 backup [--clean[=I<N>]] [--backupdir I<dir>] [--all] [I<pkg>]...

If the B<--clean> option is not specified, this action makes a backup of
the given packages, or all packages given C<--all>. These backups are
saved to the value of B<--backupdir> option if that is an existing and
writable directory; if B<--backupdir> is not given, the C<backupdir>
option setting in the TLPDB is used, if present.  If both are missing,
no backups are made.

If the B<--clean> option is specified, backups are cleaned (pruned)
instead of made.  If the value for the B<--clean> switch is not given,
the value of the C<autobackup> option is used. If both are missing,
an error is issued.  For the details of backup cleaning, see the
C<option> action below.

Options:

=over 4

=item B<--backupdir> I<directory>

The I<directory> argument is required and must specify an existing
directory where backups are to be placed.

=item B<--all>

Make a backup of all packages in the TeX Live installation.  This will
take quite a lot of space and time.

=item B<--clean>[=I<N>]

Instead of making backups, prune the backup directory of old backups.

=item B<--dry-run>

Nothing is actually backed up or removed; instead, the actions to be 
performed are written to the terminal. 

=back


=head2 restore --backupdir I<dir> [I<pkg> [I<rev>]

Restore a package from a previously-made backup.

If neither I<pkg> nor I<rev> are given, list the available backup
revisions for all packages.

With I<pkg> given but no I<rev>, list all available backup revisions of
I<pkg>.

With both I<pkg> and I<rev>, tries to restore the package from the
specified backup.

Options:

=over 4

=item B<--dry-run>

Nothing is actually restored; instead, the actions to be performed are
written to the terminal.

=item B<--backupdir> I<directory>

Specify the directory where the backups are to be found.

=back


=head2 remove [I<option>]... I<pkg>...

Remove each I<pkg> specified.  Removing a collection removes all package
dependencies, but not collection dependencies, in that collection
(unless C<--no-depends> is specified).  However, when removing a
package, dependencies are never removed.  Options:

=over 4

=item B<--no-depends>

Do not remove dependent packages.

=item B<--no-depends-at-all>

See above under B<action> (and beware).

=item B<--force>

By default, removal of a package or collection that is a dependency of
another collection or scheme is not allowed.  With this option, the
package will be removed unconditionally.  Use with care.

=item B<--dry-run>

Nothing is actually removed; instead, the actions to be performed are
written to the terminal.

=back


=head2 option

=over 4

=item B<option [show]>

=item B<option I<key> [I<value>]>

=back

The first form shows the global TeX Live settings currently saved in the
TLPDB.

In the second form, if I<value> is not given, the setting for I<key> is
displayed.  If I<value> is present, I<key> is set to I<value>.

Possible values for I<key> are:
 C<location> (default installation location),
 C<formats> (create formats at installation time),
 C<docfiles> (install documentation files),
 C<srcfiles> (install source files),
 C<backupdir> (default directory for backups),
 C<autobackup> (number of backups to keep).

Perhaps the most common use of C<option> is if you originally installed from
DVD, and want to permanently change the installation to get further
updates from the Internet.  To do this, you can run

 tlmgr option location http://mirror.ctan.org/systems/texlive/tlnet/YYYY

where YYYY is the TeX Live release year.

The two options C<autobackup> and C<backupdir> determine defaults for
the C<update>, C<backup> and C<restore> actions.  These three actions
need a directory to write to or read from the backups.  If
C<--backupdir> is not specified on the command line, the C<backupdir>
option value is used (if set).

The C<autobackup> option (de)activates the automatic generation of
backups. Its value is an integer.  If C<autobackup> is C<-1>, backups
will not be removed by default.  If C<autobackup> is 0 or positive, it
specifies the number of backups to be kept.  Thus, backups are disabled
with 0 as the values.

In the C<--clean> mode of the C<backup> action this option also
specifies the number to be kept.


=head2 paper

=over 4

=item B<paper a4>

=item B<paper letter>

=item B<[xdvi|dvips|pdftex|dvipdfm|dvipdfmx|context] paper [help|I<papersize>|--list]>

=back

Configures the system wide paper settings, either for all programs at
once (first two forms), or just for the specified program (third
form). The third form with C<--list> outputs all known papersizes for the
specified program.


=head2 arch list|add I<arch>...

C<arch list> lists the TeX Live names of all the architectures
(C<i386-linux>, ...) available at the default install location.

C<arch add> I<arch> adds the executables for each given architecture
I<arch> to the installation.  Options:

=over 4

=item B<--dry-run>

Nothing is actually installed; instead, the actions to be performed are
written to the terminal.

=back


=head2 search [I<option>]... I<what>

By default searches the names, short and long descriptions of all
locally installed packages for the given argument (interpreted as
regexp).  Options:

=over 4

=item B<--file>

List all filenames containing I<what>.

=item B<--global>

Search the TeX Live Database of the installation medium, instead of the
local installation.

=back


=head2 show [--list] I<pkg>...

Shows information about I<pkg>: the name, category, installation status,
short and long description.  Searches in the remote installation source
for the package if it is not locally installed.

If the option B<--list> is given the list of contained files is also
shown, including those for architecture specific dependencies.


=head2 list [collections|schemes|I<pkg>...]

With no argument, lists all packages available at the default install
location, prefixing those already installed with C<i>.

With the single word C<collections> or C<schemes> as the argument, lists
the request type.

With anything else as arguments, operates as the C<show> action.


=head2 check [I<option>]... [files|collections|all]

Executes one (or all) check(s) on the consistency of the installation.

=over 4

=item B<files>

Checks that all files listed in the TeX Live Database (C<texlive.tlpdb>)
are actually present, and lists those missing.

=item B<collections>

Lists those packages which occur as dependencies in an installed collections,
but are themselves not installed.  Options:

=back

=over 4

=item B<--use-svn>

Use svn status instead of listing the files, for checking the
development repository.

=back


=head2 uninstall

Uninstalls the entire TeX Live installation.  Options:

=over 4

=item B<--force>

Do not ask for confirmation, remove immediately.

=back


=head2 generate

=over 4

=item B<generate language>

=item B<generate language.dat>

=item B<generate language.def>

=item B<generate fmtutil>

=item B<generate updmap>

=back

The I<generate> action overwrites any manual changes made in the
respective files: it recreates them from scratch.

For fmtutil and the language files, this is normal, and both the TeX
Live installer and C<tlmgr> routinely call I<generate> for them.

For updmap, however, neither the installer nor C<tlmgr> use I<generate>,
because the result would be to disable all maps which have been manually
installed via C<updmap-sys --enable>, e.g., for proprietary or local
fonts.  Only the changes in the C<--localcfg> file mentioned below are
incorporated by I<generate>.

On the other hand, if you only use the fonts and font packages within
TeX Live, there is nothing wrong with using I<generate updmap>.  Indeed,
we use it to generate the C<updmap.cfg> file that is maintained in the
live source repository.

In more detail: I<generate> remakes any of the four config files
C<language.dat>, C<language.def>, C<fmtutil.cnf>, and C<updmap.cfg> from
the information present in the local TLPDB. If the files
C<language-local.dat>, C<language-local.def>, C<fmtutil-local.cnf>, or
C<updmap-local.cfg> are present under C<TEXMFLOCAL> in the respective
directories, their contents will be simply merged into the final files,
with no error checking of any kind.

The form C<generate language> recreates both the C<language.dat> and the
C<language.def> files, while the forms with extension only recreates
the given file.

Options:

=over 4

=item B<--dest> I<output file>

specifies the output file (defaults to the respective location in
C<TEXMFSYSVAR>).  If B<--dest> is given to C<generate language>, its
value will be used for the C<language.dat> output, and C<.def> will be
appended to the value for the name of the C<language.def> output file.
(This is just to avoid overwriting; if you want a specific name for each
output file, we recommend invoking C<tlmgr> twice.)

=item B<--localcfg> I<local conf file>

specifies the (optional) local additions (defaults to the respective
location in C<TEXMFSYSVAR>).

=back

The respective locations are as follows:
  C<tex/generic/config/language.dat> (and C<language-local.dat>)
  C<tex/generic/config/language.def> (and C<language-local.def>)
  C<web2c/fmtutil.cnf> (and C<fmtutil-local.cnf>)
  C<web2c/updmap.cfg> (and C<updmap-local.cfg>)


=head1 AUTHORS AND COPYRIGHT

This script and its documentation were written for the TeX Live
distribution (L<http://tug.org/texlive>) and both are licensed under the
GNU General Public License Version 2 or later.

=cut

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