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#!/usr/bin/env perl
# $Id$
# Copyright 2008-2018 Norbert Preining
# This file is licensed under the GNU General Public License version 2
# or any later version.
# 
# Updates/fixes the sizes and md5sums of all containers in a tlpdb.

BEGIN {
  $vc_id = '$Id$';
  $^W = 1;
  ($mydir = $0) =~ s,/[^/]*$,,;
  unshift (@INC, "$mydir/..");
}

use strict;
use TeXLive::TLConfig;
use TeXLive::TLCrypto;
use TeXLive::TLPOBJ;
use TeXLive::TLPDB;
use TeXLive::TLUtils;
use Getopt::Long;
use Pod::Usage;
use File::Path;

our ($mydir, $vc_id);
my $opt_dry_run = 0;
my $opt_location = ".";
my $opt_nosetup = 0;
my $opt_version = 0;
my $opt_help = 0;

TeXLive::TLUtils::process_logging_options();
GetOptions(
  "dry-run|n"   => \$opt_dry_run, 
  "location=s"  => \$opt_location, 
  "no-setup"    => \$opt_nosetup,
  "version"	=> \$opt_version,
  "help|?"      => \$opt_help) or pod2usage(1);

pod2usage("-exitstatus" => 0, "-verbose" => 2) if $opt_help;
if ($opt_version) { print "$vc_id\n"; exit 0; } 

exit (&main());


sub main {
  chomp(my $Master = `cd $mydir/../.. && pwd`);

  # check that we have a target db.
  if (! -r "$opt_location/tlpkg/texlive.tlpdb") {
    die "no file $opt_location/tlpkg/texlive.tlpdb";
  }

  # get source db, same hierarchy from which we are being run.
  my $tlpdb = TeXLive::TLPDB->new("root" => $opt_location);
  die "cannot load tlpdb from root=$opt_location" unless defined($tlpdb);

  if (! TeXLive::TLCrypto::setup_checksum_method()) {
    die "TLCrypto::setup_checksum_method() failed";
  }

  # get configuration of package splitting
  my $srcsplit = $tlpdb->config_src_container;
  my $docsplit = $tlpdb->config_doc_container;
  my $format = $tlpdb->config_container_format;

  my $opt_containerdir = "$opt_location/$TeXLive::TLConfig::Archive";

  # set up the programs.
  if ($opt_nosetup) {
    # do a minimal setup
    $::progs{'xz'} = "xz";
    $::progs{'tar'} = "tar";
  } else {
    # do a full setup
    my $ret = &TeXLive::TLUtils::setup_programs("$Master/tlpkg/installer");
    if (!$ret) {
      tlwarn("$0: binaries could not be set up, aborting.\n");
      exit 1;
    }
  }

  # get list of packages.
  for my $pkg (sort $tlpdb->list_packages) {
    next if $pkg =~ /00texlive/;
    my $obj = $tlpdb->get_package ($pkg);
    die "no package $pkg in master $Master, goodbye"
      if ! $obj;

    debug("doing $pkg containers ...\n");
    my $newobj = do_containers($obj, $srcsplit, $docsplit);
    # replace with the new one with checksum and size changed, if needed
    $tlpdb->add_tlpobj($newobj || $obj);
  }
  if (! $opt_dry_run) {
    $tlpdb->save;
    xsystem("xz --force -k -z $opt_location/tlpkg/texlive.tlpdb");
  }
  
  return 0;
}


sub do_containers {
  my ($obj, $dosrc, $dodoc) = @_;
  my $name = $obj->name;
  my $csize = $obj->containersize;
  my $csum = $obj->containerchecksum;
  return undef if $csize && $csum;
  info ("updating $name ($csize, no checksum)\n");
  
  my $fbase = "$opt_location/archive/" . $obj->name;
  my ($a, $b) = do_size_checksum ("${fbase}.tar.xz");
  $obj->containersize($a);
  $obj->containerchecksum($b);
  #
  # if no main checksum, almost certainly need to update src/doc too.
  if ($dosrc && $obj->srcfiles) {
    ($a, $b) = do_size_checksum ("${fbase}.source.tar.xz");
    $obj->srccontainersize($a);
    $obj->srccontainerchecksum($b);
  }
  #
  if ($dodoc && $obj->docfiles) {
    ($a, $b) = do_size_checksum ("${fbase}.doc.tar.xz");
    $obj->doccontainersize($a);
    $obj->doccontainerchecksum($b);
  }
  return $obj;
}

# computation of size/checksum values.
# 
sub do_size_checksum{
  my $f = shift;
  my $size = (stat $f)[7];
  my $md = TeXLive::TLCrypto::tlchecksum($f);
  return($size, $md);
}

__END__

=head1 NAME

tl-fix-container-infos - updates or adds size and checksum for containers

=head1 SYNOPSIS

tl-fix-container-infos [I<option>]...

=head1 OPTIONS

=over 4

=item B<-dry-run|-n>

Don't write anything.

=item B<-location> I</container/dir>

The directory of containers to be updated, requiring
I</container/dir>C</tlpkg/texlive.tlpdb>, usually with a previous set of
containers to be compared against; default is C<.>.

=item B<-no-setup>

Does not try to setup the various programs, but uses I<xz> and I<tar>
from the current path.

=item B<--help>

Display this documentation and exit.

=item B<--version>

Display version information and exit.

=back

The standard options B<-q>, B<-v>, and B<-logfile>=I<file> are also
accepted; see the C<process_logging_options> function in
L<TeXLive::TLUtils> for details.

The format of the containers and the splitting of source and
documentation files are controlled by the TLPDB options in the
pseudo-package C<00texlive.config>.  See L<TeXLive::TLPDB>.

=head1 DESCRIPTION

This program adds or updates {,src,doc}container{size,checksum}
directive entries for packages found in the TL location.  Only packages
without a previous C<containerchecksum> entry are updated.

=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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