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#!/usr/bin/env perl
# Copyright 2008-2016 Norbert Preining
# This file is licensed under the GNU General Public License version 2
# or any later version.
# 
# checks the consistency of a tlnet tlpkg/texlive.tlpdb and the .tlpobj
# included in the packages. Takes quite some time.

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

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

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

TeXLive::TLUtils::process_logging_options();
GetOptions(
  "location=s"  => \$opt_location, 
  "no-setup"    => \$opt_nosetup,
  "filelists"   => \$opt_filelists,
  "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 $mydir/../.. && pwd`);
  # set up the programs ...
  if ($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 == -1) {
      tlwarn("no binary of xzdec for $::_platform_ detected, aborting.\n");
      exit 1;
    }
    if (!$ret) {
      tlwarn("binaries could not be set up, aborting.\n");
      exit 1;
    }
  }

  # get our db, same hierarchy from which we are being run.
  my $tlpdb = TeXLive::TLPDB->new("root" => $opt_location, 'verify' => 1);
  die "Cannot init tlpdb from $opt_location ..." unless defined($tlpdb);
  my $tempbase = "$opt_location/temp";
  if (! -d $tempbase) {
    mkdir($tempbase) or die "Cannot create $tempbase directory: $!";
  }
  my $temp = `mktemp -d -p \"$tempbase\"`;
  chomp($temp);
  die "Cannot create temporary directory in $tempbase: $!" if (! -d $temp);
  my @notlpobj;
  my @revisionerror;
  my @missingsrccontainer;
  my @missingdoccontainer;
  my @sizeerror;
  my %filedifferrors;
  foreach my $pkg ($tlpdb->list_packages()) {
    next if ($pkg =~ m/^00texlive/);
    debug("working on $pkg\n");
    my $cont = "$opt_location/archive/$pkg.tar.xz";
    my $srccont = "$opt_location/archive/$pkg.source.tar.xz";
    my $doccont = "$opt_location/archive/$pkg.doc.tar.xz";
    my $tlpdbtlpobj = $tlpdb->get_package($pkg);
    my $dodoc = ($tlpdb->config_doc_container && $tlpdbtlpobj->docfiles);
    my $dosrc = ($tlpdb->config_src_container && $tlpdbtlpobj->srcfiles);
    if ($opt_filelists) {
      system("cat $cont | $::progs{xzdec} | $::progs{tar} -C \"$temp\" -xf - ");
    } else {
      system("cat $cont | $::progs{xzdec} | $::progs{tar} -C \"$temp\" -xf - tlpkg/tlpobj");
    }
    if (! -r "$temp/tlpkg/tlpobj/$pkg.tlpobj") {
      debug("ERROR: no tlpobj\n");
      push @notlpobj, $pkg;
    } else {
      my $tartlpobj = TeXLive::TLPOBJ->new;
      $tartlpobj->from_file("$temp/tlpkg/tlpobj/$pkg.tlpobj");
      die "Cannot load tlpobj from $temp/$pkg.tlpobj: $!" unless defined($tartlpobj);
      # get the src and doc containers unpacked and add the respective files
      if ($dosrc) {
        system("cat $srccont | $::progs{xzdec} | $::progs{tar} -C \"$temp\" -xf - tlpkg/tlpobj");
        if (! -r "$temp/tlpkg/tlpobj/$pkg.source.tlpobj") {
          push @missingsrccontainer, $pkg;
          debug("ERROR: missing src container\n");
        } else {
          my $srctlpobj = TeXLive::TLPOBJ->new;
          $srctlpobj->from_file("$temp/tlpkg/tlpobj/$pkg.source.tlpobj");
          die "Cannot load tlpobj from $temp/$pkg.source.tlpobj: $!" unless defined($srctlpobj);
          $tartlpobj->add_srcfiles($srctlpobj->srcfiles);
        }
      }
      if ($dodoc) {
        system("cat $doccont | $::progs{xzdec} | $::progs{tar} -C \"$temp\" -xf - tlpkg/tlpobj");
        if (! -r "$temp/tlpkg/tlpobj/$pkg.doc.tlpobj") {
          push @missingdoccontainer, $pkg;
          debug("ERROR: missing doc container\n");
        } else {
          my $doctlpobj = TeXLive::TLPOBJ->new;
          $doctlpobj->from_file("$temp/tlpkg/tlpobj/$pkg.doc.tlpobj");
          die "Cannot load tlpobj from $temp/$pkg.doc.tlpobj: $!" unless defined($doctlpobj);
          $tartlpobj->add_docfiles($doctlpobj->docfiles);
        }
      }
      # check the revisions
      if ($tlpdbtlpobj->revision != $tartlpobj->revision) {
        push @revisionerror, "$pkg (tlpdb: " . $tlpdbtlpobj->revision . ", tar: " . $tartlpobj->revision . ")";
      }
      # check that the files are the same
      my @a = $tlpdbtlpobj->all_files;
      my @b = $tartlpobj->all_files;
      my @ret = compare_lists(\@a, \@b);
      push @{$filedifferrors{$pkg}}, @ret if @ret;
      # check the file sizes and checksums
      my $c = check_size_checksum($cont, $tlpdbtlpobj->containersize, 
                                         $tlpdbtlpobj->containerchecksum);
      push @sizeerror, "$pkg (" . ($c == 1 ? "size" : "checksum") . ")"
        if ($c > 0);
      debug("ERROR: size/checksum error main\n") if ($c > 0);
      if ($dodoc) {
        my $c = check_size_checksum($doccont, $tlpdbtlpobj->doccontainersize, 
                                              $tlpdbtlpobj->doccontainerchecksum);
        push @sizeerror, "$pkg.doc (" . ($c == 1 ? "size" : "checksum") . ")"
          if ($c > 0);
        debug("ERROR: size/checksum error doc\n") if ($c > 0);
      }
      if ($dosrc) {
        my $c = check_size_checksum($srccont, $tlpdbtlpobj->srccontainersize, 
                                              $tlpdbtlpobj->srccontainerchecksum);
        push @sizeerror, "$pkg.source (" . ($c == 1 ? "size" : "checksum") . ")"
          if ($c > 0);
        debug("ERROR: size/checksum error src\n") if ($c > 0);
      }
      # check the actually included files are correct
      # TODO TODO TODO
      #
      #
      # should we do more checks?
      # unlink("$temp/tlpkg/tlpobj/$pkg.tlpobj");
      # unlink("$temp/tlpkg/tlpobj/$pkg.source.tlpobj");
      # unlink("$temp/tlpkg/tlpobj/$pkg.doc.tlpobj");
      system("rm -rf \"$temp/tlpkg\"");
      system("rm -rf \"$temp/texmf\"");
      system("rm -rf \"$temp/texmf-dist\"");
      system("rm -rf \"$temp/texmf-doc\"");
      system("ls \"$temp\"");
    }
  }
  # system("rmdir --ignore-fail-on-non-empty $temp/tlpkg/tlpobj");
  # system("rmdir --ignore-fail-on-non-empty $temp/tlpkg");
  system("rmdir --ignore-fail-on-non-empty $temp");
  if (@notlpobj) {
    print "packages without containing tlpobj file:\n";
    for my $p (@notlpobj) {
      print "$p\n";
    }
  }
  if (@revisionerror) {
    print "packages with revision discrepancy:\n";
    for my $p (@revisionerror) {
      print "$p\n";
    }
  }
  if (@missingsrccontainer) {
    print "packages with missing src containers:\n";
    for my $p (@missingsrccontainer) {
      print "$p\n";
    }
  }
  if (@missingdoccontainer) {
    print "packages with missing doc containers:\n";
    for my $p (@missingdoccontainer) {
      print "$p\n";
    }
  }
  if (@sizeerror) {
    print "packages with wrong container size/checksums:\n";
    for my $p (@sizeerror) {
      print "$p\n";
    }
  }
  for my $pkg (keys %filedifferrors) {
    print "file differences in $pkg:\n";
    for my $l (@{$filedifferrors{$pkg}}) {
      print "  $l\n";
    }
  }
}


sub compare_lists {
  my ($la, $lb) = @_;
  my @la = @$la;
  my @lb = @$lb;
  my %onlyfirst;
  my %onlysecond;
  my @ret;
  for my $f (@la) { $onlyfirst{$f} = 1; }
  for my $f (@lb) { delete($onlyfirst{$f}); $onlysecond{$f} = 1; }
  for my $f (@la) { delete($onlysecond{$f}); }
  for my $f (sort keys %onlyfirst) { push @ret, "-$f"; }
  for my $f (sort keys %onlysecond) { push @ret, "+$f"; }
  return(@ret);
}

sub check_size_checksum {
  my ($cont, $size, $checksum) = @_;
  my $sizeerror = 0;
  my $checksumerror = 0;
  if ($size > -1) {
    my $s = (stat $cont)[7];
    if ($s == $size) {
      if ($checksum) {
        if (TeXLive::TLUtils::tlchecksum($cont) ne $checksum) {
          $checksumerror = 1;
        }
      }
    } else {
      $sizeerror = 1;
    }
  } else {
    if ($checksum) {
      if (tlchecksum($cont) ne $checksum) {
        $checksumerror = 1;
      }
    }
  }
  return 1 if $sizeerror;
  return 2 if $checksumerror;
  return 0;
}

__END__

=head1 NAME

check-tlnet-consistency - check the consistency of the tlnet distribution

=head1 SYNOPSIS

check-tlnet-consistency [I<option>]...

=head1 OPTIONS

=over 4

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

The location to find the previously generated containers;
default is C<./tlnet>.  

=item B<-no-setup>

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

=head1 DESCRIPTION

This program compares the revisions as found in the C<texlive.tlpdb> of 
the tlnet distributions with the revisions as specified in the included
C<tlpobj> files in each package. In case there is a discrepancy this is
reported to stdout.

=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

### Local Variables:
### perl-indent-level: 2
### tab-width: 2
### indent-tabs-mode: nil
### End:
# vim:set tabstop=2 expandtab: #