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#!/usr/bin/env perl
# $Id$
# Public domain.  Originally written by Sebastian Rahtz.
# 
# Process a "cooked" tree directory (probably created by ctan2tds in
# Build/tmp.cooked), and integrate into the main texmf trees.
# 
# Basic usage: place PKG
# to process ./PKG.  Best invoked from ctan2tl, not directly.

BEGIN {
  chomp ($mydir = `dirname $0`);  # we are in Master/tlpkg/bin
  unshift (@INC, "$mydir/..");
}

use File::Basename;
use File::Find;
use Cwd;
use TeXLive::TLConfig qw/$InfraLocation $DatabaseName/;
use TeXLive::TLPSRC;
use TeXLive::TLPOBJ;
use TeXLive::TLPDB;
use TeXLive::TLTREE;

if ($ARGV[0] eq "-n") {
  $chicken = 1;
  shift;
} else {
  $chicken = 0;
}
print "place: chicken mode = $chicken\n";

die "usage: $0 PKGNAME\n" unless @ARGV == 1;
$package = $ARGV[0];

$newpackage = 0;
%dirs = ();  # dirs we make changes in
$TMP = $ENV{"TMPDIR"} || "/tmp";

$cooked = getcwd();  # ctan2tl invokes us in the cooked dire
-d "$cooked/$package" || die "$0: No such package in $cooked: $package\n";

&xchdir ("$mydir/../..");
$M = getcwd();

xchdir ("$cooked/$package");
if    (-d "texmf-dist") {$Root="texmf-dist"; }
elsif (-d "texmf-doc")  {$Root="texmf-doc"; }
elsif (-d "texmf")      {$Root="texmf"; }
else  { die ("no top level texmf in " . `pwd`); }

if ($Root eq 'texmf-doc') {
  $Type = 'Documentation';
} elsif ($Root eq 'texmf-dist') { 
  $Type = 'Package'; 
} elsif ($Root eq 'texmf') { 
  # can't handle binary stuff yet, but can do some hyphenations.
  $Type = 'TLCore'; 
} else {
  die "cannot handle Root=$Root";
}

# initialize TLPDB
my $tlpdb = new TeXLive::TLPDB ( root => "$M" );
# create TLTREE from stuff in cooked/$pkg
my $tltree = TeXLive::TLTREE->new( 'svnroot' => "$cooked/$package" );
$tltree->init_from_files;

# get package from TLPDB;
my $tlpold = $tlpdb->get_package("$package");
if (defined($tlpold)) {
  # what to do with binfiles, but they are not place-ed!!!
  foreach ($tlpold->srcfiles, $tlpold->runfiles, $tlpold->docfiles) {
    $Old{$_} = 1;
  }
} else {
  $newpackage = 1;
}

# create new tlpsrc and tlpobj
my $tlpsrc = TeXLive::TLPSRC;
if (! -r "$M/tlpkg/tlpsrc/$package.tlpsrc") {
  $tlpsrc->name("$package");
  $tlpsrc->category($Type);
  if (!$chicken) {
    open TMP, ">$M/tlpkg/tlpsrc/$package.tlpsrc" or die "Cannot open tlpsrc file!";
    $tlpsrc->writeout(\*TMP);
    close TMP
  }
} else {
  $tlpsrc->from_file("$M/tlpkg/tlpsrc/$package.tlpsrc");
}

my $tlpnew = $tlpsrc->make_tlpobj($tltree);

# we took over the comparison of files from the ctan2tl script since
# we are here in perl world, which makes it easier ...
print "\n\f ";
if (!defined($tlpold)) {
  print "place: $package not present in $M/$InfraLocation/$DatabaseName\n\n";
} else {
  print "new vs. present $package\n";
  my @oldfiles;
  push @oldfiles, $tlpold->srcfiles;
  push @oldfiles, $tlpold->runfiles;
  push @oldfiles, $tlpold->docfiles;
  `rm -f $TMP/tlplace.old`;
  foreach (sort @oldfiles) {
    `echo $_ >> $TMP/tlplace.old`;
  }
  my @newfiles;
  push @newfiles, $tlpnew->srcfiles;
  push @newfiles, $tlpnew->runfiles;
  push @newfiles, $tlpnew->docfiles;
  `rm -f $TMP/tlplace.new`;
  foreach (sort @newfiles) {
    `echo $_ >> $TMP/tlplace.new`;
  }
  print `comm -3 $TMP/tlplace.new $TMP/tlplace.old`;
  my @difffiles = `comm -12 $TMP/tlplace.new $TMP/tlplace.old`;
  chomp (@difffiles);
  my $sum = 0;
  my $diff_file = "$TMP/tlplace.diff";
  unlink ($diff_file);
  my $diff_cmd = "diff --text --ignore-all-space -U 0 -s";
  foreach (@difffiles) {
    my @foo = `$diff_cmd $M/$_ $cooked/$package/$_ | tee -a $diff_file`;
    $sum += $#foo; # zero-based, so first line doesn't count.
  }
  my $nrcommfiles = @difffiles;
  #
  my $identical;
  if (-s $diff_file) {
    chomp ($identical = `grep --text 'are identical' $diff_file | wc -l`);
  } else {
    $identical = 0;
  }
  #
  my $changed = $nrcommfiles - $identical;
  print "$nrcommfiles common files, $changed changed, ~$sum lines different ($diff_file)\n\n\f\n";
  #`rm -f $TMP/tlplace.new $TMP/tlplace.old $TMP/tlplace.diff`;
}


&xchdir ("$cooked/$package");
find (\&files,".");
foreach $file (sort keys %Old) {
  my $status = $New{$file} ? "retained" : "removed";
  print "* $file\t[$status]\n";

  # if the old file does not exist, don't try to remove it -- we
  # probably did so by hand and didn't bother to update.
  next unless -e "$M/$file";

  # remove old files.
  if (! $New{$file}) {
    &my_system ("svn remove $M/$file");
  }

  my $dname = dirname ("$M/$file");
  $dirs{$dname}++;
}

# copy files
my $job = "tar cf - . | (cd $M && tar xf - )";
&my_system ($job);

# sort so dirs will be added before subdirs.
foreach $file (sort keys %New) {
  if (! $Old{$file}) { 
    &add_file ("$M/$file");
  }
}

xchdir ($cooked);
&my_system ("mv $package $package.done");


if ($newpackage) {
  &add_file ("$M/tlpkg/tlpsrc/$package.tlpsrc");
}

# this file will often change, so be sure and include it.
$dirs{"$M/tlpkg/tlpsrc/$package.tlpsrc"}++;

# print dirs with changed files, for svn commit purposes.
# if other files have been modified in those same dirs, though, this
# won't detect it.  It would be better to list exactly the *files* which
# should be committed, but ... lazy.
# 
# also write dir list to a separate file, for easy passing to a commit.
# 
$DIRLIST = ">$TMP/tlplace.dirs";
open (DIRLIST) || die "open($DIRLIST) failed: $!";
#
print "place: directories are:\n";
for my $dir (sort keys %dirs) {
  print "$dir\n";
  print DIRLIST "$dir\n";
}
#
close (DIRLIST) || warn "close($DIRLIST) failed: $!";

#xx warn "WARNING WARNING Things we SHOULD/COULD do here:\n - Update the texlive.tlpdb\n - Compare the files ACTUALLY present in cooked/package with those included via tlpsrc/tltree generation!!!\n - Create list file\n - Update the list of available packages for web update\n - Create zip file(s)\n\n\n";

exit (0);



#--------------------------------------
sub dirs
{
    local @filenames;
   if (-d) { 
       @filenames=&buildfilelist($File::Find::name);
    if (!@filenames) { rmdir $File::Find::name;}
  }}

sub buildfilelist
{
    my($me) = @_;
    my @files;
    opendir(DIR,$me) || cleanup ("cannot open directory $me");
    @files =grep(!/^\.\.?/,readdir(DIR));
    closedir(DIR);  
    return @files;
}


sub files
{
  if (-f || -l) {  # consider files or symlinks
    $This = $File::Find::name;
    $This =~ s/^\.\///;
    $New{$This} = 1;
 }
}


# add a file to the repository.  for svn, we also have to add the
# containing dir, and the parent of that dir, if they are new.
# (Should really just traverse )
# 
sub add_file
{
  my ($newfile) = @_;
  
  my $newdir = dirname ($newfile);
  
  # when it's needed, parent must come first, else have svn "not working copy".
  my $parentdir = dirname ($newdir);
  unless (-d "$parentdir/.svn") {
    &my_system ("svn add -N $parentdir");
    $dirs{$parentdir}++;
  }
  
  unless (-d "$newdir/.svn") {
    &my_system ("svn add -N $newdir");
  }
  
  &my_system ("svn add $newfile");

  # remember that we changed this directory.
  $dirs{$newdir}++;
}


sub xchdir
{
  my ($dir) = @_;
  chomp (my $pwd = `pwd`);
  chdir ($dir) || die "chdir($dir) failed: $!\n(cwd=$pwd)";
  print "place: chdir($dir)\n";
}


sub my_system
{
  my ($cmd) = @_;
  
  print "place: SYSTEM $cmd\n";

  unless ($chicken) {
    my $ret = system ($cmd);
    die "`$cmd' failed, status=$ret, goodbye\n" if $ret != 0;
  }
}