#! /usr/bin/env perl

use POSIX qw(mktime ctime);
use Time::Local qw( timegm );

# Offline check for status of files in a checked-out
# CVS module. 
# Artistic License, Dirk Mueller <mueller@kde.org> 2001-2003

# based on cvschanged by
# Sirtaj Singh Kang <taj@kde.org> Nov 1998.

if ( defined $ARGV[0] && $ARGV[0] =~ /(?:-h|--help)/) {
  print "cvscheck (c) 2001-2003 Dirk Mueller <mueller\@kde.org>\n\nUsage:\n";
  print "   cvscheck [options] <dirs>\n\n";
  print "Prints information about the status of your local CVS checkout without\n";
  print "communicating with the server (therefore in speed only limited by your\n";
  print "hard-disk throughput, much unlike cvs -n up).\n\n";
  print "Every file is printed with a status character in front of its name:\n";
  print "? foobar.c   file is not known to CVS - maybe you should add it?\n";
  print "M foobar.c   file is for sure locally modified.\n";
  print "m foobar.c   file *might* have local changes (needs a diff with the server).\n";
  print "C foobar.c   file has a CVS conflict and therefore cannot be committed.\n";
  print "U foobar.c   file is in CVS but its somehow missing in your local checkout.\n";
  print "T foobar.c   file has an unusual sticky CVS tag.\n";
  print "A foobar.c   you cvs add'ed this file but did not yet commit.\n";
  print "R foobar.c   you cvs rm'ed this file but did not yet commit.\n";

print <<EOF;


Options: 

-u | --unknown    Show only unknown (?) files
-m | --modified   Show only modified (m/M) files
--missing         Show only missing (U) files
-t | --tagged     Show only tagged (T) files
-a | --added      Show only added (A) files
-r | --removed    Show only removed (R) files
-c | --conflicts  Show only conflict (C) files

If no option is given, it defaults to show all files and diagnostic messages.
EOF
  exit;
}

# default is HEAD
$standardtag = "";
%defaulttag = ();
@dirqueue = ();
@merged = ();
@uncommitted = ();
@missing = ();
@tagged = ();
@removed = ();
@unknown = ();
@modified = ();
@conflicts = ();

%months = ( 'Jan' => 0, 'Feb' => 1, 'Mar' => 2, 'Apr' => 3, 'May' => 4,
            'Jun' => 5, 'Jul' => 6, 'Aug' => 7, 'Sep' => 8, 'Oct' => 9,
            'Nov' => 10, 'Dec' => 11);

%showoptions = ();
$optionlocal = 0;

sub printinfo($)
{
  print @_ if (defined($showoptions{"all"}));
}

# convert text stamp to GMT
sub strToTime
{
	my( $timestr ) = @_;

	if( ! ($timestr =~ 
		/^(\w+)\s*(\w+)\s*(\d+)\s*(\d+):(\d+):(\d+)\s*(\d+)/) ) {

		return -1;
	}

	# CVS timestamps are in GMT.

	my( $tm ) = timegm( $6, $5, $4, $3, $months{ $2 }, $7 - 1900);

	return $tm;
}

sub processEntries
{
	my ( $dir ) = @_;
        my %dirunknown = ();

        opendir (DIR, "$dir") || warn "Couldn't read '$dir'";
        # first assume all are unknown
        while ( $e = readdir(DIR) ) {
          next if ($e eq ".");
          next if ($e eq "..");
          next if ($e eq "RCS");
          next if ($e eq "SCCS");
          next if ($e eq "CVS");
          next if ($e eq "CVS.adm");
          next if ($e eq "RCSLOG");
          next if ($e eq "tags");
          next if ($e eq "TAGS");
          next if ($e eq ".make.state");
          next if ($e eq ".nse_depinfo");
          next if ($e eq "core");
          next if ($e eq ".libs");
          next if ($e eq ".deps");
          next if ($e =~ /^.+~$/);
          next if ($e =~ /^\#.+$/);
          next if ($e =~ /^\.\#.+$/);
          next if ($e =~ /^,.+$/);
          next if ($e =~ /^_\$.+$/);
          next if ($e =~ /^.+\$$/);
          next if ($e =~ /^.+\.old$/);
          next if ($e =~ /^.+\.bak$/);
          next if ($e =~ /^.+\.BAK$/);
          next if ($e =~ /^.+\.orig$/);
          next if ($e =~ /^.+\.rej$/);
          next if ($e =~ /^\.del-.+$/);
          next if ($e =~ /^.+\.a$/);
          next if ($e =~ /^.+\.olb$/);
          next if ($e =~ /^.+\.o$/);
          next if ($e =~ /^.*\.obj$/);
          next if ($e =~ /^.+\.so$/);
          next if ($e =~ /^.+\.Z$/);
          next if ($e =~ /^.+\.elc$/);
          next if ($e =~ /^.+\.ln$/);
          next if ($e =~ /^cvslog\..*$/);

          # kde specific entries
          # TODO read from CVSROOT/cvsignore - if it's been checked out!
          next if ($e eq "config.cache");
          next if ($e eq "config.log");
          next if ($e eq "config.status");
          next if ($e eq "index.cache.bz2");
          next if ($e eq ".memdump");
          next if ($e eq "autom4te.cache");
          next if ($e eq "autom4te.cache");
	  next if ($e eq "Makefile.rules");
	  next if ($e eq "Makefile.calls");
	  next if ($e eq "Makefile.rules.in");
	  next if ($e eq "Makefile.calls.in");
          next if ($e =~ /^.*\.moc$/);
          next if ($e =~ /^.+\.gmo$/);
          next if ($e =~ /^.+\.moc\.[^\.]+$/);
          next if ($e =~ /^.+\.lo$/);
          next if ($e =~ /^.+\.la$/);
          next if ($e =~ /^.+\.rpo$/);
          next if ($e =~ /^.+\.closure$/);
          next if ($e =~ /^.+\.all_cpp\.cpp$/);
          next if ($e =~ /^.+\.all_C\.C$/);
          next if ($e =~ /^.+\.all_cc\.cc$/);
          next if ($e =~ /^.+_meta_unload\.[^\.]+$/);
          next if ($e =~ /^.+\.kidl$/);
          next if ($e =~ /^.+_skel\.[^\.]+$/);

          # Qt specific entries
          next if ($e eq ".ui");
          next if ($e eq ".moc");
          next if ($e eq ".obj");

          $dirunknown{$e} = 1;
        }
        closedir(DIR);
        if( open(CVSIGNORE, $dir."/.cvsignore") ) {
          while(<CVSIGNORE>) {
            s/\s*$//;
            my $line = $_;
            foreach my $entry ( split(/ /,$line) ) {
              if ($entry =~ /[\*\?]/) {
                my $pattern = quotemeta $entry;
                $pattern =~ s/\\\*/.*/g;
                $pattern =~ s/\\\?/./g;
                foreach $m (keys (%dirunknown)) {
                  $dirunknown{$m} = 0 if ($m =~ /^$pattern$/);
                }
                next;
              }
              $dirunknown{$entry} = 0;
            }
          }
          close(CVSIGNORE);
        }

	if ( !open( ENTRIES, $dir."/CVS/Entries" ) ) {
          &printinfo("I CVS/Entries missing in $dir\n");
          return;
        }
        my $oldstandardtag = defined($defaulttag{$dir}) ? $defaulttag{$dir} : "";
        my $staginfo = "";
        if( open(CVSTAG, $dir."/CVS/Tag" ) ) {
          my $line = <CVSTAG>;
          if($line =~ /^[TDN](.+)$/) {
            $standardtag = $1;
            $staginfo = $1;
          }
          else {
            # something with D - assume HEAD
            $oldstandardtag = $standardtag = ""; # its HEAD
            &printinfo("I $dir has unknown stickyness: $line");
          }
          close(CVSTAG);
        }
        else {
          $standardtag = ""; # its HEAD
          $staginfo = "(HEAD)";
        }
        &printinfo("I $dir has sticky tag $staginfo\n") if($standardtag ne $oldstandardtag);
	while( <ENTRIES> ) {
          if ( m#^\s*D/([^/]+)/# ) {
               if (-d "$dir/$1" && !$optionlocal) {
                 push ( @dirqueue, "$dir/$1" );
                 $defaulttag{"$dir/$1"} = $standardtag;
               }
               $dirunknown{$1} = 0;
               next;
            }

          next if !m#^\s*/([^/]+)/([-]*[\d\.]*)/([^/]+)/([^/]*)/(\S*)$#;
          $fname = $1;
          $ver = $2;
          $stamp = $3;
          $options = $4;
          $tag = $5;
          $tag = $1 if ($tag =~ /^[TD](.+)$/);

          $dirunknown{$fname} = 0;

          my $taginfo="";
          if(defined($showoptions{"all"})) {
            if ( $tag ne $standardtag ) {
              if ($tag eq "") {
                $taginfo = " (HEAD)";
              }
              else {
                $taginfo = " ($tag)";
              }
            }
            if ($options =~ /^\-k(.)$/) {
              $taginfo .= " (no RCS-tags)" if($1 eq "o");
              $taginfo .= " (RCS binary file)" if($1 eq "b");
              $taginfo .= " (RCS values only)" if($1 eq "v");
              $taginfo .= " (RCS keywords only)" if($1 eq "k");
            }
          }
          my $state = $stamp;
          if( $stamp =~ m(^(.+)\+(.+)$) ) {
            $state = $1;
            $stamp = $2;
          }
          if ( $state =~ /merge/ ) {
            # modified version merged with update from server
            # check for a conflict
            if ( open (F, "$dir/$fname") ) {
              my @conflict = grep /^<<<<<<</, <F>;
              close (F);
              if( @conflict ) {
                push @conflicts, "$dir/$fname$taginfo";
                next;
              }
            } 
            else {
              push @missing, "$dir/$fname$taginfo";
              next;
            }
          }
          if ( $ver =~ /^\-.*/ ) {
            push @removed, "$dir/$fname$taginfo";
            next;
          }
          $mtm = strToTime( $stamp );
          if( $mtm < 0 ) {
            if ( $ver eq "0" ) {
              push @uncommitted, "$dir/$fname$taginfo";
            }
            else {
              push @merged, "$dir/$fname$taginfo";
            }
            next;
          }
          @sparams = lstat( "$dir/$fname" );

          if ( $#sparams < 0 ) {
            push @missing, "$dir/$fname$taginfo";
            next;
          }
          if( $mtm < $sparams[ 9 ] ) {
            push @modified, "$dir/$fname$taginfo";
            next;
          }
          if ( $tag ne $standardtag ) {
            push @tagged, "$dir/$fname$taginfo";
          }
	}
	close( ENTRIES );

        my @unknownlist = sort keys (%dirunknown);
        foreach $entry (@unknownlist) {
          next if ($dirunknown{$entry} == 0);
          # ignore unusual files
          next if (-l "$dir/$entry" );
          # its a CVS directory ? might be a different module
          if (-d "$dir/$entry" and -d "$dir/$entry/CVS") {
            $defaulttag{"$dir/$entry"} = $standardtag;
            push ( @dirqueue, "$dir/$entry" );
            next;
          }
          push @unknown, "$dir/$entry";
        }
}

sub printlist($$@)
{
  my ($status, $type, @flist) = @_;

  return if (not defined($showoptions{"all"}) and 
             not defined($showoptions{"$type"}));

  if(defined($showoptions{"all"})) {
    foreach (@flist) {
      s/\.\///;
      print "$status $_\n";
    }
  }
  else {
    foreach(@flist) {
      print "$_\n";
    }
  }
}

foreach $f ( @unknown ) {
  $f =~ s/^\.\///;
  print "? $f\n";
}
foreach (@ARGV) {
   $showoptions{"unknown"}++ if(/^(?:-u|--unknown)$/);
   $showoptions{"modified"}++ if(/^(?:-m|--modified)$/);
   $showoptions{"missing"}++ if(/^(?:--missing)$/);
   $showoptions{"tagged"}++ if(/^(?:-t|--tagged)$/);
   $showoptions{"added"}++ if(/^(?:-a|--added)$/);
   $showoptions{"removed"}++ if(/^(?:-r|--removed)$/);
   $showoptions{"conflicts"}++ if(/^(?:-c|--conflicts)$/);
   $optionlocal++ if(/^(?:-l|--local)$/);

   next if (/^-/);
   push (@dirqueue, "./$_");
}

# if no special flags set, show all files
$showoptions{"all"}++ if(scalar(keys(%showoptions)) == 0);

# Try current directory if none specified
push(@dirqueue, ".") if( $#dirqueue < 0 );

# process directory queue
while ($#dirqueue >= 0) {
  processEntries( pop @dirqueue );
}

&printlist("?", "unknown", @unknown);
&printlist("M", "modified", @modified);
&printlist("m", "modified", @merged);
&printlist("U", "missing", @missing);
&printlist("T", "tagged", @tagged);
&printlist("A", "added", @uncommitted);
&printlist("R", "removed", @removed);
&printlist("C", "conflicts", @conflicts);

=head1 NAME

cvscheck -- Lists all files in checked out CVS modules that have been
edited or changed locally. No connection is required to the CVS server,
therefore being extremely fast. 

=head1 AUTHOR

Dirk Mueller <mueller@kde.org>
based on cvschanged by Sirtaj Singh Kang <taj@kde.org>

=cut