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NAME

     ExtUtils::Packlist - manage .packlist files



SYNOPSIS
        use ExtUtils::Packlist;
        my ($pl) = ExtUtils::Packlist->new('.packlist');
        $pl->read('/an/old/.packlist');
        my @missing_files = $pl->validate();
        $pl->write('/a/new/.packlist');

        $pl->{'/some/file/name'}++;
           or
        $pl->{'/some/other/file/name'} = { type => 'file',
                                           from => '/some/file' };




DESCRIPTION
     ExtUtils::Packlist provides a standard way to manage
     .packlist files.  Functions are provided to read and write
     .packlist files.  The original .packlist format is a simple
     list of absolute pathnames, one per line.  In addition, this
     package supports an extended format, where as well as a
     filename each line may contain a list of attributes in the
     form of a space separated list of key=value pairs.  This is
     used by the installperl script to differentiate between
     files and links, for example.



USAGE
     The hash reference returned by the new() function can be
     used to examine and modify the contents of the .packlist.
     Items may be added/deleted from the .packlist by modifying
     the hash.  If the value associated with a hash key is a
     scalar, the entry written to the .packlist by any subsequent
     write() will be a simple filename.  If the value is a hash,
     the entry written will be the filename followed by the
     key=value pairs from the hash.  Reading back the .packlist
     will recreate the original entries.



FUNCTIONS
     new()
          This takes an optional parameter, the name of a
          .packlist.  If the file exists, it will be opened and
          the contents of the file will be read.  The new()
          method returns a reference to a hash.  This hash holds
          an entry for each line in the .packlist.  In the case
          of old-style .packlists, the value associated with each
          key is undef.  In the case of new-style .packlists, the
          value associated with each key is a hash containing the
          key=value pairs following the filename in the
          .packlist.


     read()
          This takes an optional parameter, the name of the
          .packlist to be read.  If no file is specified, the
          .packlist specified to new() will be read.  If the
          .packlist does not exist, Carp::croak will be called.

     write()
          This takes an optional parameter, the name of the
          .packlist to be written.  If no file is specified, the
          .packlist specified to new() will be overwritten.

     validate()
          This checks that every file listed in the .packlist
          actually exists.  If an argument which evaluates to
          true is given, any missing files will be removed from
          the internal hash.  The return value is a list of the
          missing files, which will be empty if they all exist.

     packlist_file()
          This returns the name of the associated .packlist file



EXAMPLE
     Here's modrm, a little utility to cleanly remove an
     installed module.

         #!/usr/local/bin/perl -w

         use strict;
         use IO::Dir;
         use ExtUtils::Packlist;
         use ExtUtils::Installed;

         sub emptydir($) {
             my ($dir) = @_;
             my $dh = IO::Dir->new($dir) || return(0);
             my @count = $dh->read();
             $dh->close();
             return(@count == 2 ? 1 : 0);
         }

         # Find all the installed packages
         print("Finding all installed modules...\n");
         my $installed = ExtUtils::Installed->new();



         foreach my $module (grep(!/^Perl$/, $installed->modules())) {
            my $version = $installed->version($module) || "???";
            print("Found module $module Version $version\n");
            print("Do you want to delete $module? [n] ");
            my $r = <STDIN>; chomp($r);
            if ($r && $r =~ /^y/i) {
               # Remove all the files
               foreach my $file (sort($installed->files($module))) {
                  print("rm $file\n");
                  unlink($file);
               }
               my $pf = $installed->packlist($module)->packlist_file();
               print("rm $pf\n");
               unlink($pf);
               foreach my $dir (sort($installed->directory_tree($module))) {
                  if (emptydir($dir)) {
                     print("rmdir $dir\n");
                     rmdir($dir);
                  }
               }
            }
         }




AUTHOR
     Alan Burlison <Alan.Burlison@uk.sun.com>









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