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RedHat 9 (Linux i386) - man page for extutils::packlist (redhat section 3pm)

ExtUtils::Packlist(3pm) 	 Perl Programmers Reference Guide	  ExtUtils::Packlist(3pm)

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 pro-
       vided 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 for-
       mat, 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 dif-
       ferentiate 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>

perl v5.8.0				    2002-06-01			  ExtUtils::Packlist(3pm)


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