#! perl

use Data::Dumper;

use strict;
use Carp;
use Cwd;
use Getopt::Long;
use Config;

#
# Do a perl check for version >= 5.005.  See 'gpt-translate-interpreter' should
# you need to alter the invocation path to a valid perl interpreter in the GPT 
# front-end programs.
#

if ( ! ( defined eval "require 5.005" ) )
{
    die "GPT requires at least Perl version 5.005";
}

#
# dig the globus and gpt paths out of the user's environment variables
#

my $gpath     = defined $ENV{GPT_LOCATION} ? $ENV{GPT_LOCATION} 
                                           : $ENV{GLOBUS_LOCATION};
if ( !defined($gpath))
{
    die("GPT_LOCATION needs to be set before running this script");
}

@INC = ("$gpath/lib/perl", "$gpath/lib/perl/$Config{'archname'}", @INC);

system("$gpath/sbin/gpt_version") == 0
         or die "GPT died due to Version mismatch.  Check PATH and GPT_LOCATION\n" ;


if ( ! ( defined eval "require Grid::GPT::GPTObject" ) )
{
    die("$gpath does not appear to hold a valid GPT installation\n");
}

require Pod::Usage;

my ($noaction, $force, $help, $man, $native, $version, $debug, $verbose,
    $bundle, $location);


GetOptions(
           'help|?'           => \$help,
           'man'              => \$man,
           'force|?'          => \$force,
           'version'          => \$version,
           'debug'          => \$debug,
           'verbose'          => \$verbose,
           'bundles'          => \$bundle,
           'location=s'       => \$location,
           'installdir=s'     => \$location,
           'noaction|n'       => \$noaction,
          )
  or Pod::Usage::pod2usage(0);

Pod::Usage::pod2usage(1) if $help;
Pod::Usage::pod2usage(-verbose => 2) if $man;


require Grid::GPT::GPTIdentity;
Grid::GPT::GPTIdentity::print_gpt_version() if defined $version;

my @inputs = @ARGV;

require Grid::GPT::Algorithms;
require Grid::GPT::PkgMngmt;
require Grid::GPT::Locations;
require Grid::GPT::PkgMngmt::Inform;

my $log = new Grid::GPT::PkgMngmt::Inform(
                                          verbose => $verbose, 
                                          debug => $debug
                                         );


my $locations = new Grid::GPT::Locations(
                                         installdir => $location,
                                        );

my $checks = 
  new Grid::GPT::Algorithms(
                            log => $log,
                            force => $force,
                            locations => $locations,
                            with_filelists => 1,
                           );

my $pkgmngr = new Grid::GPT::PkgMngmt(
                                      log => $log,
                                      locations => $locations,
                                     );

my ($results);

if (defined $bundle) {
  $results = $checks->remove(inputs => \@inputs, bundles => 1);
} else {
  $results = $checks->remove(inputs => \@inputs);
}

if (! defined $results) {
  $locations->cleantmp();
  die $checks->{'error_msg'} if ! defined $results;
}


if (defined $noaction) {

  print "The following bundles would be removed\n" if @{$results->{'bndls'}};

  for my $b (@{$results->{'bndls'}}) {
    print "\t$b->{'Name'} ver: ", $b->version_label(), "\n";
  }

  print "The following packages would be removed\n" if @{$results->{'pkgs'}};

  for my $p (@{$results->{'pkgs'}}) {
    print "\t",$p->label()," ver: ", $p->version_label(), "\n";
  }

  $locations->cleantmp();
  exit 0;
}

if (defined $bundle and ! @{$results->{'bndls'}}) {

  die "ERROR: No bundles were removed\n";

} elsif (! @{$results->{'pkgs'}}) {

  die "ERROR: No packages were removed\n";
}


$pkgmngr->remove(%$results);

$locations->cleantmp();
exit 0;

=head1 NAME

B<gpt-uninstall> - Uninstall any GPT package.

=head1 SYNOPSIS

gpt-uninstall [--force --help -name ] pkgname-flavor-pkgtype

=head1 DESCRIPTION

B<gpt-uninstall> will uninstall a package from the system.  


=head1 OPTIONS

=over 8

=item B<-force> 

This will force actions to take place.

=item B<-native>

Use native package manager (Only works with rpm).

=item B<pkgname-flavor-pkgtype> 

Expression describing the packages that should be removed.

=item B<-help>

Print a brief help message and exits.

=item B<-man>

Prints the manual page and exits.

=item B<-version>

Prints the version of GPT and exits.

=back

=head1 EXAMPLES

  gpt-uninstall -name=foo

removes all flavors and package types with the name "foo".

 gpt-uninstall foo

Also removes all flavors and package types with the name "foo".

  gpt-uninstall 'foo-*-*'

A third way of typing the same uninstall.  Note the single quotes.

  gpt-uninstall '*-noflavor-*'

Remove all of the packages with a 'noflavor' build flavor.

  gpt-uninstall '*-*-*'

Remove all packages.  Note that files generated by gpt-postinstall
will not be removed

=head1 BUGS

Currently the flavor check that gpt-uninstall uses only works if the flavor is installed by gpt-build.  And so for example:

 gpt-uninstall foo-gcc32-*

will B<not> work.  The work around is to uninstall the packages individually using something like:

 gpt-uninstall -name=foo -flavor=gcc32 -pkgtype=pgm

Or use a wild card for the flavor to uninstall all flavors of the package.

 gpt-uninstall foo-*-*


=head1 SEE ALSO

gpt-install(1) gpt-query(1) gpt-verify(1) gpt-postinstall(1)

=head1 AUTHOR

Michael Bletzinger E<lt>mbletzin.ncsa.uiuc.eduE<gt> and Eric Blau
E<lt>eblau.ncsa.uiuc.eduE<gt>

=cut