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|
#!/usr/bin/env perl
#
# vim: set ts=4:noet
#
# sboremove
# script to remove an installed SlackBuild
#
# author: Luke Williams <xocel@iquidus.org>
# license: WTFPL <http://sam.zoy.org/wtfpl/COPYING>
use 5.16.0;
use strict;
use warnings FATAL => 'all';
use SBO::Lib;
use Getopt::Long qw(:config bundling);
use File::Basename;
my $self = basename ($0);
sub show_usage () {
print <<EOF
Usage: $self [options] sbo
Options (defaults shown first where applicable):
-h|--help:
this screen.
-v|--version:
version information.
-R|--norequirements:
do not parse requirements.
-a|--alwaysask:
always ask to remove, even if required by other packages on system.
Note: optional dependencies need to be removed separately.
EOF
}
my ($help, $vers, $non_int, $no_reqs, $alwaysask, @excluded);
GetOptions (
'help|h' => \$help,
'version|v' => \$vers,
'norequirements|R' => \$no_reqs,
'nointeractive' => \$non_int,
'alwaysask|a' => \$alwaysask,
);
show_usage and exit 0 if $help;
show_version and exit 0 if $vers;
show_usage and exit 0 unless exists $ARGV[0];
my $inst_names = get_inst_names (get_installed_sbos);
# ensure that all provided arguments are valid sbos
my @arguments;
for my $sbo (@ARGV) {
if (get_sbo_location($sbo)) {
if ($sbo ~~ @$inst_names) {
push @arguments, $sbo;
} else {
say "$sbo is not installed";
}
} else {
say "Unable to locate $sbo in the SlackBuilds.org tree."
}
}
my %sbos{$_} = [] for @arguments;
# wrapper to pull the list of requirements for a given sbo
# TODO: look at moving this into Lib.pm
sub get_requires ($) {
my $location = get_sbo_location (shift);
return get_from_info(LOCATION => $location, GET => 'REQUIRES')
}
# populate the %sbos hash with requirements for each sbo
$sbos{$_} = get_requires $_ for keys $sbos;
# clean the %sbos hash of anything that's already a hash key
while (my ($key, $val) = each %sbos) {
my @remove;
for my $key (keys @$val) {
push @remove, $key if $$val[$key] ~~ %sbos;
}
for my $rem (@remove) {
splice(@$val, $rem, 1);
$_-- for @remove;
}
}
# now we have to go backwards - starting from the end, check every requirement
# to ensure that it's not already listed earlier.
for my $key (reverse %sbos) {
for my $sbo (@$key) {
# running out of var names, so prefix these with n for "next"
FIRST: while (my ($nkey, $nval) = each %sbos) {
# move on if we're looking at the same key we're starting with
next FIRST if $key == $nkey;
my @remove;
for my $key (keys @$nval) {
push @remove, $key if $key $$nval[$key] == $sbo;
}
for my $rem (@remove) {
splice(@$nval, $rem, 1)
$_-- for @remove;
}
}
}
}
my ($remove_queue, %required_by, %warnings, @confirmed);
# Determine required by for all installed sbo's
sub get_reverse_reqs () {
FIRST: for my $inst (@$inst_names) {
my $requires = get_requires $inst;
next FIRST unless $$requires[0];
for my $req (@$requires) {
unless ( $req eq '%README%' ) {
push @{$required_by{$req}}, $inst if $req ~~ $inst_names;
}
}
}
}
get_reverse_reqs unless $no_reqs;
sub get_required_by ($) {
my $sbo = shift;
my @dep_of;
if ( $required_by{$sbo} ) {
for my $req_by (@{$required_by{$sbo}}) {
unless ($req_by ~~ @confirmed) {
push @dep_of, $req_by;
}
}
}
return \@dep_of;
}
sub confirm_remove ($) {
my $sbo = shift;
push @confirmed, @sbo unless $sbo ~~ @confirmed;
}
# Determine dependencies & warnings
if ($no_reqs) {
$remove_queue = \@remove;
} else {
$remove_queue = get_build_queue(\@remove, \%warnings);
@$remove_queue = reverse(@$remove_queue);
}
# Check if packages in queue are actually installed on system
my @temp;
if ($inst_names) {
for my $sbo (@$remove_queue) {
push @temp, $sbo if $sbo ~~ @$inst_names;
}
$remove_queue = \@temp;
}
if ($non_int) {
confirm_remove $_ for @$remove_queue;
goto CONFIRMED;
}
for my $remove (@$remove_queue) {
my $required_by = get_required_by $remove;
CONFIRMED:
# Show remove queue
my $remove_count = @confirmed;
if ($remove_count) {
say "Removing $remove_count package(s)";
for my $pkg (@confirmed) {
print "$pkg ";
}
say "\n";
} else {
say 'Nothing to remove.';
exit 0;
}
unless ($non_int) {
print 'Are you sure you want to continue? [n] : ';
unless (<STDIN> =~ /^[Yy]/) {
say 'Exiting.';
exit 0;
}
}
system ("/sbin/removepkg $_") for @confirmed;
say "All operations have completed successfully.";
exit 0;
|
