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|
#!/usr/bin/perl
#
# vim: set ts=4:noet
#
# sboremove
# script to remove an installed SlackBuild
#
# authors: Luke Williams <xocel@iquidus.org>
# Jacob Pipkin <j@dawnrazor.net>
# Andreas Guldstrand <andreas.guldstrand@gmail.com>
# license: WTFPL <http://sam.zoy.org/wtfpl/COPYING>
use 5.16.0;
use strict;
use warnings FATAL => 'all';
use SBO::Lib qw/ get_inst_names get_installed_packages get_sbo_location get_build_queue merge_queues get_requires get_readme_contents get_sbo_location show_version in /;
use Getopt::Long qw(:config bundling);
use File::Basename;
my $self = basename ($0);
sub show_usage {
print <<"EOF";
Usage: $self [options] sbo
Options (defaults shown first where applicable):
-h|--help:
this screen.
-v|--version:
version information.
-a|--alwaysask:
always ask to remove, even if required by other packages on system.
Note: optional dependencies need to be removed separately.
EOF
return 1;
}
my ($help, $vers, $non_int, $alwaysask, @excluded);
GetOptions(
'help|h' => \$help,
'version|v' => \$vers,
'nointeractive' => \$non_int,
'alwaysask|a' => \$alwaysask,
);
if ($help) { show_usage(); exit 0 }
if ($vers) { show_version(); exit 0 }
if (!@ARGV) { show_usage(); exit 1 }
# ensure that all provided arguments are valid sbos
my @sbos;
my $inst_names = get_inst_names(get_installed_packages 'SBO');
my %inst_names;
$inst_names{$_} = 1 for @$inst_names;
for my $sbo (@ARGV) {
if (get_sbo_location($sbo)) {
$inst_names{$sbo} ? push @sbos, $sbo
: say "$sbo is not installed";
} else {
say "Unable to locate $sbo in the SlackBuilds.org tree."
}
}
exit 1 unless @sbos;
# Create full queue.
my ($remove_queue, %warnings);
for my $sbo (@sbos) {
my $queue = get_build_queue([$sbo], \%warnings);
@$queue = reverse(@$queue);
$remove_queue = merge_queues($remove_queue, $queue);
}
# Determine required by for all installed sbo's
my (%required_by, @confirmed);
# populates the required_by hash
sub get_reverse_reqs {
my $installed = shift;
INST: for my $inst (@$installed) {
my $require = get_requires($inst);
REQ: for my $req (@$require) {
next REQ if $req eq '%README%';
push @{ $required_by{$req} }, $inst if in($req => @$installed);
}
}
return 1;
}
get_reverse_reqs($inst_names);
# returns a list of installed sbo's that list the given sbo as a requirement,
# excluding any installed sbo's that have already been confirmed for removal
sub get_required_by {
my $sbo = shift;
my @dep_of;
if ( $required_by{$sbo} ) {
for my $req_by (@{$required_by{$sbo}}) {
push @dep_of, $req_by unless in($req_by => @confirmed);
}
}
return @dep_of ? \@dep_of : undef;
}
sub confirm_remove {
my $sbo = shift;
push @confirmed, $sbo unless in($sbo => @confirmed);
return 1;
}
# Check if packages in queue are actually installed on system
my @temp;
if (%inst_names) {
for my $sbo (@$remove_queue) {
push @temp, $sbo if $inst_names{$sbo};
}
$remove_queue = \@temp;
}
# Confirm all and skip prompts if noninteractive
if ($non_int) {
confirm_remove($_) for @$remove_queue;
goto CONFIRMED;
}
# Begin prompts
FIRST: for my $remove (@$remove_queue) {
# Determine whether $remove is still needed on system.
my $required_by = get_required_by $remove;
my $needed = 0;
my (%confirmed, %sbos);
$confirmed{$_} = 1 for @confirmed;
$sbos{$_} = 1 for @sbos;
for my $rq (@$required_by) {
$needed = 1 unless $confirmed{$rq} or $sbos{$remove};
# still needed, unless required_by is already confirmed for removal or
# the sbo in question was cli-specified.
}
if ( $needed ) {
next FIRST unless $alwaysask; #ignore sbo and skip prompt
print "$remove : required by " . join(' ', @$required_by) . "\n";
} else {
say "$remove";
}
# Check for %README% value and inform user.
if ( $warnings{$remove} ) {
say "It is recommended that you view the README before continuing.";
print "Display README now? [y]: ";
if (<STDIN> =~ /^[Yy\n]/) {
my ($readme, $exit) = get_readme_contents(get_sbo_location($remove));
if ($exit) {
warn "Unable to open README for $remove.\n";
} else {
print "\n" . $readme;
}
}
}
# Determine default behavior for prompt
my $default = 'y';
my $regex = "[Yy\n]";
if ($needed) {
$default = 'n';
$regex = "[Yy]";
}
# Ask user to confirm removal
print "Remove $remove? [$default]: ";
if (<STDIN> =~ /^$regex/) {
confirm_remove($remove);
say " * Added to remove queue\n";
} else {
say " * Ignoring\n";
}
}
CONFIRMED:
# Show remove queue
my $remove_count = @confirmed;
if ($remove_count) {
say "Removing $remove_count package(s)";
print join(' ', @confirmed) . "\n";
} else {
say 'Nothing to remove.';
exit 0;
}
# Final confirmation
unless ($non_int) {
print "\nAre 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;
|
