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|
# Hey emacs! This is a -*- Perl -*- script!
#
# Lintian::IPC::Run3 -- Perl utility functions for lintian
#
# Copyright (C) 2020 Felix Lechner
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, you can find it on the World Wide
# Web at https://www.gnu.org/copyleft/gpl.html, or write to the Free
# Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
# MA 02110-1301, USA.
package Lintian::IPC::Run3;
use v5.20;
use warnings;
use utf8;
use Exporter qw(import);
our @EXPORT_OK;
BEGIN {
@EXPORT_OK = qw(
safe_qx
xargs
);
}
use Const::Fast;
use IPC::Run3;
const my $EMPTY => q{};
const my $NULL => qq{\0};
const my $WAIT_STATUS_SHIFT => 8;
=head1 NAME
Lintian::IPC::Run3 - process functions based on IPC::Run3
=head1 SYNOPSIS
use Lintian::IPC::Run3 qw(safe_qx);
=head1 DESCRIPTION
This module contains process functions based on IPC::Run3.
=head1 FUNCTIONS
=over 4
=item C<safe_qx(@cmd)>
Emulates the C<qx()> operator but with array argument only.
=cut
sub safe_qx {
my @command = @_;
my $stdout;
my $stderr;
run3(\@command, \undef, \$stdout, \$stderr);
my $exitcode = $?;
my $status = ($exitcode >> $WAIT_STATUS_SHIFT);
$? = $status;
return $stdout . $stderr
if $?;
return $stdout;
}
=item C<xargs>
=cut
sub xargs {
my ($command, $arguments, $processor) = @_;
$command //= [];
$arguments //= [];
return
unless @{$arguments};
my $input = $EMPTY;
$input .= $_ . $NULL for @{$arguments};
my $stdout;
my $stderr;
my @combined = (qw(xargs --null --no-run-if-empty), @{$command});
run3(\@combined, \$input, \$stdout, \$stderr);
my $exitcode = $?;
my $status = ($exitcode >> $WAIT_STATUS_SHIFT);
$processor->($stdout, $stderr, $status, @{$arguments});
return;
}
=back
=head1 SEE ALSO
lintian(1)
=cut
1;
# Local Variables:
# indent-tabs-mode: nil
# cperl-indent-level: 4
# End:
# vim: syntax=perl sw=4 sts=4 sr et
|
