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package App::Beam::Command;
use strict;
use Carp;
require Exporter;
our @ISA = qw(Exporter);
our @EXPORT_OK = qw(CHAN_STDOUT CHAN_STDERR);
our %EXPORT_TAGS = (
channels => [ qw(CHAN_STDOUT CHAN_STDERR) ]
);
use IPC::Open3;
use Symbol 'gensym';
sub new {
my $class = shift;
return bless { argv => \@_ }, $class;
}
sub add {
my $self = shift;
push @{$self->{argv}}, @_;
}
use constant {
CHAN_STDOUT => 0,
CHAN_STDERR => 1
};
sub run {
my $self = shift;
my $out = gensym;
my $err = gensym;
return $self->{status} if exists($self->{status});
my $pid = open3(\*STDIN, $out, $err, @{$self->{argv}});
waitpid($pid, 0);
$self->{status} = $?;
local $/ = undef;
$self->{channel}[CHAN_STDOUT] = <$out>;
$self->{channel}[CHAN_STDERR] = <$err>;
return $self->{status};
}
sub restart {
my $self = shift;
delete $self->{status};
delete $self->{channel};
return $self->run;
}
sub status {
my $self = shift;
return undef unless exists $self->{status};
return $self->{status};
}
sub channel {
my ($self, $chan) = @_;
return undef if !exists($self->{channel}) || $chan > $#{$self->{channel}};
open(my $fd, '<', \$self->{channel}[$chan]) or croak "can't dup: $!";
return $fd;
}
sub argv {
my ($self) = @_;
return @{$self->{argv}};
}
sub command_line {
my ($self) = @_;
return join(' ', $self->argv);
}
sub command_name {
my ($self) = @_;
return $self->{argv}[0];
}
sub exit_code {
my ($self) = @_;
my $code = $self->status;
return -1 if (!defined($code) || $code == -1 || ($code & 127));
return $code >> 8;
}
1;
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