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package Devel::REPL::Plugin::Interrupt;
use Devel::REPL::Plugin;
use Sys::SigAction qw(set_sig_handler);
use namespace::clean -except => [ 'meta' ];
around 'run' => sub {
my ($orig, $self) = (shift, shift);
local $SIG{INT} = 'IGNORE';
return $self->$orig(@_);
};
around 'run_once' => sub {
my ($orig, $self) = (shift, shift);
# We have to use Sys::SigAction: Perl 5.8+ has safe signal handling by
# default, and Term::ReadLine::Gnu restarts the interrupted system calls.
# The result is that the signal handler is not fired until you hit Enter.
my $sig_action = set_sig_handler INT => sub {
die "Interrupted.\n";
};
return $self->$orig(@_);
};
around 'read' => sub {
my ($orig, $self) = (shift, shift);
# here SIGINT is caught and only kills the line being edited
while (1) {
my $line = eval { $self->$orig(@_) };
return $line unless $@;
die unless $@ =~ /^Interrupted\./;
# (Term::ReadLine::Gnu kills the line by default, but needs a LF -
# maybe I missed something?)
print "\n";
}
};
1;
__END__
=head1 NAME
Devel::REPL::Plugin::Interrupt - traps SIGINT to kill long-running lines
=head1 DESCRIPTION
By default L<Devel::REPL> exits on SIGINT (usually Ctrl-C). If you load this
module, SIGINT will be trapped and used to kill long-running commands
(statements) and also to kill the line being edited (like eg. BASH do). (You
can still use Ctrl-D to exit.)
=head1 AUTHOR
Shawn M Moore, C<< <sartak at gmail dot com> >>
=cut
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