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package Reply::Plugin::CarpReply;
use strict;
use warnings;
# ABSTRACT: plugin that implements most of the functionality of Carp::Reply
use base 'Reply::Plugin';
use Devel::StackTrace::WithLexicals;
=head1 SYNOPSIS
Reply->new(plugins => ['CarpReply'])->run;
=head1 DESCRIPTION
This plugin implements the L<Reply> shell commands to support L<Carp::Reply>'s
behavior. It currently isn't incredibly useful on its own as part of a config
file, but can be useful if you want more control over creating a
Carp::Reply-like shell.
See the L<Carp::Reply> docs for a description of the commands provided by this
plugin.
=cut
sub new {
my $class = shift;
my $self = $class->SUPER::new(@_);
$self->{stacktrace} = Devel::StackTrace::WithLexicals->new(
ignore_class => ['Reply', 'Carp::Reply', __PACKAGE__],
);
$self->_frame_index(0);
return $self;
}
sub compile {
my $self = shift;
my ($next, $line, %args) = @_;
$self->_frame_index($self->{frame_index});
my ($code) = $next->($line, %args);
return $code;
}
sub command_backtrace {
my $self = shift;
print "Backtrace:\n";
print $self->{stacktrace};
return '';
}
sub command_top {
my $self = shift;
$self->_frame_index($self->{stacktrace}->frame_count - 1);
return '';
}
sub command_bottom {
my $self = shift;
$self->_frame_index(0);
return '';
}
sub command_up {
my $self = shift;
$self->_frame_index($self->{frame_index} + 1);
return '';
}
sub command_down {
my $self = shift;
$self->_frame_index($self->{frame_index} - 1);
return '';
}
sub command_list {
my $self = shift;
my $file = $self->_frame->filename;
my $line = $self->_frame->line;
if (open my $fh, '<', $file) {
my @code = <$fh>;
chomp @code;
my $min = $line - 6;
my $max = $line + 4;
$min = 0 if $min < 0;
$max = $#code if $max > $#code;
print "File $file:\n";
for my $cur ($min..$max) {
next unless defined $code[$cur];
printf "%s%*d: %s\n",
$cur + 1 == $line ? '*' : ' ',
length($max + 1),
$cur + 1,
$code[$cur];
}
}
else {
print "Unable to open $file for reading: $!";
}
return '';
}
sub command_env {
my $self = shift;
our $env = $self->_frame->lexicals;
return '$' . __PACKAGE__ . '::env';
}
sub command_trace { shift->command_backtrace(@_) }
sub command_bt { shift->command_backtrace(@_) }
sub command_t { shift->command_top(@_) }
sub command_b { shift->command_bottom(@_) }
sub command_u { shift->command_up(@_) }
sub command_d { shift->command_down(@_) }
sub command_l { shift->command_list(@_) }
sub _frame_index {
my $self = shift;
my ($index) = @_;
if ($index < 0) {
print "You're already at the bottom frame.\n";
}
elsif ($index >= $self->{stacktrace}->frame_count) {
print "You're already at the top frame.\n";
}
else {
if (!defined $self->{frame_index} || $self->{frame_index} != $index) {
$self->{frame_index} = $index;
printf "Now at %s:%s (frame $index)\n",
$self->_frame->filename,
$self->_frame->line;
}
$self->publish(
'lexical_environment',
$self->_frame->lexicals
);
$self->publish('package', $self->_frame->package);
}
}
sub _frame {
my $self = shift;
return $self->{stacktrace}->frame($self->{frame_index});
}
=begin Pod::Coverage
command_backtrace
command_trace
command_bt
command_top
command_t
command_bottom
command_b
command_up
command_u
command_down
command_d
command_list
command_l
command_env
=end Pod::Coverage
=cut
1;
|
