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lib/App/CLI/Plugin/StackTrace.pm  view on Meta::CPAN

	$self->maybe::next::method(@argv);
}

sub _build_override_die_subroutine {

	my $self = shift;

	$SIG{__DIE__} = sub {

		my $message = shift;
		my @frames;
		my $pkg   = ref $self;
		my $trace = Devel::StackTrace->new( ignore_package => \@IGNORE_PACKAGE );
		my $stacktrace_message = <<STACKTRACE_MESSAGE;
$pkg

  $message

----------
STACKTRACE_MESSAGE

		chomp $message;

		LOOP_OF_FRAMES:
		while ( my $frame = $trace->next_frame ) {

			my $start_line = $frame->line - $CONTEXT_LINE;
			my $end_line   = $frame->line + $CONTEXT_LINE;
			if ($start_line < 1) {
				$start_line = 1;
			}

			my @lines;
			open my $fh, "<", $frame->filename or die sprintf("can not open %s. %s", $frame->filename, $!);
			flock $fh, LOCK_EX                 or die sprintf("can not flock %s. %s", $frame->filename, $!);
			while ( my $line = <$fh> ) {

				chomp $line;
				my $current_line = $.;
				if ($current_line < $start_line || $current_line > $end_line) {
					next;
				}
				my $mark = ($current_line == $frame->line) ? "*" : " ";
				push @lines, sprintf("   %s %05d: %s", $mark, $current_line, $line);
			}
			close $fh or die sprintf("can not close %s. %s", $frame->filename, $!);

			my $package  = $frame->package;
			my $filename = $frame->filename;
			my $line     = $frame->line;
			my $lines    = join "\n", @lines;
			$stacktrace_message .= <<STACKTRACE_MESSAGE;
  $package at $filename line $line.

$lines

  ==========
STACKTRACE_MESSAGE

		} # end of LOOP_OF_FRAMES