+ eval { use String::ShellQuote; 1 } or warn "can't load String::ShellQuote" && return;
+ $dw = shell_quote $dw;
+ my $e_package = shell_quote $package;
+ my $e_type = shell_quote $type;
+
+ my $exit = system(qq|TEXINPUTS=".:$dw:" kpsewhich $e_package.$e_type > /dev/null|);