Best way to debug?

[fpsvogel]

Hi, I'm having trouble running a lua script under the VM. I've successfully tested the VM with simple code, and my script works running it normally with lua. I've escaped all single-quotes in the script with \x27, and I made sure the string of code is all in one piece. Am I missing something, any rules of thumb? The reason I'm not posting any code specifically is that it's quite a long script, but I can pastebin it if you'd like. Thanks.

[LunarLanding]

You can use mobdebug via websockets. See https://github.com/LunarLanding/mobdebug_js On Jan 10, 2015 1:29 AM, "fps-vogel" notifications@github.com wrote:

Hi,

I'm having trouble running a lua script under the VM. I've successfully tested the VM with simple code, and my script works running it normally with lua. I escaped all single-quotes in the script with \x27, and I made sure the string of code is all in one piece. Am I missing something, any rules of thumb? The reason I'm not posting any code specifically is that it's quite a long script, but I can pastebin it if you'd like. Thanks.

— Reply to this email directly or view it on GitHub https://github.com/kripken/lua.vm.js/issues/23.

[daurnimator]

There should be an error message. What is it?

[fpsvogel]

I'm a bit confused as to how to set up mobdebug. I've got the modules, but where does my script fit in? Should I paste it in main.lua? The other step I don't understand is to "start the debug server", since that sounds like it's not the same as (and comes after) "start the mobdebug server" which is explained on the mobdebug page. Sorry for my ignorance.

[fpsvogel]

Also, when I try to start the mobdebug server with lua -e "require('mobdebug').listen()", I get the error ".\socket.lua:4: attempt to index global 'js' (a nil value)". I'm probably missing something obvious...

[LunarLanding]

By starting the server I mean opening mobdebug(the ide). There should be a button in the debug pane for starting the server. As for js not being defined. That's very weird. Maybe you could try the example provided in the mobdebug_js repository? If you have any more doubts about setting up the remote debugger, maybe it would be best to continue them in mobdebug_js repository.

I'm a bit confused as to how to set up mobdebug. I've got the modules, but where does my script fit in? Should I paste it in main.lua? The other step I don't understand is to "start the debug server". Sorry for my ignorance.

— Reply to this email directly or view it on GitHub https://github.com/kripken/lua.vm.js/issues/23#issuecomment-69434480.

[fpsvogel]

I haven't gotten mobdebug running, but I did figure out what was wrong with my Lua code and it is now running fine under the VM. I forgot to escape backslashes like I escaped single-quotes, and the VM doesn't like comments because when I took them out it ran fine. So now I can fully appreciate how great this VM is. Thanks!

[daurnimator]

the VM doesn't like comments because when I took them out it ran fine.

It should be fine with comments. Do you have a small sample?

[fpsvogel]

var rets = L.execute('return "testing, testing" -- comment');
console.log(rets[0]);

works as expected, but the following outputs "undefined":

var rets = L.execute(commenttest);
console.log(rets[0]);
...
var commenttest = [
    '-- comment \
    return "testing, testing" '
]

[daurnimator]

the following outputs "undefined":

var rets = L.execute(commenttest); console.log(rets[0]); ... var commenttest = [ '-- comment \ return "testing, testing" ' ]

Preceding a newline with '\' only lets you write a string over multiple lines in javascript, a newline is not actually present in the string. See for yourself by running:

console.log('-- comment \
return "testing, testing" ')

As such, all you're sending to lua is the string -- comment return "testing, testing", which is a single line (that is a comment)

[fpsvogel]

Got it, thanks!