Node.js API to construct a module programmatically

Asked Apr 17 '16 at 21:16

Active Apr 18 '16 at 04:09

Viewed 74 times

Is there an API in Node.js, perhaps in user-land, that allows you to construct a CommonJS module programmatically, with or without using eval?

I would like my command line app to take the source code of a module as stdin and (re)construct the module in my program.

It would/could be used like:

cat foo.js | mynodeprogram

edited Apr 18 '16 at 04:09

asked Apr 17 '16 at 21:16

Alexander Mills

Where would `require()` load from? – SLaks Apr 17 '16 at 21:19
1

Construct the source code you want, write the code to a temp file and then use `require()` on it to load it. – jfriend00 Apr 17 '16 at 21:21
Isn't that nodejs in repl mode. – randominstanceOfLivingThing Apr 17 '16 at 21:23
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Probably the [`vm` module](https://nodejs.org/dist/latest-v5.x/docs/api/vm.html) – [`vm.runInNewContext()`](https://nodejs.org/dist/latest-v5.x/docs/api/vm.html#vm_vm_runinnewcontext_code_sandbox_options). – Jonathan Lonowski Apr 17 '16 at 21:38
@jfriend00 that's cheating :) is there a way without writing a temp file? – Alexander Mills Apr 17 '16 at 22:32
@SLaks require would come from node, in this case "mynodeprogram" – Alexander Mills Apr 17 '16 at 22:33
But how would it resolve paths? – SLaks Apr 17 '16 at 22:35
it would use the current working directory to resolve paths – Alexander Mills Apr 17 '16 at 22:36
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If you want to do it from memory, then you can just look at the source for `require()` and make your own function that uses code already in memory. I don't really get what you're asking here. You either use `require()` or use some other code loading scheme someone else has written or write your own using `eval()` or `new Function()`. Those are pretty much the choices. – jfriend00 Apr 18 '16 at 00:38
http://stackoverflow.com/a/17585470/1223975 – Alexander Mills Apr 18 '16 at 01:41
I led to the demise of my own question – Alexander Mills Apr 18 '16 at 03:57

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