Cannot use harmony switches on the command line

[s-a]

Cannot use harmony switches on the command line

[s-a]

This goes conform to the current command line description at https://github.com/s-a/iron-node#debug-session. So far there is no mechanism to pass v8 switches via commandline,

Not tried yet but one of this should do the job as described at https://iojs.org/api/v8.html#v8_setflagsfromstring_string:

var v8 = require('v8');
v8.setFlagsFromString('--harmony-arrow-functions');

var flags = require('v8-flags').flags;
flags.harmony_arrow_functions(true);

Available flags are described at: https://github.com/thlorenz/v8-flags/blob/master/flags-0.11.md.
But cannot find harmony-arrow-functions and no time today for further research. Can you investigate further?

[cscalfani]

Unfortunately, neither worked. And BTW, the name of the flag has underscores not dashes. (That confused me too.)

Any ETA on passing V8 flags via command line?

[s-a]

Not really,
forthcoming feature is a Plugin system which i' m currently testing against a dark ui theme.
From a plugin you could set up such v8 flags if they would work. Have you tried a flag which is listed at https://github.com/thlorenz/v8-flags/blob/master/flags-0.11.md?

[s-a]

Seems they solved the problem. Can you try to setup v8 and then requiere your es6 code via separate js file?

electron/electron#2118

[s-a]

@cscalfani I got it

I will build something that solves this issue. as a workaround you can put this line into the app ready event.

app.commandLine.appendSwitch('js-flags', '--harmony-arrow-functions');

[s-a]

@cscalfani https://github.com/s-a/iron-node/releases/tag/v1.5.22

Please let us know if this works for you.

[cscalfani]

Thank you!!! I'm excited to use this but I have a couple of questions that the docs don't quite answer.

First off, the doc say that on OSX I'm looking for the iron-node directory under ~/Library/Application Support. There's already directory there called iron-node-app. Is this the directory you were referring to or do I need to create the other directory?

Second question, can you provide the example format for the .iron-node.js file (preferably in the documentation so others can benefit from this)?

Thanks again for working so quickly on this.

[s-a]

You need to create the new folder. iron-node-app is some thing electron related. https://github.com/s-a/iron-node/blob/master/.iron-node.js is linked in the docs, but I have just seen that this is not clear enough 👍

[cscalfani]

Works!!! Thanks.