shell.exec('export NODE_OPTIONS=--max-old-space-size=4096') doesn't work

[ihaichao]

Node version (or tell us if you're using electron or some other framework):

v10.15.0

ShellJS version (the most recent version/Github branch you see the bug on):

0.8.3

Operating system:

macOS Mojave 10.14.6

Description of the bug:

shell.exec('export NODE_OPTIONS=--max-old-space-size=4096') should set the max memory for Node to 4096, but it doesn't work

Example ShellJS command to reproduce the error:

import shell from 'shelljs';
import v8 from 'v8'

if (shell.exec('export NODE_OPTIONS=--max-old-space-size=4096').code !== 0) {
  shell.exit(1);
}

const validSize = v8.getHeapStatistics().total_available_size / 1024 / 1024

console.log(validSize)

[nfischer]

Try shell.env.NODE_OPTIONS = '--max-old-space-size=4096' instead. However, I'm not sure node supports setting this variable after startup (but that's out of the scope of ShellJS).