blob: b5057a2ff50bbb90f6eeab42e09dd20f0c1c9614 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
|
<!-- This Source Code Form is subject to the terms of the Mozilla Public
- License, v. 2.0. If a copy of the MPL was not distributed with this
- file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
Module provides API to access, set and unset environment variables via exported
`env` object.
var { env } = require('api-utils/environment');
You can get the value of an environment variable, by accessing property that
has name of desired variable:
var PATH = env.PATH;
You can check existence of an environment variable by checking if property with
such variable name exists:
console.log('PATH' in env); // true
console.log('FOO' in env); // false
You can set value of an environment variable by setting a property:
env.FOO = 'foo';
env.PATH += ':/my/path/'
You can unset environment variable by deleting a property:
delete env.FOO;
## Limitations ##
There is no way to enumerate existing environment variables, also `env`
won't have any enumerable properties:
console.log(Object.keys(env)); // []
Environment variable will be unset, show up as non-existing if it's set
to `null`, `undefined` or `''`.
env.FOO = null;
console.log('FOO' in env); // false
env.BAR = '';
console.log(env.BAR); // undefined
|
