65 lines
2.0 KiB
Markdown
65 lines
2.0 KiB
Markdown
# natives
|
|
|
|
Do stuff with Node.js's native JavaScript modules
|
|
|
|
## Caveat
|
|
|
|
Dear Beloved User,
|
|
|
|
I feel compelled to give you a word of warning if you are considering
|
|
using this module.
|
|
|
|
This module lets you do some creative things with the JavaScript code
|
|
in Node.js. There are some things here that are basically a recipe
|
|
for memory leaks, or at the very least, being broken with each new
|
|
release of Node, since none of these API surfaces are "technically"
|
|
"supported" by the team managing the Node.js project.
|
|
|
|
This module does not ship a _copy_ of Node's internals. It does its
|
|
thing by using the exposed source code that lives in Node.js itself.
|
|
So, running this on different versions of Node.js will produce
|
|
different results.
|
|
|
|
When your program is broken by changes to Node's internals, or when
|
|
Node changes in such a way that this module becomes fundamentally
|
|
broken, you will likely get little sympathy. Many people in the Node
|
|
community consider this sort of behavior to be unwise and unseemly, if
|
|
not outright hostile and morally wrong.
|
|
|
|
At the very least, you probably just want to run Node with the
|
|
(undocumented!) `--expose-internals` flag, rather than go to such
|
|
lengths.
|
|
|
|
Don't use unless you know what you're doing, or at least, are ok with
|
|
the risks. Don't say I didn't warn you.
|
|
|
|
Eternally Yours in OSS,
|
|
Isaac Z. Schlueter
|
|
|
|
## USAGE
|
|
|
|
```javascript
|
|
var natives = require('natives')
|
|
|
|
// get the source code
|
|
var fsCode = natives.source('fs')
|
|
|
|
// get a evaluated copy of the module
|
|
var fsCopy = natives.require('fs')
|
|
|
|
// you can pass in a whitelist to NOT shim certain things
|
|
var fsCopyWithNativeStreams = natives.require('fs', ['stream'])
|
|
|
|
// note that this is not the same as the "real" fs
|
|
assert(fsCopy !== require('fs'))
|
|
|
|
// but it does have all the same entries
|
|
fsCopy.readFileSync(__filename, 'utf8') // etc
|
|
```
|
|
|
|
## Another Caveat
|
|
|
|
You can't use this to override `require("buffer")` because everything
|
|
depends on `Buffer.isBuffer` working properly, so it's important for
|
|
that one to be given a pass.
|