fs.copySync: Error: EPERM: operation not permitted, unlink

[monolithed]

let from = 'file.txt'
let to = '/tmp/'

fs.copySync(from, to); // error
fs.copySync(config, cache, () => { console.log('done') }); // no error, no file
fs.copy(from, to); // ok

from

-rw-r--r--    1 a.abashkin  staff   862 18 ноя 17:35 test.txt

to

drwxr-x---  138 a.abashkin  staff  4692 18 ноя 20:03 ..

The problem is that I cannot copy a file to directory (file to file is ok).

 @qa:npm-cache coping config /Users/a.abashkin/workspace/mail.ru/@qa/npm-cache/test.txt => /var/folders/0y/jg1cdcj50zv2vjsjzxtsfhqc0000gp/T/b68872c30295c440b0dc28c224bb9c3e +3ms
fs.js:988
  return binding.unlink(pathModule._makeLong(path));
                 ^

Error: EPERM: operation not permitted, unlink '/var/folders/0y/jg1cdcj50zv2vjsjzxtsfhqc0000gp/T/b68872c30295c440b0dc28c224bb9c3e'
    at Object.fs.unlinkSync (fs.js:988:18)
    at copyFileSync (/Users/a.abashkin/workspace/mail.ru/@qa/npm-cache/node_modules/fs-extra/lib/copy-sync/copy-file-sync.js:12:10)
    at Object.copySync (/Users/a.abashkin/workspace/mail.ru/@qa/npm-cache/node_modules/fs-extra/lib/copy-sync/copy-sync.js:40:7)
    at Cache.copyConfig (/Users/a.abashkin/workspace/mail.ru/@qa/npm-cache/index.js:257:6)
    at Cache.installModules (/Users/a.abashkin/workspace/mail.ru/@qa/npm-cache/index.js:212:8)
    at Cache.setCache (/Users/a.abashkin/workspace/mail.ru/@qa/npm-cache/index.js:345:8)
    at request.response (/Users/a.abashkin/workspace/mail.ru/@qa/npm-cache/index.js:327:19)
    at Request.request.on.response (/Users/a.abashkin/workspace/mail.ru/@qa/npm-cache/utils/request.js:47:4)
    at emitOne (events.js:96:13)
    at Request.emit (events.js:188:7)

supporting information:

• npm -v prints: 3.10.8
• node -v prints: v7.0.0
• npm config get registry prints:
• Windows, OS X/macOS, or Linux?: Darwin

[RyanZim]

fs-extra does not support copying a file to a directory, you must specify directory/newFileName.txt.

Copying to a directory is implicit behavior since you're not actually specifying the destination, just the destination directory.

Quoting @jprichardson:

I believe that we as programmers should make our intentions explicit as writing code is easy but going back and reading code is hard.

So yeah, this is working as intended.

[misterbrownlee]

This is what I did:
https://gist.github.com/misterbrownlee/2e1ad4d1a4be09e24abc4c6004f591db