NPM overwrites $TMPDIR

[craigsketchley]

Strangely, NPM overwrites the TMPDIR environment variable (and therefore the result of os.tmpDir()) to the current working directory. This means when running node-lambda deploy as a NPM script in package.json, it fails on the rsync step as the destination directory exists in the folder you're synchronising (causing heaps of file has vanished: type errors).

I can fix this by explicitly setting the TMPDIR variable as I deploy, something like:

  "scripts": {
    "deploy-stage": "TMPDIR=/tmp node-lambda deploy"
  }