Upload files to S3 via node aws-sdk (if aws-cli isn't easily installable)

upload.js

// Put credentials in ~/.aws/credentials like:
//
// [default]
// aws_access_key_id = [key]
// aws_secret_access_key = [secret]

if (process.argv.length !== 5) {
  console.log('Usage: node ./upload.js [filepath] [bucket] [key]')
  process.exit()
}

var fs = require('fs')
var AWS = require('aws-sdk')

var fileStream = fs.createReadStream(process.argv[2])
fileStream.on('error', function (err) {
  if (err) { throw err }
})
fileStream.on('open', function () {
  var s3 = new AWS.S3()
  var req = s3.putObject({
    Bucket: process.argv[3],
    Key: process.argv[4],
    Body: fileStream
  }, function (err) {
    if (err) { throw err }
  })
  req.on('httpUploadProgress', function(progress) {
    console.log('Uploaded ' +
      progress.loaded.toLocaleString() +
      ' ' +
      '(' +
      ((progress.loaded / progress.total) * 100) + '%' +
      ')'
    )
  })
})