text: module.exports.command = 'storage-s3'
  
  module.exports.describe = 'Start an S3 storage unit.'
  
  module.exports.builder = function(yargs) {
    return yargs
      .env('STF_STORAGE_S3')
      .strict()
      .option('bucket', {
        describe: 'S3 bucket name.'
      , type: 'string'
      , demand: true
      })
      .option('endpoint', {
        describe: 'S3 bucket endpoint.'
      , type: 'string'
      , demand: true
      })
      .option('port', {
        alias: 'p'
      , describe: 'The port to bind to.'
      , type: 'number'
      , default: process.env.PORT || 7100
      })
      .option('profile', {
        describe: 'AWS credentials profile name.'
      , type: 'string'
      , demand: true
      })
      .epilog('Each option can be be overwritten with an environment variable ' +
        'by converting the option to uppercase, replacing dashes with ' +
        'underscores and prefixing it with `STF_STORAGE_S3_` (e.g. ' +
        '`STF_STORAGE_S3_PROFILE`).')
  }
  
  module.exports.handler = function(argv) {
    return require('../../units/storage/s3')({
      port: argv.port
    , profile: argv.profile
    , bucket: argv.bucket
    , endpoint: argv.endpoint
    })
  }
  