sendgrid-mail/lib/cli.js

The easiest way to send mail with sendgrid.

const fs = require('fs')
const os = require('os')
const path = require('path')
const meow = require('meow')
const getStdin = require('get-stdin')
const debug = require('debug')('sendgrid-mail:cli')
const util = require('./util')

const init = async () => {
  const helpText = fs.readFileSync(path.join(__dirname, '../man/doc.1')).toString()
  const fromAddr = process.env.SENDGRID_MAIL_FROM || `${os.userInfo().username}@${os.hostname()}`
  const replyToAddr = process.env.SENDGRID_MAIL_REPLYTO || process.env.REPLYTO || fromAddr

  const cli = meow(helpText,
    {
      flags: {
        apikey: {
          type: 'string',
          alias: 'k',
          default: process.env.SENDGRID_API_KEY
        },
        suppressEmpty: {
          type: 'boolean',
          alias: 'E',
          default: false
        },
        subject: {
          type: 'string',
          alias: 's',
          default: ''
        },
        cc: {
          type: 'string',
          alias: 'c',
          default: ''
        },
        bcc: {
          type: 'string',
          alias: 'b',
          default: ''
        },
        html: {
          type: 'boolean',
          alias: 'h',
          default: false
        },

        // Sendgrid wants from and replyTo
        from: {
          type: 'string',
          default: fromAddr
        },
        replyTo: {
          type: 'string',
          default: replyToAddr
        }
      }
    })

  const body = await getStdin()
  const contentType = cli.flags.html ? 'text/html' : 'text/plain'

  const to = cli.input[0]
  const from = util.parseEmail(cli.flags.from)
  const replyTo = util.parseEmail(cli.flags.replyTo) || from

  const options = {
    // Sendmail-style options
    to: util.parseList(to),
    cc: util.parseList(cli.flags.cc),
    bcc: util.parseList(cli.flags.bcc),
    subject: cli.flags.subject,
    body: body,
    contentType: contentType,
    suppressEmpty: cli.flags.suppressEmpty,

    // Sendgrid API key
    apikey: cli.flags.apikey,

    // Sendgrid requires from, but replyTo is optional
    from: from,
    replyTo: replyTo
  }

  if (options.to.length + options.cc.length + options.bcc.length === 0) {
    process.stdout.write(helpText)
    process.exit(2)
  }

  debug(`command line options: ${JSON.stringify(options, null, 2)}`)

  return options
}

module.exports = {
  init: init
}