setup.js

const spaceImport = require('contentful-import')
const exportFile = require('../contentful/export.json')
const inquirer = require('inquirer')
const chalk = require('chalk')
const path = require('path')
const { writeFileSync } = require('fs')

const argv = require('yargs-parser')(process.argv.slice(2))

console.log(`
  To set up this project you need to provide your Space ID
  and the belonging API access tokens.

  You can find all the needed information in your Contentful space under:

  ${chalk.yellow(
    `app.contentful.com ${chalk.red('->')} Space Settings ${chalk.red(
      '->'
    )} API keys`
  )}

  The ${chalk.green('Content Management API Token')}
    will be used to import and write data to your space.

  The ${chalk.green('Content Delivery API Token')}
    will be used to ship published production-ready content in your Gatsby app.

  The ${chalk.green('Content Preview API Token')}
    will be used to show not published data in your development environment.

  Ready? Let's do it! 🎉
`)

const questions = [
  {
    name: 'spaceId',
    message: 'Your Space ID',
    when: !argv.spaceId && !process.env.CONTENTFUL_SPACE_ID,
    validate: input =>
      /^[a-z0-9]{12}$/.test(input) ||
      'Space ID must be 12 lowercase characters',
  },
  {
    name: 'managementToken',
    when: !argv.managementToken,
    message: 'Your Content Management API access token',
  },
  {
    name: 'accessToken',
    when: !argv.accessToken && !process.env.CONTENTFUL_ACCESS_TOKEN_TOKEN,
    message: 'Your Content Delivery API access token',
  },
]

inquirer
  .prompt(questions)
  .then(({ spaceId, managementToken, accessToken }) => {
    const { CONTENTFUL_SPACE_ID, CONTENTFUL_ACCESS_TOKEN } = process.env

    // env vars are given precedence followed by args provided to the setup
    // followed by input given to prompts displayed by the setup script
    spaceId = CONTENTFUL_SPACE_ID || argv.spaceId || spaceId
    managementToken = argv.managementToken || managementToken
    accessToken = CONTENTFUL_ACCESS_TOKEN || argv.accessToken || accessToken

    console.log('Writing config file...')
    const configFiles = [`.env.development`, `.env.production`].map(file =>
      path.join(__dirname, '..', file)
    )

    const fileContents =
      [
        `# All environment variables will be sourced`,
        `# and made available to gatsby-config.js, gatsby-node.js, etc.`,
        `# Do NOT commit this file to source control`,
        `CONTENTFUL_SPACE_ID='${spaceId}'`,
        `CONTENTFUL_ACCESS_TOKEN='${accessToken}'`,
      ].join('\n') + '\n'

    configFiles.forEach(file => {
      writeFileSync(file, fileContents, 'utf8')
      console.log(`Config file ${chalk.yellow(file)} written`)
    })
    return { spaceId, managementToken }
  })
  .then(({ spaceId, managementToken }) =>
    spaceImport({ spaceId, managementToken, content: exportFile })
  )
  .then((_, error) => {
    console.log(
      `All set! You can now run ${chalk.yellow(
        'yarn run dev'
      )} to see it in action.`
    )
  })
  .catch(error => console.error(error))