metatags/bin/cli/build.js

Ensure your HTML is previewed beautifully across social networks

'use strict'

const Build = require('github-build')

const { jobUrl, repo, sha } = require('ci-env')

const MESSAGE = {
  START: 'Checking URLs availability…',
  PASS: 'Yours links are fine',
  FAIL: 'Something is wrong in your links',
  ERROR: 'Uh, something unexpected happened'
}

const EXIT_CODE_METHOD_MAPPER = {
  0: 'pass',
  1: 'fail'
}

const token =
  process.env.gh_token ||
  process.env.GH_TOKEN ||
  process.env.github_token ||
  process.env.GITHUB_TOKEN ||
  process.env.metatags_github_token ||
  process.env.metatags_GITHUB_TOKEN

const meta = {
  repo,
  sha,
  token,
  label: 'metatags',
  description: MESSAGE.START,
  url: jobUrl
}

const noopBuild = {
  start: () => Promise.resolve(),
  pass: () => Promise.resolve(),
  fail: () => Promise.resolve(),
  error: () => Promise.resolve()
}

const handleError = err => {
  if (err.status !== 404) {
    const message = `\n\nCould not add github status (${err.status}): ${err.error.message}`
    console.error(message)
  }
}

const createBuild = build => ({
  pass: () => build.pass(MESSAGE.PASS).catch(handleError),
  fail: () => build.fail(MESSAGE.FAIL).catch(handleError),
  error: () => build.error(MESSAGE.ERROR).catch(handleError),
  start: () => build.start(MESSAGE.START).catch(handleError)
})

const createExit = build => async ({ buildCode = 0, exitCode = buildCode }) => {
  const method = EXIT_CODE_METHOD_MAPPER[buildCode] || 'error'
  await build[method]()
  process.exit(exitCode)
}

const build = createBuild(token ? new Build(meta) : noopBuild)
build.exit = createExit(build)

module.exports = build