Function develop

packages/heml/src/bin/commands/develop.js:17–60

(file, options)

const { log } = console

export default async function develop (file, options) {
  const filepath = path.resolve(file)
  const {
    port = 3000,
    open = false
  } = options

  /** require .heml extention */
  if (!isHemlFile(file)) {
    log(`${error('ERROR')} ${file} must have ${code('.heml')} extention`)
    process.exit(1)
  }

  try {
    const { update, url } = await startDevServer(path.dirname(filepath), port)
    const { html, errors, metadata } = await renderHemlFile(filepath)

    update({ html, errors, metadata })

    if (open) openUrl(url)

    /** watch for file changes */
    gaze(filepath, function (err) {
      if (err) throw err

      this.on('changed', async (changedFile) => {
        const { html, errors, metadata } = await renderHemlFile(filepath)
        update({ html, errors, metadata })
      })

      this.on('deleted', async (changedFile) => {
        log(`${errorBlock(' Error ')} ${code(file)} was deleted. Shutting down.`)
        process.exit()
      })
    })
  } catch (err) {
    if (err.code === 'ENOENT') {
      log(`${errorBlock(' Error ')} ${code(file)} doesn't exist`)
    } else {
      log(`${errorBlock(' Error ')} ${err.message}`)
    }
    process.exit()
  }
}

/**
 * update the cli UI