quick-js-cli/lib/utils/logger.js

A CLI that can develop JS faster.

const chalk = require('chalk')
const readline = require('readline')
const padStart = require('string.prototype.padstart')

const format = (label, msg) => {
  return msg.split('\n').map((line, i) => {
    return i === 0
      ? `${label} ${line}`
      : padStart(line, chalk.reset(label).length)
  }).join('\n')
}

const chalkTag = msg => chalk.bgBlackBright.white.dim(` ${msg} `)

exports.log = (msg = '', tag = null) => {
  process.stdout.write(`${msg}\n`)
}

exports.error = (msg, tag = null) => {
  console.error(format(chalk.bgRed(' ERROR ') + (tag ? chalkTag(tag) : ''), chalk.red(msg)))
  if (msg instanceof Error) {
    console.error(msg.stack)
  }
}

exports.warn = (msg, tag = null) => {
  console.warn(format(chalk.bgYellow.black(' WARN ') + (tag ? chalkTag(tag) : ''), chalk.yellow(msg)))
}

exports.clearConsole = title => {
  if (process.stdout.isTTY) { // 在用户bash里面
    readline.cursorTo(process.stdout, 0, 0)
    readline.clearScreenDown(process.stdout)
    if (title) {
      process.stdout.write(title)
    }
  }
}