vue hello world项目
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const chalk = require('chalk')
const stripAnsi = require('strip-ansi')
const readline = require('readline')
const EventEmitter = require('events')
const { stopSpinner } = require('./spinner')
exports.events = new EventEmitter()
function _log (type, tag, message) {
if (process.env.VUE_CLI_API_MODE && message) {
exports.events.emit('log', {
message,
type,
tag
})
}
}
const format = (label, msg) => {
return msg.split('\n').map((line, i) => {
return i === 0
? `${label} ${line}`
: line.padStart(stripAnsi(label).length + line.length + 1)
}).join('\n')
}
const chalkTag = msg => chalk.bgBlackBright.white.dim(` ${msg} `)
exports.log = (msg = '', tag = null) => {
tag ? console.log(format(chalkTag(tag), msg)) : console.log(msg)
_log('log', tag, msg)
}
exports.info = (msg, tag = null) => {
console.log(format(chalk.bgBlue.black(' INFO ') + (tag ? chalkTag(tag) : ''), msg))
_log('info', tag, msg)
}
exports.done = (msg, tag = null) => {
console.log(format(chalk.bgGreen.black(' DONE ') + (tag ? chalkTag(tag) : ''), msg))
_log('done', tag, msg)
}
exports.warn = (msg, tag = null) => {
console.warn(format(chalk.bgYellow.black(' WARN ') + (tag ? chalkTag(tag) : ''), chalk.yellow(msg)))
_log('warn', tag, msg)
}
exports.error = (msg, tag = null) => {
stopSpinner()
console.error(format(chalk.bgRed(' ERROR ') + (tag ? chalkTag(tag) : ''), chalk.red(msg)))
_log('error', tag, msg)
if (msg instanceof Error) {
console.error(msg.stack)
_log('error', tag, msg.stack)
}
}
exports.clearConsole = title => {
if (process.stdout.isTTY) {
const blank = '\n'.repeat(process.stdout.rows)
console.log(blank)
readline.cursorTo(process.stdout, 0, 0)
readline.clearScreenDown(process.stdout)
if (title) {
console.log(title)
}
}
}
// silent all logs except errors during tests and keep record
if (process.env.VUE_CLI_TEST) {
require('./_silence')('logs', exports)
}