create-base/index.js

快速构建项目基础框架，支持vue/uni-app/后台管理模板等

#!/usr/bin/env node

const fs = require('fs')
const path = require('path')
// Avoids autoconversion to number of the project name by defining that the args
// non associated with an option ( _ ) needs to be parsed as a string.
const argv = require('minimist')(process.argv.slice(2), { string: ['_'] })
const prompts = require('prompts')
const { green, yellow, blue, gray, cyan, magenta, red, reset } = require('kolorist')

const cwd = process.cwd()

const FRAMEWORKS = [
  {
    name: 'vue',
    color: green,
    variants: [
      // { name: 'vue2', color: gray },
      // { name: 'vue', color: cyan },
      { name: 'vue-ts', color: magenta }
    ]
  },
  {
    name: 'uniapp',
    color: yellow,
    variants: [
      // { name: 'uniapp-vue2', color: gray },
      // { name: 'uniapp', color: cyan },
      { name: 'uniapp-ts', color: magenta }
    ]
  }
  // {
  //   name: 'admin',
  //   color: blue,
  //   variants: [{ name: 'admin-element', color: gray }]
  // }
]

const TEMPLATES = FRAMEWORKS.map(f => (f.variants && f.variants.map(v => v.name)) || [f.name]).reduce(
  (a, b) => a.concat(b),
  []
)

const renameFiles = {
  _gitignore: '.gitignore'
}

// 需要过滤的目录/文件名
const filterFiles = ['package.json', 'node_modules']

async function init() {
  let targetDir = argv._[0]
  let template = argv.template || argv.t

  const defaultProjectName = !targetDir ? 'base-project' : targetDir

  let result = {}

  try {
    result = await prompts(
      [
        {
          type: targetDir ? null : 'text',
          name: 'projectName',
          message: reset('项目名称'),
          initial: defaultProjectName,
          onState: state => (targetDir = state.value.trim() || defaultProjectName)
        },
        {
          type: () => (!fs.existsSync(targetDir) || isEmpty(targetDir) ? null : 'confirm'),
          name: 'overwrite',
          message: () =>
            (targetDir === '.' ? '当前目录' : `目标目录 "${targetDir}"`) + ' 不是空的。是否删除现有文件并继续？'
        },
        {
          type: (_, { overwrite } = {}) => {
            if (overwrite === false) {
              throw new Error(red('✖') + ' 操作取消')
            }
            return null
          },
          name: 'overwriteChecker'
        },
        {
          type: () => (isValidPackageName(targetDir) ? null : 'text'),
          name: 'packageName',
          message: reset('包名'),
          initial: () => toValidPackageName(targetDir),
          validate: dir => isValidPackageName(dir) || '无效的 package.json 名称'
        },
        {
          type: template && TEMPLATES.includes(template) ? null : 'select',
          name: 'framework',
          message:
            typeof template === 'string' && !TEMPLATES.includes(template)
              ? reset(`"${template}" 不是有效的模板。请从下面选择`)
              : reset('选择一个框架'),
          initial: 0,
          choices: FRAMEWORKS.map(framework => {
            const frameworkColor = framework.color
            return {
              title: frameworkColor(framework.name),
              value: framework
            }
          })
        },
        {
          type: framework => (framework && framework.variants ? 'select' : null),
          name: 'variant',
          message: reset('选择一个版本'),
          choices: framework =>
            framework.variants.map(variant => {
              const variantColor = variant.color
              return {
                title: variantColor(variant.name),
                value: variant.name
              }
            })
        }
      ],
      {
        onCancel: () => {
          throw new Error(red('✖') + ' 操作取消')
        }
      }
    )
  } catch (cancelled) {
    console.log(cancelled.message)
    return
  }

  // user choice associated with prompts
  const { framework, overwrite, packageName, variant } = result

  const root = path.join(cwd, targetDir)

  if (overwrite) {
    emptyDir(root)
  } else if (!fs.existsSync(root)) {
    fs.mkdirSync(root)
  }

  // determine template
  template = variant || framework || template

  console.log(`\n正在拉取项目文件到 ${root}...`)

  const templateDir = path.join(__dirname, `template-${template}`)

  const write = (file, content) => {
    const targetPath = renameFiles[file] ? path.join(root, renameFiles[file]) : path.join(root, file)
    if (content) {
      fs.writeFileSync(targetPath, content)
    } else {
      copy(path.join(templateDir, file), targetPath)
    }
  }

  const files = fs.readdirSync(templateDir)
  for (const file of files.filter(f => !filterFiles.includes(f))) {
    write(file)
  }

  const pkg = require(path.join(templateDir, `package.json`))

  pkg.name = packageName || targetDir

  write('package.json', JSON.stringify(pkg, null, 2))

  const pkgInfo = pkgFromUserAgent(process.env.npm_config_user_agent)
  const pkgManager = pkgInfo ? pkgInfo.name : 'npm'

  console.log(`\n完成！现在运行下面命令\n`)
  if (root !== cwd) {
    console.log(`  cd ${path.relative(cwd, root)}`)
  }
  switch (pkgManager) {
    case 'yarn':
      console.log('  yarn')
      console.log('  yarn dev')
      break
    default:
      console.log(`  ${pkgManager} install`)
      console.log(`  ${pkgManager} run dev`)
      break
  }
  console.log()
}

function copy(src, dest) {
  const stat = fs.statSync(src)
  if (stat.isDirectory()) {
    copyDir(src, dest)
  } else {
    fs.copyFileSync(src, dest)
  }
}

function isValidPackageName(projectName) {
  return /^(?:@[a-z0-9-*~][a-z0-9-*._~]*\/)?[a-z0-9-~][a-z0-9-._~]*$/.test(projectName)
}

function toValidPackageName(projectName) {
  return projectName
    .trim()
    .toLowerCase()
    .replace(/\s+/g, '-')
    .replace(/^[._]/, '')
    .replace(/[^a-z0-9-~]+/g, '-')
}

function copyDir(srcDir, destDir) {
  fs.mkdirSync(destDir, { recursive: true })
  for (const file of fs.readdirSync(srcDir)) {
    const srcFile = path.resolve(srcDir, file)
    const destFile = path.resolve(destDir, file)
    copy(srcFile, destFile)
  }
}

function isEmpty(path) {
  return fs.readdirSync(path).length === 0
}

function emptyDir(dir) {
  if (!fs.existsSync(dir)) {
    return
  }
  for (const file of fs.readdirSync(dir)) {
    const abs = path.resolve(dir, file)
    // baseline is Node 12 so can't use rmSync :(
    if (fs.lstatSync(abs).isDirectory()) {
      emptyDir(abs)
      fs.rmdirSync(abs)
    } else {
      fs.unlinkSync(abs)
    }
  }
}

/**
 * @param {string | undefined} userAgent process.env.npm_config_user_agent
 * @returns object | undefined
 */
function pkgFromUserAgent(userAgent) {
  if (!userAgent) return undefined
  const pkgSpec = userAgent.split(' ')[0]
  const pkgSpecArr = pkgSpec.split('/')
  return {
    name: pkgSpecArr[0],
    version: pkgSpecArr[1]
  }
}

init().catch(e => {
  console.error(e)
})