开发Node CLI构建微信小程序脚手架的示例

// 创建项目
mkdir modoo-mini-program
cd modoo-mini-program

// 初始化
lerna init

cd packages
mkdir modoo-script
mkdir modoo-template-mini
mkdir modoo-mini // 安装 modoo-script 依赖用于测试，无其他实际用处

lerna bootstrap // 安装依赖 + npm link

"bin": {
  "modoo-script": "./bin/modoo-script.js"
},

#!/usr/bin/env node
const { program } = require("commander");

program
 .version(require("../package").version) // modoo-script --version
 .usage("<command> [options]")
 // init 命令，床架项目
 .command("init [projectName]", "Init a project with default templete")
 .parse(process.argv); // 解析命令参数

modoo-script init => modoo-script-init
modoo-script build => modoo-script-build

#!/usr/bin/env node

const { program } = require("commander");

program
 .option("--name [name]", "项目名称")
 .option("--description [description]", "项目介绍")
 .option("--framework", "脚手架框架")
 .parse(process.argv);

const args = program.args;
// 获取命令参数
const { name, description, framework } = program;

const projectName = args[0] || name;

......

const inquirer = require('inquirer')

if (typeof conf.description !== 'string') {
   prompts.push({
    type: 'input',
    name: 'description',
    message: '请输入项目介绍！'
   })
}

......

inquirer.prompt(prompts).then(answers => {
  // 整合配置
  this.conf = Object.assign(this.conf, answers);
})

// 一 npm search 查找相应的模版 npm 包
const { execSync } = require("child_process");

module.exports = () => {
 let list = [];
 try {
  const listJSON = execSync(
   "npm search --json --registry http://registry.npmjs.org/ @modoo/modoo-template"
  );
  list = JSON.parse(listJSON);
 } catch (error) {}

 return Promise.resolve(list);
};

// 二 返回 npm 数据
const pkg = require("package-json");
const chalk = require("chalk");
const logSymbols = require("log-symbols");

exports.getBoilerplateMeta = framework => {
 log(
  logSymbols.info,
  chalk.cyan(`您已选择 ${framework} 远程模版, 正在查询该模版...`)
 );

 return pkg(framework, {
  fullMetadata: true
 }).then(metadata => {
  const {
   dist: { tarball },
   version,
   name,
   keywords
  } = metadata;
  log(
   logSymbols.success,
   chalk.green(`已为您找到 ${framework} 远程模版, 请输入配置信息`)
  );

  return {
   tarball,
   version,
   keywords,
   name
  };
 });
};

// 三 下载 npm 包
const got = require("got");
const tar = require("tar");
const ora = require("ora");

const spinner = ora(
  chalk.cyan(`正在下载 ${framework} 远程模板仓库...`)
).start();

const stream = await got.stream(tarball);

fs.mkdirSync(proPath);

const tarOpts = {
 strip: 1,
 C: proPath
};

// 管道流传输下载文件到当前目录
stream.pipe(tar.x(tarOpts)).on("close", () => {
  spinner.succeed(chalk.green("下载远程模块完成！"));
  ......
})

// 四 遍历文件修改配置
const fs = require("fs-extra");

readFiles(
  proPath,
  {
   ignore: [
    ".{pandora,git,idea,vscode,DS_Store}/**/*",
    "{scripts,dist,node_modules}/**/*",
    "**/*.{png,jpg,jpeg,gif,bmp,webp}"
   ],
   gitignore: true
  },
  ({ path, content }) => {
   fs.createWriteStream(path).end(template(content, inject));
  }
 );
 
// 递归读文件
exports.readFiles = (dir, options, done) => {
 if (!fs.existsSync(dir)) {
  throw new Error(`The file ${dir} does not exist.`);
 }
 if (typeof options === "function") {
  done = options;
  options = {};
 }
 options = Object.assign(
  {},
  {
   cwd: dir,
   dot: true,
   absolute: true,
   onlyFiles: true
  },
  options
 );

 const files = globby.sync("**/**", options);
 files.forEach(file => {
  done({
   path: file,
   content: fs.readFileSync(file, { encoding: "utf8" })
  });
 });
};

// 配置替换
exports.template = (content = "", inject) => {
 return content.replace(/@{([^}]+)}/gi, (m, key) => {
  return inject[key.trim()];
 });
};

const { exec } = require("child_process");
const ora = require("ora");
const chalk = require("chalk");

// proPath 项目目录
process.chdir(proPath);

// git init
const gitInitSpinner = ora(
 `cd ${chalk.cyan.bold(projectName)}, 执行 ${chalk.cyan.bold("git init")}`
).start();

const gitInit = exec("git init");
gitInit.on("close", code => {
 if (code === 0) {
  gitInitSpinner.color = "green";
  gitInitSpinner.succeed(gitInit.stdout.read());
 } else {
  gitInitSpinner.color = "red";
  gitInitSpinner.fail(gitInit.stderr.read());
 }
});

// install
let command = "";
if (shouldUseYarn()) {
 command = "yarn";
} else if (shouldUseCnpm()) {
 command = "cnpm install";
} else {
 command = "npm install";
}

log(" ".padEnd(2, "\n"));
const installSpinner = ora(
 `执行安装项目依赖 ${chalk.cyan.bold(command)}, 需要一会儿...`
).start();

exec(command, (error, stdout, stderr) => {
  if (error) {
   installSpinner.color = "red";
   installSpinner.fail(chalk.red("安装项目依赖失败，请自行重新安装！"));
   console.log(error);
  } else {
   installSpinner.color = "green";
   installSpinner.succeed("安装成功");
   log(`${stderr}${stdout}`);
  }
});

const gulp = require('gulp');
const chalk = require('chalk');
const rename = require('gulp-rename');

// 支持 less
gulp.task('less', () => {
 return gulp
  .src('./miniprogram/**/*.less')
  .pipe(less())
  .pipe(postcss()) // 配置在 post.config.js
  .pipe(
   rename((path) => {
    path.extname = '.wxss';
   })
  )
  .pipe(
   gulp.dest((file) => {
    return file.base; // 原目录
   })
  );
});

// 开发环境监听 less
if (env === 'development') {
 gulp.watch(['./miniprogram/**/*.less'], gulp.series('less')).on('change', (path) => {
  log(chalk.greenBright(`File ${path} was changed`));
 });
}


// 一下代码注释掉了，依赖包下载太慢了，这主要负责图片的压缩
const imagemin = require('gulp-imagemin');
const cache = require('gulp-cache'); // 使用缓存

gulp.task('miniimage', () => {
 return gulp
  .src('./miniprogram/**/*.{png,jpe?g,gif,svg}')
  .pipe(
   cache(
    imagemin([
     imagemin.gifsicle({ interlaced: true }),
     imagemin.mozjpeg({ quality: 75, progressive: true }),
     imagemin.optipng({ optimizationLevel: 5 }),
     imagemin.svgo({
      plugins: [{ removeViewBox: true }, { cleanupIDs: false }],
     }),
    ])
   )
  )
  .pipe(
   gulp.dest((file) => {
    return file.base; // 原目录
   })
  );
});