Lerna脚手架搭建(十一)：入参检查和 debug 模式开发

一、步骤 👈

1. 在 core/cli/ 目录下执行命令 cnpm i -S minimist 安装 minimist 库；
2. 编辑 core/cli/lib/index.js 文件，添加 checkInputArgs 方法，内容如下：

'use strict';

module.exports = core;

const semver = require('semver');
const colors = require('colors/safe');
const userHome = require('user-home');
const pathExists = require('path-exists').sync;
const log = require('@xuven-cli-dev/log');

const constant = require('./const');
const pkg = require('../package.json');

function core() {
    try {
        checkPkgVersion();
        checkNodeVersion();
        checkRoot();
        checkUserHome();
        checkInputArgs();
        log.verbose('debug', 'test debug log');
    } catch (e) {
        log.error(e.message);
    }
}

function checkInputArgs() {
    const minimist = require('minimist');
    const args = minimist(process.argv.slice(2));
    console.log(args)
}

function checkUserHome() {
    if (!userHome || !pathExists(userHome)) {
        throw new Error(colors.red('当前登录用户主目录不存在！'));
    }
}

function checkRoot() {
    const rootCheck = require('root-check');
    rootCheck();
}

function checkNodeVersion() {
    const currentVersion = process.version;
    const lowestVersion = constant.LOWEST_NODE_VERSION;
    if (!semver.gte(currentVersion, lowestVersion)) {
        throw new Error(colors.red(`xuven-cli-dev 需要安装 v${lowestVersion} 以上版本的 Node.js`));
    }
}

function checkPkgVersion() {
    log.info('cli', pkg.version);
}

3. 分别执行 xuven-cli-dev 和 xuven-cli-dev --debug 命令，查看输出结果：
   
4. 编辑 core/cli/lib/index.js 文件，内容如下：

'use strict';

module.exports = core;

const semver = require('semver');
const colors = require('colors/safe');
const userHome = require('user-home');
const pathExists = require('path-exists').sync;
const log = require('@xuven-cli-dev/log');

const constant = require('./const');
const pkg = require('../package.json');

let args;

function core() {
    try {
        checkPkgVersion();
        checkNodeVersion();
        checkRoot();
        checkUserHome();
        checkInputArgs();
        log.verbose('debug', 'test debug log');
    } catch (e) {
        log.error(e.message);
    }
}

function checkInputArgs() {
    const minimist = require('minimist');
    args = minimist(process.argv.slice(2));
    checkArgs();
}

function checkArgs() {
    if (args.debug) {
        process.env.LOG_LEVEL = 'verbose';
    } else {
        process.env.LOG_LEVEL = 'info';
    }
    log.level = process.env.LOG_LEVEL;
}

function checkUserHome() {
    if (!userHome || !pathExists(userHome)) {
        throw new Error(colors.red('当前登录用户主目录不存在！'));
    }
}

function checkRoot() {
    const rootCheck = require('root-check');
    rootCheck();
}

function checkNodeVersion() {
    const currentVersion = process.version;
    const lowestVersion = constant.LOWEST_NODE_VERSION;
    if (!semver.gte(currentVersion, lowestVersion)) {
        throw new Error(colors.red(`xuven-cli-dev 需要安装 v${lowestVersion} 以上版本的 Node.js`));
    }
}

function checkPkgVersion() {
    log.info('cli', pkg.version);
}

5. 执行 xuven-cli-dev 命令，查看输出：
   
6. 删除 log.verbose('debug', 'test debug log'); 行。