nodejs编写bash脚本的终极方案分享

#！/bin/bash

# 这里是判断变量var是否等于字符串abc，但是var这个变量并没有声明
if [ "$var" = "abc" ] 
then
   # 如果if判断里是true就在控制台打印 “ not abc”
   echo  " not abc" 
else
   # 如果if判断里是false就在控制台打印 “ abc”
   echo " abc "
fi

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

exec("ls -la", (error, stdout, stderr) => {
    if (error) {
        console.log(`error: ${error.message}`);
        return;
    }
    if (stderr) {
        console.log(`stderr: ${stderr}`);
        return;
    }
    console.log(`stdout: ${stdout}`);
});

// 引入 exec 命令 from child_process 模块
const { execSync } = require("child_process");

// 同步创建了一个hello的文件夹
execSync("mkdir hello");

const shell = require('shelljs');
 
# 删除文件命令
shell.rm('-rf', 'out/Release');
// 拷贝文件命令
shell.cp('-R', 'stuff/', 'out/Release');
 
# 切换到lib目录，并且列出目录下到.js结尾到文件，并替换文件内容（sed -i 是替换文字命令）
shell.cd('lib');
shell.ls('*.js').forEach(function (file) {
  shell.sed('-i', 'BUILD_VERSION', 'v0.1.2', file);
  shell.sed('-i', /^.*REMOVE_THIS_LINE.*$/, '', file);
  shell.sed('-i', /.*REPLACE_LINE_WITH_MACRO.*\n/, shell.cat('macro.js'), file);
});
shell.cd('..');
 
# 除非另有说明，否则同步执行给定的命令。 在同步模式下，这将返回一个 ShellString
#（与 ShellJS v0.6.x 兼容，它返回一个形式为 { code:..., stdout:..., stderr:... } 的对象）。
# 否则，这将返回子进程对象，并且回调接收参数（代码、标准输出、标准错误）。
if (shell.exec('git commit -am "Auto-commit"').code !== 0) {
  shell.echo('Error: Git commit failed');
  shell.exit(1);
}

#!/usr/bin/env zx

await $`cat package.json | grep name`

let branch = await $`git branch --show-current`
await $`dep deploy --branch=${branch}`

await Promise.all([
  $`sleep 1; echo 1`,
  $`sleep 2; echo 2`,
  $`sleep 3; echo 3`,
])

let name = 'foo bar'
await $`mkdir /tmp/${name}

#!/usr/bin/env zx

await $`cat package.json | grep name`

let branch = await $`git branch --show-current`
await $`dep deploy --branch=${branch}`

await Promise.all([
  $`sleep 1; echo 1`,
  $`sleep 2; echo 2`,
  $`sleep 3; echo 3`,
])

let name = 'foo bar'
await $`mkdir /tmp/${name}

npm i -g zx

Node.js >= 14.8.0

#!/usr/bin/env zx
现在您将能够像这样运行您的脚本：

chmod +x ./script.mjs
./script.mjs

zx ./script.mjs

let count = parseInt(await $`ls -1 | wc -l`)
console.log(`Files count: ${count}`)

try {
  await $`exit 1`
} catch (p) {
  console.log(`Exit code: ${p.exitCode}`)
  console.log(`Error: ${p.stderr}`)
}

class ProcessPromise<T> extends Promise<T> {
  readonly stdin: Writable
  readonly stdout: Readable
  readonly stderr: Readable
  readonly exitCode: Promise<number>
  pipe(dest): ProcessPromise<T>
}

await $`cat file.txt`.pipe(process.stdout)

class ProcessOutput {
  readonly stdout: string
  readonly stderr: string
  readonly exitCode: number
  toString(): string
}

cd('/tmp')
await $`pwd` // outputs /tmp

let resp = await fetch('http://wttr.in')
if (resp.ok) {
  console.log(await resp.text())
}

let bear = await question('What kind of bear is best? ')
let token = await question('Choose env variable: ', {
  choices: Object.keys(process.env)
})

function question(query?: string, options?: QuestionOptions): Promise<string>
type QuestionOptions = { choices: string[] }

await sleep(1000)

function nothrow<P>(p: P): P

console.log(chalk.blue('Hello world!'))

import {promises as fs} from 'fs'
let content = await fs.readFile('./package.json')

await $`cd ${os.homedir()} && mkdir example`

$.shell = '/usr/bin/bash'

process.env.FOO = 'bar'
await $`echo $FOO`

let files = [1,2,3]
await $`tar cz ${files}`

#!/usr/bin/env node
import {$} from 'zx'
await $`date`

zx examples/typescript.ts