feat(process): process

Author: 836334258

CHANGELOG.md

@@ -3,6 +3,7 @@
 
 ### Features
 
+* **changelog:** chagnelog ([254efb5](https://github.com/836334258/node_practice/commit/254efb50725ed7cc04fd28b2c1c0cb39459284f4))
 * **path:** path ([237dca2](https://github.com/836334258/node_practice/commit/237dca247ff4f1b938fd529c8717295d8217142d))
 
 

package.json

@@ -8,7 +8,8 @@
   },
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1",
-    "version": "conventional-changelog -p angular -i CHANGELOG.md -s && git add CHANGELOG.md"
+    "changelog": "conventional-changelog -p angular -i CHANGELOG.md -s -r 0 && git add CHANGELOG.md",
+    "cz": "cz"
   },
   "keywords": [],
   "author": "",
@@ -27,4 +28,4 @@
       "path": "./node_modules/cz-conventional-changelog"
     }
   }
-}
+}

process/index.ts

@@ -0,0 +1,205 @@
+import path from 'path'
+import process from 'process'
+
+// 由于process是EventEmitter的实例，on事件相当于addListener事件
+
+// 0 node正常结束后会调用beforeExit，如果显式调用process.exit()则不会调用
+process.addListener('beforeExit', (code) => {
+  console.log('Process beforeExit event with code: ', code)
+})
+
+// 目前看起来只要退出就会调用
+process.addListener('exit', (code) => {
+  console.log(`About to exit with code: ${code}`)
+})
+
+// promise里面不止拒绝或解决过一次，就会调用 reject Promise { 'ok' } no ok
+process.on('multipleResolves', (type, promise, value) => {
+  console.error(type, promise, value)
+})
+new Promise((resolve, reject) => {
+  resolve('ok')
+  reject('no ok')
+})
+  .then(console.log)
+  .catch(console.error)
+
+// 捕获promise.reject 方法
+process.addListener('unhandledRejection', (reason, promise) => {
+  console.log('unhandledRejection', reason, promise)
+})
+
+Promise.reject('haha reject')
+
+// 捕获异常，不推荐使用
+process.addListener('uncaughtException', (error, origin) => {
+  console.log('uncaughtException', error, origin)
+})
+
+// 好像和uncaughtException差不多
+process.addListener('uncaughtExceptionMonitor', (error, origin) => {
+  console.log('uncaughtExceptionMonitor', error, origin)
+})
+
+// 会触发uncaughtException事件和uncaughtExceptionMonitor事件
+//  os.setPriority(0,-10)
+
+// 每当 Node.js 触发进程警告时，则会触发 'warning' 事件
+process.addListener('warning', (waring) => {
+  console.log('waring', waring)
+})
+
+// 创建新的 <Worker> 线程后会触发 'worker' 事件。
+process.addListener('worker', (worker) => {
+  console.log('worker', worker)
+})
+
+// 一种信号，暂时没发现用处
+process.addListener('SIGINT',(signal)=>{
+  console.log('signal',signal)
+})
+
+// 导致node立即退出，同时addListener里面的事件也失效
+// process.abort()
+
+// cpu架构 x64
+console.log(process.arch)
+
+// 输入参数 ts-node index.ts a b
+/**
+ * [
+  '/mnt/c/Program Files/nodejs/node_modules/ts-node/dist/bin.js',
+  '/mnt/e/code/test_code/node_practice/process/index.ts',
+  'a',
+  'b'
+]
+ */
+console.log(process.argv)
+
+// node的只读副本
+console.log(process.argv0)
+
+// 改变目录
+process.chdir(path.dirname(__dirname))
+
+// 当前目录
+console.log(process.cwd())
+
+// 会触发waring事件 waring Warning: emitWaring....
+process.emitWarning('emitWaring....')
+
+// 用户环境对象
+console.log(process.env)
+
+// 返回 Node.js 进程启动时传入的一组特定于 Node.js 的命令行选项
+console.log(process.execArgv)
+
+// node可执行文件的绝对路径名
+console.log(process.execPath)
+
+// 设置终止进程code码，默认为0
+process.exitCode=100
+// 终止进程
+// process.exit()
+
+// console.log(process.getActiveResourcesInfo())
+
+// 群组id
+console.log(process.getgid())
+
+// 用户id
+console.log(process.getuid())
+
+console.log(process.hrtime())
+
+// 返回纳秒
+console.log(process.hrtime.bigint())
+
+// 将sigint发送到由pid标识的进程
+process.kill(process.pid,'SIGINT')
+
+
+// 内存使用量
+console.log(process.memoryUsage())
+
+// 会先执行nextTick，然后执行queueMicrotask，除非需要 process.nextTick() 的特定功能，否则请使用 queueMicrotask()。
+queueMicrotask(()=>{
+  console.log('queueMicrotask')
+})
+
+// 将 callback 添加到"下一个滴答队列"
+process.nextTick(()=>{
+  console.log('nextTick')
+})
+
+// pid 434
+console.log('pid',process.pid)
+
+// 平台 linux
+console.log(process.platform)
+
+// 父进程id
+console.log(process.ppid)
+
+// 当前版本相关的元数据
+/**
+ * {
+  name: 'node',
+  sourceUrl: 'https://nodejs.org/download/release/v17.5.0/node-v17.5.0.tar.gz',
+  headersUrl: 'https://nodejs.org/download/release/v17.5.0/node-v17.5.0-headers.tar.gz'
+}
+ */
+console.log(process.release)
+
+/**
+ * 诊断报告
+ * {
+  writeReport: [Function: writeReport],
+  getReport: [Function: getReport],
+  directory: [Getter/Setter],
+  filename: [Getter/Setter],
+  compact: [Getter/Setter],
+  signal: [Getter/Setter],
+  reportOnFatalError: [Getter/Setter],
+  reportOnSignal: [Getter/Setter],
+  reportOnUncaughtException: [Getter/Setter]
+}
+ */
+console.log(process.report)
+
+/**
+ * ReadStream 
+ */
+console.log(process.stdin)
+
+// 运行了几秒 3.124805684
+console.log(process.uptime())
+
+// node版本 v17.5.0
+console.log(process.version)
+
+/**
+ * 列出依赖项
+{
+  node: '17.5.0',
+  v8: '9.6.180.15-node.13',
+  uv: '1.43.0',
+  zlib: '1.2.11',
+  brotli: '1.0.9',
+  ares: '1.18.1',
+  modules: '102',
+  nghttp2: '1.45.1',
+  napi: '8',
+  llhttp: '6.0.4',
+  openssl: '3.0.1+quic',
+  cldr: '40.0',
+  icu: '70.1',
+  tz: '2021a3',
+  unicode: '14.0',
+  ngtcp2: '0.1.0-DEV',
+  nghttp3: '0.1.0-DEV'
+}
+ */
+console.log(process.versions)
+
+