🐣 portz: init

package.json

@@ -36,6 +36,7 @@
     "packages/pifs",
     "packages/pkgu",
     "packages/portu",
+    "packages/portz",
     "packages/r11y",
     "packages/ramdsk",
     "packages/rebox/*",
@@ -86,6 +87,8 @@
     "ws": "^7.3.1"
   },
   "scripts": {
+    "service": "echo $PORT",
+    "app": "echo $PORT $PORT_SERVICE",
     "start": "packages/nextools/start-preset/src/cli/index.js"
   },
   "start": {

packages/portz/license.md

@@ -0,0 +1,21 @@
+# The MIT License (MIT)
+
+Copyright (c) 2021–present NexTools
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

packages/portz/package.json

@@ -0,0 +1,29 @@
+{
+  "name": "portz",
+  "version": "0.0.0",
+  "description": "Service port registry and dependency queue manager",
+  "keywords": [],
+  "main": "src/index.ts",
+  "bin": "src/cli.ts",
+  "repository": "nextools/metarepo",
+  "license": "MIT",
+  "engines": {
+    "node": ">=12.13.0"
+  },
+  "publishConfig": {
+    "access": "public"
+  },
+  "dependencies": {
+    "@babel/runtime": "^7.14.0",
+    "commander": "^7.2.0",
+    "dleet": "^2.0.1",
+    "pifs": "^2.0.0",
+    "portu": "^0.2.0",
+    "sleap": "^0.1.0",
+    "unchunk": "^0.2.0"
+  },
+  "devDependencies": {
+    "@types/tape": "^4.2.34",
+    "tape": "^5.0.0"
+  }
+}

packages/portz/readme.md

@@ -0,0 +1,90 @@
+# portz ![npm](https://flat.badgen.net/npm/v/portz)
+
+Service port registry and dependency queue manager.
+
+Allows to run services concurrently respecting cross-dependencies by waiting for TCP port to become in use on `0.0.0.0` interface.
+
+## Install
+
+```sh
+$ yarn add portz
+```
+
+## Usage
+
+### API
+
+```ts
+type TStartServerOptions = {
+  fromPort: number,
+  toPort: number
+}
+
+const startServer: (options: TStartServerOptions) => Promise<() => Promise<void>>
+```
+
+```ts
+type TRegisterServiceOptions = {
+  name: string,
+  deps?: string[]
+}
+
+type TRegisterServiceResult = {
+  port: number,
+  deps?: {
+    [k: string]: number
+  },
+}
+
+const registerService: (options: TRegisterServiceOptions) => Promise<TRegisterServiceResult>
+```
+
+```ts
+const unregisterService: (name: string) => Promise<void>
+```
+
+```ts
+import { startServer, registerService } from 'portz'
+
+const stopServer = await startServer({
+  fromPort: 3000,
+  toPort: 4000
+})
+
+console.log(
+  await Promise.all([
+    registerService({ name: 'foo', deps: ['bar'] }),
+    registerService({ name: 'bar' }),
+    registerService({ name: 'baz', deps: ['foo', 'bar'] }
+  ])
+)
+/*
+[
+  { port: 3001, deps: { bar: 3000 } },
+  { port: 3000 },
+  { port: 3002, deps: { foo: 3001, bar: 3000 } }
+]
+*/
+
+await stopServer()
+```
+
+### CLI
+
+```json
+{
+  "scripts": {
+    "foo": "echo $PORT",
+    "bar": "echo $PORT $PORT_FOO"
+  }
+}
+```
+
+```sh
+portz start --range 3000:4000
+```
+
+```sh
+portz register --name foo -- npm run foo
+portz register --name bar --deps foo -- npm run bar
+```

packages/portz/src/cli.ts

@@ -0,0 +1,109 @@
+#!/usr/bin/env node
+import { spawn } from 'child_process'
+import { program } from 'commander'
+import { version } from '../package.json'
+import { registerService } from './register-service'
+import { startServer } from './start-server'
+import { unregisterService } from './unregister-service'
+
+type TSignalMap = {
+  [k in NodeJS.Signals]?: number
+}
+
+const signals: TSignalMap = {
+  SIGHUP: 1,
+  SIGINT: 2,
+  SIGTERM: 15,
+}
+
+program.version(version)
+
+program
+  .command('register')
+  .description('register service through portz server')
+  .requiredOption('-n, --name [name]', 'service name')
+  .option('-d, --deps <name...>', 'dependency name')
+  .action(async ({ name, deps }) => {
+    const result = await registerService({ name, deps })
+    const dashDashArgIndex = program.args.findIndex((arg) => arg === '--')
+
+    if (dashDashArgIndex === -1) {
+      throw new Error('Arguments to spawn a process are required')
+    }
+
+    const spawnCommand = program.args[dashDashArgIndex + 1]
+    const spawnArgs = program.args.slice(dashDashArgIndex + 2)
+
+    const depsEnv: { [k: string]: string } = {}
+
+    if (result.deps != null) {
+      for (const [name, port] of Object.entries(result.deps)) {
+        depsEnv[`PORT_${name.toUpperCase()}`] = String(port)
+      }
+    }
+
+    const childProcess = spawn(spawnCommand, spawnArgs, {
+      stdio: 'inherit',
+      env: {
+        ...process.env,
+        ...depsEnv,
+        PORT: String(result.port),
+      },
+    })
+
+    childProcess.on('error', async (err) => {
+      console.error(err)
+      await unregisterService(name)
+      process.exit(1)
+    })
+
+    const kill = async (signal: NodeJS.Signals) => {
+      await unregisterService(name)
+      console.log('\nbye')
+      // https://github.com/npm/cli/issues/1591
+      // https://nodejs.org/api/process.html#process_exit_codes
+      process.exit(128 + signals[signal]!)
+    }
+
+    process.on('SIGTERM', kill)
+    process.on('SIGINT', kill)
+    process.on('SIGHUP', kill)
+  })
+
+program
+  .command('unregister')
+  .description('unregister service through portz server')
+  .requiredOption('-n, --name [name]', 'service name')
+  .action(({ name }) => unregisterService(name))
+
+program
+  .command('start')
+  .description('start portz server')
+  .requiredOption('-r, --range <from:to>', 'port range, separated by :', (value) => value.split(':'))
+  .action(async ({ range }) => {
+    const stopServer = await startServer({
+      fromPort: range[0],
+      toPort: range[1],
+    })
+
+    const kill = async (signal: NodeJS.Signals) => {
+      await stopServer()
+      console.log('\nbye')
+      // https://github.com/npm/cli/issues/1591
+      // https://nodejs.org/api/process.html#process_exit_codes
+      process.exit(128 + signals[signal]!)
+    }
+
+    process.on('SIGTERM', kill)
+    process.on('SIGINT', kill)
+    process.on('SIGHUP', kill)
+
+    console.log('portz server is up and ready')
+  })
+
+program
+  .parseAsync(process.argv)
+  .catch((err) => {
+    console.error(err)
+    process.exit(1)
+  })

packages/portz/src/get-free-port.ts

@@ -0,0 +1,20 @@
+import { isPortFree } from 'portu'
+
+export const getFreePort = async (from: number, to: number, skipPorts: number[]): Promise<number> => {
+  const _from = Math.max(1, from)
+  const _to = Math.min(65535, to)
+
+  for (let port = _from; port <= _to; port++) {
+    if (skipPorts.includes(port)) {
+      continue
+    }
+
+    const isFree = await isPortFree(port, '0.0.0.0')
+
+    if (isFree) {
+      return port
+    }
+  }
+
+  throw new Error(`Unable to find free port within ${from}-${to} range`)
+}

packages/portz/src/get-socket-path.ts

@@ -0,0 +1,17 @@
+import { tmpdir } from 'os'
+import path from 'path'
+import { realpath } from 'pifs'
+
+let socketPath: null | string = null
+
+export const getSocketPath = async () => {
+  if (socketPath !== null) {
+    return socketPath
+  }
+
+  const tmpDir = await realpath(tmpdir())
+
+  socketPath = path.join(tmpDir, 'portz.sock')
+
+  return socketPath
+}

packages/portz/src/index.ts

@@ -0,0 +1,4 @@
+export * from './start-server'
+export * from './register-service'
+export * from './unregister-service'
+export type { TRegisterServiceOptions, TRegisterServiceResult } from './types'

packages/portz/src/register-service.ts

@@ -0,0 +1,38 @@
+import { once } from 'events'
+import http from 'http'
+import type { IncomingMessage } from 'http'
+import { unchunkJson } from 'unchunk'
+import { getSocketPath } from './get-socket-path'
+import type { TRegisterServiceOptions } from './types'
+
+type TRegisterService = {
+  <T extends string>(options: TRegisterServiceOptions & { deps: T[] }): Promise<{ port: number, deps: { [k in T]: number } }>,
+  (options: TRegisterServiceOptions): Promise<{ port: number }>,
+}
+
+export const registerService: TRegisterService = async (options: any) => {
+  const socketPath = await getSocketPath()
+  const data = JSON.stringify(options)
+
+  const req = http.request({
+    method: 'POST',
+    path: '/register',
+    socketPath,
+    headers: {
+      'Content-Type': 'application/json',
+    },
+  })
+
+  req.write(data)
+  req.end()
+
+  const [res] = await once(req, 'response') as [IncomingMessage]
+
+  if (res.statusCode !== 200) {
+    throw new Error(res.statusMessage)
+  }
+
+  const result = await unchunkJson<any>(res)
+
+  return result
+}