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April 10, 2022 02:15
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Custom watch script (nodejs, shell, cli)
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| const {watch} = require('fs'); | |
| const {spawn} = require('child_process'); | |
| const { cp } = require('fs/promises'); | |
| // const { watch } = require('fs/promises'); | |
| function run(...args) { | |
| const [prog, ...rest] = args; | |
| const child = spawn(prog, rest); | |
| child.stdout.on('data', data => process.stdout.write(data.toString())); | |
| child.stderr.on('data', data => process.stdout.write(data.toString())); | |
| return new Promise(resolve=>{ | |
| child.on('exit', code=>resolve(code)); | |
| }); | |
| }; | |
| const buildQueue = new Set(['tsc:server', 'tsc:client','cp:public','node:server']) | |
| let nodeServer; | |
| async function build() { | |
| const tasks = { | |
| 'tsc:server': async () => { | |
| process.chdir(__dirname + '/src/server'); | |
| return await run('node', __dirname + '/node_modules/typescript/bin/tsc'); | |
| }, | |
| 'tsc:client': async () => { | |
| process.chdir(__dirname + '/src/client'); | |
| return await run('node', __dirname + '/node_modules/typescript/bin/tsc'); | |
| }, | |
| 'cp:public': async () => { | |
| return await cp(__dirname + '/src/client/public', __dirname + '/_dist/client', {recursive: true}); | |
| }, | |
| 'node:server': async () => { | |
| if (nodeServer) nodeServer.kill(); | |
| process.chdir(__dirname + '/_dist'); | |
| nodeServer = run('node','server.js'); | |
| return 0; | |
| }, | |
| } | |
| for (let taskKey of buildQueue) { | |
| console.log(taskKey); | |
| const res = await tasks[taskKey](); | |
| if ((res ?? 0) !== 0) { break; } | |
| buildQueue.delete(taskKey); | |
| } | |
| } | |
| async function main() { | |
| await build(); | |
| startWatching(); | |
| } | |
| function startWatching() { | |
| let lastTime = 0; | |
| let building = false; | |
| watch(__dirname + '/src', {recursive: true}, async (eventType, filename) => { | |
| if (building || (Date.now() - lastTime < 1000)) return; | |
| lastTime = Date.now(); | |
| building = true; | |
| console.log(filename); | |
| filename = filename.replaceAll('\\', '/'); | |
| if (filename.includes('client/lib')) { buildQueue.add('tsc:client'); } | |
| if (filename.includes('client/public')) { buildQueue.add('cp:public'); } | |
| if (filename.includes('server')) { | |
| buildQueue.add('tsc:server'); | |
| buildQueue.add('node:server'); | |
| } | |
| await build(); | |
| building = false; | |
| }) | |
| } | |
| main(); |
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