Loopback4 build with watch takes long

Question

I am using Loopback4 to develop api in Node.

I was using the instruction given to build with watch using nodemon

It worked, but it was getting slow, like about 15 seconds in my case.

I search for other other solution and came up with idea of using Turborepo and the nodemon solution.

I wanted to know if there are better solutions or any issues with it

Gist of the solution

run build in watch mode and restart the dev server if js files in dist folder change
use Turbo repo to run these build and restart server tasks

Steps

Setup build and watch with nodemon as described in the thread you should have something like this in the script

  "scripts": {
   "dev:server:watch": "nodemon server.js"
  }

 // watch src folder
 // ignore dist
 // ext only ts files
 // npm start to start the dev server on any changes to the files
 "nodemonConfig": {
   "verbose": true,
   "watch": [
     "src/"
    ],
    "ignore": [
      "dist/*" 
    ],
    "ext": "ts",
    "exec": "npm start"
 }

Install turbo build system

yarn add turbo --dev

Update nodemon config to restart server on changes in js files in dist folder after build step

 "nodemonConfig": {
    "verbose": true,
    "watch": [
      "./dist/"
    ],
    "ext": "js",
    "exec": "yarn run start"
  },

Add turbo.json

{
    "pipeline": {
        "dev": {
            "dependsOn": ["build:watch", "dev:server:watch"]
        },
        "build:watch": {
            "outputs": [
                ".dist/**"
            ]
        },
        "lint": {
            "outputs": []
        }
    }
}

Add dev script in package.json "scripts"

 "dev": "turbo run dev",

Run

 yarn run dev

This seems to have reduced the build times to about 3 seconds

Can anyone confirm if this is an acceptable solution, points out any issues

Thanks

Loopback4 build with watch takes long

0 Answers0