Nestjs REPL on Nx - nestjs

Question

trying to run repl in Nx, following the tutorial here https://docs.nestjs.com/recipes/repl,
So I have a repl.ts file,
import { repl } from '#nestjs/core';
import { AppModule } from './app/app.module';
async function bootstrap() {
await repl(AppModule);
}
bootstrap();
and if I try to run the repl using nx serve myapp --entryFile repl it gives an error,
> nx run core-service:serve --entryFile=repl
'entryFile' is not found in schema
dependencies:
"#nrwl/nest": "14.7.13",
"#nestjs/core": "9.1.2",

Answer 1

Add your repl.ts beside main.ts
inside your apps/{project}/project.json
on the targets property add this
"repl": { // Add this code
"executor": "#nrwl/webpack:webpack",
"outputs": ["{options.outputPath}"],
"options": {
"target": "node",
"compiler": "tsc",
"outputPath": "dist/apps/project",
"main": "apps/project/src/repl.ts", // take note of this
"tsConfig": "apps/server/tsconfig.app.json",
"assets": []
},
"configurations": {
"production": {
"optimization": true,
"extractLicenses": true,
"inspect": false,
"fileReplacements": [
{
"replace": "apps/project/src/environments/environment.ts",
"with": "apps/project/src/environments/environment.prod.ts"
}
]
}
}
Update the serve property (still on targets)
"repl": {
"buildTarget": "server:repl"
}
Your schema should look like this
{
"$schema": "../../node_modules/nx/schemas/project-schema.json",
"sourceRoot": "apps/project/src",
"projectType": "application",
"targets": {
"build": {...}, // Minimized code
"repl": { // Add this code
"executor": "#nrwl/webpack:webpack",
"outputs": ["{options.outputPath}"],
"options": {
"target": "node",
"compiler": "tsc",
"outputPath": "dist/apps/project",
"main": "apps/project/src/repl.ts", // take note of this
"tsConfig": "apps/server/tsconfig.app.json",
"assets": []
},
"configurations": {
"production": {
"optimization": true,
"extractLicenses": true,
"inspect": false,
"fileReplacements": [
{
"replace": "apps/project/src/environments/environment.ts",
"with": "apps/project/src/environments/environment.prod.ts"
}
]
}
}
},
"serve": {
"executor": "#nrwl/js:node",
"options": {
"buildTarget": "server:build"
},
"configurations": {
"production": {
"buildTarget": "server:build:production"
},
"repl": { // add this on your serve property
"buildTarget": "server:repl"
}
}
},
//
}
You can now run the repl by running
npx nx run project:serve:repl

Answer 2

Update your serve target:
"repl": {
"buildTarget": "<project>:build",
"buildTargetOptions": {
"main": "packages/<project>/src/repl.ts"
}
}
Now you can use npx nx run project:serve:repl to get a REPL that restarts when any of the code changes. Note that the executor breaks some REPL features, such as using control+D to close the REPL.