---
layout: post
title: Finding Affected Builds in Nrwl Nx Monorepo
date: '2021-01-24 00:00 +0000'
subtitle: Affected builds and project names in nx monorepo speed up your development and ci cd process
description: Affected builds and project names in nx monorepo speed up your development and ci cd process
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# Finding Affected Builds in Nrwl Nx Monorepo


> In this article, I will explain how to know which applications or libraries are changed in your [nx monorepo workspace](https://nx.dev).

## First time building Nx Monorepo

First Time if you get the source from repo to your local machine and run

`npm run affected:build`

Notice all of the applications and library projects will build.

Once the build is done Nx will remember which projects are compiled successfully.

Next change the log.service.ts inside logger project in branding service.


## Affected Dependency Graph in Nx Monorepo

Next lets check the dependency graph to know which are the apps and libraries affected by our changes.

Run `npm run affected:dep-graph`

See it is showing we have change `logger` project and it is being used in `customer-user-editor` and `onlinestore-admin` so all of these applications and projects are affected.


Nx can identify which are the projects changed. Which is great!

## Build only Affected Projects in Nx Monorepo

Now you can run below script to just build affected projects only.

Run `npm run affected:build`

Notice it is only building affected projects only.


That give us performance while developing since we only build and test the projects that we change.

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