Configuring CI Using Circle CI and Nx
Below is an example of a Circle CI setup, building, and testing only what is affected.
1version: 2.1
2
3orbs:
4 nx: nrwl/nx@1.6.2
5
6jobs:
7 main:
8 docker:
9 - image: cimg/node:lts-browsers
10 steps:
11 - checkout
12 # This line enables distribution
13 # The "--stop-agents-after" is optional, but allows idle agents to shut down once the "e2e-ci" targets have been requested
14 - run: npx nx-cloud start-ci-run --distribute-on="5 linux-medium-js" --stop-agents-after="e2e-ci"
15 - run: npm ci
16
17 - nx/set-shas
18
19 - run: npx nx-cloud record -- nx format:check
20 - run: npx nx affected --base=$NX_BASE --head=$NX_HEAD -t lint test build e2e-ci
21workflows:
22 build:
23 jobs:
24 - main
25Get the Commit of the Last Successful Build
CircleCI can track the last successful run on the main branch and use this as a reference point for the BASE. The Nx Orb provides a convenient implementation of this functionality, which you can drop into your existing CI workflow. Specifically, for push commits, nx/set-shas populates the $NX_BASE environment variable with the commit SHA of the last successful run.
To understand why knowing the last successful build is important for the affected command, check out the in-depth explanation in Orb's docs.
Using CircleCI in a private repository
To use the Nx Orb with a private repository on your main branch, you need to grant the orb access to your CircleCI API. Create an environment variable called CIRCLE_API_TOKEN in the context of the project.
It should be a user token, not the project token.