nx/docs/shared/monorepo-ci-jenkins.md
2022-06-30 15:30:38 -04:00

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# Configuring CI Using Jenkins and Nx
Below is an example of a Jenkins setup for an Nx workspace only building and testing what is affected.
Unlike `GitHub Actions` and `CircleCI`, you don't have the metadata to help you track the last successful run on `main`. In the example below, the base is set to `HEAD~1` (for push) or branching point (for pull requests), but a more robust solution would be to tag a SHA in the main job once it succeeds, and then use this tag as a base. See the [nx-tag-successful-ci-run](https://github.com/nrwl/nx-tag-successful-ci-run) and [nx-set-shas](https://github.com/nrwl/nx-set-shas) (version 1 implements tagging mechanism) repos for more information.
We also have to set `NX_BRANCH` explicitly.
```groovy
pipeline {
agent none
environment {
NX_BRANCH = env.BRANCH_NAME.replace('PR-', '')
}
stages {
stage('Pipeline') {
parallel {
stage('Main') {
when {
branch 'main'
}
agent any
steps {
sh "npm ci"
sh "npx nx workspace-lint"
sh "npx nx format:check"
sh "npx nx affected --base=HEAD~1 --target=lint --parallel=3"
sh "npx nx affected --base=HEAD~1 --target=test --parallel=3"
sh "npx nx affected --base=HEAD~1 --target=build --parallel=3"
}
}
stage('PR') {
when {
not { branch 'main' }
}
agent any
steps {
sh "npm ci"
sh "npx nx workspace-lint"
sh "npx nx format:check"
sh "npx nx affected --base origin/${env.CHANGE_TARGET} --target=lint --parallel=3"
sh "npx nx affected --base origin/${env.CHANGE_TARGET} --target=test --parallel=3 --ci --code-coverage"
sh "npx nx affected --base origin/${env.CHANGE_TARGET} --target=build --parallel=3"
}
}
}
}
}
}
```
The `pr` and `main` jobs implement the CI workflow.
{% nx-cloud-section %}
## Distributed CI with Nx Cloud
In order to use distributed task execution, we need to start agents and set the `NX_CLOUD_DISTRIBUTED_EXECUTION` flag to `true`.
Read more about the [Distributed CI setup with Nx Cloud](/using-nx/ci-overview#distributed-ci-with-nx-cloud).
```groovy
pipeline {
agent none
environment {
NX_BRANCH = env.BRANCH_NAME.replace('PR-', '')
NX_CLOUD_DISTRIBUTED_EXECUTION = true
}
stages {
stage('Pipeline') {
parallel {
stage('Main') {
when {
branch 'main'
}
agent any
steps {
sh "npm ci"
sh "npx nx-cloud start-ci-run"
sh "npx nx workspace-lint"
sh "npx nx format:check"
sh "npx nx affected --base=HEAD~1 --target=lint --parallel=3"
sh "npx nx affected --base=HEAD~1 --target=test --parallel=3 --ci --code-coverage"
sh "npx nx affected --base=HEAD~1 --target=build --parallel=3"
sh "npx nx-cloud stop-all-agents"
}
}
stage('PR') {
when {
not { branch 'main' }
}
agent any
steps {
sh "npm ci"
sh "npx nx-cloud start-ci-run"
sh "npx nx workspace-lint"
sh "npx nx format:check"
sh "npx nx affected --base origin/${env.CHANGE_TARGET} --target=lint --parallel=3"
sh "npx nx affected --base origin/${env.CHANGE_TARGET} --target=test --parallel=3 --ci --code-coverage"
sh "npx nx affected --base origin/${env.CHANGE_TARGET} --target=build --parallel=3"
sh "npx nx-cloud stop-all-agents"
}
}
}
}
}
}
```
{% /nx-cloud-section %}