Jenkins

A Jenkinsfile describes a declarative pipeline.

Skeleton

pipeline { ... }: Top-level block
agent any: Run on any agent
stages { stage("Build") { ... } }: Define stages
steps { sh "make" }: Shell steps
environment { KEY = "v" }: Env vars

Post & control

post { always { ... } }: Run after stages
when { branch "main" }: Conditional stage
parallel { ... }: Run stages in parallel
input "Deploy?": Manual gate

Credentials

withCredentials([...]) { }: Inject secrets
credentials("id"): Reference a credential
archiveArtifacts "dist/**": Save build output