jenkins

1# Jenkins
2 
3Build, test, and deploy applications using Jenkins, the leading open-source automation server.
4 
5## When to Use This Skill
6 
7Use this skill when:
8- Setting up Jenkins pipelines (declarative or scripted)
9- Configuring Jenkins agents and executors
10- Managing Jenkins plugins and security
11- Creating shared libraries for pipeline reuse
12- Integrating Jenkins with external tools
13 
14## Prerequisites
15 
16- Jenkins server (2.x or later)
17- Admin access to Jenkins
18- Java 11+ on Jenkins server
19- Basic Groovy understanding for pipelines
20 
21## Declarative Pipeline
22 
23Create `Jenkinsfile` in repository root:
24 
25```groovy
26pipeline {
27    agent any
28    
29    environment {
30        DOCKER_REGISTRY = 'registry.example.com'
31        APP_NAME = 'myapp'
32    }
33    
34    stages {
35        stage('Build') {
36            steps {
37                sh 'npm ci'
38                sh 'npm run build'
39            }
40        }
41        
42        stage('Test') {
43            steps {
44                sh 'npm test'
45            }
46            post {
47                always {
48                    junit 'test-results/*.xml'
49                }
50            }
51        }
52        
53        stage('Deploy') {
54            when {
55                branch 'main'
56            }
57            steps {
58                sh './deploy.sh'
59            }
60        }
61    }
62    
63    post {
64        failure {
65            mail to: 'team@example.com',
66                 subject: "Pipeline Failed: ${env.JOB_NAME}",
67…