maven-build-lifecycle

# Maven Build Lifecycle

Master Maven's build lifecycle including phases, goals, profiles, and build customization for efficient Java project builds.

## Overview

Maven's build lifecycle is a well-defined sequence of phases that execute in order. Understanding the lifecycle is essential for effective build configuration and optimization.

## Default Lifecycle Phases

### Complete Phase Order

```
1.  validate      - Validate project structure
2.  initialize    - Initialize build state
3.  generate-sources
4.  process-sources
5.  generate-resources
6.  process-resources - Copy resources to output
7.  compile       - Compile source code
8.  process-classes
9.  generate-test-sources
10. process-test-sources
11. generate-test-resources
12. process-test-resources
13. test-compile  - Compile test sources
14. process-test-classes
15. test          - Run unit tests
16. prepare-package
17. package       - Create JAR/WAR
18. pre-integration-test
19. integration-test - Run integration tests
20. post-integration-test
21. verify        - Run verification checks
22. install       - Install to local repo
23. deploy        - Deploy to remote repo
```

### Common Phase Commands

```bash
# Compile only
mvn compile

# Compile and run tests
mvn test

# Create package
mvn package

# Install to local repository
mvn install

# Deploy to remote repository
mvn deploy

# Clean and build
mvn clean install

# Skip tests
mvn install -DskipTests

# Skip test compilation and execution
mvn install -Dmaven.test.skip=true
```

## Clean Lifecycle

```
1. pre-clean
2. clean         - Delete target directory
3. post-clean
```

```bash
# Clean build artifacts
mvn clean

# Clean specific directory
mvn clean -DbuildDirectory=out
```

## Site Lifecycle

```
1. pre-site
2. site          - Generate documentation
3. post-site
4. site-deploy   - Deploy documentation
```

```bash
# Generate site
mvn site

# Generate and deploy site
mvn site-deploy
```

## Goals vs Phases

### Executing Phases

```bash
# Execut