What are all of the Maven Command Line Options?

When using Maven for project management and building, various command-line options can be used to specify different behaviors or execute different tasks. Here are some common Maven command-line options:

1. mvn clean This command cleans the project's target directory, removing all previously compiled files. It is commonly used to ensure a clean build by starting from a fresh state.

2. mvn compile This command compiles the project's source code. When executed, Maven compiles the Java files in the src/main/java directory.

3. mvn test This command runs the application's test code, compiling and executing the tests. By default, it compiles and runs tests in the src/test/java directory.

4. mvn package Running this command generates packaged files (such as JAR or WAR) in the project's target directory, based on the project configuration. This command encompasses the full compilation and testing process.

5. mvn install This command installs the project's package into the local Maven repository, enabling other projects to depend on it. It is typically used in multi-module projects to ensure dependencies are installed and available.

6. mvn deploy This command deploys the package to a remote repository, which is essential for sharing the final product with other developers or deploying to a production environment.

7. mvn verify This command verifies the quality of the package after integration tests have been executed.

8. -D This option sets system property values. For example, mvn test -Dtest=MyTest runs only the unit test named MyTest.

9. -X This option provides detailed output of Maven's execution process, useful for debugging. It helps developers understand Maven's behavior in detail.

10. -P This option specifies different build configuration profiles for the project. For example, you might define multiple profiles for different environments (development, testing, production).

These options can be used individually or combined to achieve complex build tasks. For instance, to re-test and package a project in a clean environment, use the command mvn clean test package.