Gradle multi-project builds

Gradle multi-project builds allow you to define multiple projects within a single build, where each project is organized into its own subdirectory and has its own build script. This can be useful when you have a large codebase with many related components that need to be built and managed together.

Here's an example of a multi-project build with two sub-projects, projectA and projectB:

scss
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allprojects {
    repositories {
        mavenCentral()
    }
}

subprojects {
    apply plugin: 'java'

    dependencies {
        compile group: 'junit', name: 'junit', version: '4.12'
    }
}

project(':projectA') {
    dependencies {
        compile project(':projectB')
    }
}
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In this example, the allprojects block is used to define a configuration that applies to all projects in the build. In this case, the configuration sets the Maven Central repository as the source for dependencies.

The subprojects block is used to define a configuration that applies to all sub-projects in the build. In this case, the configuration applies the java plugin and adds JUnit 4.12 as a dependency.

Finally, the project(':projectA') block is used to define a configuration for the projectA sub-project. In this case, the configuration adds projectB as a dependency.

To build the projects, you can run the ./gradlew build command from the root directory of the multi-project build. Gradle will automatically build each sub-project and ensure that all dependencies are resolved and built in the correct order.

In conclusion, Gradle multi-project builds provide a convenient way to manage large codebases with multiple related components. They allow you to organize your projects into sub-projects, define dependencies between the projects, and build everything together as a single unit.