Why modules' build.gradle file can work with only namespace declaration?

[khahani]

How can I make such a concise build.gradle file for modules:

android {
    namespace = "com.google.samples.apps.nowinandroid.core.common"
}

Normally I should do this for each module:

android {
    namespace 'androidx.compose.samples.common'
    compileSdk 33

    defaultConfig {
        minSdk 24
    }
    
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_17
        targetCompatibility JavaVersion.VERSION_17
    }
    kotlinOptions {
        jvmTarget = JavaVersion.VERSION_17
    }
}

[SimonMarquis]

You can extract all the common configurations as a Gradle convention plugin.
This is what is used in this project: the conventions plugins are located in build-logic/convention.

For example:
The AndroidLibraryConventionPlugin.kt is registered as nowinandroid.android.library here:

nowinandroid/build-logic/convention/build.gradle.kts

Lines 63 to 66 in 151f877

	register("androidLibrary") {
	id = "nowinandroid.android.library"
	implementationClass = "AndroidLibraryConventionPlugin"
	}

and used like this in an android library module:

nowinandroid/core/common/build.gradle.kts

Lines 16 to 20 in 151f877

	plugins {
	id("nowinandroid.android.library")
	id("nowinandroid.android.library.jacoco")
	id("nowinandroid.android.hilt")
	}