Edit online your configuration!

Try it on Kotlin Playground https://pl.kotl.in/9oXsIoDNS

or edit the sample below

Build single module

Click "run" (on the right) to see the preview!


fun main() {
    val modules = config.modules.toProjectModuleList(config)
    println("This script will create the following ${modules.size} module${if (modules.size == 1) "" else "s"}:")
    modules.forEach {
        println(
            """|
               |Create module [${it.templateName}] ${it.moduleNameParts.joinToString(" ") { it.capitalize() }}
               | - destinationDir: ${it.destinationDirPart}
               | - packageName:    ${it.packageName}
               | - gradlePath:     ${it.gradlePath}""".trimMargin()
        )
    }
    println("\nDo you want to continue?")

}
//sampleStart
val config = ScriptGradleModuleConfig(
    gradleConfig = GradleConfig(
        packagePrefix = "com.github.owner.projectname",
        templatesDirPath = "templates",
        settingsGradleFilename = "settings.gradle.kts",
        dependenciesFilename = "buildSrc/src/main/kotlin/Dependencies.kt",
        dependenciesPrefix = "module",
    ),
    modules = listOf(LibAndroid("my-lib")),
    logLevel = 1,
    hasPrompt = true,
    writeOnDisk = true,
    forceNamingConvention = false,
)
//sampleEnd

//
// ScriptGradleModuleConfig.kt
//

data class ScriptGradleModuleConfig(
    val gradleConfig: GradleConfig = GradleConfig("", "", "", "", ""),
    val modules: List<GradleComponent> = emptyList(),
    val logLevel: Int = -1,
    val hasPrompt: Boolean = false,
    val writeOnDisk: Boolean = false,
    val forceNamingConvention: Boolean = false,
)

data class GradleConfig(
    val packagePrefix: String,
    val templatesDirPath: String,
    val settingsGradleFilename: String,
    val dependenciesFilename: String,
    val dependenciesPrefix: String,
)

//
// GradleComponent.kt
//

sealed class GradleComponent(
    open val gradleName: String,
    open val packageNamePart: String?,
    open val extra: Map<String, Any> = emptyMap(),
)

// GradleComponents

data class Group(
    override val gradleName: String,
    val modules: List<GradleComponent>,
    override val packageNamePart: String? = gradleName.toPackageName(),
    override val extra: Map<String, Any> = emptyMap(),
) : GradleComponent(gradleName, packageNamePart, extra)

sealed class GradleModule(
    gradleName: String,
    packageNamePart: String?,
    extra: Map<String, Any>,
    open val templateName: String,
) : GradleComponent(gradleName, packageNamePart, extra)

// GradleModules

class App(
    override val gradleName: String,
    override val packageNamePart: String? = gradleName.toPackageName(),
    override val extra: Map<String, Any> = emptyMap(),
    override val templateName: String = "app",
) : GradleModule(gradleName, packageNamePart, extra, templateName)

data class LibAndroid(
    override val gradleName: String,
    override val packageNamePart: String? = gradleName.toPackageName(),
    override val extra: Map<String, Any> = emptyMap(),
    override val templateName: String = "lib-android",
) : GradleModule(gradleName, packageNamePart, extra, templateName)

data class LibKotlin(
    override val gradleName: String,
    override val packageNamePart: String? = gradleName.toPackageName(),
    override val extra: Map<String, Any> = emptyMap(),
    override val templateName: String = "lib-kotlin",
) : GradleModule(gradleName, packageNamePart, extra, templateName)

// Utils

fun String.toPackageName(): String =
    toLowerCase().replace("-", "")

//
// ProjectModule.kt
//

data class ProjectModule(
    val configModule: GradleModule,
    val configGroups: List<Group>,
    val config: ScriptGradleModuleConfig,
) {
    val templateName: String = configModule.templateName

    val moduleNameParts: List<String> =
        configGroups.flatMap { it.gradleName.toModuleNameParts() } +
            configModule.gradleName.toModuleNameParts()

    val gradlePathParts: List<String> =
        (configGroups.map { it.gradleName } + configModule.gradleName)
            .runningReduce { acc, s ->
                if (!config.forceNamingConvention || s.startsWith("$acc-")) s else "$acc-$s"
            }

    /**
     * Full gradle path, e.g., :feature:navigation:core
     */
    val gradlePath: String = gradlePathParts.joinToString(":", prefix = ":")

    /**
     * Full package name, e.g., com.github.owner.projectname.myfeature
     */
    val packageName: String = buildString {
        val prefix = listOf(config.gradleConfig.packagePrefix)
        val parts = (configGroups.map { it.packageNamePart } + configModule.packageNamePart).filterNotNull()
            .filter { it.isNotBlank() }
        append((prefix + parts).joinToString("."))
    }

    val destinationDirPart: String = gradlePathParts.joinToString("/")

    private fun String.toModuleNameParts(): List<String> = toLowerCase().split("[^a-z0-9]".toRegex())
}

fun List<GradleComponent>.toProjectModuleList(config: ScriptGradleModuleConfig): List<ProjectModule> =
    flatMap { it.toProjectModuleList(config) }

fun GradleComponent.toProjectModuleList(config: ScriptGradleModuleConfig): List<ProjectModule> =
    when (this) {
        is Group -> modules.flatMap {
            it.toProjectModuleList(config)
                .map { (module, packages) ->
                    ProjectModule(module, listOf(this) + packages, config)
                }
        }
        is GradleModule -> listOf(ProjectModule(this, emptyList(), config))
    }

Build multiple modules

Click "run" (on the right) to see the preview!


fun main() {
    val modules = config.modules.toProjectModuleList(config)
    println("This script will create the following ${modules.size} module${if (modules.size == 1) "" else "s"}:")
    modules.forEach {
        println(
            """|
               |Create module [${it.templateName}] ${it.moduleNameParts.joinToString(" ") { it.capitalize() }}
               | - destinationDir: ${it.destinationDirPart}
               | - packageName:    ${it.packageName}
               | - gradlePath:     ${it.gradlePath}""".trimMargin()
        )
    }
    println("\nDo you want to continue?")

}
//sampleStart
val config = ScriptGradleModuleConfig(
    gradleConfig = GradleConfig(
        packagePrefix = "com.github.owner.projectname",
        templatesDirPath = "templates",
        settingsGradleFilename = "settings.gradle.kts",
        dependenciesFilename = "buildSrc/src/main/kotlin/Dependencies.kt",
        dependenciesPrefix = "module",
    ),
    modules = listOf(
        Group(
            gradleName = "feature-name",
            modules = listOf(
                App(
                    gradleName = "app",
                ),
                LibAndroid(
                    gradleName = "ui",
                ),
                LibKotlin(
                    gradleName = "core",
                )
            )
        ),
        LibAndroid(
            gradleName = "my-lib",
        )
    ),
    logLevel = 1,
    hasPrompt = true,
    writeOnDisk = true,
    forceNamingConvention = false,
)
//sampleEnd

//
// ScriptGradleModuleConfig.kt
//

data class ScriptGradleModuleConfig(
    val gradleConfig: GradleConfig = GradleConfig("", "", "", "", ""),
    val modules: List<GradleComponent> = emptyList(),
    val logLevel: Int = -1,
    val hasPrompt: Boolean = false,
    val writeOnDisk: Boolean = false,
    val forceNamingConvention: Boolean = false,
)

data class GradleConfig(
    val packagePrefix: String,
    val templatesDirPath: String,
    val settingsGradleFilename: String,
    val dependenciesFilename: String,
    val dependenciesPrefix: String,
)

//
// GradleComponent.kt
//

sealed class GradleComponent(
    open val gradleName: String,
    open val packageNamePart: String?,
    open val extra: Map<String, Any> = emptyMap(),
)

// GradleComponents

data class Group(
    override val gradleName: String,
    val modules: List<GradleComponent>,
    override val packageNamePart: String? = gradleName.toPackageName(),
    override val extra: Map<String, Any> = emptyMap(),
) : GradleComponent(gradleName, packageNamePart, extra)

sealed class GradleModule(
    gradleName: String,
    packageNamePart: String?,
    extra: Map<String, Any>,
    open val templateName: String,
) : GradleComponent(gradleName, packageNamePart, extra)

// GradleModules

class App(
    override val gradleName: String,
    override val packageNamePart: String? = gradleName.toPackageName(),
    override val extra: Map<String, Any> = emptyMap(),
    override val templateName: String = "app",
) : GradleModule(gradleName, packageNamePart, extra, templateName)

data class LibAndroid(
    override val gradleName: String,
    override val packageNamePart: String? = gradleName.toPackageName(),
    override val extra: Map<String, Any> = emptyMap(),
    override val templateName: String = "lib-android",
) : GradleModule(gradleName, packageNamePart, extra, templateName)

data class LibKotlin(
    override val gradleName: String,
    override val packageNamePart: String? = gradleName.toPackageName(),
    override val extra: Map<String, Any> = emptyMap(),
    override val templateName: String = "lib-kotlin",
) : GradleModule(gradleName, packageNamePart, extra, templateName)

// Utils

fun String.toPackageName(): String =
    toLowerCase().replace("-", "")

//
// ProjectModule.kt
//

data class ProjectModule(
    val configModule: GradleModule,
    val configGroups: List<Group>,
    val config: ScriptGradleModuleConfig,
) {
    val templateName: String = configModule.templateName

    val moduleNameParts: List<String> =
        configGroups.flatMap { it.gradleName.toModuleNameParts() } +
            configModule.gradleName.toModuleNameParts()

    val gradlePathParts: List<String> =
        (configGroups.map { it.gradleName } + configModule.gradleName)
            .runningReduce { acc, s ->
                if (!config.forceNamingConvention || s.startsWith("$acc-")) s else "$acc-$s"
            }

    /**
     * Full gradle path, e.g., :feature:navigation:core
     */
    val gradlePath: String = gradlePathParts.joinToString(":", prefix = ":")

    /**
     * Full package name, e.g., com.github.owner.projectname.myfeature
     */
    val packageName: String = buildString {
        val prefix = listOf(config.gradleConfig.packagePrefix)
        val parts = (configGroups.map { it.packageNamePart } + configModule.packageNamePart).filterNotNull()
            .filter { it.isNotBlank() }
        append((prefix + parts).joinToString("."))
    }

    val destinationDirPart: String = gradlePathParts.joinToString("/")

    private fun String.toModuleNameParts(): List<String> = toLowerCase().split("[^a-z0-9]".toRegex())
}

fun List<GradleComponent>.toProjectModuleList(config: ScriptGradleModuleConfig): List<ProjectModule> =
    flatMap { it.toProjectModuleList(config) }

fun GradleComponent.toProjectModuleList(config: ScriptGradleModuleConfig): List<ProjectModule> =
    when (this) {
        is Group -> modules.flatMap {
            it.toProjectModuleList(config)
                .map { (module, packages) ->
                    ProjectModule(module, listOf(this) + packages, config)
                }
        }
        is GradleModule -> listOf(ProjectModule(this, emptyList(), config))
    }