RoomGradlePlugin.kt

/*
 * Copyright 2023 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package androidx.room.gradle

import androidx.room.gradle.integration.AndroidPluginIntegration
import androidx.room.gradle.integration.CommonIntegration
import androidx.room.gradle.integration.KotlinMultiplatformPluginIntegration
import java.util.Locale
import javax.inject.Inject
import kotlin.contracts.ExperimentalContracts
import kotlin.contracts.contract
import org.gradle.api.GradleException
import org.gradle.api.Plugin
import org.gradle.api.Project
import org.gradle.api.Task
import org.gradle.api.file.ProjectLayout
import org.gradle.api.model.ObjectFactory

class RoomGradlePlugin @Inject constructor(
    projectLayout: ProjectLayout,
    objectFactory: ObjectFactory,
) : Plugin<Project> {

    private val commonIntegration = CommonIntegration(projectLayout, objectFactory)
    private val androidIntegration by lazy { AndroidPluginIntegration(commonIntegration) }
    private val kmpIntegration by lazy { KotlinMultiplatformPluginIntegration(commonIntegration) }

    override fun apply(project: Project) {
        val roomExtension = project.extensions.create("room", RoomExtension::class.java)
        androidIntegration.withAndroid(project, roomExtension)
        kmpIntegration.withKotlin(project, roomExtension)
    }

    companion object {
        internal fun String.capitalize(): String = this.replaceFirstChar {
            if (it.isLowerCase()) it.titlecase(Locale.US) else it.toString()
        }

        internal fun Task.isKspTask(): Boolean = try {
            val kspTaskClass = Class.forName("com.google.devtools.ksp.gradle.KspTask")
            kspTaskClass.isAssignableFrom(this::class.java)
        } catch (ex: ClassNotFoundException) {
            false
        }

        @OptIn(ExperimentalContracts::class)
        internal fun Project.check(
            value: Boolean,
            isFatal: Boolean = false,
            lazyMessage: () -> String
        ) {
            contract {
                returns() implies value
            }
            if (isGradleSyncRunning() && !isFatal) return
            if (!value) {
                throw GradleException(lazyMessage())
            }
        }

        internal fun <V> Map<RoomExtension.MatchName, V>.findPair(key: String) =
            RoomExtension.MatchName(key)
                .let { if (containsKey(it)) it to getValue(it) else null }

        private fun Project.isGradleSyncRunning() = gradleSyncProps.any {
            it in this.properties && this.properties[it].toString().toBoolean()
        }

        private val gradleSyncProps by lazy {
            listOf(
                "android.injected.build.model.v2",
                "android.injected.build.model.only",
                "android.injected.build.model.only.advanced",
            )
        }
    }
}