Separate plugins for different Gradle APIs

.editorconfig

@@ -16,4 +16,5 @@ ktlint_function_naming_ignore_when_annotated_with = [unset]
 ktlint_function_signature_body_expression_wrapping = multiline
 ktlint_function_signature_rule_force_multiline_when_parameter_count_greater_or_equal_than = 2
 ktlint_ignore_back_ticked_identifier = false
+ktlint_standard_filename = disabled
 max_line_length = 140

app/build.gradle.kts

@@ -12,13 +12,14 @@ dependencies {
     implementation(project(":model"))
     implementation(libs.clikt)
     implementation(libs.gradle.toolingApi)
+    implementation(libs.kotlin.stdlib)
     implementation(libs.kotlinx.coroutines.core)
     implementation(libs.serialization.json)
     runtimeOnly(libs.slf4j.simple)
 
-    "share"(project(":plugin", configuration = "shadow")) {
-        isTransitive = false
-    }
+    "share"(project(":plugin:base", configuration = "shadow"))
+    "share"(project(":plugin:gradle80", configuration = "shadow"))
+    "share"(project(":plugin:gradle81", configuration = "shadow"))
 
     testImplementation(libs.kotest.assertions)
     testImplementation(libs.kotest.runner)
@@ -37,7 +38,6 @@ application {
     applicationDistribution
         .from(configurations.named("share"))
         .into("share")
-        .rename("plugin.*\\.jar", "plugin.jar")
 }
 
 java {

app/src/dist/share/init.gradle

@@ -1,6 +1,14 @@
+import org.gradle.util.GradleVersion
+
 initscript {
     dependencies {
-        classpath files("plugin.jar")
+        if (GradleVersion.current() >= GradleVersion.version("8.1")) {
+            classpath files("plugin-gradle81.jar")
+        } else if (GradleVersion.current() >= GradleVersion.version("8.0")) {
+            classpath files("plugin-gradle80.jar")
+        } else {
+            classpath files("plugin-base.jar")
+        }
     }
 }
 

build.gradle.kts

@@ -1,9 +1,6 @@
 plugins {
     base
-    alias(libs.plugins.kotlin.jvm) apply false
     alias(libs.plugins.kotlin.serialization) apply false
-    alias(libs.plugins.pluginPublish) apply false
-    alias(libs.plugins.shadow) apply false
 }
 
 group = "org.nixos.gradle2nix"

buildSrc/build.gradle.kts

@@ -0,0 +1,8 @@
+plugins {
+    `kotlin-dsl`
+}
+
+dependencies {
+    implementation(libs.gradle.kotlin)
+    implementation(libs.gradle.shadow)
+}

buildSrc/settings.gradle.kts

@@ -0,0 +1,14 @@
+@file:Suppress("UnstableApiUsage")
+
+dependencyResolutionManagement {
+    repositories {
+        mavenCentral()
+        gradlePluginPortal()
+    }
+
+    versionCatalogs {
+        register("libs") {
+            from(files("../gradle/libs.versions.toml"))
+        }
+    }
+}

buildSrc/src/main/kotlin/gradle-kotlin-conventions.gradle.kts

@@ -0,0 +1,35 @@
+import org.jetbrains.kotlin.gradle.dsl.JvmTarget
+import org.jetbrains.kotlin.gradle.dsl.KotlinVersion
+
+plugins {
+    id("org.jetbrains.kotlin.jvm")
+}
+
+dependencies {
+    compileOnly(kotlin("stdlib"))
+}
+
+java {
+    sourceCompatibility = JavaVersion.VERSION_1_8
+    targetCompatibility = JavaVersion.VERSION_1_8
+}
+
+kotlin.compilerOptions {
+    @Suppress("DEPRECATION") // we can't use api version greater than 1.4 as minimal supported Gradle version uses kotlin-stdlib 1.4
+    apiVersion.set(KotlinVersion.KOTLIN_1_4)
+    @Suppress("DEPRECATION") // we can't use language version greater than 1.5 as minimal supported Gradle embeds Kotlin 1.4
+    languageVersion.set(KotlinVersion.KOTLIN_1_5)
+    jvmTarget.set(JvmTarget.JVM_1_8)
+    optIn.add("kotlin.RequiresOptIn")
+    freeCompilerArgs.addAll(
+        listOf(
+            "-Xskip-prerelease-check",
+            "-Xsuppress-version-warnings",
+            // We have to override the default value for `-Xsam-conversions` to `class`
+            // otherwise the compiler would compile lambdas using invokedynamic,
+            // such lambdas are not serializable so are not compatible with Gradle configuration cache.
+            // It doesn't lead to a significant difference in binaries sizes, and previously (before LV 1.5) the `class` value was set by default.
+            "-Xsam-conversions=class",
+        ),
+    )
+}

buildSrc/src/main/kotlin/plugin-conventions.gradle.kts

@@ -0,0 +1,60 @@
+@file:Suppress("UnstableApiUsage")
+
+import com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar
+
+plugins {
+    id("gradle-kotlin-conventions")
+    id("io.github.goooler.shadow")
+    `java-gradle-plugin`
+}
+
+dependencies {
+}
+
+configure<GradlePluginDevelopmentExtension> {
+    plugins {
+        register("gradle2nix") {
+            id = "org.nixos.gradle2nix"
+            displayName = "gradle2nix"
+            description = "Expose Gradle tooling model for the gradle2nix tool"
+            implementationClass = "org.nixos.gradle2nix.Gradle2NixPlugin"
+        }
+    }
+}
+
+configurations {
+    "api" {
+        dependencies.remove(project.dependencies.gradleApi())
+    }
+}
+
+tasks {
+    "jar" {
+        enabled = false
+    }
+
+    named("shadowJar", ShadowJar::class) {
+        duplicatesStrategy = DuplicatesStrategy.EXCLUDE
+        isPreserveFileTimestamps = false
+        isReproducibleFileOrder = true
+        val mode644 = 0b110100100
+        val mode755 = 0b111101101
+        fileMode = mode644
+        dirMode = mode755
+        filesMatching("**/bin/*") { mode = mode755 }
+        filesMatching("**/bin/*.bat") { mode = mode644 }
+
+        relocate("kotlinx", "${project.group}.shadow.kotlinx")
+        relocate("org.intellij", "${project.group}.shadow.intellij")
+        relocate("org.jetbrains", "${project.group}.shadow.jetbrains")
+
+        dependencies {
+            exclude { it.moduleGroup == "org.jetbrains.kotlin" && it.moduleName == "kotlin-stdlib" }
+            exclude { it.moduleGroup == "org.jetbrains.kotlin" && it.moduleName == "kotlin-stdlib-common" }
+            exclude { it.moduleGroup == "org.jetbrains.kotlin" && it.moduleName == "kotlin-stdlib-jdk7" }
+            exclude { it.moduleGroup == "org.jetbrains.kotlin" && it.moduleName == "kotlin-stdlib-jdk8" }
+            exclude { it.moduleGroup == "org.jetbrains.kotlin" && it.moduleName == "kotlin-reflect" }
+            exclude { it.moduleGroup == "org.jetbrains.kotlin" && it.moduleName == "kotlin-script-runtime" }
+        }
+    }
+}

flake.nix

@@ -42,7 +42,7 @@
         formatter = pkgs.writeShellScriptBin "gradle2nix-fmt" ''
           fail=0
           ${lib.getExe pkgs.nixfmt-rfc-style} $@ || fail=1
-          ${lib.getExe pkgs.ktlint} --relative -l warn -F || fail=1
+          ${lib.getExe pkgs.git} ls-files -z '*.kt' '*.kts' | ${lib.getExe pkgs.ktlint} --relative -l warn -F --patterns-from-stdin= || fail=1
           [ $fail -eq 0 ] || echo "Formatting failed." >&2
           exit $fail
         '';

gradle.properties

@@ -1,3 +1,4 @@
+kotlin.stdlib.default.dependency=false
 org.gradle.jvmargs='-Dfile.encoding=UTF-8'
 org.gradle.caching=true
 org.gradle.configuration-cache=true

gradle/libs.versions.toml

@@ -1,27 +1,34 @@
 [versions]
 gradle = "8.7"
 junit = "5.8.2"
-kotlin = "1.9.24"
+# Intentionally using the version embedded in Gradle to reduce dependency count
+# See https://docs.gradle.org/current/userguide/compatibility.html#kotlin
+kotlin = { strictly = "1.9.22" }
 ktor = "2.3.11"
 kotest = "5.9.0"
+shadow = "8.1.7"
 
 [libraries]
 clikt = "com.github.ajalt.clikt:clikt:4.4.0"
+gradle-api-69 = "dev.gradleplugins:gradle-api:6.9"
+gradle-api-80 = "dev.gradleplugins:gradle-api:8.0"
+gradle-api-81 = "dev.gradleplugins:gradle-api:8.1"
+gradle-kotlin = { module = "org.jetbrains.kotlin:kotlin-gradle-plugin", version.ref = "kotlin" }
+gradle-shadow = { module = "io.github.goooler.shadow:shadow-gradle-plugin", version.ref = "shadow" }
 gradle-toolingApi = { module = "org.gradle:gradle-tooling-api", version.ref = "gradle" }
 kotest-assertions = { module = "io.kotest:kotest-assertions-core", version.ref = "kotest" }
 kotest-runner = { module = "io.kotest:kotest-runner-junit5", version.ref = "kotest" }
+kotlin-stdlib = { module = "org.jetbrains.kotlin:kotlin-stdlib", version.ref = "kotlin" }
 kotlinx-coroutines-core = "org.jetbrains.kotlinx:kotlinx-coroutines-core:1.8.1"
 ktor-server-core = { module = "io.ktor:ktor-server-core", version.ref = "ktor" }
 ktor-server-netty = { module = "io.ktor:ktor-server-netty", version.ref = "ktor" }
 okio = "com.squareup.okio:okio:3.9.0"
 serialization-json = "org.jetbrains.kotlinx:kotlinx-serialization-json:1.6.3"
 slf4j-simple = "org.slf4j:slf4j-simple:1.7.36"
-xmlutil = "io.github.pdvrieze.xmlutil:serialization-jvm:0.90.0-RC1"
 
 [plugins]
-pluginPublish = { id = "com.gradle.plugin-publish", version = "1.2.1" }
 kotlin-jvm = { id = "org.jetbrains.kotlin.jvm", version.ref = "kotlin" }
 kotlin-serialization = { id = "org.jetbrains.kotlin.plugin.serialization", version.ref = "kotlin" }
-shadow = { id = "com.github.johnrengelman.shadow", version = "8.1.1" }
+shadow = { id = "io.github.goooler.shadow", version.ref = "shadow" }
 
 [bundles]

model/build.gradle.kts

@@ -1,16 +1,34 @@
 import org.jetbrains.kotlin.gradle.dsl.JvmTarget
+import org.jetbrains.kotlin.gradle.dsl.KotlinVersion
 
 plugins {
     id("org.jetbrains.kotlin.jvm")
 }
 
+dependencies {
+    compileOnly(libs.kotlin.stdlib)
+}
+
 java {
     sourceCompatibility = JavaVersion.VERSION_1_8
     targetCompatibility = JavaVersion.VERSION_1_8
 }
 
-kotlin {
-    compilerOptions {
+kotlin.compilerOptions {
+    @Suppress("DEPRECATION") // we can't use api version greater than 1.4 as minimal supported Gradle version uses kotlin-stdlib 1.4
+    apiVersion.set(KotlinVersion.KOTLIN_1_4)
+    @Suppress("DEPRECATION") // we can't use language version greater than 1.5 as minimal supported Gradle embeds Kotlin 1.4
+    languageVersion.set(KotlinVersion.KOTLIN_1_5)
     jvmTarget.set(JvmTarget.JVM_1_8)
-    }
+    freeCompilerArgs.addAll(
+        listOf(
+            "-Xskip-prerelease-check",
+            "-Xsuppress-version-warnings",
+            // We have to override the default value for `-Xsam-conversions` to `class`
+            // otherwise the compiler would compile lambdas using invokedynamic,
+            // such lambdas are not serializable so are not compatible with Gradle configuration cache.
+            // It doesn't lead to a significant difference in binaries sizes, and previously (before LV 1.5) the `class` value was set by default.
+            "-Xsam-conversions=class",
+        ),
+    )
 }

plugin/base/build.gradle.kts

@@ -0,0 +1,12 @@
+plugins {
+    `plugin-conventions`
+}
+
+dependencies {
+    implementation(project(":plugin:common"))
+    compileOnly(libs.gradle.api.get69())
+}
+
+tasks.shadowJar {
+    archiveFileName = "plugin-base.jar"
+}

plugin/base/src/main/kotlin/DependencyExtractor.base.kt

@@ -0,0 +1,18 @@
+package org.nixos.gradle2nix
+
+import org.gradle.api.invocation.Gradle
+import org.gradle.internal.operations.BuildOperationListenerManager
+
+object DependencyExtractorApplierBase : DependencyExtractorApplier {
+    override fun apply(
+        gradle: Gradle,
+        extractor: DependencyExtractor,
+    ) {
+        val buildOperationListenerManager = gradle.service<BuildOperationListenerManager>()
+
+        buildOperationListenerManager.addListener(extractor)
+        gradle.buildFinished {
+            buildOperationListenerManager.removeListener(extractor)
+        }
+    }
+}

plugin/base/src/main/kotlin/Gradle2NixPlugin.gradle69.kt

@@ -0,0 +1,7 @@
+package org.nixos.gradle2nix
+
+abstract class Gradle2NixPlugin : AbstractGradle2NixPlugin(
+    GradleCacheAccessFactoryBase,
+    DependencyExtractorApplierBase,
+    ResolveAllArtifactsApplierBase,
+)

plugin/base/src/main/kotlin/GradleCacheAccess.gradle69.kt

@@ -0,0 +1,18 @@
+package org.nixos.gradle2nix
+
+import org.gradle.api.internal.artifacts.ivyservice.ArtifactCachesProvider
+import org.gradle.api.invocation.Gradle
+
+object GradleCacheAccessFactoryBase : GradleCacheAccessFactory {
+    override fun create(gradle: Gradle): GradleCacheAccess {
+        return GradleCacheAccessBase(gradle)
+    }
+}
+
+class GradleCacheAccessBase(gradle: Gradle) : GradleCacheAccess {
+    private val artifactCachesProvider = gradle.service<ArtifactCachesProvider>()
+
+    override fun useCache(block: () -> Unit) {
+        artifactCachesProvider.writableCacheLockingManager.useCache(block)
+    }
+}

plugin/base/src/main/kotlin/ResolveAllArtifacts.gradle69.kt

@@ -0,0 +1,20 @@
+package org.nixos.gradle2nix
+
+import org.gradle.api.Project
+import org.gradle.api.tasks.TaskAction
+import org.gradle.api.tasks.TaskProvider
+import org.nixos.gradle2nix.model.RESOLVE_PROJECT_TASK
+
+object ResolveAllArtifactsApplierBase : AbstractResolveAllArtifactsApplier() {
+    override fun Project.registerProjectTask(): TaskProvider<*> =
+        tasks.register(RESOLVE_PROJECT_TASK, ResolveProjectDependenciesTaskBase::class.java)
+}
+
+abstract class ResolveProjectDependenciesTaskBase : ResolveProjectDependenciesTask() {
+    @TaskAction
+    fun action() {
+        for (configuration in getReportableConfigurations()) {
+            configuration.artifactFiles().count()
+        }
+    }
+}

plugin/build.gradle.kts

@@ -1,61 +0,0 @@
-import org.jetbrains.kotlin.gradle.dsl.JvmTarget
-import org.jetbrains.kotlin.gradle.dsl.KotlinVersion
-
-plugins {
-    id("org.jetbrains.kotlin.jvm")
-    id("com.gradle.plugin-publish")
-    id("com.github.johnrengelman.shadow")
-}
-
-dependencies {
-    shadow(kotlin("stdlib-jdk8"))
-    shadow(kotlin("reflect"))
-    implementation(project(":model"))
-    implementation(libs.serialization.json)
-}
-
-java {
-    sourceCompatibility = JavaVersion.VERSION_1_8
-    targetCompatibility = JavaVersion.VERSION_1_8
-}
-
-kotlin {
-    compilerOptions {
-        apiVersion.set(KotlinVersion.KOTLIN_1_6)
-        languageVersion.set(KotlinVersion.KOTLIN_1_6)
-        jvmTarget.set(JvmTarget.JVM_1_8)
-        optIn.add("kotlin.RequiresOptIn")
-    }
-}
-
-gradlePlugin {
-    plugins {
-        register("gradle2nix") {
-            id = "org.nixos.gradle2nix"
-            displayName = "gradle2nix"
-            description = "Expose Gradle tooling model for the gradle2nix tool"
-            implementationClass = "org.nixos.gradle2nix.Gradle2NixPlugin"
-        }
-    }
-}
-
-tasks {
-    jar {
-        manifest {
-            attributes["Implementation-Version"] = archiveVersion.get()
-            attributes["Implementation-Title"] = "Gradle2Nix Plugin"
-            attributes["Implementation-Vendor"] = "Tad Fisher"
-        }
-    }
-
-    shadowJar {
-        archiveClassifier.set("")
-        relocate("kotlin", "${project.group}.shadow.kotlin")
-        relocate("org.intellij", "${project.group}.shadow.intellij")
-        relocate("org.jetbrains", "${project.group}.shadow.jetbrains")
-    }
-
-    validatePlugins {
-        enableStricterValidation.set(true)
-    }
-}

plugin/common/build.gradle.kts

@@ -0,0 +1,9 @@
+plugins {
+    `gradle-kotlin-conventions`
+}
+
+dependencies {
+    compileOnly(libs.gradle.api.get69())
+    api(project(":model"))
+    implementation(libs.serialization.json)
+}

plugin/common/src/main/kotlin/DependencyExtractor.kt

@@ -7,10 +7,8 @@ import kotlinx.serialization.json.decodeFromStream
 import kotlinx.serialization.json.jsonArray
 import kotlinx.serialization.json.jsonObject
 import kotlinx.serialization.json.jsonPrimitive
-import org.gradle.api.internal.artifacts.ivyservice.ArtifactCachesProvider
 import org.gradle.api.internal.artifacts.ivyservice.modulecache.FileStoreAndIndexProvider
-import org.gradle.api.services.BuildService
-import org.gradle.api.services.BuildServiceParameters
+import org.gradle.api.invocation.Gradle
 import org.gradle.internal.hash.ChecksumService
 import org.gradle.internal.operations.BuildOperationDescriptor
 import org.gradle.internal.operations.BuildOperationListener
@@ -29,30 +27,11 @@ import org.nixos.gradle2nix.model.impl.DefaultResolvedDependency
 import java.io.File
 import java.util.concurrent.ConcurrentHashMap
 
-internal abstract class DependencyExtractorService :
-    BuildService<BuildServiceParameters.None>, BuildOperationListener, AutoCloseable {
-    var extractor: DependencyExtractor? = null
-
-    override fun started(
-        buildOperation: BuildOperationDescriptor,
-        startEvent: OperationStartEvent,
-    ) {}
-
-    override fun progress(
-        operationIdentifier: OperationIdentifier,
-        progressEvent: OperationProgressEvent,
-    ) {}
-
-    override fun finished(
-        buildOperation: BuildOperationDescriptor,
-        finishEvent: OperationFinishEvent,
-    ) {
-        extractor?.finished(buildOperation, finishEvent)
-    }
-
-    override fun close() {
-        extractor = null
-    }
+interface DependencyExtractorApplier {
+    fun apply(
+        gradle: Gradle,
+        extractor: DependencyExtractor,
+    )
 }
 
 class DependencyExtractor : BuildOperationListener {
@@ -80,14 +59,14 @@ class DependencyExtractor : BuildOperationListener {
     }
 
     fun buildDependencySet(
-        artifactCachesProvider: ArtifactCachesProvider,
+        cacheAccess: GradleCacheAccess,
         checksumService: ChecksumService,
         fileStoreAndIndexProvider: FileStoreAndIndexProvider,
     ): DependencySet {
         val files = mutableMapOf<DependencyCoordinates, MutableMap<File, String>>()
         val mappings = mutableMapOf<DependencyCoordinates, Map<String, String>>()
 
-        artifactCachesProvider.writableCacheAccessCoordinator.useCache {
+        cacheAccess.useCache {
             for ((url, _) in urls) {
                 fileStoreAndIndexProvider.externalResourceIndex.lookup(url)?.let { cached ->
                     cached.cachedFile?.let { file ->
@@ -131,6 +110,8 @@ class DependencyExtractor : BuildOperationListener {
     }
 }
 
+private fun <T> buildList(block: MutableList<T>.() -> Unit): List<T> = mutableListOf<T>().apply(block).toList()
+
 private fun cachedComponentId(file: File): DependencyCoordinates? {
     val parts = file.invariantSeparatorsPath.split('/')
     if (parts.size < 6) return null
@@ -148,7 +129,7 @@ private fun parseFileMappings(file: File): Map<String, String>? =
             ?.mapNotNull {
                 val name = it["name"]?.jsonPrimitive?.content ?: return@mapNotNull null
                 val url = it["url"]?.jsonPrimitive?.content ?: return@mapNotNull null
-                name to url
+                if (name != url) name to url else null
             }
             ?.toMap()
             ?.takeUnless { it.isEmpty() }

plugin/common/src/main/kotlin/DependencySetModelBuilder.kt

@@ -0,0 +1,27 @@
+package org.nixos.gradle2nix
+
+import org.gradle.api.Project
+import org.gradle.api.internal.artifacts.ivyservice.modulecache.FileStoreAndIndexProvider
+import org.gradle.internal.hash.ChecksumService
+import org.gradle.tooling.provider.model.ToolingModelBuilder
+import org.nixos.gradle2nix.model.DependencySet
+
+class DependencySetModelBuilder(
+    private val dependencyExtractor: DependencyExtractor,
+    private val cacheAccess: GradleCacheAccess,
+    private val checksumService: ChecksumService,
+    private val fileStoreAndIndexProvider: FileStoreAndIndexProvider,
+) : ToolingModelBuilder {
+    override fun canBuild(modelName: String): Boolean = modelName == DependencySet::class.qualifiedName
+
+    override fun buildAll(
+        modelName: String,
+        project: Project,
+    ): DependencySet {
+        return dependencyExtractor.buildDependencySet(
+            cacheAccess,
+            checksumService,
+            fileStoreAndIndexProvider,
+        )
+    }
+}

plugin/common/src/main/kotlin/Gradle2NixPlugin.kt

@@ -0,0 +1,32 @@
+package org.nixos.gradle2nix
+
+import org.gradle.api.Plugin
+import org.gradle.api.internal.artifacts.ivyservice.modulecache.FileStoreAndIndexProvider
+import org.gradle.api.invocation.Gradle
+import org.gradle.internal.hash.ChecksumService
+import org.gradle.tooling.provider.model.ToolingModelBuilderRegistry
+
+abstract class AbstractGradle2NixPlugin(
+    private val cacheAccessFactory: GradleCacheAccessFactory,
+    private val dependencyExtractorApplier: DependencyExtractorApplier,
+    private val resolveAllArtifactsApplier: ResolveAllArtifactsApplier,
+) : Plugin<Gradle> {
+    override fun apply(gradle: Gradle) {
+        val extractor = DependencyExtractor()
+
+        gradle.service<ToolingModelBuilderRegistry>().register(
+            DependencySetModelBuilder(
+                extractor,
+                cacheAccessFactory.create(gradle),
+                gradle.service<ChecksumService>(),
+                gradle.service<FileStoreAndIndexProvider>(),
+            ),
+        )
+
+        dependencyExtractorApplier.apply(gradle, extractor)
+
+        gradle.projectsEvaluated {
+            resolveAllArtifactsApplier.apply(gradle)
+        }
+    }
+}

plugin/common/src/main/kotlin/GradleCacheAccess.kt

@@ -0,0 +1,11 @@
+package org.nixos.gradle2nix
+
+import org.gradle.api.invocation.Gradle
+
+fun interface GradleCacheAccessFactory {
+    fun create(gradle: Gradle): GradleCacheAccess
+}
+
+interface GradleCacheAccess {
+    fun useCache(block: () -> Unit)
+}

plugin/common/src/main/kotlin/GradleExtensions.kt

@@ -0,0 +1,6 @@
+package org.nixos.gradle2nix
+
+import org.gradle.api.internal.GradleInternal
+import org.gradle.api.invocation.Gradle
+
+inline fun <reified T> Gradle.service(): T = (this as GradleInternal).services.get(T::class.java)

plugin/common/src/main/kotlin/ResolveAllArtifacts.kt

@@ -0,0 +1,50 @@
+package org.nixos.gradle2nix
+
+import org.gradle.api.DefaultTask
+import org.gradle.api.Project
+import org.gradle.api.artifacts.Configuration
+import org.gradle.api.artifacts.component.ModuleComponentIdentifier
+import org.gradle.api.file.FileCollection
+import org.gradle.api.invocation.Gradle
+import org.gradle.api.tasks.Internal
+import org.gradle.api.tasks.TaskProvider
+import org.gradle.internal.deprecation.DeprecatableConfiguration
+import org.nixos.gradle2nix.model.RESOLVE_ALL_TASK
+
+fun interface ResolveAllArtifactsApplier {
+    fun apply(gradle: Gradle)
+}
+
+abstract class AbstractResolveAllArtifactsApplier : ResolveAllArtifactsApplier {
+    abstract fun Project.registerProjectTask(): TaskProvider<*>
+
+    final override fun apply(gradle: Gradle) {
+        val resolveAll = gradle.rootProject.tasks.register(RESOLVE_ALL_TASK)
+
+        // Depend on "dependencies" task in all projects
+        gradle.allprojects { project ->
+            val resolveProject = project.registerProjectTask()
+            resolveAll.configure { it.dependsOn(resolveProject) }
+        }
+
+        // Depend on all 'resolveBuildDependencies' task in each included build
+        gradle.includedBuilds.forEach { includedBuild ->
+            resolveAll.configure {
+                it.dependsOn(includedBuild.task(":$RESOLVE_ALL_TASK"))
+            }
+        }
+    }
+}
+
+abstract class ResolveProjectDependenciesTask : DefaultTask() {
+    @Internal
+    protected fun getReportableConfigurations(): List<Configuration> {
+        return project.configurations.filter { (it as? DeprecatableConfiguration)?.canSafelyBeResolved() ?: true }
+    }
+
+    protected fun Configuration.artifactFiles(): FileCollection {
+        return incoming.artifactView { viewConfiguration ->
+            viewConfiguration.componentFilter { it is ModuleComponentIdentifier }
+        }.files
+    }
+}

plugin/gradle8/build.gradle.kts

@@ -0,0 +1,8 @@
+plugins {
+    `gradle-kotlin-conventions`
+}
+
+dependencies {
+    compileOnly(libs.gradle.api.get80())
+    api(project(":plugin:common"))
+}

plugin/gradle8/src/main/kotlin/DependencyExtractor.gradle8.kt

@@ -0,0 +1,57 @@
+package org.nixos.gradle2nix
+
+import org.gradle.api.invocation.Gradle
+import org.gradle.api.services.BuildService
+import org.gradle.api.services.BuildServiceParameters
+import org.gradle.internal.build.event.BuildEventListenerRegistryInternal
+import org.gradle.internal.operations.BuildOperationDescriptor
+import org.gradle.internal.operations.BuildOperationListener
+import org.gradle.internal.operations.OperationFinishEvent
+import org.gradle.internal.operations.OperationIdentifier
+import org.gradle.internal.operations.OperationProgressEvent
+import org.gradle.internal.operations.OperationStartEvent
+
+object DependencyExtractorApplierG8 : DependencyExtractorApplier {
+    @Suppress("UnstableApiUsage")
+    override fun apply(
+        gradle: Gradle,
+        extractor: DependencyExtractor,
+    ) {
+        val serviceProvider =
+            gradle.sharedServices.registerIfAbsent(
+                "nixDependencyExtractor",
+                DependencyExtractorService::class.java,
+            ) {}.map { service ->
+                service.apply { this.extractor = extractor }
+            }
+
+        gradle.service<BuildEventListenerRegistryInternal>().onOperationCompletion(serviceProvider)
+    }
+}
+
+@Suppress("UnstableApiUsage")
+internal abstract class DependencyExtractorService :
+    BuildService<BuildServiceParameters.None>, BuildOperationListener, AutoCloseable {
+    var extractor: DependencyExtractor? = null
+
+    override fun started(
+        buildOperation: BuildOperationDescriptor,
+        startEvent: OperationStartEvent,
+    ) {}
+
+    override fun progress(
+        operationIdentifier: OperationIdentifier,
+        progressEvent: OperationProgressEvent,
+    ) {}
+
+    override fun finished(
+        buildOperation: BuildOperationDescriptor,
+        finishEvent: OperationFinishEvent,
+    ) {
+        extractor?.finished(buildOperation, finishEvent)
+    }
+
+    override fun close() {
+        extractor = null
+    }
+}

plugin/gradle8/src/main/kotlin/ResolveAllArtifacts.gradle8.kt

@@ -0,0 +1,38 @@
+package org.nixos.gradle2nix
+
+import org.gradle.api.Project
+import org.gradle.api.file.FileCollection
+import org.gradle.api.model.ObjectFactory
+import org.gradle.api.tasks.TaskAction
+import org.gradle.api.tasks.TaskProvider
+import org.gradle.internal.serialization.Cached
+import org.gradle.work.DisableCachingByDefault
+import org.nixos.gradle2nix.model.RESOLVE_PROJECT_TASK
+import javax.inject.Inject
+
+object ResolveAllArtifactsApplierG8 : AbstractResolveAllArtifactsApplier() {
+    override fun Project.registerProjectTask(): TaskProvider<*> =
+        tasks.register(RESOLVE_PROJECT_TASK, ResolveProjectDependenciesTaskG8::class.java)
+}
+
+@DisableCachingByDefault(because = "Not worth caching")
+abstract class ResolveProjectDependenciesTaskG8
+    @Inject
+    constructor(
+        private val objects: ObjectFactory,
+    ) : ResolveProjectDependenciesTask() {
+        private val artifactFiles = Cached.of { artifactFiles() }
+
+        private fun artifactFiles(): FileCollection {
+            return objects.fileCollection().from(
+                getReportableConfigurations().map { configuration ->
+                    configuration.artifactFiles()
+                },
+            )
+        }
+
+        @TaskAction
+        fun action() {
+            artifactFiles.get().count()
+        }
+    }

plugin/gradle80/build.gradle.kts

@@ -0,0 +1,12 @@
+plugins {
+    `plugin-conventions`
+}
+
+dependencies {
+    implementation(project(":plugin:gradle8"))
+    compileOnly(libs.gradle.api.get80())
+}
+
+tasks.shadowJar {
+    archiveFileName = "plugin-gradle80.jar"
+}

plugin/gradle80/src/main/kotlin/Gradle2NixPlugin.gradle80.kt

@@ -0,0 +1,7 @@
+package org.nixos.gradle2nix
+
+abstract class Gradle2NixPlugin : AbstractGradle2NixPlugin(
+    GradleCacheAccessFactoryG80,
+    DependencyExtractorApplierG8,
+    ResolveAllArtifactsApplierG8,
+)

plugin/gradle80/src/main/kotlin/GradleCacheAccess.gradle80.kt

@@ -0,0 +1,18 @@
+package org.nixos.gradle2nix
+
+import org.gradle.api.internal.artifacts.ivyservice.ArtifactCachesProvider
+import org.gradle.api.invocation.Gradle
+
+object GradleCacheAccessFactoryG80 : GradleCacheAccessFactory {
+    override fun create(gradle: Gradle): GradleCacheAccess {
+        return GradleCacheAccessG80(gradle)
+    }
+}
+
+class GradleCacheAccessG80(gradle: Gradle) : GradleCacheAccess {
+    private val artifactCachesProvider = gradle.service<ArtifactCachesProvider>()
+
+    override fun useCache(block: () -> Unit) {
+        artifactCachesProvider.writableCacheLockingManager.useCache(block)
+    }
+}

plugin/gradle81/build.gradle.kts

@@ -0,0 +1,12 @@
+plugins {
+    `plugin-conventions`
+}
+
+dependencies {
+    implementation(project(":plugin:gradle8"))
+    compileOnly(libs.gradle.api.get81())
+}
+
+tasks.shadowJar {
+    archiveFileName = "plugin-gradle81.jar"
+}

plugin/gradle81/src/main/kotlin/Gradle2NixPlugin.gradle81.kt

@@ -0,0 +1,7 @@
+package org.nixos.gradle2nix
+
+abstract class Gradle2NixPlugin : AbstractGradle2NixPlugin(
+    GradleCacheAccessFactoryG81,
+    DependencyExtractorApplierG8,
+    ResolveAllArtifactsApplierG8,
+)

plugin/gradle81/src/main/kotlin/GradleCacheAccess.gradle81.kt

@@ -0,0 +1,18 @@
+package org.nixos.gradle2nix
+
+import org.gradle.api.internal.artifacts.ivyservice.ArtifactCachesProvider
+import org.gradle.api.invocation.Gradle
+
+object GradleCacheAccessFactoryG81 : GradleCacheAccessFactory {
+    override fun create(gradle: Gradle): GradleCacheAccess {
+        return GradleCacheAccessG81(gradle)
+    }
+}
+
+class GradleCacheAccessG81(gradle: Gradle) : GradleCacheAccess {
+    private val artifactCachesProvider = gradle.service<ArtifactCachesProvider>()
+
+    override fun useCache(block: () -> Unit) {
+        artifactCachesProvider.writableCacheAccessCoordinator.useCache(block)
+    }
+}

plugin/src/main/kotlin/org/nixos/gradle2nix/Gradle2NixPlugin.kt

@@ -1,93 +0,0 @@
-@file:Suppress("UnstableApiUsage")
-
-package org.nixos.gradle2nix
-
-import org.gradle.api.Plugin
-import org.gradle.api.Project
-import org.gradle.api.internal.artifacts.ivyservice.ArtifactCachesProvider
-import org.gradle.api.internal.artifacts.ivyservice.modulecache.FileStoreAndIndexProvider
-import org.gradle.api.invocation.Gradle
-import org.gradle.internal.hash.ChecksumService
-import org.gradle.tooling.provider.model.ToolingModelBuilder
-import org.gradle.tooling.provider.model.ToolingModelBuilderRegistry
-import org.gradle.util.GradleVersion
-import org.nixos.gradle2nix.model.DependencySet
-import org.nixos.gradle2nix.model.RESOLVE_ALL_TASK
-import javax.inject.Inject
-
-@Suppress("UNUSED")
-abstract class Gradle2NixPlugin
-    @Inject
-    constructor(
-        private val toolingModelBuilderRegistry: ToolingModelBuilderRegistry,
-    ) : Plugin<Gradle> {
-        override fun apply(gradle: Gradle) {
-            val dependencyExtractor = DependencyExtractor()
-
-            toolingModelBuilderRegistry.register(
-                DependencySetModelBuilder(
-                    dependencyExtractor,
-                    gradle.artifactCachesProvider,
-                    gradle.checksumService,
-                    gradle.fileStoreAndIndexProvider,
-                ),
-            )
-
-            if (GradleVersion.current() < GradleVersion.version("8.0")) {
-                val extractor = DependencyExtractor()
-                gradle.buildOperationListenerManager.addListener(extractor)
-
-                @Suppress("DEPRECATION")
-                gradle.buildFinished {
-                    gradle.buildOperationListenerManager.removeListener(extractor)
-                }
-            } else {
-                val serviceProvider =
-                    gradle.sharedServices.registerIfAbsent(
-                        "nixDependencyExtractor",
-                        DependencyExtractorService::class.java,
-                    ) {}.map { service ->
-                        service.apply { extractor = dependencyExtractor }
-                    }
-
-                gradle.buildEventListenerRegistryInternal.onOperationCompletion(serviceProvider)
-            }
-
-            gradle.projectsEvaluated {
-                val resolveAll = gradle.rootProject.tasks.register(RESOLVE_ALL_TASK)
-
-                // Depend on "dependencies" task in all projects
-                gradle.allprojects { project ->
-                    val resolveProject = project.createResolveTask()
-                    resolveAll.configure { it.dependsOn(resolveProject) }
-                }
-
-                // Depend on all 'resolveBuildDependencies' task in each included build
-                gradle.includedBuilds.forEach { includedBuild ->
-                    resolveAll.configure {
-                        it.dependsOn(includedBuild.task(":$RESOLVE_ALL_TASK"))
-                    }
-                }
-            }
-        }
-    }
-
-internal class DependencySetModelBuilder(
-    private val dependencyExtractor: DependencyExtractor,
-    private val artifactCachesProvider: ArtifactCachesProvider,
-    private val checksumService: ChecksumService,
-    private val fileStoreAndIndexProvider: FileStoreAndIndexProvider,
-) : ToolingModelBuilder {
-    override fun canBuild(modelName: String): Boolean = modelName == DependencySet::class.qualifiedName
-
-    override fun buildAll(
-        modelName: String,
-        project: Project,
-    ): DependencySet {
-        return dependencyExtractor.buildDependencySet(
-            artifactCachesProvider,
-            checksumService,
-            fileStoreAndIndexProvider,
-        )
-    }
-}

plugin/src/main/kotlin/org/nixos/gradle2nix/GradleExtensions.kt

@@ -1,42 +0,0 @@
-package org.nixos.gradle2nix
-
-import org.gradle.api.artifacts.Configuration
-import org.gradle.api.internal.GradleInternal
-import org.gradle.api.internal.artifacts.ivyservice.ArtifactCachesProvider
-import org.gradle.api.internal.artifacts.ivyservice.modulecache.FileStoreAndIndexProvider
-import org.gradle.api.invocation.Gradle
-import org.gradle.internal.build.event.BuildEventListenerRegistryInternal
-import org.gradle.internal.hash.ChecksumService
-import org.gradle.internal.operations.BuildOperationListenerManager
-import org.gradle.util.GradleVersion
-import java.lang.reflect.Method
-
-internal inline val Gradle.artifactCachesProvider: ArtifactCachesProvider
-    get() = service()
-
-internal inline val Gradle.buildEventListenerRegistryInternal: BuildEventListenerRegistryInternal
-    get() = service()
-
-internal inline val Gradle.buildOperationListenerManager: BuildOperationListenerManager
-    get() = service()
-
-internal inline val Gradle.checksumService: ChecksumService
-    get() = service()
-
-internal inline val Gradle.fileStoreAndIndexProvider: FileStoreAndIndexProvider
-    get() = service()
-
-internal inline fun <reified T> Gradle.service(): T = (this as GradleInternal).services.get(T::class.java)
-
-private val canSafelyBeResolvedMethod: Method? =
-    try {
-        val dc = Class.forName("org.gradle.internal.deprecation.DeprecatableConfiguration")
-        dc.getMethod("canSafelyBeResolved")
-    } catch (e: ReflectiveOperationException) {
-        null
-    }
-
-internal fun Configuration.canSafelyBeResolved(): Boolean = canSafelyBeResolvedMethod?.invoke(this) as? Boolean ?: isCanBeResolved
-
-internal val gradleVersionIsAtLeast8: Boolean =
-    GradleVersion.current() >= GradleVersion.version("8.0")

plugin/src/main/kotlin/org/nixos/gradle2nix/ResolveAllArtifacts.kt

@@ -1,66 +0,0 @@
-package org.nixos.gradle2nix
-
-import org.gradle.api.DefaultTask
-import org.gradle.api.Project
-import org.gradle.api.Task
-import org.gradle.api.artifacts.Configuration
-import org.gradle.api.artifacts.component.ModuleComponentIdentifier
-import org.gradle.api.file.FileCollection
-import org.gradle.api.model.ObjectFactory
-import org.gradle.api.tasks.Internal
-import org.gradle.api.tasks.TaskAction
-import org.gradle.api.tasks.TaskProvider
-import org.gradle.internal.serialization.Cached
-import org.gradle.work.DisableCachingByDefault
-import org.nixos.gradle2nix.model.RESOLVE_PROJECT_TASK
-import javax.inject.Inject
-
-internal fun Project.createResolveTask(): TaskProvider<out Task> {
-    return if (gradleVersionIsAtLeast8) {
-        tasks.register(RESOLVE_PROJECT_TASK, ResolveProjectDependenciesTask::class.java)
-    } else {
-        tasks.register(RESOLVE_PROJECT_TASK, LegacyResolveProjectDependenciesTask::class.java)
-    }
-}
-
-@DisableCachingByDefault(because = "Not worth caching")
-sealed class AbstractResolveProjectDependenciesTask : DefaultTask() {
-    @Internal
-    protected fun getReportableConfigurations(): List<Configuration> {
-        return project.configurations.filter { it.canSafelyBeResolved() }
-    }
-}
-
-@DisableCachingByDefault(because = "Not worth caching")
-abstract class LegacyResolveProjectDependenciesTask : AbstractResolveProjectDependenciesTask() {
-    @TaskAction
-    fun action() {
-        for (configuration in getReportableConfigurations()) {
-            configuration.incoming.resolutionResult.root
-        }
-    }
-}
-
-@DisableCachingByDefault(because = "Not worth caching")
-abstract class ResolveProjectDependenciesTask
-    @Inject
-    constructor(
-        private val objects: ObjectFactory,
-    ) : AbstractResolveProjectDependenciesTask() {
-        private val artifactFiles = Cached.of { artifactFiles() }
-
-        private fun artifactFiles(): FileCollection {
-            return objects.fileCollection().from(
-                getReportableConfigurations().map { configuration ->
-                    configuration.incoming.artifactView { viewConfiguration ->
-                        viewConfiguration.componentFilter { it is ModuleComponentIdentifier }
-                    }.files
-                },
-            )
-        }
-
-        @TaskAction
-        fun action() {
-            artifactFiles.get().count()
-        }
-    }

settings.gradle.kts

@@ -11,5 +11,9 @@ dependencyResolutionManagement {
 include(
     ":app",
     ":model",
-    ":plugin",
+    ":plugin:base",
+    ":plugin:common",
+    ":plugin:gradle8",
+    ":plugin:gradle80",
+    ":plugin:gradle81",
 )