remove all KSP logic

We aren't currently planning on pursuing KSP (see
[#1075](#1075)).

.github/workflows/ci.yml

@@ -75,7 +75,7 @@ jobs:
       # Expressions in Github actions are limited. If there would be an if expression, then we
       # wouldn't need to duplicate the next step and depending on the OS enable / disable them.
       - name: Test on Windows
-        run: ./gradlew.bat assemble test --no-build-cache --no-daemon --stacktrace -Doverride_config-fullTestRun=false -Doverride_config-includeKspTests=false
+        run: ./gradlew.bat assemble test --no-build-cache --no-daemon --stacktrace -Doverride_config-fullTestRun=false
 
       - name: Upload Test Results
         uses: actions/upload-artifact@0b2256b8c012f0828dc542b3febcab082c67f72b # v4

compiler-api/api/compiler-api.api

@@ -1,6 +1,5 @@
 public final class com/squareup/anvil/compiler/api/AnalysisBackend : java/lang/Enum {
 	public static final field EMBEDDED Lcom/squareup/anvil/compiler/api/AnalysisBackend;
-	public static final field KSP Lcom/squareup/anvil/compiler/api/AnalysisBackend;
 	public static fun getEntries ()Lkotlin/enums/EnumEntries;
 	public static fun valueOf (Ljava/lang/String;)Lcom/squareup/anvil/compiler/api/AnalysisBackend;
 	public static fun values ()[Lcom/squareup/anvil/compiler/api/AnalysisBackend;
@@ -60,7 +59,6 @@ public final class com/squareup/anvil/compiler/api/CodeGeneratorKt {
 
 public final class com/squareup/anvil/compiler/api/ComponentMergingBackend : java/lang/Enum {
 	public static final field IR Lcom/squareup/anvil/compiler/api/ComponentMergingBackend;
-	public static final field KSP Lcom/squareup/anvil/compiler/api/ComponentMergingBackend;
 	public static fun getEntries ()Lkotlin/enums/EnumEntries;
 	public static fun valueOf (Ljava/lang/String;)Lcom/squareup/anvil/compiler/api/ComponentMergingBackend;
 	public static fun values ()[Lcom/squareup/anvil/compiler/api/ComponentMergingBackend;

compiler-api/src/main/java/com/squareup/anvil/compiler/api/AnalysisBackend.kt

@@ -7,7 +7,4 @@ package com.squareup.anvil.compiler.api
 public enum class AnalysisBackend {
   /** Anvil runs as a direct compiler plugin inside compileKotlin tasks. */
   EMBEDDED,
-
-  /** Anvil runs as a Kotlin Symbol Processor (KSP). */
-  KSP,
 }

compiler-api/src/main/java/com/squareup/anvil/compiler/api/AnvilContext.kt

@@ -60,7 +60,6 @@ public interface AnvilContext {
    * These models could be generated by any of:
    * - Anvil via the [generateFactories] option
    * - Dagger via KAPT
-   * - Dagger via KSP
    */
   public val willHaveDaggerFactories: Boolean
 

compiler-api/src/main/java/com/squareup/anvil/compiler/api/ComponentMergingBackend.kt

@@ -4,7 +4,4 @@ package com.squareup.anvil.compiler.api
 public enum class ComponentMergingBackend {
   /** Component merging runs as an IR plugin during kapt stub generation. */
   IR,
-
-  /** Component merging runs as a Kotlin Symbol Processor (KSP) with dagger KSP. */
-  KSP,
 }

compiler-utils/build.gradle.kts

@@ -31,7 +31,6 @@ dependencies {
   implementation(libs.inject)
 
   testFixturesApi(libs.kotlin.compileTesting)
-  testFixturesApi(libs.kotlin.compileTesting.ksp)
   testFixturesImplementation(project(":compiler"))
   testFixturesImplementation(libs.dagger2.compiler)
   testFixturesImplementation(libs.dagger2)
@@ -48,7 +47,6 @@ dependencies {
     compileOnly(libs.dagger2.compiler)
     compileOnly(libs.junit)
     compileOnly(libs.kotlin.compileTesting)
-    compileOnly(libs.kotlin.compileTesting.ksp)
     compileOnly(libs.truth)
   }
 }

compiler-utils/dependencies/testFixturesRuntimeClasspath.txt

@@ -5,10 +5,7 @@ com.google.code.findbugs:jsr305:3.0.2
 com.google.dagger:dagger-compiler:2.52
 com.google.dagger:dagger-spi:2.52
 com.google.dagger:dagger:2.52
-com.google.devtools.ksp:symbol-processing-aa-embeddable:2.0.0-1.0.22
-com.google.devtools.ksp:symbol-processing-api:2.0.0-1.0.22
-com.google.devtools.ksp:symbol-processing-common-deps:2.0.0-1.0.22
-com.google.devtools.ksp:symbol-processing:2.0.0-1.0.22
+com.google.devtools.ksp:symbol-processing-api:1.9.24-1.0.20
 com.google.errorprone:error_prone_annotations:2.28.0
 com.google.errorprone:javac-shaded:9-dev-r4023-3
 com.google.googlejavaformat:google-java-format:1.5
@@ -20,10 +17,8 @@ com.squareup.okio:okio-jvm:3.9.0
 com.squareup.okio:okio:3.9.0
 com.squareup:javapoet:1.13.0
 com.squareup:kotlinpoet-jvm:1.18.1
-com.squareup:kotlinpoet-ksp:1.18.1
 com.squareup:kotlinpoet:1.18.1
 dev.zacsweers.kctfork:core:0.5.1
-dev.zacsweers.kctfork:ksp:0.5.1
 io.github.classgraph:classgraph:4.8.174
 jakarta.inject:jakarta.inject-api:2.0.1
 javax.annotation:jsr250-api:1.0
@@ -41,6 +36,8 @@ org.jetbrains.kotlin:kotlin-compiler-embeddable:2.0.21
 org.jetbrains.kotlin:kotlin-daemon-embeddable:2.0.21
 org.jetbrains.kotlin:kotlin-reflect:2.0.21
 org.jetbrains.kotlin:kotlin-script-runtime:2.0.21
+org.jetbrains.kotlin:kotlin-stdlib-jdk7:2.0.21
+org.jetbrains.kotlin:kotlin-stdlib-jdk8:2.0.21
 org.jetbrains.kotlin:kotlin-stdlib:2.0.21
 org.jetbrains.kotlinx:kotlinx-coroutines-core-jvm:1.6.4
 org.jetbrains:annotations:13.0

compiler-utils/src/testFixtures/java/com/squareup/anvil/compiler/internal/testing/AnvilCompilation.kt

@@ -2,30 +2,22 @@ package com.squareup.anvil.compiler.internal.testing
 
 import com.google.auto.value.processor.AutoAnnotationProcessor
 import com.google.common.truth.Truth.assertWithMessage
-import com.google.devtools.ksp.processing.SymbolProcessorProvider
 import com.squareup.anvil.annotations.ExperimentalAnvilApi
 import com.squareup.anvil.compiler.AnvilCommandLineProcessor
 import com.squareup.anvil.compiler.AnvilComponentRegistrar
 import com.squareup.anvil.compiler.internal.testing.AnvilCompilationMode.Embedded
-import com.squareup.anvil.compiler.internal.testing.AnvilCompilationMode.Ksp
 import com.tschuchort.compiletesting.JvmCompilationResult
 import com.tschuchort.compiletesting.KotlinCompilation
 import com.tschuchort.compiletesting.PluginOption
 import com.tschuchort.compiletesting.SourceFile
 import com.tschuchort.compiletesting.addPreviousResultToClasspath
-import com.tschuchort.compiletesting.kspProcessorOptions
-import com.tschuchort.compiletesting.kspWithCompilation
-import com.tschuchort.compiletesting.symbolProcessorProviders
 import dagger.internal.codegen.ComponentProcessor
-import dagger.internal.codegen.KspComponentProcessor
 import org.intellij.lang.annotations.Language
 import org.jetbrains.kotlin.config.JvmTarget
 import org.jetbrains.kotlin.config.LanguageVersion
 import java.io.File
 import java.io.OutputStream
 import java.nio.file.Files
-import java.util.Locale
-import java.util.ServiceLoader
 
 /**
  * A simple API over a [KotlinCompilation] with extra configuration support for Anvil.
@@ -78,11 +70,6 @@ public class AnvilCompilation internal constructor(
           optionName = "disable-component-merging",
           optionValue = disableComponentMerging.toString(),
         ),
-        PluginOption(
-          pluginId = anvilCommandLineProcessor.pluginId,
-          optionName = "analysis-backend",
-          optionValue = mode.analysisBackend.name.lowercase(Locale.US),
-        ),
         PluginOption(
           pluginId = anvilCommandLineProcessor.pluginId,
           optionName = "ir-merges-file",
@@ -137,29 +124,6 @@ public class AnvilCompilation internal constructor(
               ),
             )
         }
-
-        is Ksp -> {
-          symbolProcessorProviders += buildList {
-            addAll(
-              ServiceLoader.load(
-                SymbolProcessorProvider::class.java,
-                SymbolProcessorProvider::class.java.classLoader,
-              )
-                // TODO for now, we don't want to run the dagger KSP processor while we're testing
-                //  KSP. This will change when we start supporting dagger-KSP, at which point we can
-                //  change this filter to be based on https://github.com/square/anvil/pull/713
-                .filterNot { it is KspComponentProcessor.Provider },
-            )
-            addAll(mode.symbolProcessorProviders)
-          }
-          // Run KSP embedded directly within this kotlinc invocation
-          kspWithCompilation = true
-          kspProcessorOptions["will-have-dagger-factories"] = generateDaggerFactories.toString()
-          kspProcessorOptions["generate-dagger-factories"] = generateDaggerFactories.toString()
-          kspProcessorOptions["generate-dagger-factories-only"] =
-            generateDaggerFactoriesOnly.toString()
-          kspProcessorOptions["disable-component-merging"] = disableComponentMerging.toString()
-        }
       }
 
       if (enableExperimentalAnvilApis) {

compiler-utils/src/testFixtures/java/com/squareup/anvil/compiler/internal/testing/AnvilCompilationMode.kt

@@ -1,16 +1,14 @@
 package com.squareup.anvil.compiler.internal.testing
 
-import com.google.devtools.ksp.processing.SymbolProcessorProvider
 import com.squareup.anvil.compiler.api.AnalysisBackend
 import com.squareup.anvil.compiler.api.AnalysisBackend.EMBEDDED
-import com.squareup.anvil.compiler.api.AnalysisBackend.KSP
 import com.squareup.anvil.compiler.api.CodeGenerator
 
+// TODO: Repurpose this as a way to pass a spec into `compile(...)` in tests,
+//  instead of individual flags.
+//  This is left in place for now because it's already wired up everywhere.
 public sealed class AnvilCompilationMode(public val analysisBackend: AnalysisBackend) {
   public data class Embedded(
     val codeGenerators: List<CodeGenerator> = emptyList(),
   ) : AnvilCompilationMode(EMBEDDED)
-  public data class Ksp(
-    val symbolProcessorProviders: List<SymbolProcessorProvider> = emptyList(),
-  ) : AnvilCompilationMode(KSP)
 }

compiler/api/compiler.api

@@ -14,9 +14,7 @@ public final class com/squareup/anvil/compiler/AnvilComponentRegistrar : org/jet
 
 public final class com/squareup/anvil/compiler/CommandLineOptions {
 	public static final field Companion Lcom/squareup/anvil/compiler/CommandLineOptions$Companion;
-	public synthetic fun <init> (ZZZZZLcom/squareup/anvil/compiler/api/AnalysisBackend;Lcom/squareup/anvil/compiler/api/ComponentMergingBackend;Lkotlin/jvm/internal/DefaultConstructorMarker;)V
-	public final fun getBackend ()Lcom/squareup/anvil/compiler/api/AnalysisBackend;
-	public final fun getComponentMergingBackend ()Lcom/squareup/anvil/compiler/api/ComponentMergingBackend;
+	public synthetic fun <init> (ZZZZZLkotlin/jvm/internal/DefaultConstructorMarker;)V
 	public final fun getDisableComponentMerging ()Z
 	public final fun getGenerateFactories ()Z
 	public final fun getGenerateFactoriesOnly ()Z

compiler/build.gradle.kts

@@ -11,7 +11,6 @@ buildConfig {
   useKotlinOutput { topLevelConstants = true }
 
   buildConfigField("boolean", "FULL_TEST_RUN", libs.versions.config.fullTestRun.get())
-  buildConfigField("boolean", "INCLUDE_KSP_TESTS", libs.versions.config.includeKspTests.get())
 }
 
 conventions {
@@ -41,12 +40,9 @@ dependencies {
   implementation(libs.dagger2)
   implementation(libs.jsr250)
   implementation(libs.kotlinpoet)
-  implementation(libs.kotlinpoet.ksp)
 
   compileOnly(libs.auto.service.annotations)
   compileOnly(libs.kotlin.compiler)
-  compileOnly(libs.ksp.compilerPlugin)
-  compileOnly(libs.ksp.api)
 
   kapt(libs.auto.service.processor)
 
@@ -58,11 +54,9 @@ dependencies {
   testImplementation(libs.kotest.assertions.core.jvm)
   testImplementation(libs.kotlin.annotationProcessingEmbeddable)
   testImplementation(libs.kotlin.compileTesting)
-  testImplementation(libs.kotlin.compileTesting.ksp)
   testImplementation(libs.kotlin.compiler)
   testImplementation(libs.kotlin.test)
   testImplementation(libs.kotlin.reflect)
-  testImplementation(libs.ksp.compilerPlugin)
   testImplementation(libs.truth)
 
   testRuntimeOnly(libs.kotest.assertions.core.jvm)

compiler/dependencies/runtimeClasspath.txt

@@ -1,6 +1,5 @@
 com.google.dagger:dagger:2.52
 com.squareup:kotlinpoet-jvm:1.18.1
-com.squareup:kotlinpoet-ksp:1.18.1
 com.squareup:kotlinpoet:1.18.1
 jakarta.inject:jakarta.inject-api:2.0.1
 javax.annotation:jsr250-api:1.0

compiler/src/main/java/com/squareup/anvil/compiler/AnvilCommandLineProcessor.kt

@@ -1,8 +1,6 @@
 package com.squareup.anvil.compiler
 
 import com.google.auto.service.AutoService
-import com.squareup.anvil.compiler.api.AnalysisBackend
-import com.squareup.anvil.compiler.api.ComponentMergingBackend
 import org.jetbrains.kotlin.compiler.plugin.AbstractCliOption
 import org.jetbrains.kotlin.compiler.plugin.CliOption
 import org.jetbrains.kotlin.compiler.plugin.CommandLineProcessor
@@ -49,14 +47,6 @@ internal const val willHaveDaggerFactoriesName = "will-have-dagger-factories"
 internal val willHaveDaggerFactoriesKey =
   CompilerConfigurationKey.create<Boolean>("anvil $willHaveDaggerFactoriesName")
 
-internal const val analysisBackendName = "analysis-backend"
-internal val analysisBackendKey =
-  CompilerConfigurationKey.create<String>("anvil $analysisBackendName")
-
-internal const val mergingBackendName = "merging-backend"
-internal val mergingBackendKey =
-  CompilerConfigurationKey.create<String>("anvil $mergingBackendName")
-
 /**
  * Parses arguments from the Gradle plugin for the compiler plugin.
  */
@@ -141,20 +131,6 @@ public class AnvilCommandLineProcessor : CommandLineProcessor {
       required = false,
       allowMultipleOccurrences = false,
     ),
-    CliOption(
-      optionName = analysisBackendName,
-      valueDescription = AnalysisBackend.entries.joinToString("|", "<", ">"),
-      description = "Controls whether Anvil analysis is running as an embedded plugin or as KSP.",
-      required = false,
-      allowMultipleOccurrences = false,
-    ),
-    CliOption(
-      optionName = mergingBackendName,
-      valueDescription = ComponentMergingBackend.entries.joinToString("|", "<", ">"),
-      description = "Controls whether module merging is running as an IR plugin or as KSP.",
-      required = false,
-      allowMultipleOccurrences = false,
-    ),
   )
 
   override fun processOption(
@@ -183,8 +159,6 @@ public class AnvilCommandLineProcessor : CommandLineProcessor {
 
       trackSourceFilesName ->
         configuration.put(trackSourceFilesKey, value.toBoolean())
-
-      analysisBackendName -> configuration.put(analysisBackendKey, value)
     }
   }
 }

compiler/src/main/java/com/squareup/anvil/compiler/AnvilComponentRegistrar.kt

@@ -6,9 +6,7 @@ package com.squareup.anvil.compiler
 import com.google.auto.service.AutoService
 import com.squareup.anvil.annotations.ExperimentalAnvilApi
 import com.squareup.anvil.compiler.CommandLineOptions.Companion.commandLineOptions
-import com.squareup.anvil.compiler.api.AnalysisBackend
 import com.squareup.anvil.compiler.api.CodeGenerator
-import com.squareup.anvil.compiler.api.ComponentMergingBackend
 import com.squareup.anvil.compiler.codegen.CodeGenerationExtension
 import com.squareup.anvil.compiler.codegen.ContributesSubcomponentHandlerGenerator
 import com.squareup.anvil.compiler.codegen.incremental.BaseDir
@@ -50,25 +48,15 @@ public class AnvilComponentRegistrar : ComponentRegistrar {
     val mergingEnabled =
       !commandLineOptions.generateFactoriesOnly && !commandLineOptions.disableComponentMerging
     if (mergingEnabled) {
-      if (commandLineOptions.componentMergingBackend == ComponentMergingBackend.IR) {
-        IrGenerationExtension.registerExtension(
-          project,
-          IrContributionMerger(
-            classScanner = scanner,
-            moduleDescriptorFactory = moduleDescriptorFactory,
-            trackSourceFiles = trackSourceFiles,
-            irMergesFile = irMergesFile,
-          ),
-        )
-      } else {
-        // TODO in dagger-ksp support
-      }
-    }
-
-    // Everything below this point is only when running in embedded compilation mode. If running in
-    // KSP, there's nothing else to do.
-    if (commandLineOptions.backend != AnalysisBackend.EMBEDDED) {
-      return
+      IrGenerationExtension.registerExtension(
+        project,
+        IrContributionMerger(
+          classScanner = scanner,
+          moduleDescriptorFactory = moduleDescriptorFactory,
+          trackSourceFiles = trackSourceFiles,
+          irMergesFile = irMergesFile,
+        ),
+      )
     }
 
     val sourceGenFolder = configuration.getNotNull(srcGenDirKey)

compiler/src/main/java/com/squareup/anvil/compiler/CommandLineOptions.kt

@@ -1,18 +1,13 @@
 package com.squareup.anvil.compiler
 
-import com.squareup.anvil.compiler.api.AnalysisBackend
-import com.squareup.anvil.compiler.api.ComponentMergingBackend
 import org.jetbrains.kotlin.config.CompilerConfiguration
-import java.util.Locale
 
 public class CommandLineOptions private constructor(
   public val generateFactories: Boolean,
   public val generateFactoriesOnly: Boolean,
   public val disableComponentMerging: Boolean,
   public val trackSourceFiles: Boolean,
   public val willHaveDaggerFactories: Boolean,
-  public val backend: AnalysisBackend,
-  public val componentMergingBackend: ComponentMergingBackend,
 ) {
   public companion object {
     public val CompilerConfiguration.commandLineOptions: CommandLineOptions
@@ -22,24 +17,6 @@ public class CommandLineOptions private constructor(
         disableComponentMerging = get(disableComponentMergingKey, false),
         trackSourceFiles = get(trackSourceFilesKey, true),
         willHaveDaggerFactories = get(willHaveDaggerFactoriesKey, false),
-        backend = parseBackend(),
-        componentMergingBackend = parseComponentMergingBackend(),
       )
-
-    private fun CompilerConfiguration.parseBackend(): AnalysisBackend {
-      val config = get(analysisBackendKey, AnalysisBackend.EMBEDDED.name)
-      return config
-        .uppercase(Locale.US)
-        .let { value -> AnalysisBackend.entries.find { it.name == value } }
-        ?: error("Unknown backend option: '$config'")
-    }
-
-    private fun CompilerConfiguration.parseComponentMergingBackend(): ComponentMergingBackend {
-      val config = get(mergingBackendKey, ComponentMergingBackend.IR.name)
-      return config
-        .uppercase(Locale.US)
-        .let { value -> ComponentMergingBackend.entries.find { it.name == value } }
-        ?: error("Unknown backend option: '$config'")
-    }
   }
 }