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erikkerbererikkerber
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Add experimental Kotlin incremental compilation
Replace commented out snapshot generation code Add new jar dependencies needed for incremental compilation Temporarily force persistent working directory for incremental compilation
1 parent cb8b7be commit 40d6189

19 files changed

+1516
-53
lines changed

‎MODULE.bazel

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@@ -29,7 +29,9 @@ use_repo(
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"com_github_jetbrains_kotlin",
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"com_github_jetbrains_kotlin_git",
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"com_github_pinterest_ktlint",
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"kotlin_build_tools_api",
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"kotlin_build_tools_impl",
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"kotlin_compiler_embeddable",
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"kotlinx_serialization_core_jvm",
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"kotlinx_serialization_json",
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"kotlinx_serialization_json_jvm",

‎kotlin/internal/jvm/compile.bzl

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@@ -463,6 +463,7 @@ def _run_kt_builder_action(
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args.add_all("--classpath", compile_deps.compile_jars)
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args.add("--reduced_classpath_mode", toolchains.kt.experimental_reduce_classpath_mode)
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args.add("--build_tools_api", toolchains.kt.experimental_build_tools_api)
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args.add("--incremental_compilation", toolchains.kt.experimental_incremental_compilation)
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args.add_all("--sources", srcs.all_srcs, omit_if_empty = True)
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args.add_all("--source_jars", srcs.src_jars + generated_src_jars, omit_if_empty = True)
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args.add_all("--deps_artifacts", deps_artifacts, omit_if_empty = True)

‎kotlin/internal/toolchains.bzl

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@@ -92,6 +92,7 @@ def _kotlin_toolchain_impl(ctx):
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experimental_report_unused_deps = ctx.attr.experimental_report_unused_deps,
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experimental_reduce_classpath_mode = ctx.attr.experimental_reduce_classpath_mode,
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experimental_build_tools_api = ctx.attr.experimental_build_tools_api,
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experimental_incremental_compilation = ctx.attr.experimental_incremental_compilation,
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javac_options = ctx.attr.javac_options[JavacOptions] if ctx.attr.javac_options else None,
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kotlinc_options = ctx.attr.kotlinc_options[KotlincOptions] if ctx.attr.kotlinc_options else None,
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empty_jar = ctx.file._empty_jar,
@@ -252,6 +253,10 @@ _kt_toolchain = rule(
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doc = "Enables experimental support for Build Tools API integration",
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default = False,
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),
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"experimental_incremental_compilation": attr.bool(
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doc = "TODO",
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default = False,
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),
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"javac_options": attr.label(
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doc = "Compiler options for javac",
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providers = [JavacOptions],
@@ -327,6 +332,7 @@ def define_kt_toolchain(
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experimental_reduce_classpath_mode = None,
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experimental_multiplex_workers = None,
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experimental_build_tools_api = None,
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experimental_incremental_compilation = None,
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javac_options = Label("//kotlin/internal:default_javac_options"),
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kotlinc_options = Label("//kotlin/internal:default_kotlinc_options"),
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jvm_stdlibs = None,
@@ -356,6 +362,7 @@ def define_kt_toolchain(
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experimental_report_unused_deps = experimental_report_unused_deps,
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experimental_reduce_classpath_mode = experimental_reduce_classpath_mode,
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experimental_build_tools_api = experimental_build_tools_api,
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experimental_incremental_compilation = experimental_incremental_compilation,
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javac_options = javac_options,
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kotlinc_options = kotlinc_options,
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visibility = ["//visibility:public"],

‎kotlin/settings/BUILD.bazel

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@@ -48,3 +48,9 @@ bool_flag(
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build_setting_default = False,
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visibility = ["//visibility:public"],
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)
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bool_flag(
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name = "experimental_incremental_compilation",
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build_setting_default = False,
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visibility = ["//visibility:public"],
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)

‎kotlin_rules_maven_install.json

Lines changed: 1232 additions & 36 deletions
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‎src/main/kotlin/io/bazel/kotlin/builder/cmd/BUILD.bazel

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@@ -27,6 +27,8 @@ kt_bootstrap_binary(
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"//src/main/kotlin/io/bazel/kotlin/compiler:compiler.jar",
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"@com_github_jetbrains_kotlin//:home",
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"@kotlin_build_tools_impl//jar",
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"@kotlin_compiler_embeddable//jar",
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"@kotlin_rules_maven//:org_jetbrains_kotlin_kotlin_daemon_client",
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"@kotlinx_serialization_core_jvm//jar",
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"@kotlinx_serialization_json//jar",
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"@kotlinx_serialization_json_jvm//jar",
@@ -36,10 +38,12 @@ kt_bootstrap_binary(
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"-D@com_github_jetbrains_kotlinx...serialization-json=$(rlocationpath @kotlinx_serialization_json//jar)",
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"-D@com_github_jetbrains_kotlinx...serialization-json-jvm=$(rlocationpath @kotlinx_serialization_json_jvm//jar)",
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"-D@com_github_jetbrains_kotlin...build-tools-impl=$(rlocationpath @kotlin_build_tools_impl//jar)",
41+
"-D@kotlin_compiler_embeddable...kotlin-embedded=$(rlocationpath @kotlin_compiler_embeddable//jar)",
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"-D@com_github_jetbrains_kotlin...jvm-abi-gen=$(rlocationpath //kotlin/compiler:jvm-abi-gen)",
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"-D@com_github_jetbrains_kotlin...kotlin-compiler=$(rlocationpath //kotlin/compiler:kotlin-compiler)",
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"-D@com_github_jetbrains_kotlin...kapt=$(rlocationpath //kotlin/compiler:kotlin-annotation-processing)",
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"-D@rules_kotlin...jdeps-gen=$(rlocationpath //src/main/kotlin:jdeps-gen)",
46+
"-D@com_github_jetbrains_kotlin...daemon-client=$(rlocationpath @kotlin_rules_maven//:org_jetbrains_kotlin_kotlin_daemon_client)",
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"-D@rules_kotlin...skip-code-gen=$(rlocationpath //src/main/kotlin:skip-code-gen)",
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"-D@rules_kotlin...compiler=$(rlocationpath //src/main/kotlin/io/bazel/kotlin/compiler:compiler.jar)",
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"-D@com_github_google_ksp...symbol-processing-api=$(rlocationpath //kotlin/compiler:symbol-processing-api)",

‎src/main/kotlin/io/bazel/kotlin/builder/tasks/BUILD.bazel

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@@ -24,6 +24,7 @@ kt_bootstrap_library(
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],
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visibility = ["//src:__subpackages__"],
2626
deps = [
27+
"//kotlin/compiler:kotlin-compiler",
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"//kotlin/compiler:kotlin-preloader",
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"//src/main/kotlin/io/bazel/kotlin/builder/toolchain",
2930
"//src/main/kotlin/io/bazel/kotlin/builder/utils",
@@ -32,6 +33,9 @@ kt_bootstrap_library(
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"//src/main/protobuf:deps_java_proto",
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"//src/main/protobuf:kotlin_model_java_proto",
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"//src/main/protobuf:worker_protocol_java_proto",
36+
"@kotlin_build_tools_api//jar",
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"@kotlin_build_tools_impl//jar",
38+
"@kotlin_compiler_embeddable//jar",
3539
"@kotlin_rules_maven//:com_google_protobuf_protobuf_java",
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"@kotlin_rules_maven//:com_google_protobuf_protobuf_java_util",
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"@kotlin_rules_maven//:javax_inject_javax_inject",

‎src/main/kotlin/io/bazel/kotlin/builder/tasks/KotlinBuilder.kt

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@@ -88,6 +88,7 @@ class KotlinBuilder
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INSTRUMENT_COVERAGE("--instrument_coverage"),
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KSP_GENERATED_JAVA_SRCJAR("--ksp_generated_java_srcjar"),
9090
BUILD_TOOLS_API("--build_tools_api"),
91+
INCREMENTAL_COMPILATION("--incremental_compilation"),
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}
9293
}
9394

@@ -173,6 +174,9 @@ class KotlinBuilder
173174
argMap.optionalSingle(KotlinBuilderFlags.BUILD_TOOLS_API)?.let {
174175
buildToolsApi = it == "true"
175176
}
177+
argMap.optionalSingle(KotlinBuilderFlags.INCREMENTAL_COMPILATION)?.let {
178+
incrementalCompilation = it == "true"
179+
}
176180
this
177181
}
178182

‎src/main/kotlin/io/bazel/kotlin/builder/tasks/jvm/ClasspathSnapshotGenerator.kt

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@@ -0,0 +1,31 @@
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package io.bazel.kotlin.builder.tasks.jvm
2+
3+
import java.nio.file.Path
4+
import kotlin.system.measureTimeMillis
5+
import org.jetbrains.kotlin.buildtools.api.CompilationService
6+
import org.jetbrains.kotlin.buildtools.api.ExperimentalBuildToolsApi
7+
import org.jetbrains.kotlin.buildtools.api.KotlinLogger
8+
import java.io.File
9+
import java.util.logging.Logger
10+
import kotlin.io.path.exists
11+
12+
@OptIn(ExperimentalBuildToolsApi::class)
13+
class ClasspathSnapshotGenerator(
14+
private val inputJar: Path,
15+
private val outputSnapshot: Path,
16+
private val granularity: SnapshotGranularity
17+
) {
18+
19+
fun run() {
20+
// if (outputSnapshot.exists()) { return }
21+
val timeSpent = measureTimeMillis {
22+
val compilationService = CompilationService.loadImplementation(this.javaClass.classLoader!!)
23+
val snapshot =
24+
compilationService.calculateClasspathSnapshot(
25+
inputJar.toFile(), granularity.toClassSnapshotGranularity)
26+
snapshot.saveSnapshot(outputSnapshot.toFile())
27+
}
28+
// TODO: Log impl
29+
// LOG.info("$timeSpent ms for input jar: $inputJar")
30+
}
31+
}

‎src/main/kotlin/io/bazel/kotlin/builder/tasks/jvm/CompilationTask.kt

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@@ -35,6 +35,7 @@ import java.io.BufferedInputStream
3535
import java.io.ByteArrayOutputStream
3636
import java.io.File
3737
import java.io.ObjectOutputStream
38+
import java.nio.file.FileSystems
3839
import java.nio.file.Files
3940
import java.nio.file.Files.isDirectory
4041
import java.nio.file.Files.walk
@@ -91,6 +92,11 @@ fun JvmCompilationTask.baseArgs(overrides: Map<String, String> = emptyMap()): Co
9192
overrides[LANGUAGE_VERSION_ARG] ?: info.toolchainInfo.common.languageVersion,
9293
).flag("-jvm-target", info.toolchainInfo.jvm.jvmTarget)
9394
.flag("-module-name", info.moduleName)
95+
.apply {
96+
if (info.buildToolsApi) {
97+
flag("-label", info.label)
98+
}
99+
}
94100
}
95101

96102
internal fun JvmCompilationTask.plugins(
@@ -308,8 +314,13 @@ private fun JvmCompilationTask.runKspPlugin(
308314
baseArgs(overrides)
309315
.plus(kspArgs(plugins))
310316
.flag("-d", directories.generatedClasses)
311-
.values(inputs.kotlinSourcesList)
312317
.values(inputs.javaSourcesList)
318+
.values(inputs.kotlinSourcesList)
319+
.apply {
320+
if (info.incrementalCompilation) {
321+
flag("-incremental_id", "ksp")
322+
}
323+
}
313324
.list()
314325
.let { args ->
315326
context.executeCompilerTask(
@@ -422,6 +433,28 @@ internal fun JvmCompilationTask.createGeneratedKspKotlinSrcJar() {
422433
}
423434
}
424435

436+
internal fun JvmCompilationTask.createClasspathSnapshots() {
437+
inputs.classpathList.forEach {
438+
ClasspathSnapshotGenerator(Paths.get(it), Paths.get("$it.snapshot"), SnapshotGranularity.CLASS_MEMBER_LEVEL).run()
439+
}
440+
}
441+
442+
internal fun JvmCompilationTask.createClasspathSnapshotsPaths(): List<String> {
443+
return inputs.classpathList.map { it: String ->
444+
"$it.snapshot"
445+
}
446+
}
447+
448+
449+
val ROOT: String by lazy {
450+
FileSystems
451+
.getDefault()
452+
.getPath("")
453+
.toAbsolutePath()
454+
.toString() + File.separator
455+
}
456+
457+
425458
/**
426459
* Compiles Kotlin sources to classes. Does not compile Java sources.
427460
*/
@@ -441,9 +474,23 @@ fun JvmCompilationTask.compileKotlin(
441474
options = inputs.compilerPluginOptionsList,
442475
classpath = inputs.compilerPluginClasspathList,
443476
)
444-
).values(inputs.javaSourcesList)
477+
)
478+
.values(inputs.javaSourcesList)
445479
.values(inputs.kotlinSourcesList)
446480
.flag("-d", directories.classes)
481+
.apply {
482+
if (info.incrementalCompilation) {
483+
flag("-incremental_id", "kotlin")
484+
flag("-snapshot")
485+
paths(
486+
createClasspathSnapshotsPaths(),
487+
) {
488+
it
489+
.map(Path::toString)
490+
.joinToString(File.pathSeparator)
491+
}
492+
}
493+
}
447494
.list()
448495
.let {
449496
context.whenTracing {

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