Add experimental Build Tools API (BTAPI) for compilation

Author: erikkerber

docs/kotlin.md

@@ -515,9 +515,9 @@ define_kt_toolchain(<a href="#define_kt_toolchain-name">name</a>, <a href="#defi
                     <a href="#define_kt_toolchain-experimental_treat_internal_as_private_in_abi_jars">experimental_treat_internal_as_private_in_abi_jars</a>,
                     <a href="#define_kt_toolchain-experimental_remove_private_classes_in_abi_jars">experimental_remove_private_classes_in_abi_jars</a>, <a href="#define_kt_toolchain-experimental_strict_kotlin_deps">experimental_strict_kotlin_deps</a>,
                     <a href="#define_kt_toolchain-experimental_report_unused_deps">experimental_report_unused_deps</a>, <a href="#define_kt_toolchain-experimental_reduce_classpath_mode">experimental_reduce_classpath_mode</a>,
-                    <a href="#define_kt_toolchain-experimental_multiplex_workers">experimental_multiplex_workers</a>, <a href="#define_kt_toolchain-javac_options">javac_options</a>, <a href="#define_kt_toolchain-kotlinc_options">kotlinc_options</a>, <a href="#define_kt_toolchain-jvm_stdlibs">jvm_stdlibs</a>,
-                    <a href="#define_kt_toolchain-jvm_runtime">jvm_runtime</a>, <a href="#define_kt_toolchain-jacocorunner">jacocorunner</a>, <a href="#define_kt_toolchain-exec_compatible_with">exec_compatible_with</a>, <a href="#define_kt_toolchain-target_compatible_with">target_compatible_with</a>,
-                    <a href="#define_kt_toolchain-target_settings">target_settings</a>)
+                    <a href="#define_kt_toolchain-experimental_multiplex_workers">experimental_multiplex_workers</a>, <a href="#define_kt_toolchain-experimental_build_tools_api">experimental_build_tools_api</a>, <a href="#define_kt_toolchain-javac_options">javac_options</a>,
+                    <a href="#define_kt_toolchain-kotlinc_options">kotlinc_options</a>, <a href="#define_kt_toolchain-jvm_stdlibs">jvm_stdlibs</a>, <a href="#define_kt_toolchain-jvm_runtime">jvm_runtime</a>, <a href="#define_kt_toolchain-jacocorunner">jacocorunner</a>, <a href="#define_kt_toolchain-exec_compatible_with">exec_compatible_with</a>,
+                    <a href="#define_kt_toolchain-target_compatible_with">target_compatible_with</a>, <a href="#define_kt_toolchain-target_settings">target_settings</a>)
 </pre>
 
 Define the Kotlin toolchain.
@@ -538,6 +538,7 @@ Define the Kotlin toolchain.
 | <a id="define_kt_toolchain-experimental_report_unused_deps"></a>experimental_report_unused_deps |  <p align="center"> - </p>   |  `None` |
 | <a id="define_kt_toolchain-experimental_reduce_classpath_mode"></a>experimental_reduce_classpath_mode |  <p align="center"> - </p>   |  `None` |
 | <a id="define_kt_toolchain-experimental_multiplex_workers"></a>experimental_multiplex_workers |  <p align="center"> - </p>   |  `None` |
+| <a id="define_kt_toolchain-experimental_build_tools_api"></a>experimental_build_tools_api |  <p align="center"> - </p>   |  `None` |
 | <a id="define_kt_toolchain-javac_options"></a>javac_options |  <p align="center"> - </p>   |  `Label("@rules_kotlin//kotlin/internal:default_javac_options")` |
 | <a id="define_kt_toolchain-kotlinc_options"></a>kotlinc_options |  <p align="center"> - </p>   |  `Label("@rules_kotlin//kotlin/internal:default_kotlinc_options")` |
 | <a id="define_kt_toolchain-jvm_stdlibs"></a>jvm_stdlibs |  <p align="center"> - </p>   |  `None` |

kotlin/internal/jvm/compile.bzl

@@ -462,6 +462,7 @@ def _run_kt_builder_action(
     args.add("--strict_kotlin_deps", toolchains.kt.experimental_strict_kotlin_deps)
     args.add_all("--classpath", compile_deps.compile_jars)
     args.add("--reduced_classpath_mode", toolchains.kt.experimental_reduce_classpath_mode)
+    args.add("--build_tools_api", toolchains.kt.experimental_build_tools_api)
     args.add_all("--sources", srcs.all_srcs, omit_if_empty = True)
     args.add_all("--source_jars", srcs.src_jars + generated_src_jars, omit_if_empty = True)
     args.add_all("--deps_artifacts", deps_artifacts, omit_if_empty = True)

kotlin/internal/toolchains.bzl

@@ -91,6 +91,7 @@ def _kotlin_toolchain_impl(ctx):
         experimental_strict_kotlin_deps = ctx.attr.experimental_strict_kotlin_deps,
         experimental_report_unused_deps = ctx.attr.experimental_report_unused_deps,
         experimental_reduce_classpath_mode = ctx.attr.experimental_reduce_classpath_mode,
+        experimental_build_tools_api = ctx.attr.experimental_build_tools_api,
         javac_options = ctx.attr.javac_options[JavacOptions] if ctx.attr.javac_options else None,
         kotlinc_options = ctx.attr.kotlinc_options[KotlincOptions] if ctx.attr.kotlinc_options else None,
         empty_jar = ctx.file._empty_jar,
@@ -247,6 +248,10 @@ _kt_toolchain = rule(
                 "KOTLINBUILDER_REDUCED",
             ],
         ),
+        "experimental_build_tools_api": attr.bool(
+            doc = "Enables experimental support for Build Tools API integration",
+            default = False,
+        ),
         "javac_options": attr.label(
             doc = "Compiler options for javac",
             providers = [JavacOptions],
@@ -321,6 +326,7 @@ def define_kt_toolchain(
         experimental_report_unused_deps = None,
         experimental_reduce_classpath_mode = None,
         experimental_multiplex_workers = None,
+        experimental_build_tools_api = None,
         javac_options = Label("//kotlin/internal:default_javac_options"),
         kotlinc_options = Label("//kotlin/internal:default_kotlinc_options"),
         jvm_stdlibs = None,
@@ -349,6 +355,7 @@ def define_kt_toolchain(
         experimental_strict_kotlin_deps = experimental_strict_kotlin_deps,
         experimental_report_unused_deps = experimental_report_unused_deps,
         experimental_reduce_classpath_mode = experimental_reduce_classpath_mode,
+        experimental_build_tools_api = experimental_build_tools_api,
         javac_options = javac_options,
         kotlinc_options = kotlinc_options,
         visibility = ["//visibility:public"],

kotlin/settings/BUILD.bazel

@@ -42,3 +42,9 @@ bool_flag(
     build_setting_default = False,
     visibility = ["//visibility:public"],
 )
+
+bool_flag(
+    name = "experimental_build_tools_api",
+    build_setting_default = False,
+    visibility = ["//visibility:public"],
+)