Update defaults and add toolchain to actions

Author: restingbull

kotlin/internal/jvm/compile.bzl

@@ -294,6 +294,7 @@ def _fold_jars_action(ctx, rule_kind, toolchains, output_jar, input_jars, action
             "" if not action_type else " (%s)" % action_type,
             len(input_jars),
         ),
+        toolchain = _TOOLCHAIN_TYPE,
     )
 
 def _resourcejar_args_action(ctx):
@@ -369,6 +370,7 @@ def _run_merge_jdeps_action(ctx, toolchains, jdeps, outputs, deps):
             args,
         ],
         progress_message = progress_message,
+        toolchain = _TOOLCHAIN_TYPE,
     )
 
 def _run_kapt_builder_actions(
@@ -574,6 +576,7 @@ def _run_kt_builder_action(
             "LC_CTYPE": "en_US.UTF-8",  # For Java source files
             "REPOSITORY_NAME": _utils.builder_workspace_name(ctx),
         },
+        toolchain = _TOOLCHAIN_TYPE,
     )
 
 # MAIN ACTIONS #########################################################################################################

kotlin/internal/toolchains.bzl

@@ -126,7 +126,7 @@ _kt_toolchain = rule(
         ),
         "language_version": attr.string(
             doc = "this is the -language_version flag [see](https://kotlinlang.org/docs/reference/compatibility.html)",
-            default = "1.9",
+            default = "2.1",
             values = [
                 "1.1",
                 "1.2",
@@ -138,11 +138,12 @@ _kt_toolchain = rule(
                 "1.8",
                 "1.9",
                 "2.0",
+                "2.1",
             ],
         ),
         "api_version": attr.string(
             doc = "this is the -api_version flag [see](https://kotlinlang.org/docs/reference/compatibility.html).",
-            default = "1.9",
+            default = "2.1",
             values = [
                 "1.1",
                 "1.2",
@@ -154,6 +155,7 @@ _kt_toolchain = rule(
                 "1.8",
                 "1.9",
                 "2.0",
+                "2.1",
             ],
         ),
         "debug": attr.string_list(
@@ -174,8 +176,8 @@ _kt_toolchain = rule(
             cfg = "target",
         ),
         "jvm_target": attr.string(
-            doc = "the -jvm_target flag. This is only tested at 1.8.",
-            default = "1.8",
+            doc = "the -jvm_target flag.",
+            default = "11",
             values = [
                 "1.6",
                 "1.8",