Introduce compiler option to dump declaration mapping.

compiler/cli/cli-common/src/org/jetbrains/kotlin/cli/common/arguments/K2JVMCompilerArguments.java

@@ -70,6 +70,10 @@ public class K2JVMCompilerArguments extends CommonCompilerArguments {
     @Argument(value = "Xskip-metadata-version-check", description = "Try loading binary incompatible classes, may cause crashes")
     public boolean skipMetadataVersionCheck;
 
+    @Argument(value = "Xdump-declarations-to", description = "Path to JSON file to dump Java to Kotlin declaration mappings")
+    @ValueDescription("<path>")
+    public String declarationsOutputPath;
+
     // Paths to output directories for friend modules.
     public String[] friendPaths;
 

compiler/cli/src/org/jetbrains/kotlin/cli/jvm/K2JVMCompiler.kt

@@ -279,6 +279,7 @@ open class K2JVMCompiler : CLICompiler<K2JVMCompilerArguments>() {
             configuration.put(JVMConfigurationKeys.DISABLE_PARAM_ASSERTIONS, arguments.noParamAssertions)
             configuration.put(JVMConfigurationKeys.DISABLE_INLINE, arguments.noInline)
             configuration.put(JVMConfigurationKeys.DISABLE_OPTIMIZATION, arguments.noOptimize)
+            configuration.put(JVMConfigurationKeys.DECLARATIONS_JSON_PATH, arguments.declarationsOutputPath)
             configuration.put(CLIConfigurationKeys.ALLOW_KOTLIN_PACKAGE, arguments.allowKotlinPackage);
             configuration.put(CLIConfigurationKeys.REPORT_PERF, arguments.reportPerf);
         }

compiler/cli/src/org/jetbrains/kotlin/cli/jvm/compiler/KotlinToJVMBytecodeCompiler.kt

@@ -399,7 +399,7 @@ object KotlinToJVMBytecodeCompiler {
                 outputDirectory,
                 incrementalCompilationComponents,
                 onIndependentPartCompilationEnd = onIndependentPartCompilationEnd,
-                dumpBinarySignatureMappingTo = outputDirectory?.resolve("binary-signatures.json") ?: createTempFile("binary-signatures", ".json"))
+                dumpBinarySignatureMappingTo = configuration.get(JVMConfigurationKeys.DECLARATIONS_JSON_PATH)?.let { File(it) })
         ProgressIndicatorAndCompilationCanceledStatus.checkCanceled()
 
         val generationStart = PerformanceCounter.currentTime()

compiler/cli/src/org/jetbrains/kotlin/cli/jvm/config/JVMConfigurationKeys.java

@@ -44,6 +44,8 @@ public class JVMConfigurationKeys {
 
     public static final CompilerConfigurationKey<String> MODULE_XML_FILE_PATH = CompilerConfigurationKey.create("path to module.xml");
 
+    public static final CompilerConfigurationKey<String> DECLARATIONS_JSON_PATH = CompilerConfigurationKey.create("path to declarations output");
+
     public static final CompilerConfigurationKey<List<Module>> MODULES =
             CompilerConfigurationKey.create("module data");