[Sourcemap] Extract addLink from SourceMap3Builder as a addSourceMappingURL

The general goal is remove dependency on TextOutput and
make it simpler to use for wasm backend.

js/js.dce/src/org/jetbrains/kotlin/js/dce/DeadCodeElimination.kt

@@ -23,6 +23,7 @@ import org.jetbrains.kotlin.js.parser.sourcemaps.SourceMapParser
 import org.jetbrains.kotlin.js.parser.sourcemaps.SourceMapSuccess
 import org.jetbrains.kotlin.js.sourceMap.SourceFilePathResolver
 import org.jetbrains.kotlin.js.sourceMap.SourceMap3Builder
+import org.jetbrains.kotlin.js.sourceMap.addSourceMappingURL
 import org.jetbrains.kotlin.js.util.TextOutputImpl
 import java.io.File
 import java.io.InputStreamReader
@@ -115,18 +116,19 @@ class DeadCodeElimination(
             for ((file, block) in inputFiles.zip(blocks)) {
                 val sourceMapFile = File(file.outputPath + ".map")
                 val textOutput = TextOutputImpl()
-                val sourceMapBuilder = SourceMap3Builder(File(file.outputPath), textOutput, "")
+                val outputFile = File(file.outputPath)
+                val sourceMapBuilder = SourceMap3Builder(outputFile, textOutput, "")
 
                 val inputFile = File(file.resource.name)
                 val sourceBaseDir = if (inputFile.exists()) inputFile.parentFile else File(".")
 
-                val sourcePathResolver = SourceFilePathResolver(emptyList(), File(file.outputPath).parentFile)
+                val sourcePathResolver = SourceFilePathResolver(emptyList(), outputFile.parentFile)
                 val consumer = SourceMapBuilderConsumer(sourceBaseDir, sourceMapBuilder, sourcePathResolver, true, true)
                 block.accept(JsToStringGenerationVisitor(textOutput, consumer))
                 val sourceMapContent = sourceMapBuilder.build()
-                sourceMapBuilder.addLink()
+                textOutput.addSourceMappingURL(outputFile)
 
-                with(File(file.outputPath)) {
+                with(outputFile) {
                     parentFile.mkdirs()
                     writeText(textOutput.toString())
                 }

js/js.sourcemap/src/org/jetbrains/kotlin/js/sourceMap/SourceMap3Builder.kt

@@ -6,7 +6,6 @@ package org.jetbrains.kotlin.js.sourceMap
 
 import gnu.trove.TObjectIntHashMap
 import org.jetbrains.kotlin.js.parser.sourcemaps.*
-import org.jetbrains.kotlin.js.util.TextOutput
 import java.io.File
 import java.io.IOException
 import java.io.Reader
@@ -192,12 +191,6 @@ class SourceMap3Builder(
         }
     }
 
-    override fun addLink() {
-        textOutput.print("\n//# sourceMappingURL=")
-        textOutput.print(generatedFile!!.name)
-        textOutput.print(".map\n")
-    }
-
     private object Base64VLQ {
         // A Base64 VLQ digit can represent 5 bits, so it is base-32.
         private const val VLQ_BASE_SHIFT = 5

js/js.sourcemap/src/org/jetbrains/kotlin/js/sourceMap/SourceMapBuilder.java

@@ -10,8 +10,6 @@ import java.io.File;
 public interface SourceMapBuilder extends SourceMapMappingConsumer {
     void skipLinesAtBeginning(int count);
 
-    void addLink();
-
     File getOutFile();
 
     String build();

js/js.sourcemap/src/org/jetbrains/kotlin/js/sourceMap/utils.kt

@@ -0,0 +1,15 @@
+/*
+ * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.js.sourceMap
+
+import org.jetbrains.kotlin.js.util.TextOutput
+import java.io.File
+
+fun TextOutput.addSourceMappingURL(outputJsFile: File) {
+    print("\n//# sourceMappingURL=")
+    print(outputJsFile.name)
+    print(".map\n")
+}

js/js.translator/src/org/jetbrains/kotlin/js/facade/TranslationResult.kt

@@ -21,6 +21,7 @@ import org.jetbrains.kotlin.js.config.SourceMapSourceEmbedding
 import org.jetbrains.kotlin.js.sourceMap.SourceFilePathResolver
 import org.jetbrains.kotlin.js.sourceMap.SourceMap3Builder
 import org.jetbrains.kotlin.js.sourceMap.SourceMapBuilderConsumer
+import org.jetbrains.kotlin.js.sourceMap.addSourceMappingURL
 import org.jetbrains.kotlin.js.util.TextOutput
 import org.jetbrains.kotlin.js.util.TextOutputImpl
 import org.jetbrains.kotlin.name.FqName
@@ -134,7 +135,7 @@ abstract class TranslationResult protected constructor(val diagnostics: Diagnost
 
             getCode(output, sourceMapBuilderConsumer)
             if (sourceMapBuilderConsumer != null) {
-                sourceMapBuilder.addLink()
+                output.addSourceMappingURL(outputFile)
             }
             val code = output.toString()
 
@@ -150,7 +151,7 @@ abstract class TranslationResult protected constructor(val diagnostics: Diagnost
                 sourceMapBuilder.skipLinesAtBeginning(StringUtil.getLineBreakCount(prefix))
                 val sourceMapFile = SimpleOutputFile(sourceFiles, sourceMapBuilder.outFile.name, sourceMapBuilder.build())
                 outputFiles.add(sourceMapFile)
-                sourceMapBuilder.addLink()
+                output.addSourceMappingURL(outputFile)
             }
 
             return SimpleOutputFileCollection(outputFiles)