[Gradle, JS] Use package.json candidate

^KT-39515 fixed

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/npm/NpmProject.kt

@@ -46,6 +46,9 @@ open class NpmProject(val compilation: KotlinJsCompilation) {
     val packageJsonFile: File
         get() = dir.resolve(PACKAGE_JSON)
 
+    val packageCandidateJsonFile: File
+        get() = dir.resolve(PACKAGE_CANDIDATE_JSON)
+
     val packageJsonTaskName: String
         get() = compilation.disambiguateName("packageJson")
 
@@ -140,6 +143,7 @@ open class NpmProject(val compilation: KotlinJsCompilation) {
 
     companion object {
         const val PACKAGE_JSON = "package.json"
+        const val PACKAGE_CANDIDATE_JSON = "package-candidate.json"
         const val NODE_MODULES = "node_modules"
         const val DIST_FOLDER = "kotlin"
     }

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/npm/PackageJsonUpToDateCheck.kt

@@ -24,7 +24,7 @@ class PackageJsonUpToDateCheck(val npmProject: NpmProject) {
         if (packageJsonHashFile.exists()) packageJsonHashFile.readText() else null
     }
 
-    private val packageJsonFile = npmProject.packageJsonFile
+    private val packageJsonFile = npmProject.packageCandidateJsonFile
 
     private val hash by lazy {
         val hasher = (project as ProjectInternal).services.get(FileHasher::class.java)

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/npm/resolver/KotlinCompilationNpmResolver.kt

@@ -352,7 +352,7 @@ internal class KotlinCompilationNpmResolver(
             }
 
             if (!skipWriting) {
-                packageJson.saveTo(npmProject.packageJsonFile)
+                packageJson.saveTo(npmProject.packageCandidateJsonFile)
             }
 
             return KotlinCompilationNpmResolution(

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/npm/tasks/KotlinPackageJsonTask.kt

@@ -47,7 +47,7 @@ open class KotlinPackageJsonTask : DefaultTask() {
 
     @get:OutputFile
     val packageJson: File
-        get() = compilationResolver.npmProject.packageJsonFile
+        get() = compilationResolver.npmProject.packageCandidateJsonFile
 
     @TaskAction
     fun resolve() {