KT-50033 Add missing public API packages to module-info and setup a test

The test checks that new packages are not accidentally non-exported,
so each new stdlib package must be either exported or specified in that
test's expected non-exported package list.

compiler/tests/org/jetbrains/kotlin/code/CodeConformanceTest.kt

@@ -46,6 +46,7 @@ class CodeConformanceTest : TestCase() {
                 "libraries/kotlin.test/js/it/node_modules",
                 "libraries/reflect/api/src/java9/java/kotlin/reflect/jvm/internal/impl",
                 "libraries/reflect/build",
+                "libraries/stdlib/jdk8/moduleTest/NonExportedPackagesTest.kt",
                 "libraries/stdlib/js-ir/.gradle",
                 "libraries/stdlib/js-ir/build",
                 "libraries/stdlib/js-ir-minimal-for-test/.gradle",

libraries/stdlib/jdk8/build.gradle

@@ -34,6 +34,19 @@ sourceSets {
             srcDir 'java9'
         }
     }
+    moduleTest {
+        java {
+            srcDir 'moduleTest'
+        }
+    }
+}
+
+dependencies {
+    moduleTestApi project(':kotlin-stdlib')
+    moduleTestApi project(':kotlin-stdlib-jdk7')
+    moduleTestCompileOnly project
+    moduleTestApi project(':kotlin-test:kotlin-test-junit')
+    moduleTestApi "org.ow2.asm:asm:9.0"
 }
 
 jar {
@@ -94,11 +107,23 @@ task testJdk6Tests(type: Test) { thisTask ->
 }
 
 [JdkMajorVersion.JDK_9, JdkMajorVersion.JDK_10, JdkMajorVersion.JDK_11].forEach { jvmVersion ->
-    tasks.register("jdk${jvmVersion.majorVersion}Test", Test) { thisTask ->
-        check.dependsOn(thisTask)
+    check.dependsOn(tasks.register("jdk${jvmVersion.majorVersion}Test", Test) { thisTask ->
         group = "verification"
-        thisTask.javaLauncher.set(
-                JvmToolchain.getToolchainLauncherFor(project, jvmVersion)
-        )
-    }
+        thisTask.javaLauncher.set(JvmToolchain.getToolchainLauncherFor(project, jvmVersion))
+    })
 }
+
+compileModuleTestKotlin {
+    kotlinJavaToolchain.toolchain.use(JvmToolchain.getToolchainLauncherFor(project, JdkMajorVersion.JDK_9))
+}
+
+check.dependsOn(tasks.register("moduleInfoTest", Test) {test ->
+    test.dependsOn(moduleTestClasses)
+    test.group = "verification"
+    test.testClassesDirs = sourceSets.moduleTest.output.classesDirs
+    test.classpath = files(sourceSets.moduleTest.runtimeClasspath, tasks.jar)
+    test.javaLauncher.set(JvmToolchain.getToolchainLauncherFor(project, JdkMajorVersion.JDK_9))
+    doFirst {
+        test.systemProperty("stdlibJars", test.classpath.filter { it.name.contains('kotlin-stdlib') }.join(File.pathSeparator))
+    }
+})

libraries/stdlib/jdk8/java9/module-info.java

@@ -3,9 +3,11 @@ module kotlin.stdlib.jdk8 {
     requires transitive kotlin.stdlib;
     requires kotlin.stdlib.jdk7;
 
+    exports kotlin.jvm.jdk8;
     exports kotlin.collections.jdk8;
     exports kotlin.streams.jdk8;
     exports kotlin.text.jdk8;
+    exports kotlin.time.jdk8;
 
     opens kotlin.internal.jdk8 to kotlin.stdlib;
 }

libraries/stdlib/jdk8/moduleTest/NonExportedPackagesTest.kt

@@ -0,0 +1,82 @@
+/*
+ * Copyright 2010-2021 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 test.jdk9
+
+import org.objectweb.asm.*
+import java.io.File
+import java.lang.module.ModuleDescriptor
+import java.util.jar.JarFile
+import kotlin.test.*
+
+class NonExportedPackagesTest {
+
+    @Test
+    fun stdlib() {
+        checkNonExportedPackages("kotlin-stdlib", setOf(
+            "kotlin.collections.builders",
+            "kotlin.js",
+            "kotlin.jvm.internal.unsafe",
+        ))
+    }
+
+    @Test
+    fun stdlibJdk7() {
+        checkNonExportedPackages("kotlin-stdlib-jdk7", setOf(
+            "kotlin.internal.jdk7",
+        ))
+    }
+
+    @Test
+    fun stdlibJdk8() {
+        checkNonExportedPackages("kotlin-stdlib-jdk8", setOf(
+            "kotlin.internal.jdk8",
+            "kotlin.random.jdk8",
+        ))
+    }
+
+    private fun checkNonExportedPackages(jarShortName: String, expectedPackages: Set<String>) {
+        val file = findJar(jarShortName)
+        JarFile(file).use { jar ->
+            val moduleInfoEntry = jar.getJarEntry("META-INF/versions/9/module-info.class") ?: error("module-info is not found in $file")
+            val descriptor = jar.getInputStream(moduleInfoEntry).use { infoStream -> ModuleDescriptor.read(infoStream) }
+            val packages = mutableSetOf<String>()
+
+            for (entry in jar.entries()) {
+                if (entry.isDirectory) continue
+                val name = entry.name
+                if (name == moduleInfoEntry.name) continue
+                if (name.endsWith(".class", ignoreCase = true) &&
+                    (!name.startsWith("META-INF", ignoreCase = true)) ||
+                    name.startsWith("META-INF/versions", ignoreCase = true)
+                ) {
+                    jar.getInputStream(entry).use { classStream ->
+                        val visitor = ClassFqnVisitor()
+                        ClassReader(classStream).accept(visitor, ClassReader.SKIP_CODE)
+                        visitor.fqname?.run { substringBeforeLast('/').replace('/', '.') }?.let(packages::add)
+                    }
+                }
+            }
+
+            val nonExported = packages - descriptor.exports().filter { it.targets().isEmpty() }.map { it.source() }
+            assertEquals(expectedPackages, nonExported)
+        }
+    }
+
+
+
+    private fun findJar(shortName: String): File {
+        val jars = System.getProperty("stdlibJars").split(File.pathSeparator)
+        return jars.map(::File).single { it.name.matches(Regex("""${Regex.escape(shortName)}(?!-[a-z]).+\.jar""")) }
+    }
+
+    private class ClassFqnVisitor : ClassVisitor(Opcodes.ASM9) {
+        var fqname: String? = null
+
+        override fun visit(version: Int, access: Int, name: String?, signature: String?, superName: String?, interfaces: Array<out String>?) {
+            super.visit(version, access, name, signature, superName, interfaces)
+            fqname = name
+        }
+    }
+}

libraries/stdlib/jvm/java9/module-info.java

@@ -8,6 +8,7 @@ module kotlin.stdlib {
     exports kotlin.concurrent;
     exports kotlin.contracts;
     exports kotlin.coroutines;
+    exports kotlin.coroutines.cancellation;
     exports kotlin.coroutines.intrinsics;
     exports kotlin.coroutines.jvm.internal;
     exports kotlin.io;