samples: Blacklist some xcode environment variables

This patch unsets some Xcode environment variables in gradle
plugin and command line runner.

build.gradle

@@ -191,6 +191,10 @@ task distCompiler(type: Copy) {
         into('tools')
     }
 
+    from(project(':utilities').file('env_blacklist')) {
+        into('tools')
+    }
+
     from(project(':utilities').file('build/libs')) {
         into('konan/lib')
     }

cmd/run_konan

@@ -74,6 +74,11 @@ java_opts=(-ea \
             "-Dkonan.home=${KONAN_HOME}" \
            -Dfile.encoding=UTF-8)
 
+# Unset some environment variables which are set by XCode and may potentially affect the tool executed.
+for VAR in `cat "${KONAN_HOME}/tools/env_blacklist"`; do
+    unset $VAR
+done
+
 KONAN_JAR="${KONAN_HOME}/konan/lib/backend.native.jar"
 KOTLIN_JAR="${KONAN_HOME}/konan/lib/kotlin-compiler.jar"
 STUB_GENERATOR_JAR="${KONAN_HOME}/konan/lib/StubGenerator.jar"

tools/kotlin-native-gradle-plugin/build.gradle

@@ -103,6 +103,7 @@ jar {
 
 processResources {
     expand('konanVersion': konanVersion)
+    from(rootProject.project(':utilities').file('env_blacklist'))
 }
 
 publishing {

tools/kotlin-native-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/KonanToolRunner.kt

@@ -19,6 +19,13 @@ internal abstract class KonanCliRunner(val toolName: String, val fullName: Strin
 
     override fun getName() = toolName
 
+    // We need to unset some environment variables which are set by XCode and may potentially affect the tool executed.
+    protected val blacklistEnvironment: List<String> by lazy {
+        KonanPlugin::class.java.getResourceAsStream("/env_blacklist")?.let { stream ->
+            stream.reader().use { it.readLines() }
+        } ?: emptyList<String>()
+    }
+
     override val classpath: FileCollection =
             project.fileTree("${project.konanHome}/konan/lib/")
             .apply { include("*.jar")  }
@@ -39,12 +46,13 @@ internal abstract class KonanCliRunner(val toolName: String, val fullName: Strin
                     "Please change it to the compiler root directory and rerun the build.")
         }
 
-        project.javaexec {
-            it.main = mainClass
-            it.classpath = classpath
-            it.jvmArgs(jvmArgs)
-            it.args(listOf(toolName) + args)
-            it.environment(environment)
+        project.javaexec { spec ->
+            spec.main = mainClass
+            spec.classpath = classpath
+            spec.jvmArgs(jvmArgs)
+            spec.args(listOf(toolName) + args)
+            blacklistEnvironment.forEach { spec.environment.remove(it) }
+            spec.environment(environment)
         }
     }
 }

utilities/env_blacklist

@@ -0,0 +1,107 @@
+ADDITIONAL_SDKS
+APPLICATION_EXTENSION_API_ONLY
+ARCHS
+ARCHS_STANDARD
+ARCHS_STANDARD_32_64_BIT
+ARCHS_STANDARD_32_BIT
+ARCHS_STANDARD_64_BIT
+ARCHS_STANDARD_INCLUDING_64_BIT
+ARCHS_UNIVERSAL_IPHONE_OS
+CLANG_ANALYZER_NONNULL
+CLANG_ANALYZER_NUMBER_OBJECT_CONVERSION
+CLANG_CXX_LANGUAGE_STANDARD
+CLANG_CXX_LIBRARY
+CLANG_ENABLE_MODULES
+CLANG_ENABLE_OBJC_ARC
+CLANG_MODULES_BUILD_SESSION_FILE
+CLANG_WARN_BOOL_CONVERSION
+CLANG_WARN_CONSTANT_CONVERSION
+CLANG_WARN_DIRECT_OBJC_ISA_USAGE
+CLANG_WARN_DOCUMENTATION_COMMENTS
+CLANG_WARN_EMPTY_BODY
+CLANG_WARN_ENUM_CONVERSION
+CLANG_WARN_INFINITE_RECURSION
+CLANG_WARN_INT_CONVERSION
+CLANG_WARN_OBJC_ROOT_CLASS
+CLANG_WARN_SUSPICIOUS_MOVE
+CLANG_WARN_UNREACHABLE_CODE
+CLANG_WARN__DUPLICATE_METHOD_MATCH
+CURRENT_ARCH
+DEVELOPER_APPLICATIONS_DIR
+DEVELOPER_BIN_DIR
+DEVELOPER_DIR
+DEVELOPER_FRAMEWORKS_DIR
+DEVELOPER_FRAMEWORKS_DIR_QUOTED
+DEVELOPER_LIBRARY_DIR
+DEVELOPER_SDK_DIR
+DEVELOPER_TOOLS_DIR
+DEVELOPER_USR_DIR
+DT_TOOLCHAIN_DIR
+ENABLE_BITCODE
+ENABLE_DEFAULT_HEADER_SEARCH_PATHS
+ENABLE_STRICT_OBJC_MSGSEND
+FRAMEWORK_SEARCH_PATHS
+GENERATE_MASTER_OBJECT_FILE
+GENERATE_PROFILING_CODE
+HEADER_SEARCH_PATHS
+INLINE_PRIVATE_FRAMEWORKS
+KEEP_PRIVATE_EXTERNS
+LD_NO_PIE
+LD_RUNPATH_SEARCH_PATHS
+LINK_WITH_STANDARD_LIBRARIES
+MACH_O_TYPE
+NATIVE_ARCH
+NATIVE_ARCH_32_BIT
+NATIVE_ARCH_64_BIT
+NATIVE_ARCH_ACTUAL
+NO_COMMON
+ONLY_ACTIVE_ARCH
+PATH_PREFIXES_EXCLUDED_FROM_HEADER_DEPENDENCIES
+PLATFORM_DEVELOPER_APPLICATIONS_DIR
+PLATFORM_DEVELOPER_BIN_DIR
+PLATFORM_DEVELOPER_LIBRARY_DIR
+PLATFORM_DEVELOPER_SDK_DIR
+PLATFORM_DEVELOPER_TOOLS_DIR
+PLATFORM_DEVELOPER_USR_DIR
+PLATFORM_DIR
+SDKROOT
+SDK_DIR
+SDK_DIR_iphoneos11_0
+SDK_NAME
+SDK_NAMES
+SDK_PRODUCT_BUILD_VERSION
+SDK_VERSION
+SDK_VERSION_ACTUAL
+SDK_VERSION_MAJOR
+SDK_VERSION_MINOR
+SHARED_DERIVED_FILE_DIR
+SHARED_FRAMEWORKS_FOLDER_PATH
+SHARED_PRECOMPS_DIR
+SHARED_SUPPORT_FOLDER_PATH
+SYSTEM_ADMIN_APPS_DIR
+SYSTEM_APPS_DIR
+SYSTEM_CORE_SERVICES_DIR
+SYSTEM_DEMOS_DIR
+SYSTEM_DEVELOPER_APPS_DIR
+SYSTEM_DEVELOPER_BIN_DIR
+SYSTEM_DEVELOPER_DEMOS_DIR
+SYSTEM_DEVELOPER_DIR
+SYSTEM_DEVELOPER_DOC_DIR
+SYSTEM_DEVELOPER_GRAPHICS_TOOLS_DIR
+SYSTEM_DEVELOPER_JAVA_TOOLS_DIR
+SYSTEM_DEVELOPER_PERFORMANCE_TOOLS_DIR
+SYSTEM_DEVELOPER_RELEASENOTES_DIR
+SYSTEM_DEVELOPER_TOOLS
+SYSTEM_DEVELOPER_TOOLS_DOC_DIR
+SYSTEM_DEVELOPER_TOOLS_RELEASENOTES_DIR
+SYSTEM_DEVELOPER_USR_DIR
+SYSTEM_DEVELOPER_UTILITIES_DIR
+SYSTEM_DOCUMENTATION_DIR
+SYSTEM_KEXT_INSTALL_PATH
+SYSTEM_LIBRARY_DIR
+TOOLCHAINS
+TOOLCHAIN_DIR
+USE_DYNAMIC_NO_PIC
+USE_HEADERMAP
+VALID_ARCHS
+XCODE_APP_SUPPORT_DIR