Added attaching external annotations via command-line parameter.

compiler/cli/src/org/jetbrains/jet/cli/jvm/K2JVMCompiler.java

@@ -37,7 +37,6 @@ import org.jetbrains.jet.utils.PathUtil;
 
 import java.io.File;
 import java.io.PrintStream;
-import java.util.Collections;
 import java.util.List;
 
 import static org.jetbrains.jet.cli.common.ExitCode.*;
@@ -206,6 +205,12 @@ public class K2JVMCompiler extends CLICompiler<K2JVMCompilerArguments, K2JVMComp
             List<File> classpath = getClasspath(arguments);
             CompileEnvironmentUtil.addToClasspath(configuration.getEnvironment(), Iterables.toArray(classpath, File.class));
         }
+
+        if (arguments.annotations != null) {
+            for (String root : Splitter.on(File.pathSeparatorChar).split(arguments.annotations)) {
+                JetCoreEnvironment.addExternalAnnotationsRoot(PathUtil.jarFileOrDirectoryToVirtualFile(new File(root)));
+            }
+        }
     }
 
     @NotNull

compiler/cli/src/org/jetbrains/jet/cli/jvm/compiler/JetCoreEnvironment.java

@@ -103,6 +103,10 @@ public class JetCoreEnvironment extends JavaCoreEnvironment {
         JetStandardLibrary.initialize(getProject());
     }
 
+    public static void addExternalAnnotationsRoot(@NotNull VirtualFile root) {
+        ((CoreAnnotationsProvider) ExternalAnnotationsProvider.getInstance()).addExternalAnnotationsRoot(root);
+    }
+
     public MockApplication getApplication() {
         return myApplication;
     }