developer option to exclude sources

to compile stdlib

build.xml

@@ -35,6 +35,7 @@
         <mkdir dir="${output}/classes/stdlib"/>
         <java classname="org.jetbrains.jet.cli.KotlinCompiler">
             <classpath refid="classpath.kotlin"/>
+            <arg value="-excludeStdlib"/>
             <arg value="-src"/>
             <arg value="${basedir}/stdlib/ktSrc"/>
             <arg value="-output"/>

compiler/backend/src/org/jetbrains/jet/compiler/CompileEnvironment.java

@@ -337,10 +337,12 @@ public class CompileEnvironment {
         }
     }
 
-    public boolean compileBunchOfSources(String sourceFileOrDir, String jar, String outputDir, boolean includeRuntime) {
+    public boolean compileBunchOfSources(String sourceFileOrDir, String jar, String outputDir, boolean includeRuntime, boolean includeSources) {
         CompileSession session = new CompileSession(myEnvironment);
         session.addSources(sourceFileOrDir);
-        session.addStdLibSources(false);
+        if (includeSources) {
+            session.addStdLibSources(false);
+        }
 
         String mainClass = null;
         for (JetFile file : session.getSourceFileNamespaces()) {

compiler/cli/src/org/jetbrains/jet/cli/KotlinCompiler.java

@@ -25,6 +25,8 @@ public class KotlinCompiler {
         public String module;
         @Argument(value = "includeRuntime", description = "include Kotlin runtime in to resulting jar")
         public boolean includeRuntime;
+        @Argument(value = "excludeStdlib", description = "do not load stdlib (to compile stdlib itself)")
+        public boolean excludeStdlib;
     }
 
     public static void main(String[] args) {
@@ -59,7 +61,7 @@ public class KotlinCompiler {
                 return;
             }
             else {
-                if (!environment.compileBunchOfSources(arguments.src, arguments.jar, arguments.outputDir, arguments.includeRuntime)) {
+                if (!environment.compileBunchOfSources(arguments.src, arguments.jar, arguments.outputDir, arguments.includeRuntime, !arguments.excludeStdlib)) {
                     System.exit(1);
                     return;
                 }