jruby · Sep 8, 2015 · Sep 8, 2015
diff --git a/lib/ruby/truffle/truffle/etc.rb b/lib/ruby/truffle/truffle/etc.rb
@@ -0,0 +1,3 @@
+module Etc
+  include Truffle::Etc
+end
diff --git a/tool/truffle/jruby_truffle_runner/lib/jruby+truffle_runner.rb b/tool/truffle/jruby_truffle_runner/lib/jruby+truffle_runner.rb
@@ -61,6 +61,7 @@ class JRubyTruffleRunner
             debug:      ['-d', '--debug', 'JVM remote debugging', assign_new_value, false],
             require:    ['-r', '--require FILE', 'Files to require, same as Ruby\'s -r', add_to_array, []],
             load_path:  ['-I', '--load-path LOAD_PATH', 'Paths to add to load path, same as Ruby\'s -I', add_to_array, []],
+            executable: ['-e', '--executable NAME', 'finds and runs an executable of a gem', assign_new_value, nil],
             jexception: ['--jexception', 'print Java exceptions', assign_new_value, false]
         },
         clean:  {
@@ -286,6 +287,12 @@ def subcommand_run(rest)
       end
     end
 
+    executable = if @options[:run][:executable]
+                   executables = Dir.glob("#{@options[:global][:truffle_bundle_path]}/jruby+truffle/*/gems/*/{bin,exe}/*")
+                   executables.find { |path| File.basename(path) == @options[:run][:executable] } or
+                       raise "no executable with name '#{@options[:run][:executable]}' found"
+                 end
+
     core_load_path = "#{jruby_path}/truffle/src/main/ruby"
 
     cmd_options = [
@@ -303,6 +310,7 @@ def subcommand_run(rest)
     cmd = [(env unless env.empty?),
            @options[:global][:jruby_truffle_path],
            *cmd_options,
+           executable,
            *rest
     ].compact
 

diff --git a/truffle/src/main/java/org/jruby/truffle/nodes/ext/EtcNodes.java b/truffle/src/main/java/org/jruby/truffle/nodes/ext/EtcNodes.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2015 Oracle and/or its affiliates. All rights reserved. This
+ * code is released under a tri EPL/GPL/LGPL license. You can use it,
+ * redistribute it and/or modify it under the terms of the:
+ *
+ * Eclipse Public License version 1.0
+ * GNU General Public License version 2
+ * GNU Lesser General Public License version 2.1
+ */
+package org.jruby.truffle.nodes.ext;
+
+import com.oracle.truffle.api.CompilerDirectives.TruffleBoundary;
+import com.oracle.truffle.api.dsl.Specialization;
+import com.oracle.truffle.api.source.SourceSection;
+import org.jruby.truffle.nodes.core.CoreClass;
+import org.jruby.truffle.nodes.core.CoreMethod;
+import org.jruby.truffle.nodes.core.CoreMethodNode;
+import org.jruby.truffle.runtime.RubyContext;
+
+@CoreClass(name = "Truffle::Etc")
+public abstract class EtcNodes {
+
+    @CoreMethod(names = "nprocessors", needsSelf = false)
+    public abstract static class NProcessors extends CoreMethodNode {
+
+        public NProcessors(RubyContext context, SourceSection sourceSection) {
+            super(context, sourceSection);
+        }
+
+        @TruffleBoundary
+        @Specialization
+        public int nprocessors() {
+            return Runtime.getRuntime().availableProcessors();
+        }
+
+    }
+
+}
diff --git a/truffle/src/main/java/org/jruby/truffle/runtime/core/CoreLibrary.java b/truffle/src/main/java/org/jruby/truffle/runtime/core/CoreLibrary.java
@@ -39,14 +39,14 @@
 import org.jruby.truffle.nodes.ext.BigDecimalNodesFactory;
 import org.jruby.truffle.nodes.ext.DigestNodesFactory;
 import org.jruby.truffle.nodes.ext.ZlibNodesFactory;
+import org.jruby.truffle.nodes.ext.EtcNodesFactory;
 import org.jruby.truffle.nodes.objects.FreezeNode;
 import org.jruby.truffle.nodes.objects.FreezeNodeGen;
 import org.jruby.truffle.nodes.objects.SingletonClassNode;
 import org.jruby.truffle.nodes.objects.SingletonClassNodeGen;
 import org.jruby.truffle.nodes.rubinius.ByteArrayNodesFactory;
 import org.jruby.truffle.nodes.rubinius.PosixNodesFactory;
 import org.jruby.truffle.nodes.rubinius.RubiniusTypeNodesFactory;
-import org.jruby.truffle.runtime.Options;
 import org.jruby.truffle.runtime.RubyCallStack;
 import org.jruby.truffle.runtime.RubyContext;
 import org.jruby.truffle.runtime.backtrace.BacktraceFormatter;
@@ -432,6 +432,7 @@ public CoreLibrary(RubyContext context) {
         defineModule(truffleModule, "Primitive");
         defineModule(truffleModule, "Digest");
         defineModule(truffleModule, "Zlib");
+        defineModule(truffleModule, "Etc");
         bigDecimalClass = defineClass(truffleModule, numericClass, "BigDecimal");
         Layouts.CLASS.setInstanceFactoryUnsafe(bigDecimalClass, Layouts.BIG_DECIMAL.createBigDecimalShape(bigDecimalClass, bigDecimalClass));
 
@@ -551,6 +552,7 @@ private void addCoreMethods() {
         coreMethodNodeManager.addCoreMethodNodes(DigestNodesFactory.getFactories());
         coreMethodNodeManager.addCoreMethodNodes(BigDecimalNodesFactory.getFactories());
         coreMethodNodeManager.addCoreMethodNodes(ZlibNodesFactory.getFactories());
+        coreMethodNodeManager.addCoreMethodNodes(EtcNodesFactory.getFactories());
         coreMethodNodeManager.allMethodInstalled();
 
         basicObjectSendMethod = Layouts.MODULE.getFields(basicObjectClass).getMethods().get("__send__");