README.markdown

Hello World example for V8

It includes generic Rakefile for other projects

Usage

• Clone this gist
• Install + build V8: http://code.google.com/apis/v8/build.html
• Set V8 env variable to path of v8, e.g. V8=/Users/drnic/js/v8
• Run "rake" to build and run app

hello_world.cpp

#include <v8.h>

using namespace v8;

int main(int argc, char* argv[]) {

  // Create a stack-allocated handle scope.
  HandleScope handle_scope;

  // Create a new context.
  Handle<Context> context = Context::New();
  
  // Enter the created context for compiling and
  // running the hello world script.&nbsp;
  Context::Scope context_scope(context);

  // Create a string containing the JavaScript source code.
  Handle<String> source = String::New("'Hello' + ', World!'");

  // Compile the source code.
  Handle<Script> script = Script::Compile(source);
  
  // Run the script to get the result.
  Handle<Value> result = script->Run();

  // Convert the result to an ASCII string and print it.
  String::AsciiValue ascii(result);
  printf("%s\n", *ascii);
  return 0;
}

Rakefile

require "rubygems"
require "rake"
require "rake/clean"

PROG = "hello_world"
SRC  = FileList['**/*.cpp']
V8   = ENV['V8']

CLEAN.include(PROG)

task :default => [:build, :run]

task :build => [PROG]

task :run => [PROG] do
  sh "./#{PROG}" 
end

file PROG => SRC do
  sh "g++ -o #{PROG} #{SRC} -I#{V8}/include #{V8}/libv8.a -lpthread" 
end