Tenderlove Making

Writing Ruby C extensions: Part 1

Dec 18, 2009 @ 10:06 pm 
$ sudo gem install ZenTest hoe rake-compiler

$ sow stree

require "test/unit"
require "stree"

class TestStree < Test::Unit::TestCase
  def test_hello_world
    assert_equal 'hello world', Stree.hello_world
  end
end

$ tree
.
|-- CHANGELOG.rdoc
|-- Manifest.txt
|-- README.rdoc
|-- Rakefile
|-- ext
|   `-- stree
|-- lib
|   `-- stree.rb
`-- test
    `-- test_stree.rb

require 'rubygems'
require 'hoe'

Hoe.spec 'stree' do
  developer('Aaron Patterson', 'aaron@tenderlovemaking.com')
  self.readme_file   = 'README.rdoc'
  self.history_file  = 'CHANGELOG.rdoc'
  self.extra_rdoc_files  = FileList['*.rdoc']
  self.extra_dev_deps << ['rake-compiler', '>= 0']
  self.spec_extras = { :extensions => ["ext/stree/extconf.rb"] }

  Rake::ExtensionTask.new('stree', spec) do |ext|
    ext.lib_dir = File.join('lib', 'stree')
  end
end

Rake::Task[:test].prerequisites << :compile

require 'autotest/restart'

Autotest.add_hook :initialize do |at|
  at.add_mapping(/.*\.c/) do |f, _|
    at.files_matching(/test_.*rb$/)
  end
end

Autotest.add_hook :run_command do |at|
  system "rake clean compile"
end

rake aborted!
Don't know how to build task 'ext/stree/extconf.rb'

require 'mkmf'
create_makefile('stree/stree')

#include &lt;ruby.h&gt;
void Init_stree()
{
  VALUE mStree = rb_define_module("Stree");
  rb_define_singleton_method(mStree, "hello_world", hello_world, 0);
}

static VALUE hello_world(VALUE mod)
{
  return rb_str_new2("hello world");
}

#include &lt;ruby.h&gt;

static VALUE hello_world(VALUE klass)
{
  return rb_str_new2("hello world");
}

void Init_stree()
{
  VALUE mStree = rb_define_module("Stree");
  rb_define_singleton_method(mStree, "hello_world", hello_world, 0);
}

require 'stree/stree'

module Stree
  VERSION = '1.0.0'
end

$ tree -I tmp
.
|-- CHANGELOG.rdoc
|-- Manifest.txt
|-- README.rdoc
|-- Rakefile
|-- ext
|   `-- stree
|       |-- extconf.rb
|       `-- stree.c
|-- lib
|   |-- stree
|   |   `-- stree.bundle
|   `-- stree.rb
`-- test
    `-- test_stree.rb
« go back