From f62e9e79822141ebddf283bc08f72cf5f33cb8b8 Mon Sep 17 00:00:00 2001
From: Yuki Yugui Sonoda <yugui@yugui.jp>
Date: Thu, 3 Sep 2015 23:08:53 +0900
Subject: [PATCH] add initial implementation of ext library

---
 Rakefile               | 16 +++++++++++++++-
 ext/jsonnet/.gitignore |  2 ++
 ext/jsonnet/extconf.rb |  6 ++++++
 ext/jsonnet/jsonnet.c  | 16 ++++++++++++++++
 lib/jsonnet.rb         |  1 +
 test/test_jsonnet.rb   |  8 ++++++++
 6 files changed, 48 insertions(+), 1 deletion(-)
 create mode 100644 ext/jsonnet/.gitignore
 create mode 100644 ext/jsonnet/extconf.rb
 create mode 100644 ext/jsonnet/jsonnet.c
 create mode 100644 test/test_jsonnet.rb

diff --git a/Rakefile b/Rakefile
index 809eb56..4b0b16d 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,2 +1,16 @@
-require "bundler/gem_tasks"
+require 'bundler/gem_tasks'
+require "rake/extensiontask"
+require 'rake/testtask'
 
+task :default => :compile
+
+Rake::ExtensionTask.new do |t|
+  t.name = 'jsonnet_wrap'
+  t.ext_dir = 'ext/jsonnet'
+  t.lib_dir = 'lib/jsonnet'
+end
+
+Rake::TestTask.new('test' => 'compile') do |t|
+  t.libs << 'test'
+  t.verbose = true
+end
diff --git a/ext/jsonnet/.gitignore b/ext/jsonnet/.gitignore
new file mode 100644
index 0000000..cc00087
--- /dev/null
+++ b/ext/jsonnet/.gitignore
@@ -0,0 +1,2 @@
+Makefile
+*.o
diff --git a/ext/jsonnet/extconf.rb b/ext/jsonnet/extconf.rb
new file mode 100644
index 0000000..97df2d0
--- /dev/null
+++ b/ext/jsonnet/extconf.rb
@@ -0,0 +1,6 @@
+require 'mkmf'
+
+dir_config('jsonnet')
+abort 'libjsonnet.h not found' unless have_header('libjsonnet.h')
+abort 'libjsonnet not found' unless have_library('jsonnet')
+create_makefile('jsonnet_wrap')
diff --git a/ext/jsonnet/jsonnet.c b/ext/jsonnet/jsonnet.c
new file mode 100644
index 0000000..db2f77b
--- /dev/null
+++ b/ext/jsonnet/jsonnet.c
@@ -0,0 +1,16 @@
+#include <ruby/ruby.h>
+#include <libjsonnet.h>
+
+static VALUE cVM;
+
+static VALUE
+jsonnet_s_version(VALUE mod) {
+    return rb_usascii_str_new_cstr(jsonnet_version());
+}
+
+void
+Init_jsonnet_wrap(void) {
+    VALUE mJsonnet = rb_define_module("Jsonnet");
+    rb_define_singleton_method(mJsonnet, "libversion", jsonnet_s_version, 0);
+    cVM = rb_define_class_under(mJsonnet, "VM", rb_cData);
+}
diff --git a/lib/jsonnet.rb b/lib/jsonnet.rb
index be1321b..98a4d78 100644
--- a/lib/jsonnet.rb
+++ b/lib/jsonnet.rb
@@ -1,4 +1,5 @@
 require "jsonnet/version"
+require "jsonnet/jsonnet_wrap"
 
 module Jsonnet
   # Your code goes here...
diff --git a/test/test_jsonnet.rb b/test/test_jsonnet.rb
new file mode 100644
index 0000000..99810ef
--- /dev/null
+++ b/test/test_jsonnet.rb
@@ -0,0 +1,8 @@
+require 'jsonnet'
+require 'test/unit'
+
+class TestJsonnet < Test::Unit::TestCase
+  test 'libversion returns a String' do
+    assert_kind_of String, Jsonnet.libversion 
+  end
+end