From a43dd799e4a2a0ed7f75ca604e7c3a66bf216d2b Mon Sep 17 00:00:00 2001
From: Alex Kotov <kotovalexarian@gmail.com>
Date: Tue, 18 Jan 2022 18:03:19 +0500
Subject: [PATCH] Add Ruby native extension "libkernaux"

---
 pkgs/ruby/.gitignore                | 1 +
 pkgs/ruby/Rakefile                  | 9 +++++++++
 pkgs/ruby/ext/libkernaux/extconf.rb | 5 +++++
 pkgs/ruby/ext/libkernaux/main.c     | 5 +++++
 pkgs/ruby/kernaux.gemspec           | 9 ++++++---
 pkgs/ruby/lib/kernaux.rb            | 3 +++
 6 files changed, 29 insertions(+), 3 deletions(-)
 create mode 100644 pkgs/ruby/ext/libkernaux/extconf.rb
 create mode 100644 pkgs/ruby/ext/libkernaux/main.c

diff --git a/pkgs/ruby/.gitignore b/pkgs/ruby/.gitignore
index c1a6109..4834e46 100644
--- a/pkgs/ruby/.gitignore
+++ b/pkgs/ruby/.gitignore
@@ -1,5 +1,6 @@
 *.gem
 *.rbc
+*.so
 
 /.byebug_history
 /.config/
diff --git a/pkgs/ruby/Rakefile b/pkgs/ruby/Rakefile
index a785c63..1f91522 100644
--- a/pkgs/ruby/Rakefile
+++ b/pkgs/ruby/Rakefile
@@ -52,6 +52,15 @@ rescue LoadError
   nil
 end
 
+begin
+  require 'rake/extensiontask'
+  Rake::ExtensionTask.new 'libkernaux' do |ext|
+    ext.lib_dir = 'lib/kernaux'
+  end
+rescue LoadError
+  nil
+end
+
 desc 'Open development console'
 task :console do
   sh 'bundle', 'exec', File.expand_path(File.join('bin', 'console'), __dir__)
diff --git a/pkgs/ruby/ext/libkernaux/extconf.rb b/pkgs/ruby/ext/libkernaux/extconf.rb
new file mode 100644
index 0000000..5e0553a
--- /dev/null
+++ b/pkgs/ruby/ext/libkernaux/extconf.rb
@@ -0,0 +1,5 @@
+# frozen_string_literal: true
+
+require 'mkmf'
+
+create_makefile 'kernaux/libkernaux'
diff --git a/pkgs/ruby/ext/libkernaux/main.c b/pkgs/ruby/ext/libkernaux/main.c
new file mode 100644
index 0000000..96fddbd
--- /dev/null
+++ b/pkgs/ruby/ext/libkernaux/main.c
@@ -0,0 +1,5 @@
+#include <ruby.h>
+
+void Init_libkernaux()
+{
+}
diff --git a/pkgs/ruby/kernaux.gemspec b/pkgs/ruby/kernaux.gemspec
index a9e184a..bfda8a2 100644
--- a/pkgs/ruby/kernaux.gemspec
+++ b/pkgs/ruby/kernaux.gemspec
@@ -37,9 +37,12 @@ Gem::Specification.new do |spec|
 
   spec.executables = spec.files.grep(%r{\Aexe/}) { |f| File.basename f }
 
-  spec.add_development_dependency 'bundler', '~> 2.2'
-  spec.add_development_dependency 'pry',     '~> 0.14'
-  spec.add_development_dependency 'rake',    '~> 13.0'
+  spec.extensions << 'ext/libkernaux/extconf.rb'
+
+  spec.add_development_dependency 'bundler',             '~> 2.2'
+  spec.add_development_dependency 'pry',                 '~> 0.14'
+  spec.add_development_dependency 'rake',                '~> 13.0'
+  spec.add_development_dependency 'rake-compiler',       '~> 1.1'
   spec.add_development_dependency 'rspec',               '~> 3.10'
   spec.add_development_dependency 'rubocop',             '~> 1.25'
   spec.add_development_dependency 'rubocop-performance', '~> 1.13'
diff --git a/pkgs/ruby/lib/kernaux.rb b/pkgs/ruby/lib/kernaux.rb
index 05f48de..3542c09 100644
--- a/pkgs/ruby/lib/kernaux.rb
+++ b/pkgs/ruby/lib/kernaux.rb
@@ -7,3 +7,6 @@ require_relative 'kernaux/version'
 #
 module KernAux
 end
+
+# Native extension
+require_relative 'kernaux/libkernaux'