From 51eff62931b07b22eca642a870bf343d4c58ac5b Mon Sep 17 00:00:00 2001
From: Torsten Ruger <torsten@villataika.fi>
Date: Thu, 7 Feb 2019 11:07:57 +0200
Subject: [PATCH] Very basic cli to compile ruby files

Off course this is basically a cross compiler and the files
have to be transferred to an arm machine (and fixed as per note)
close #22
---
 bin/rubyxc                | 14 ++++++++++++++
 lib/rubyx/rubyxc.rb       | 33 +++++++++++++++++++++++++++++++++
 test/rubyx/test_rubyxc.rb | 21 +++++++++++++++++++++
 3 files changed, 68 insertions(+)
 create mode 100755 bin/rubyxc
 create mode 100644 lib/rubyx/rubyxc.rb
 create mode 100644 test/rubyx/test_rubyxc.rb

diff --git a/bin/rubyxc b/bin/rubyxc
new file mode 100755
index 00000000..6a99acf2
--- /dev/null
+++ b/bin/rubyxc
@@ -0,0 +1,14 @@
+#! /usr/bin/env ruby -I lib
+require 'rubygems'
+require 'bundler'
+begin
+  Bundler.setup(:default)
+rescue Bundler::BundlerError => e
+  $stderr.puts e.message
+  $stderr.puts "Run `bundle install` to install missing gems"
+  exit e.status_code
+end
+
+require "rubyx/rubyxc"
+
+RubyXC.start(ARGV)
diff --git a/lib/rubyx/rubyxc.rb b/lib/rubyx/rubyxc.rb
new file mode 100644
index 00000000..f0cecd08
--- /dev/null
+++ b/lib/rubyx/rubyxc.rb
@@ -0,0 +1,33 @@
+require "thor"
+require "rubyx"
+
+class RubyXC < Thor
+  desc "compile FILE" , "Compile given FILE to binary"
+  long_desc <<-LONGDESC
+      Very basic cli to compile ruby programs.
+      Currently only compile command supported without option.
+
+      Output will be elf object file of the same name, with .o, in root directory.
+
+      Note: Because of Bug #13, you need to run "ld -N file.o" on the file, before
+      executing it. This can be done on a mac by installing a cross linker
+      (brew install arm-linux-gnueabihf-binutils), or on the target arm machine.
+    LONGDESC
+
+  def compile(file)
+    begin
+      ruby = File.read(file)
+    rescue
+      fail MalformattedArgumentError , "No such file #{file}"
+    end
+    puts "compiling #{file}"
+
+    linker = ::RubyX::RubyXCompiler.new.ruby_to_binary( ruby , :arm )
+    writer = Elf::ObjectWriter.new(linker)
+
+    outfile = file.split("/").last.gsub(".rb" , ".o")
+    writer.save outfile
+
+    return outfile
+  end
+end
diff --git a/test/rubyx/test_rubyxc.rb b/test/rubyx/test_rubyxc.rb
new file mode 100644
index 00000000..414a903d
--- /dev/null
+++ b/test/rubyx/test_rubyxc.rb
@@ -0,0 +1,21 @@
+require_relative "helper"
+require "rubyx/rubyxc"
+
+module RubyX
+  class TestRubyXCli < MiniTest::Test
+
+    def test_invoke_without_not_work
+      assert_output(nil , /not find/) {RubyXC.start(["list"])}
+    end
+    def test_invoke_compile_works
+      assert_output( "") {RubyXC.start(["compile" ])}
+    end
+    def test_file_fail
+      assert_output(nil , /No such file/) {RubyXC.start(["compile" , "hi"])}
+    end
+    def test_file_open
+      assert_output(/compiling/) {RubyXC.start(["compile" , "test/mains/source/add__4.rb"])}
+      File.delete "add__4.o"
+    end
+  end
+end