From b90bb19a0d496e27c16170eb4149e9ffe28a4659 Mon Sep 17 00:00:00 2001
From: Watson <watson1978@gmail.com>
Date: Thu, 25 Apr 2013 22:23:19 +0900
Subject: [PATCH] change the build directory for outside files of project

This changing will introduce:

1. When run 'rake clean', the object files of gem is not removed. To reduce the time when rebuild the project.
2. Across multiple projects that use the same gem, this changing will share the object files.
3. When update RubyMotion with 'motion update', it will remove the object files to clean up disk space.
---
 lib/motion/project/builder.rb      | 27 ++++++++++++++++++++++-----
 lib/motion/project/xcode_config.rb | 18 ++++++++++--------
 2 files changed, 32 insertions(+), 13 deletions(-)

diff --git a/lib/motion/project/builder.rb b/lib/motion/project/builder.rb
index 255eaf72..34095b19 100644
--- a/lib/motion/project/builder.rb
+++ b/lib/motion/project/builder.rb
@@ -25,7 +25,7 @@ require 'thread'
 
 module Motion; module Project;
   class Builder
-    include Rake::DSL if Rake.const_defined?(:DSL)
+    include Rake::DSL if Object.const_defined?(:Rake) && Rake.const_defined?(:DSL)
 
     def build(config, platform, opts)
       datadir = config.datadir
@@ -65,10 +65,17 @@ module Motion; module Project;
       objs_build_dir = File.join(build_dir, 'objs')
       FileUtils.mkdir_p(objs_build_dir)
       any_obj_file_built = false
+      project_files = Dir.glob("**/*.rb").map{ |x| File.expand_path(x) }
+      is_default_archs = (archs == config.default_archs[platform])
+
       build_file = Proc.new do |path|
         rpath = path
         path = File.expand_path(path)
-        obj = File.join(objs_build_dir, "#{path}.o")
+        files_build_dir = objs_build_dir
+        if is_default_archs && !project_files.include?(path)
+          files_build_dir = File.expand_path(File.join(Builder.common_build_dir, files_build_dir))
+        end
+        obj = File.join(files_build_dir, "#{path}.o")
         should_rebuild = (!File.exist?(obj) \
             or File.mtime(path) > File.mtime(obj) \
             or File.mtime(ruby) > File.mtime(obj))
@@ -86,13 +93,13 @@ module Motion; module Project;
             raise "Can't locate kernel file" unless File.exist?(kernel)
    
             # LLVM bitcode.
-            bc = File.join(objs_build_dir, "#{path}.#{arch}.bc")
+            bc = File.join(files_build_dir, "#{path}.#{arch}.bc")
             bs_flags = bs_files.map { |x| "--uses-bs \"" + x + "\" " }.join(' ')
             arch_cmd = (arch =~ /^arm/) ? "/usr/bin/arch -arch i386" : "/usr/bin/arch -arch #{arch}"
             sh "/usr/bin/env VM_KERNEL_PATH=\"#{kernel}\" VM_OPT_LEVEL=\"#{config.opt_level}\" #{arch_cmd} #{ruby} #{bs_flags} --emit-llvm \"#{bc}\" #{init_func} \"#{path}\""
    
             # Assembly.
-            asm = File.join(objs_build_dir, "#{path}.#{arch}.s")
+            asm = File.join(files_build_dir, "#{path}.#{arch}.s")
             llc_arch = case arch
               when 'i386'; 'x86'
               when 'x86_64'; 'x86-64'
@@ -102,7 +109,7 @@ module Motion; module Project;
             sh "#{llc} \"#{bc}\" -o=\"#{asm}\" -march=#{llc_arch} -relocation-model=pic -disable-fp-elim -jit-enable-eh -disable-cfi"
    
             # Object.
-            arch_obj = File.join(objs_build_dir, "#{path}.#{arch}.o")
+            arch_obj = File.join(files_build_dir, "#{path}.#{arch}.o")
             sh "#{cc} -fexceptions -c -arch #{arch} \"#{asm}\" -o \"#{arch_obj}\""
   
             [bc, asm].each { |x| File.unlink(x) }
@@ -519,6 +526,16 @@ PLIST
       end
 =end
     end
+
+    class << self
+      def common_build_dir
+        dir = File.expand_path("~/Library/RubyMotion/build")
+        unless File.exist?(dir)
+          FileUtils.mkdir_p dir
+        end
+        dir
+      end
+    end
   end
 
   class Dependency
diff --git a/lib/motion/project/xcode_config.rb b/lib/motion/project/xcode_config.rb
index 3d7d5c30..c29f280f 100644
--- a/lib/motion/project/xcode_config.rb
+++ b/lib/motion/project/xcode_config.rb
@@ -209,16 +209,18 @@ EOS
       end
     end
 
-    def archs
-      @archs ||= begin
-        h = {}
-        platforms.each do |platform|
-          h[platform] = Dir.glob(File.join(datadir, platform, '*.bc')).map do |path|
-            path.scan(/kernel-(.+).bc$/)[0][0]
-          end
+    def default_archs
+      h = {}
+      platforms.each do |platform|
+        h[platform] = Dir.glob(File.join(datadir, platform, '*.bc')).map do |path|
+          path.scan(/kernel-(.+).bc$/)[0][0]
         end
-        h
       end
+      h
+    end
+
+    def archs
+      @archs ||= default_archs
     end
 
     def arch_flags(platform)