Support to build on pwd != mruby source root

1 files changed, 25 insertions, 24 deletions

diff --git a/Rakefile b/Rakefile
index 74e714ca3..1c65321f5 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,46 +1,47 @@
 # encoding: utf-8
 # Build description.
 # basic build file for mruby
+MRUBY_ROOT = File.dirname(File.expand_path(__FILE__))
 
-load 'tasks/ruby_ext.rake'
-load 'tasks/mruby_build.rake'
-load 'tasks/mrbgem_spec.rake'
+# load build systems
+load "#{MRUBY_ROOT}/tasks/ruby_ext.rake"
+load "#{MRUBY_ROOT}/tasks/mruby_build.rake"
+load "#{MRUBY_ROOT}/tasks/mrbgem_spec.rake"
 
-##############################
-# compile flags
-load 'build_config.rb'
-
-MRUBY_CONFIGS = ['build_config.rb']
-if ENV['MRUBY_CONFIG']
-  MRUBY_CONFIGS << ENV['MRUBY_CONFIG']
-  load ENV['MRUBY_CONFIG']
+# load configuration file
+MRUBY_CONFIGS = ["#{MRUBY_ROOT}/build_config.rb", ENV['MRUBY_CONFIG']].compact
+MRUBY_CONFIGS.each do |config|
+  load config unless config.empty?
 end
 
+# load basic rules
 MRuby.each_target do |build|
   build.define_rules
 end
 
-load 'src/mruby_core.rake'
-load 'mrblib/mrblib.rake'
-load 'tools/mrbc/mrbc.rake'
+# load custom rules
+load "#{MRUBY_ROOT}/src/mruby_core.rake"
+load "#{MRUBY_ROOT}/mrblib/mrblib.rake"
+load "#{MRUBY_ROOT}/tools/mrbc/mrbc.rake"
+
+load "#{MRUBY_ROOT}/tasks/mrbgems.rake"
+load "#{MRUBY_ROOT}/tasks/libmruby.rake"
+load "#{MRUBY_ROOT}/tools/mruby/mruby.rake"
+load "#{MRUBY_ROOT}/tools/mirb/mirb.rake"
 
-load 'tasks/mrbgems.rake'
-load 'tasks/libmruby.rake'
-load 'tools/mruby/mruby.rake'
-load 'tools/mirb/mirb.rake'
+load "#{MRUBY_ROOT}/tasks/mrbgems_test.rake"
+load "#{MRUBY_ROOT}/test/mrbtest.rake"
 
-load 'tasks/mrbgems_test.rake'
-load 'test/mrbtest.rake'
 
 ##############################
 # generic build targets, rules
 task :default => :all
 
 depfiles = MRuby.targets['host'].bins.map do |bin|
-  install_path = MRuby.targets['host'].exefile("bin/#{bin}")
-  
-  file install_path => MRuby.targets['host'].exefile("build/host/bin/#{bin}") do |t|
-    FileUtils.rm t.name, :force => true
+  install_path = MRuby.targets['host'].exefile("#{MRUBY_ROOT}/bin/#{bin}")
+  source_path = MRuby.targets['host'].exefile("#{MRuby.targets['host'].build_dir}/bin/#{bin}")
+
+  file install_path => source_path do |t|
     FileUtils.cp t.prerequisites.first, t.name
   end