1 files changed, 14 insertions, 0 deletions
diff --git a/Rakefile b/Rakefile
index 533153290..70dce2e46 100644
--- a/Rakefile
+++ b/Rakefile
@@ -8,12 +8,19 @@ MRUBY_BUILD_HOST_IS_OPENBSD = RUBY_PLATFORM.include?('openbsd')
 $LOAD_PATH << File.join(MRUBY_ROOT, "lib")
 
 # load build systems
+require 'yaml'
 require "mruby-core-ext"
 require "mruby/build"
 require "mruby/gem"
 
 # load configuration file
 MRUBY_CONFIG = (ENV['MRUBY_CONFIG'] && ENV['MRUBY_CONFIG'] != '') ? ENV['MRUBY_CONFIG'] : "#{MRUBY_ROOT}/build_config.rb"
+MRUBY_CONFIG_LOCK_FILE = "#{MRUBY_CONFIG}.lock"
+MRUBY_CONFIG_LOCK = if File.exist? MRUBY_CONFIG_LOCK_FILE
+                      YAML.load File.read MRUBY_CONFIG_LOCK_FILE
+                    else
+                      {}
+                    end
 load MRUBY_CONFIG
 
 # load basic rules
@@ -118,6 +125,13 @@ task :all => depfiles do
   MRuby.each_target do
     print_build_summary
   end
+
+  locks_result = { 'builds' => {} }
+  MRuby.each_target do
+    locks_result['builds'][name] = locks
+  end
+
+  File.write MRUBY_CONFIG_LOCK_FILE, YAML.dump(locks_result)
 end
 
 desc "run all mruby tests"