update examples

vendors/Rakefile

@@ -7,10 +7,11 @@ SOUND = 'sound.zip'
 SOUND_VERSION = 'v1.3.2'
 VIDEO = 'video-2.0-beta4.zip'
 VIDEO_VERSION = 'r6-v2.0-beta4'
-EXAMPLES = '0.5.1'
+EXAMPLES = '0.5.2'
 HOME_DIR = ENV['HOME']
 LIBRARY = File.join(HOME_DIR, '.picrate', 'libraries')
-EXAMPLES_DIR = File.join(HOME_DIR, 'projects', 'examples')
+PROJECT_DIR = File.join(HOME_DIR, 'projects')
+EXAMPLES_DIR = File.join(PROJECT_DIR, 'examples')
 CLOBBER.include(EXAMPLES, SOUND, VIDEO)
 
 def dependency
@@ -78,7 +79,7 @@ desc 'copy examples'
 task copy_examples: %i[download_samples] do
   system "tar xzvf #{EXAMPLES}.tar.gz"
   FileUtils.rm_r EXAMPLES_DIR if File.exist? EXAMPLES_DIR
-  FileUtils.mkdir_p EXAMPLES_DIR
+  FileUtils.mkdir_p PROJECT_DIR unless File.exist? PROJECT_DIR
   FileUtils.cp_r "picrate-examples-#{EXAMPLES}", EXAMPLES_DIR
   FileUtils.rm_r "picrate-examples-#{EXAMPLES}"
 end