rails 3.1 and ruby-1.9.2-p180 - rake aborted! stack level too deep

Ran into the following error when running rake with a rails 3.1 (rc4) app on ruby-1.9.2-p180 (RVM)

rake aborted! stack level too deep

Full error stack

$> rake --tasks

/Users/HOME_DIR/.rvm/gems/ruby-1.9.2-p180/gems/rake-0.9.2/lib/rake/version.rb:4: warning: already initialized constant MAJOR
/Users/HOME_DIR/.rvm/gems/ruby-1.9.2-p180/gems/rake-0.9.2/lib/rake/version.rb:5: warning: already initialized constant MINOR
/Users/HOME_DIR/.rvm/gems/ruby-1.9.2-p180/gems/rake-0.9.2/lib/rake/version.rb:6: warning: already initialized constant BUILD
/Users/HOME_DIR/.rvm/gems/ruby-1.9.2-p180/gems/rake-0.9.2/lib/rake/version.rb:3: warning: already initialized constant NUMBERS
/Users/HOME_DIR/.rvm/gems/ruby-1.9.2-p180/gems/rake-0.9.2/lib/rake/version.rb:9: warning: already initialized constant VERSION
/Users/HOME_DIR/.rvm/gems/ruby-1.9.2-p180/gems/rake-0.9.2/lib/rake.rb:26: warning: already initialized constant RAKEVERSION
/Users/HOME_DIR/.rvm/gems/ruby-1.9.2-p180/gems/rake-0.9.2/lib/rake/early_time.rb:17: warning: already initialized constant EARLY
/Users/HOME_DIR/.rvm/gems/ruby-1.9.2-p180/gems/rake-0.9.2/lib/rake/alt_system.rb:32: warning: already initialized constant WINDOWS
/Users/HOME_DIR/.rvm/gems/ruby-1.9.2-p180/gems/rake-0.9.2/lib/rake/application.rb:28: warning: already initialized constant DEFAULT_RAKEFILES
WARNING: Possible conflict with Rake extension: String#ext already exists
WARNING: Possible conflict with Rake extension: String#pathmap already exists
/Users/HOME_DIR/.rvm/gems/ruby-1.9.2-p180/gems/rake-0.9.2/lib/rake/task_arguments.rb:73: warning: already initialized constant EMPTY_TASK_ARGS
/Users/HOME_DIR/.rvm/gems/ruby-1.9.2-p180/gems/rake-0.9.2/lib/rake/invocation_chain.rb:49: warning: already initialized constant EMPTY
/Users/HOME_DIR/.rvm/gems/ruby-1.9.2-p180/gems/rake-0.9.2/lib/rake/file_utils.rb:10: warning: already initialized constant RUBY
/Users/HOME_DIR/.rvm/gems/ruby-1.9.2-p180/gems/rake-0.9.2/lib/rake/file_utils.rb:84: warning: already initialized constant LN_SUPPORTED
/Users/HOME_DIR/.rvm/gems/ruby-1.9.2-p180/gems/rake-0.9.2/lib/rake/dsl_definition.rb:143: warning: already initialized constant Commands
/Users/HOME_DIR/.rvm/gems/ruby-1.9.2-p180/gems/rake-0.9.2/lib/rake/file_list.rb:44: warning: already initialized constant ARRAY_METHODS
/Users/HOME_DIR/.rvm/gems/ruby-1.9.2-p180/gems/rake-0.9.2/lib/rake/file_list.rb:47: warning: already initialized constant MUST_DEFINE
/Users/HOME_DIR/.rvm/gems/ruby-1.9.2-p180/gems/rake-0.9.2/lib/rake/file_list.rb:51: warning: already initialized constant MUST_NOT_DEFINE
/Users/HOME_DIR/.rvm/gems/ruby-1.9.2-p180/gems/rake-0.9.2/lib/rake/file_list.rb:55: warning: already initialized constant SPECIAL_RETURN
/Users/HOME_DIR/.rvm/gems/ruby-1.9.2-p180/gems/rake-0.9.2/lib/rake/file_list.rb:61: warning: already initialized constant DELEGATING_METHODS
/Users/HOME_DIR/.rvm/gems/ruby-1.9.2-p180/gems/rake-0.9.2/lib/rake/file_list.rb:364: warning: already initialized constant DEFAULT_IGNORE_PATTERNS
/Users/HOME_DIR/.rvm/gems/ruby-1.9.2-p180/gems/rake-0.9.2/lib/rake/file_list.rb:370: warning: already initialized constant DEFAULT_IGNORE_PROCS
/Users/HOME_DIR/.rvm/gems/ruby-1.9.2-p180/gems/rake-0.9.2/lib/rake.rb:64: warning: already initialized constant FileList
/Users/HOME_DIR/.rvm/gems/ruby-1.9.2-p180/gems/rake-0.9.2/lib/rake.rb:65: warning: already initialized constant RakeFileUtils
rake aborted!
stack level too deep

(See full trace by running task with --trace)

Steps to replicate, from the command line

• rails new sample_app
• cd sample_app
• rake --tasks

The solution, prefix calls to rake with bundle exec

bundle exec rake --tasks

Resources

• http://yehudakatz.com/2011/05/30/gem-versioning-and-bundler-doing-it-right/
• https://github.com/RailsApps/railsapps.github.com/wiki/installing-rails-3-1  

rails 3.1 asset gem

Package up assets into a gem for use in rails 3.1 applications. Example uses javascript files, but the same should work for images and css.

I recommend you click the HD link on the player and view it on Vimeo in full screen mode, this embed version is not so crisp.

Resources

• http://railscasts.com/episodes/245-new-gem-with-bundler
• http://edgeapi.rubyonrails.org/classes/Rails/Engine.html
• http://ryanbigg.com/2011/06/a-potential-use-for-asset-pipelining/

robocopy fix for exit code of 2

Sometimes you want to use robocopy from nant, a sql job or another build tool, robocopy will return 2 during a successful run, this gets interpreted as an error, a google search on the issue returned this article Fixing Robocopy for SQL Server Jobs.

Robocopy is now installed by default on Windows7 and Windows Server 2008
http://technet.microsoft.com/en-us/library/cc733145(WS.10).aspx

here is robocopy_fix.bat based on the code in the "Fixing Robocopy for SQL Server Jobs" article