Error: undefined method `cask' for main:Object

[jsharf]

[jsharf ~]$brew cask install amethyst
Error: undefined method cask' for main:Object Please report this bug: https://github.com/caskroom/homebrew-cask/issues /usr/local/Library/Taps/caskroom/homebrew-cask/Casks/amethyst.rb:1:in<top (required)>'
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in require' /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:inrequire'
/usr/local/Cellar/brew-cask/0.35.0/rubylib/cask/source/path.rb:13:in load' /usr/local/Cellar/brew-cask/0.35.0/rubylib/cask/source/tapped.rb:24:inload'
/usr/local/Cellar/brew-cask/0.35.0/rubylib/cask.rb:118:in load' /usr/local/Cellar/brew-cask/0.35.0/rubylib/cask/cli/install.rb:9:inblock in run'
/usr/local/Cellar/brew-cask/0.35.0/rubylib/cask/cli/install.rb:6:in each' /usr/local/Cellar/brew-cask/0.35.0/rubylib/cask/cli/install.rb:6:inrun'
/usr/local/Cellar/brew-cask/0.35.0/rubylib/cask/cli.rb:57:in run_command' /usr/local/Cellar/brew-cask/0.35.0/rubylib/cask/cli.rb:72:inprocess'
/usr/local/bin/brew-cask.rb:6:in <top (required)>' /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:inrequire'
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in require' /usr/local/Library/brew.rb:59:inrequire?'
/usr/local/Library/brew.rb:142:in `

'

[iggyvolz]

Please update homebrew cask by using: brew update && brew upgrade brew-cask && brew cleanup && brew cask cleanup

This was an unforseen backwards compatibility break.

[rolandwalker]

Hi @jsharf !

This was a very-much-foreseen backwards-compatibility break. We implemented a 6-month transition plan (#4688) which worked transparently for most folks. My sincere apologies that you caught the error here, but we are moving forward on our development plan.

The upgrade command sequence

$ brew update && brew upgrade brew-cask && brew cleanup && brew cask cleanup

should bring you up to the very latest and solve your issue.

[hoff2]

This command sequence didn't help for me.

/opt/kitchenplan(master) $ brew update
Already up-to-date.
/opt/kitchenplan(master) $ brew upgrade brew-cask
Error: brew-cask-HEAD already installed
/opt/kitchenplan(master) $ brew cleanup
/opt/kitchenplan(master) $ brew cask cleanup
==> Removing dead symlinks
==> Removing cached downloads
/opt/kitchenplan(master) $ brew cask install --appdir=/Applications recordit
Error: undefined method `cask' for main:Object
Please report this bug:
    https://github.com/caskroom/homebrew-cask/issues
/usr/local/Library/Taps/caskroom/homebrew-cask/Casks/recordit.rb:1:in `<top (required)>'
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
/usr/local/Cellar/brew-cask/HEAD/rubylib/cask/source/path.rb:19:in `load'
/usr/local/Cellar/brew-cask/HEAD/rubylib/cask/source/tapped.rb:28:in `load'
/usr/local/Cellar/brew-cask/HEAD/rubylib/cask.rb:119:in `load'
/usr/local/Cellar/brew-cask/HEAD/rubylib/cask/cli/install.rb:9:in `block in run'
/usr/local/Cellar/brew-cask/HEAD/rubylib/cask/cli/install.rb:6:in `each'
/usr/local/Cellar/brew-cask/HEAD/rubylib/cask/cli/install.rb:6:in `run'
/usr/local/Cellar/brew-cask/HEAD/rubylib/cask/cli.rb:57:in `run_command'
/usr/local/Cellar/brew-cask/HEAD/rubylib/cask/cli.rb:72:in `process'
/usr/local/bin/brew-cask.rb:6:in `<top (required)>'
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
/usr/local/Library/brew.rb:59:in `require?'
/usr/local/Library/brew.rb:142:in `<main>'

[hoff2]

Fixed with:

brew uninstall brew-cask
brew install brew-cask

[rolandwalker]

Error: brew-cask-HEAD already installed

That's right. If you installed a brew formula using the --HEAD option sometime in the past, you need to take special measures to upgrade it. The && in that ridiculous long command line would have stopped you right at brew upgrade brew-cask.

Glad you are sorted now.