Error: Cask 'java7' is unreadable: undefined method `undent' for #

今天在执行`brew upgrade`的时候出现如下错误：

$ brew upgrade    
Updating Homebrew...
Error: Cask 'java7' is unreadable: undefined method `undent' for #<String:0x00007fcff5421ec8>

原因为某次更新之后，配置文件增加了某些不必要的字段。更要命的是，不能执行卸载命令来删除出问题的安装包。解决方法为删除这个字段。

方案如下：

$ find "$(brew --prefix)/Caskroom/"java7'/.metadata' -type f -name '*.rb' | xargs grep 'EOS.undent' --files-with-matches | xargs sed -i '' 's/EOS.undent/EOS/'

$ find "$(brew --prefix)/Caskroom/"java'/.metadata' -type f -name '*.rb' | xargs grep 'EOS.undent' --files-with-matches | xargs sed -i '' 's/EOS.undent/EOS/'

$ brew uninstall java7

$ brew cleanup

$ brew update

$ brew upgrade

参考链接

undefined method `undent' #49716