Move to using tap cmd directory.

[jsfaint]

With this modification brew-rmtree can be used without brew install
brew tap beeftornado/rmtree is enough :)

Just like brew-cask changed in Homebrew/homebrew-cask#15381

• brew-rmtree.rb
  Move brew-rmtree.rb to cmd/brew-rmtree.rb.
• Formula/brew-rmtree.rb
  Remove Formula, because we don't need it anymore.
• README.md
  Modify the installation section.

[beeftornado]

I'm not sure I completely understand how this works yet, but the concept sounds great. Let me test it out locally to get a feel for it and I'll get back to you. Thanks for the link to cask's PR

[jsfaint]

Hi @beeftornado you can refer the external command part of this article
https://github.com/Homebrew/homebrew/blob/master/share/doc/homebrew/How-to-Create-and-Maintain-a-Tap.md

[bfontaine]

I came here to write the same PR 😄

@beeftornado In addition to the PATH, Homebrew checks the cmd directory of each tap to find commands. So any executable named brew-something (or brew-something.rb if it’s in Ruby) under cmd/ will be available as a command.

[tsparber]

brew doctor is now issuing a warning for the brew-rmtree.rb file in the taps root.

Warning: Found Ruby file outside beeftornado/rmtree tap formula directory
(/usr/local/Homebrew/Library/Taps/beeftornado/homebrew-rmtree/Formula):
  /usr/local/Homebrew/Library/Taps/beeftornado/homebrew-rmtree/brew-rmtree.rb

Using this PR fixes the warning too. Thank you for the script!

[sepehr]

Doctor's warning is getting annoying. That'd be great if you consider merging this. @beeftornado