ruby-on-rails - 为什么在 Rails 中需要 binstubs？

Question

我不完全理解 Rails 中 binstubs 功能的用途。

例如，当我运行 bin/bundle binstubs rspec-rails 时，我得到以下输出:

rspec-rails has no executables, but you may want one from a gem it depends on.
  railties has: rails
  rspec-core has: autospec, rspec

这是什么意思？为什么我需要 bin/bundle binstubs rspec-core 命令？

Answer 1

Binstubs are wrapper scripts around executables (sometimes referred toas "binaries", although they don't have to be compiled) whose purposeis to prepare the environment before dispatching the call to theoriginal executable.

In the Ruby world, the most common binstubs are the ones that RubyGemsgenerates after installing a gem that contains executables. Butbinstubs can be written in any language, and it often makes sense tocreate them manually.

来源:rbenv wiki – Understanding binstubs