<What are the main components?
To ensure that CocoaPods has a clean and easily accessible code-base we split the work among a collection of ruby gems. These work together to bring the pod command to life.
<CocoaPods
The CocoaPods gem which includes the command line support and the installer. This handles all of the user interactions for CocoaPods.
<Cocoapods-Core
The CocoaPods-Core gem provides support to work with the models of CocoaPods, for example the Podspecs or the Podfile.
<Xcodeproj
The Xcodeproj gem lets you create and modify Xcode projects from Ruby. Script boring management tasks or build Xcode-friendly libraries. Also includes support for Xcode workspaces (.xcworkspace) and configuration files (.xcconfig).
<Cocoapods-Downloader
The Cocoapods-downloader gem is a small library that provides downloaders for various source control types (HTTP/SVN/Git/Mercurial). It can deal with tags, commits, revisions, branches, extracting files from zips and almost anything these source control system would use.
<CLAide
The CLAide gem is a simple command line parser, which provides an API that allows you to quickly create a full featured command-line interface.
<Molinillo
The Molinillo gem is a generic dependency resolution algorithm, used in CocoaPods, Bundler and RubyGems.