Implement a CocoaPods plugin

README.md

@@ -74,20 +74,9 @@ after_success: slather
 
 ### Coverage for code included via CocoaPods
 
-If you're trying to compute the coverage of code that has been included via CocoaPods, you can add the following to your Podfile:
-
-```ruby
-# Podfile
-
-begin
-  require 'slather'
-  Slather.prepare_pods(self)
-rescue LoadError
-  puts 'Slather has been disabled (not installed).'
-end
-```
-
-Then, tell slather where to find the source files for your Pod.
+If you're trying to compute the coverage of code that has been included via
+CocoaPods, you will need to tell slather where to find the source files for
+your Pod.
 
 ```yml
 # .slather.yml

lib/cocoapods_plugin.rb

@@ -0,0 +1,10 @@
+require 'slather'
+
+Pod::HooksManager.register(:post_install) do |installer_context|
+  sandbox_root = installer_context.sandbox_root
+  sandbox = Pod::Sandbox.new(sandbox_root)
+  project = Xcodeproj::Project.open(sandbox.project_path)
+  project.slather_setup_for_coverage()
+  project.save()
+end
+

lib/slather.rb

@@ -10,9 +10,7 @@ module Slather
   Encoding.default_external = "utf-8"
 
   def self.prepare_pods(pods)
-    pods.post_install do |installer|
-      installer.project.slather_setup_for_coverage
-    end
+    Pod::UI.warn("[Slather] prepare_pods is now deprecated. The call to prepare_pods in your Podfile can simply be ommitted.")
   end
 
 end

slather.gemspec

@@ -22,6 +22,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency "rake", "~> 10.3"
   spec.add_development_dependency "rspec", "~> 2.14"
   spec.add_development_dependency "pry", "~> 0.9"
+  spec.add_development_dependency "cocoapods", "~> 0.34"
 
   spec.add_dependency "clamp", "~> 0.6"
   spec.add_dependency "xcodeproj", "~> 0.17"

spec/slather/cocoapods_plugin_spec.rb

@@ -0,0 +1,21 @@
+require 'cocoapods'
+require File.join(File.dirname(__FILE__), '../../lib/cocoapods_plugin')
+require File.join(File.dirname(__FILE__), '..', 'spec_helper')
+
+describe Slather do
+  describe 'CocoaPods Plugin' do
+    it 'should setup slather for coverage in the Pods project' do
+      mock_project = double(Xcodeproj::Project)
+      allow(Xcodeproj::Project).to receive(:open).and_return(mock_project)
+      expect(mock_project).to receive(:slather_setup_for_coverage)
+      expect(mock_project).to receive(:save)
+
+      # Execute the post_install hook via CocoaPods
+      sandbox_root = 'Pods'
+      sandbox = Pod::Sandbox.new(sandbox_root)
+      context = Pod::Installer::HooksContext.generate(sandbox, [])
+      Pod::HooksManager.run(:post_install, context)
+    end
+  end
+end
+