[Installer] Don't show using existing documentation message if docs should be skipped

lib/cocoapods/installer.rb

@@ -75,12 +75,13 @@ module Pod
 
     #TODO: move to generator ?
     def generate_docs(pod)
-      doc_generator = Generator::Documentation.new(pod)
-      if ( config.generate_docs? && !doc_generator.already_installed? )
+      return unless config.generate_docs?
+        doc_generator = Generator::Documentation.new(pod)
+      if doc_generator.already_installed?
+        UI.section " > Using existing documentation"
+      else
         UI.section " > Installing documentation"
         doc_generator.generate(config.doc_install?)
-      else
-        UI.section " > Using existing documentation"
       end
     end
 

spec/integration/install_add_pod/after/execution_output.txt

@@ -23,7 +23,6 @@ Downloading dependencies
     Cloning into 'ROOT/tmp/Pods/JSONKit'...
     done.
    $ /usr/bin/git checkout -b activated-pod-commit 0aff3deb5e1bb2bbc88a83fd71c8ad5550185cce
- > Using existing documentation
 
 -> Using Reachability (3.1.0)
 

spec/integration/install_new/after/execution_output.txt

@@ -19,7 +19,6 @@ Downloading dependencies
    $ /usr/bin/git reset --hard FETCH_HEAD
    HEAD is now at f7176f4 updated podspec
    $ /usr/bin/git checkout -b activated-pod-commit
- > Using existing documentation
 
 Generating support files
   - Running pre install hooks