Install a library with a podspec from another source. Can be file, http, ftp.

lib/cocoapods/dependency.rb

@@ -48,10 +48,20 @@ module Pod
       @specification ||= begin
         # This is an external podspec
         pod_root = Config.instance.project_pods_root + @name
-        downloader = Downloader.for_source(pod_root, @external_spec_source)
-        downloader.download
-        file = pod_root + "#{@name}.podspec"
-        Specification.from_file(file)
+        spec = nil
+        if @external_spec_source[:podspec]
+          Config.instance.project_pods_root.mkdir
+          spec = Config.instance.project_pods_root + "#{@name}.podspec"
+          # can be http, file, etc
+          require 'open-uri'
+          open(@external_spec_source[:podspec]) do |io|
+            spec.open('w') { |f| f << io.read }
+          end
+        else
+          Downloader.for_source(pod_root, @external_spec_source).download
+          spec = pod_root + "#{@name}.podspec"
+        end
+        Specification.from_file(spec)
       end
     end
 

lib/cocoapods/specification.rb

@@ -287,8 +287,9 @@ module Pod
     def install!
       puts "==> Installing: #{self}" unless config.silent?
       config.project_pods_root.mkpath
-      require 'fileutils'
-      FileUtils.cp(defined_in_file, config.project_pods_root)
+      unless (config.project_pods_root + defined_in_file.basename).exist?
+        FileUtils.cp(defined_in_file, config.project_pods_root)
+      end
 
       # In case this spec is part of another pod's source, we need to dowload
       # the other pod's source.

spec/integration_spec.rb

@@ -70,6 +70,22 @@ else
             `git config --get remote.origin.url`.strip.should == url
           end
         end
+
+        it "installs a library with a podspec outside of the repo" do
+          podfile = Pod::Podfile.new do
+            self.platform :ios
+            # TODO use a local file instead of http?
+            dependency 'Reachability', :podspec => 'https://raw.github.com/gist/1349824/3ec6aa60c19113573fc48eac19d0fafd6a69e033/Reachability.podspec'
+          end
+
+          installer = SpecHelper::Installer.new(podfile)
+          installer.install!
+
+          spec = Pod::Spec.from_file(config.project_pods_root + 'Reachability.podspec')
+          spec.version.to_s.should == '1.2.3'
+
+          (config.project_pods_root + 'ASIHTTPRequest').should.exist
+        end
       end
 
       before do