Append the contents of Specification#prefix_header_file to the Pods library's pch. Closes #169.

lib/cocoapods/installer/target_installer.rb

@@ -35,11 +35,18 @@ module Pod
       end
 
       # TODO move out to Generator::PrefixHeader
-      def save_prefix_header_as(pathname)
+      def save_prefix_header_as(pathname, pods)
         pathname.open('w') do |header|
           header.puts "#ifdef __OBJC__"
           header.puts "#import #{@target_definition.platform == :ios ? '<UIKit/UIKit.h>' : '<Cocoa/Cocoa.h>'}"
           header.puts "#endif"
+          pods.each do |pod|
+            if prefix_header = pod.prefix_header_file
+              header.puts
+              header.puts "// Pods/#{prefix_header.relative_path_from(pod.sandbox.root)}"
+              header.puts prefix_header.read
+            end
+          end
         end
       end
 
@@ -92,7 +99,7 @@ module Pod
         puts "* Generating xcconfig file at `#{sandbox.root + @target_definition.xcconfig_name}'" if config.verbose?
         xcconfig.save_as(sandbox.root + @target_definition.xcconfig_name)
         puts "* Generating prefix header at `#{sandbox.root + @target_definition.prefix_header_name}'" if config.verbose?
-        save_prefix_header_as(sandbox.root + @target_definition.prefix_header_name)
+        save_prefix_header_as(sandbox.root + @target_definition.prefix_header_name, pods)
         puts "* Generating copy resources script at `#{sandbox.root + @target_definition.copy_resources_script_name}'" if config.verbose?
         copy_resources_script_for(pods).save_as(sandbox.root + @target_definition.copy_resources_script_name)
       end

lib/cocoapods/local_pod.rb

@@ -48,6 +48,12 @@ module Pod
     def clean
       clean_paths.each { |path| FileUtils.rm_rf(path) }
     end
+
+    def prefix_header_file
+      if prefix_header = specification.prefix_header_file
+        @sandbox.root + specification.name + prefix_header
+      end
+    end
     
     def source_files
       expanded_paths(specification.source_files, :glob => '*.{h,m,mm,c,cpp}', :relative_to_sandbox => true)

lib/cocoapods/specification.rb

@@ -93,6 +93,11 @@ module Pod
       @part_of = dependency(*name_and_version_requirements)
     end
 
+    def prefix_header_file=(file)
+      @prefix_header_file = Pathname.new(file)
+    end
+    attr_reader :prefix_header_file
+
     def clean_paths=(patterns)
       @clean_paths = pattern_list(patterns)
     end

spec/unit/installer/target_installer_spec.rb

@@ -3,6 +3,7 @@ require File.expand_path('../../../spec_helper', __FILE__)
 TMP_POD_ROOT = ROOT + "tmp" + "podroot" unless defined? TMP_POD_ROOT
 
 describe Pod::Installer::TargetInstaller do
+  extend SpecHelper::TemporaryDirectory
 
   before do
     @podfile = Pod::Podfile.new do
@@ -17,6 +18,7 @@ describe Pod::Installer::TargetInstaller do
     @installer = Pod::Installer::TargetInstaller.new(@podfile, @project, @target_definition)
 
     @sandbox = Pod::Sandbox.new(TMP_POD_ROOT)
+    FileUtils.cp_r(fixture('banana-lib'), TMP_POD_ROOT + 'BananaLib')
     @specification = fixture_spec('banana-lib/BananaLib.podspec')
     @pods = [Pod::LocalPod.new(@specification, @sandbox, Pod::Platform.ios)]
   end
@@ -43,23 +45,33 @@ describe Pod::Installer::TargetInstaller do
   
   it 'adds the sandbox header search paths to the xcconfig, with quotes' do
     do_install!
-    @installer.xcconfig.to_hash['HEADER_SEARCH_PATHS'].should.include("\"#{@sandbox.header_search_paths.join(" ")}\"")
+    @installer.xcconfig.to_hash['HEADER_SEARCH_PATHS'].should.include("\"#{@sandbox.header_search_paths.join('" "')}\"")
   end
-  
+
+ 
   it 'does not add the -fobjc-arc to OTHER_LDFLAGS by default as Xcode 4.3.2 does not support it' do
     do_install!
     @installer.xcconfig.to_hash['OTHER_LDFLAGS'].split(" ").should.not.include("-fobjc-arc")
   end
   
-  describe "when ARC compatibility flag is set" do
-    before do
-      @podfile.stubs(:set_arc_compatibility_flag? => true)
-    end
-    
-    it 'adds the -fobjc-arc to OTHER_LDFLAGS if any pods require arc (to support non-ARC projects on iOS 4.0)' do
-      @specification.stubs(:requires_arc).returns(true)
-      @installer.install!(@pods, @sandbox)
-      @installer.xcconfig.to_hash['OTHER_LDFLAGS'].split(" ").should.include("-fobjc-arc")
-    end
+  it 'adds the -fobjc-arc to OTHER_LDFLAGS if any pods require arc (to support non-ARC projects on iOS 4.0)' do
+    @podfile.stubs(:set_arc_compatibility_flag? => true)
+    @specification.stubs(:requires_arc).returns(true)
+    @installer.install!(@pods, @sandbox)
+    @installer.xcconfig.to_hash['OTHER_LDFLAGS'].split(" ").should.include("-fobjc-arc")
+  end
+
+  it "creates a prefix header, including the contents of the specification's prefix header" do
+    do_install!
+    prefix_header = @sandbox.root + 'Pods.pch'
+    @installer.save_prefix_header_as(prefix_header, @pods)
+    prefix_header.read.should == <<-EOS
+#ifdef __OBJC__
+#import <UIKit/UIKit.h>
+#endif
+
+// Pods/BananaLib/Classes/BananaLib.pch
+#import <BananaTree/BananaTree.h>
+EOS
   end
 end

spec/unit/specification_spec.rb

@@ -222,6 +222,12 @@ describe "A Pod::Specification, in general," do
     list = ROOT + @spec.clean_paths.first
     list.glob.should == Pod::FileList[(ROOT + '*').to_s].exclude('Rakefile').map { |path| Pathname.new(path) }
   end
+
+  it "takes a prefix header path which will be appended to the Pods pch file" do
+    @spec.prefix_header_file.should == nil
+    @spec.prefix_header_file = 'Classes/Demo.pch'
+    @spec.prefix_header_file.should == Pathname.new('Classes/Demo.pch')
+  end
 end
 
 describe "A Pod::Specification subspec" do