Experimental support for ios_framework rules

* Allows for building and linking to a framework in ios_application
* Currently only works for single arch builds
* Xcode generation produces correct target type, but is mostly untested

The implementation is very similar to that of objc_framework:

1) Build the ios_framework_binary as a dynamic library (-dynamiclib)

2) Symlink the library and public headers to a staging location, inside of "X.framework" bundle. Where X is the name under ios_framework_binary#framework_name

3) Pass the bundle content to ObjcCommon.addFrameworkImports, reusing the core of objc_framework rule implementation. This results in correctly set -F/-framework flags and allows clients to use the framework in a way they would use any SDK/3rd-party framework. It's allowed to import headers via #import <X/X.h> call.

4) Copy the binary and all resources into final application bundle under Frameworks/X.framework

5) Sign the app and nested frameworks

--
MOS_MIGRATED_REVID=100397239

1 files changed, 10 insertions, 2 deletions

diff --git a/src/objc_tools/xcodegen/java/com/google/devtools/build/xcode/xcodegen/XcodeprojGeneration.java b/src/objc_tools/xcodegen/java/com/google/devtools/build/xcode/xcodegen/XcodeprojGeneration.java
index 496d50df56..9108913522 100644
--- a/src/objc_tools/xcodegen/java/com/google/devtools/build/xcode/xcodegen/XcodeprojGeneration.java
+++ b/src/objc_tools/xcodegen/java/com/google/devtools/build/xcode/xcodegen/XcodeprojGeneration.java
@@ -84,6 +84,7 @@ public class XcodeprojGeneration {
   public static final String FILE_TYPE_WRAPPER_APPLICATION = "wrapper.application";
   public static final String FILE_TYPE_WRAPPER_BUNDLE = "wrapper.cfbundle";
   public static final String FILE_TYPE_APP_EXTENSION = "wrapper.app-extension";
+  public static final String FILE_TYPE_FRAMEWORK = "wrapper.frawework";
   private static final String DEFAULT_OPTIONS_NAME = "Debug";
   private static final Escaper QUOTE_ESCAPER = Escapers.builder().addEscape('"', "\\\"").build();
 
@@ -128,13 +129,15 @@ public class XcodeprojGeneration {
       ProductType.APPLICATION,
       ProductType.BUNDLE,
       ProductType.UNIT_TEST,
-      ProductType.APP_EXTENSION);
+      ProductType.APP_EXTENSION,
+      ProductType.FRAMEWORK);
 
   private static final EnumSet<ProductType> PRODUCT_TYPES_THAT_HAVE_A_BINARY = EnumSet.of(
       ProductType.APPLICATION,
       ProductType.BUNDLE,
       ProductType.UNIT_TEST,
-      ProductType.APP_EXTENSION);
+      ProductType.APP_EXTENSION,
+      ProductType.FRAMEWORK);
 
   /**
    * Detects the product type of the given target based on multiple fields in {@code targetControl}.
@@ -201,6 +204,11 @@ public class XcodeprojGeneration {
         return FileReference.of(
             String.format("%s.appex", productName), SourceTree.BUILT_PRODUCTS_DIR)
                 .withExplicitFileType(FILE_TYPE_APP_EXTENSION);
+      case FRAMEWORK:
+        return FileReference.of(
+            String.format("%s.framwork", productName), SourceTree.BUILT_PRODUCTS_DIR)
+                .withExplicitFileType(FILE_TYPE_FRAMEWORK);
+
       default:
         throw new IllegalArgumentException("unknown: " + type);
     }