Revert 123894 - Remove hand-rolled protobufs generation; enable rel paths in protoc.gypi

third_party/cacheinvalidation/cacheinvalidation.gyp

Index: third_party/cacheinvalidation/cacheinvalidation.gyp
===================================================================
--- third_party/cacheinvalidation/cacheinvalidation.gyp	(revision 123895)
+++ third_party/cacheinvalidation/cacheinvalidation.gyp	(working copy)
@@ -15,13 +15,17 @@
     # we don't need this variable.
     # TODO(ghc): Remove v2/ dir and move all files up a level.
     'proto_dir_relpath': 'google/cacheinvalidation/v2',
+    # Where files generated from proto files are put.
+    'protoc_out_dir': '<(SHARED_INTERMEDIATE_DIR)/protoc_out',
+    # The path to the protoc executable.
+    'protoc': '<(PRODUCT_DIR)/<(EXECUTABLE_PREFIX)protoc<(EXECUTABLE_SUFFIX)',
   },
   'targets': [
     # The rule/action to generate files from the cacheinvalidation proto
-    # files and package them into a static library.
+    # files.
     {
       'target_name': 'cacheinvalidation_proto',
-      'type': 'static_library',
+      'type': 'none',
       'sources': [
         '<(proto_dir_root)/<(proto_dir_relpath)/client.proto',
         '<(proto_dir_root)/<(proto_dir_relpath)/client_gateway.proto',
@@ -29,18 +33,68 @@
         '<(proto_dir_root)/<(proto_dir_relpath)/client_test_internal.proto',
         '<(proto_dir_root)/<(proto_dir_relpath)/types.proto',
       ],
-      'variables': {
-        'proto_in_dir': '<(proto_dir_root)',
-        'proto_out_dir': '',
-        'proto_relpath': '<(proto_dir_relpath)/',
-        # This is necessary because these protos import with
-        # qualified paths, such as:
-        #   #import "google/cacheinvalidation/v2/client_protocol.proto"
-        # rather than the more common form of:
-        #   #import "client_protocol.proto"
-        # NOTE: The trailing slash is required, see build/protoc.gypi
+      # TODO(akalin): This block was copied from the sync_proto target
+      # from chrome.gyp.  Decomp the shared blocks out somehow.
+      'rules': [
+        {
+          'rule_name': 'genproto',
+          'extension': 'proto',
+          'inputs': [
+            '<(protoc)',
+          ],
+          'outputs': [
+            '<(protoc_out_dir)/<(proto_dir_relpath)/<(RULE_INPUT_ROOT).pb.h',
+            '<(protoc_out_dir)/<(proto_dir_relpath)/<(RULE_INPUT_ROOT).pb.cc',
+          ],
+          'action': [
+            '<(protoc)',
+            '--proto_path=<(proto_dir_root)',
+            # This path needs to be prefixed by proto_path, so we can't
+            # use RULE_INPUT_PATH (which is an absolute path).
+            '<(proto_dir_root)/<(proto_dir_relpath)/<(RULE_INPUT_NAME)',
+            '--cpp_out=<(protoc_out_dir)',
+          ],
+          'message': 'Generating C++ code from <(RULE_INPUT_PATH)',
+        },
+      ],
+      'dependencies': [
+        '../../third_party/protobuf/protobuf.gyp:protoc#host',
+      ],
+    },
+    # The C++ files generated from the cache invalidation protocol buffers.
+    {
+      'target_name': 'cacheinvalidation_proto_cpp',
+      'type': 'static_library',
+      'sources': [
+        '<(protoc_out_dir)/<(proto_dir_relpath)/client.pb.h',
+        '<(protoc_out_dir)/<(proto_dir_relpath)/client.pb.cc',
+        '<(protoc_out_dir)/<(proto_dir_relpath)/client_gateway.pb.h',
+        '<(protoc_out_dir)/<(proto_dir_relpath)/client_gateway.pb.cc',
+        '<(protoc_out_dir)/<(proto_dir_relpath)/client_protocol.pb.h',
+        '<(protoc_out_dir)/<(proto_dir_relpath)/client_protocol.pb.cc',
+        '<(protoc_out_dir)/<(proto_dir_relpath)/client_test_internal.pb.h',
+        '<(protoc_out_dir)/<(proto_dir_relpath)/client_test_internal.pb.cc',
+        '<(protoc_out_dir)/<(proto_dir_relpath)/types.pb.h',
+        '<(protoc_out_dir)/<(proto_dir_relpath)/types.pb.cc',
+      ],
+      'dependencies': [
+        '../../third_party/protobuf/protobuf.gyp:protobuf_lite',
+        'cacheinvalidation_proto',
+      ],
+      'include_dirs': [
+        '<(protoc_out_dir)',
+      ],
+      'direct_dependent_settings': {
+        'include_dirs': [
+          '<(protoc_out_dir)',
+        ],
       },
-      'includes': [ '../../build/protoc.gypi' ],
+      'export_dependent_settings': [
+        '../../third_party/protobuf/protobuf.gyp:protobuf_lite',
+      ],
+      # This target exports a hard dependency because it contains generated
+      # header files.
+      'hard_dependency': 1,
     },
     # The main cache invalidation library.  External clients should depend
     # only on this.
@@ -116,7 +170,11 @@
       'dependencies': [
         '../../base/base.gyp:base',
         'cacheinvalidation_proto',
+        'cacheinvalidation_proto_cpp',
       ],
+      # This target exports a hard dependency because its include files
+      # include generated header files from cache_invalidation_proto_cpp.
+      'hard_dependency': 1,
       'direct_dependent_settings': {
         'include_dirs': [
           './overrides',
@@ -125,7 +183,7 @@
       },
       'export_dependent_settings': [
         '../../base/base.gyp:base',
-        'cacheinvalidation_proto',
+        'cacheinvalidation_proto_cpp',
       ],
     },
     # Unittests for the cache invalidation library.