Provide a Ruby extension.

This adds a Ruby extension in ruby/ that is based on the 'upb' library
(now included as a submodule), and adds support for Ruby code generation
to the protoc compiler.

.gitmodules

+[submodule "upb"]
+	path = upb
+	url = https://github.com/haberman/upb

Makefile.am

@@ -238,7 +238,18 @@ python_EXTRA_DIST=                                                           \
   python/stubout.py                                                          \
   python/README.txt
 
-all_EXTRA_DIST=$(java_EXTRA_DIST) $(python_EXTRA_DIST)
+ruby_EXTRA_DIST=                                                             \
+  ruby/ext/defs.c                                                            \
+  ruby/ext/encode_decode.c                                                   \
+  ruby/ext/extconf.rb                                                        \
+  ruby/ext/message.c                                                         \
+  ruby/ext/protobuf.c                                                        \
+  ruby/ext/protobuf.h                                                        \
+  ruby/ext/repeated_field.c                                                  \
+  ruby/ext/storage.c                                                         \
+  ruby/ext/test.rb
+
+all_EXTRA_DIST=$(java_EXTRA_DIST) $(python_EXTRA_DIST) $(ruby_EXTRA_DIST)
 
 EXTRA_DIST = $(@DIST_LANG@_EXTRA_DIST)                                       \
   autogen.sh                                                                 \

autogen.sh

@@ -37,5 +37,9 @@ sed -i -e 's/RuntimeLibrary="5"/RuntimeLibrary="3"/g;
 # TODO(kenton):  Remove the ",no-obsolete" part and fix the resulting warnings.
 autoreconf -f -i -Wall,no-obsolete
 
+# pull down git submodules.
+git submodule init
+git submodule update
+
 rm -rf autom4te.cache config.h.in~
 exit 0

configure.ac

@@ -23,7 +23,7 @@ AC_CONFIG_MACRO_DIR([m4])
 AC_ARG_VAR(DIST_LANG, [language to include in the distribution package (i.e., make dist)])
 case "$DIST_LANG" in
   "") DIST_LANG=cpp ;;
-  all | cpp | java | python | javanano) ;;
+  all | cpp | java | python | javanano | ruby) ;;
   *) AC_MSG_FAILURE([unknown language: $DIST_LANG]) ;;
 esac
 AC_SUBST(DIST_LANG)

ruby/README.md

+This directory contains the Ruby extension that implements Protocol Buffers
+functionality in Ruby.
+
+The Ruby extension makes use of generated Ruby code that defines message and
+enum types in a Ruby DSL. You may write definitions in this DSL directly, but
+we recommend using protoc's Ruby generation support with .proto files. The
+build process in this directory only installs the extension; you need to
+install protoc as well to have Ruby code generation functionality.
+
+Installation
+------------
+
+To build this Ruby extension, you will need:
+
+* Rake
+* Bundler
+* Ruby development headers
+* a C compiler
+* the upb submodule
+
+First, ensure that upb/ is checked out:
+
+    $ cd ..   # top level protobuf directory
+    $ git submodule init
+    $ git submodule update
+
+Then install the required Ruby gems:
+
+    $ sudo gem install bundler rake rake-compiler rspec rubygems-tasks
+
+Then build the Gem:
+
+    $ rake gem
+    $ gem install pkg/protobuf-$VERSION.gem

ruby/Rakefile

+require "rake/extensiontask"
+require "rake/testtask"
+
+spec = Gem::Specification.new do |s|
+  s.name        = "protobuf"
+  s.version     = "2.6.2"
+  s.licenses    = ["BSD"]
+  s.summary     = "Protocol Buffers"
+  s.description = "Protocol Buffers are Google's data interchange format."
+  s.authors     = ["Protobuf Authors"]
+  s.email       = "protobuf@googlegroups.com"
+
+  s.files       = ["lib/protobuf_c.so", "lib/protobuf.rb"]
+end
+
+Rake::ExtensionTask.new("protobuf_c", spec) do |ext|
+  ext.lib_dir = "lib"
+  ext.config_script = "extconf.rb"
+end
+
+Rake::TestTask.new(:test => :build) do |t|
+  t.test_files = FileList["tests/*.rb"]
+end
+
+task :chmod do
+  File.chmod(0755, "lib/protobuf_c.so")
+end
+
+Gem::PackageTask.new(spec) do |pkg|
+end
+task :package => :chmod
+task :gem => :chmod
+
+task :build => [:clean, :compile]
+task :default => [:build]
+
+# vim:sw=2:et

ruby/ext/protobuf_c/extconf.rb

+#!/usr/bin/ruby
+
+require 'mkmf'
+
+upb_path = File.absolute_path(File.dirname($0)) + "/../../../upb"
+libs = ["upb_pic", "upb.pb_pic", "upb.json_pic"]
+system("cd #{upb_path}; make " + libs.map{|l| "lib/lib#{l}.a"}.join(" "))
+
+$CFLAGS += " -O3 -std=c99 -Wno-unused-function -DNDEBUG"
+
+find_header("upb/upb.h", upb_path) or
+  raise "Can't find upb headers"
+find_library("upb_pic", "upb_msgdef_new", upb_path + "/lib") or
+  raise "Can't find upb lib"
+find_library("upb.pb_pic", "upb_pbdecoder_init", upb_path + "/lib") or
+  raise "Can't find upb.pb lib"
+find_library("upb.json_pic", "upb_json_printer_init", upb_path + "/lib") or
+  raise "Can't find upb.pb lib"
+
+$objs = ["protobuf.o", "defs.o", "storage.o", "message.o",
+         "repeated_field.o", "encode_decode.o"]
+
+create_makefile("protobuf_c")

ruby/ext/protobuf_c/protobuf.c

+// Protocol Buffers - Google's data interchange format
+// Copyright 2014 Google Inc.  All rights reserved.
+// https://developers.google.com/protocol-buffers/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#include "protobuf.h"
+
+// -----------------------------------------------------------------------------
+// Global map from upb {msg,enum}defs to wrapper Descriptor/EnumDescriptor
+// instances.
+// -----------------------------------------------------------------------------
+
+// This is a hash table from def objects (encoded by converting pointers to
+// Ruby integers) to MessageDef/EnumDef instances (as Ruby values).
+VALUE upb_def_to_ruby_obj_map;
+
+void add_def_obj(const void* def, VALUE value) {
+  rb_hash_aset(upb_def_to_ruby_obj_map, ULL2NUM((intptr_t)def), value);
+}
+
+VALUE get_def_obj(const void* def) {
+  return rb_hash_aref(upb_def_to_ruby_obj_map, ULL2NUM((intptr_t)def));
+}
+
+// -----------------------------------------------------------------------------
+// Utilities.
+// -----------------------------------------------------------------------------
+
+// Raises a Ruby error if |status| is not OK, using its error message.
+void check_upb_status(const upb_status* status, const char* msg) {
+  if (!upb_ok(status)) {
+    rb_raise(rb_eRuntimeError, "%s: %s\n", msg, upb_status_errmsg(status));
+  }
+}
+
+// String encodings: we look these up once, at load time, and then cache them
+// here.
+rb_encoding* kRubyStringUtf8Encoding;
+rb_encoding* kRubyStringASCIIEncoding;
+rb_encoding* kRubyString8bitEncoding;
+
+// -----------------------------------------------------------------------------
+// Initialization/entry point.
+// -----------------------------------------------------------------------------
+
+// This must be named "Init_protobuf_c" because the Ruby module is named
+// "protobuf_c" -- the VM looks for this symbol in our .so.
+void Init_protobuf_c() {
+  VALUE google = rb_define_module("Google");
+  VALUE protobuf = rb_define_module_under(google, "Protobuf");
+  VALUE internal = rb_define_module_under(protobuf, "Internal");
+  DescriptorPool_register(protobuf);
+  Descriptor_register(protobuf);
+  FieldDescriptor_register(protobuf);
+  EnumDescriptor_register(protobuf);
+  MessageBuilderContext_register(internal);
+  EnumBuilderContext_register(internal);
+  Builder_register(internal);
+  RepeatedField_register(protobuf);
+
+  rb_define_singleton_method(protobuf, "encode", Google_Protobuf_encode, 1);
+  rb_define_singleton_method(protobuf, "decode", Google_Protobuf_decode, 2);
+  rb_define_singleton_method(protobuf, "encode_json",
+                             Google_Protobuf_encode_json, 1);
+  rb_define_singleton_method(protobuf, "decode_json",
+                             Google_Protobuf_decode_json, 2);
+
+  rb_define_singleton_method(protobuf, "deep_copy",
+                             Google_Protobuf_deep_copy, 1);
+
+  kRubyStringUtf8Encoding = rb_utf8_encoding();
+  kRubyStringASCIIEncoding = rb_usascii_encoding();
+  kRubyString8bitEncoding = rb_ascii8bit_encoding();
+
+  upb_def_to_ruby_obj_map = rb_hash_new();
+  rb_gc_register_address(&upb_def_to_ruby_obj_map);
+}

ruby/lib/protobuf.rb

+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+require 'protobuf_c'

src/Makefile.am

@@ -260,7 +260,8 @@ libprotoc_la_SOURCES =                                         \
   google/protobuf/compiler/javanano/javanano_message_field.cc  \
   google/protobuf/compiler/javanano/javanano_message.h         \
   google/protobuf/compiler/javanano/javanano_primitive_field.cc \
-  google/protobuf/compiler/python/python_generator.cc
+  google/protobuf/compiler/python/python_generator.cc          \
+  google/protobuf/compiler/ruby/ruby_generator.cc
 
 bin_PROGRAMS = protoc
 protoc_LDADD = $(PTHREAD_LIBS) libprotobuf.la libprotoc.la

upb @ 56913be6

+Subproject commit 56913be6bb57f81dbbf7baf9cc9a0a2cd1a36493