Rename protobuf Ruby module to google/protobuf and rework its build

system. The Ruby module build now uses an amalgamated distribution of
upb, and successfully builds a Ruby gem called 'google-protobuf' with
module 'google/protobuf'.

.gitmodules

@@ -1,3 +0,0 @@
-[submodule "upb"]
-	path = upb
-	url = https://github.com/haberman/upb

autogen.sh

@@ -39,9 +39,5 @@ 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

ruby/Rakefile

@@ -1,35 +1,19 @@
 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
+spec = Gem::Specification.load("google-protobuf.gemspec")
 
 Rake::ExtensionTask.new("protobuf_c", spec) do |ext|
-  ext.lib_dir = "lib"
-  ext.config_script = "extconf.rb"
+  ext.ext_dir = "ext/google/protobuf_c"
+  ext.lib_dir = "lib/google"
 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]

ruby/ext/google/protobuf_c/extconf.rb

@@ -0,0 +1,10 @@
+#!/usr/bin/ruby
+
+require 'mkmf'
+
+$CFLAGS += " -O3 -std=c99 -Wno-unused-function -DNDEBUG "
+
+$objs = ["protobuf.o", "defs.o", "storage.o", "message.o",
+         "repeated_field.o", "encode_decode.o", "upb.o"]
+
+create_makefile("google/protobuf_c")

ruby/ext/google/protobuf_c/protobuf.h

@@ -35,15 +35,7 @@
 #include <ruby/vm.h>
 #include <ruby/encoding.h>
 
-#include "upb/def.h"
-#include "upb/handlers.h"
-#include "upb/pb/decoder.h"
-#include "upb/pb/encoder.h"
-#include "upb/pb/glue.h"
-#include "upb/json/parser.h"
-#include "upb/json/printer.h"
-#include "upb/shim/shim.h"
-#include "upb/symtab.h"
+#include "upb.h"
 
 // Forward decls.
 struct DescriptorPool;

ruby/ext/protobuf_c/extconf.rb

@@ -1,23 +0,0 @@
-#!/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/google-protobuf.gemspec

@@ -0,0 +1,22 @@
+class << Gem::Specification
+  def find_c_source(dir)
+    `cd #{dir}; git ls-files "*.c" "*.h" extconf.rb Makefile`.split
+    .map{|f| "#{dir}/#{f}"}
+  end
+end
+
+Gem::Specification.new do |s|
+  s.name        = "google-protobuf"
+  s.version     = "3.0.0.alpha.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.require_paths = ["lib"]
+  s.extensions  = ["ext/google/protobuf_c/extconf.rb"]
+  s.files       = ["lib/google/protobuf.rb"] +
+                  # extension C source
+                  find_c_source("ext/google/protobuf_c")
+  s.test_files = `git ls-files -- tests`.split
+end

ruby/lib/google/protobuf.rb

@@ -28,4 +28,4 @@
 # (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'
+require 'google/protobuf_c'

ruby/tests/basic.rb

@@ -1,6 +1,6 @@
 #!/usr/bin/ruby
 
-require 'protobuf'
+require 'google/protobuf'
 require 'test/unit'
 
 # ------------- generated code --------------

ruby/tests/stress.rb

@@ -1,6 +1,6 @@
 #!/usr/bin/ruby
 
-require 'protobuf'
+require 'google/protobuf'
 require 'test/unit'
 
 module StressTest

src/google/protobuf/compiler/ruby/ruby_generator.cc

@@ -261,7 +261,7 @@ void GenerateFile(const google::protobuf::FileDescriptor* file,
     "filename", file->name());
 
   printer->Print(
-    "require 'protobuf'\n\n");
+    "require 'google/protobuf'\n\n");
 
   for (int i = 0; i < file->dependency_count(); i++) {
     const std::string& name = file->dependency(i)->name();

upb

@@ -1 +0,0 @@
-Subproject commit 56913be6bb57f81dbbf7baf9cc9a0a2cd1a36493