PHP namespaces for nested messages and enums (#4536)

* uses namespaces for nested messages and enums

* fixes namespaces for PHP dist

* fixes namespace for Descriptors, adds Cardinality and Kind

* fixes nested namespaces for reserved words and adds tests

* adds tests and generator fix for php class prefixes

* fixes escaping of protobuf packages, enum comments, misc others

* nice refactor of generated code

* adds class files for backwards compatibility

* simplifies code with templates

* adds compatibility files to makefile

* cleanup of generator and fixes nested namespace bug

* regenerates proto types

* remove internal BC classes

* adds deprecated warning, adds methods back

* simplifies if statement

* fixes dist files

* addresses review comments

* adds back TYPE_URL_PREFIX constant

* adds @deprecated to old nested class files

* skips tests which require a separate process when protobuf.so is enabled

* Adds tests for legacy nested classes that do not require separate processes to test

* uses legacy names for GPBUtil message check

* adds block for IDE @deprecated message

* Namespace for nested message/enum in c extension

* Remove unused code

1 files changed, 2 insertions, 1 deletions

diff --git a/tests.sh b/tests.sh
index 5fec74c0..da607281 100755
--- a/tests.sh
+++ b/tests.sh
@@ -107,7 +107,7 @@ build_csharp() {
   # Check that the protos haven't broken C# codegen.
   # TODO(jonskeet): Fail if regenerating creates any changes.
   csharp/generate_protos.sh
-  
+
   csharp/buildall.sh
   cd conformance && make test_csharp && cd ..
 
@@ -352,6 +352,7 @@ generate_php_test_proto() {
   rm -rf generated
   mkdir generated
   ../../src/protoc --php_out=generated         \
+    proto/empty/echo.proto                     \
     proto/test.proto                           \
     proto/test_include.proto                   \
     proto/test_no_namespace.proto              \