validate: initial constraints support. (#226)

* Import @com_lyft_protoc_gen_validate for validate.proto annotations.

* Example annotation in address.proto (BindConfig).

* Process optional/required annotations in protodoc.

Signed-off-by: Harvey Tuch <htuch@google.com>

.gitignore

@@ -1,3 +1,4 @@
 bazel-*
+*.pyc
 build_docs/
 generated/

WORKSPACE

@@ -42,6 +42,8 @@ git_repository(
     commit = "4374be38e9a75ff5957c3922adb155d32086fe14",
 )
 load("@io_bazel_rules_go//go:def.bzl", "go_rules_dependencies", "go_register_toolchains")
+load("@com_lyft_protoc_gen_validate//bazel:go_proto_library.bzl", "go_proto_repositories")
+go_proto_repositories(shared=0)
 go_rules_dependencies()
 go_register_toolchains()
 load("@io_bazel_rules_go//proto:def.bzl", "proto_register_toolchains")

api/BUILD

@@ -30,6 +30,7 @@ proto_library(
         "@com_google_protobuf//:struct_proto",
         "@com_google_protobuf//:timestamp_proto",
         "@com_google_protobuf//:wrappers_proto",
+        "@com_lyft_protoc_gen_validate//validate:validate_proto",
         "@googleapis//:http_api_protos_lib",
     ],
 )
@@ -46,6 +47,7 @@ go_grpc_library(
         "@com_github_golang_protobuf//ptypes/timestamp:go_default_library",
         "@com_github_golang_protobuf//ptypes/wrappers:go_default_library",
         "@org_golang_google_genproto//googleapis/api/annotations:go_default_library",
+        "@com_lyft_protoc_gen_validate//validate:go_default_library",
     ],
 )
 

api/address.proto

@@ -4,6 +4,8 @@ package envoy.api.v2;
 
 import "google/protobuf/wrappers.proto";
 
+import "validate/validate.proto";
+
 // protodoc-title: Network related configuration elements
 // [V2-API-DIFF] Addresses now have .proto structure.
 
@@ -37,7 +39,7 @@ message SocketAddress {
 
 message BindConfig {
   // The address to bind to when creating a socket.
-  SocketAddress source_address = 1;
+  SocketAddress source_address = 1 [(validate.rules).message.required = true];
 }
 
 // Addresses specify either a logical or physical address and port, which are

bazel/api_build_system.bzl

@@ -17,7 +17,10 @@ def api_py_proto_library(name, srcs = [], deps = [], has_services = 0):
         srcs = srcs,
         default_runtime = "@com_google_protobuf//:protobuf_python",
         protoc = "@com_google_protobuf//:protoc",
-        deps = [_PySuffix(d) for d in deps] + ["@googleapis//:http_api_protos_py"],
+        deps = [_PySuffix(d) for d in deps] + [
+            "@com_lyft_protoc_gen_validate//validate:validate_py",
+            "@googleapis//:http_api_protos_py",
+        ],
         visibility = ["//visibility:public"],
     )
 
@@ -35,6 +38,7 @@ def api_proto_library(name, srcs = [], deps = [], has_services = 0, require_py =
             "@com_google_protobuf//:timestamp_proto",
             "@com_google_protobuf//:wrappers_proto",
             "@googleapis//:http_api_protos_lib",
+            "@com_lyft_protoc_gen_validate//validate:validate_proto",
         ],
         visibility = ["//visibility:public"],
     )

bazel/repositories.bzl

@@ -1,7 +1,16 @@
 GOOGLEAPIS_SHA = "5c6df0cd18c6a429eab739fb711c27f6e1393366" # May 14, 2017
 PROMETHEUS_SHA = "6f3806018612930941127f2a7c6c453ba2c527d2" # Nov 02, 2017
 
+PGV_GIT_SHA = "f3332cbd75bb28f711377dfb84761ef0d52eca0f"
+PGV_TAR_SHA = "039ffa842eb62495b6aca305a4eb3d6dc3ac1dd056e228fba5e720161ddfb9c1"
+
 def api_dependencies():
+    native.http_archive(
+        name = "com_lyft_protoc_gen_validate",
+        strip_prefix = "protoc-gen-validate-" + PGV_GIT_SHA,
+        sha256 = PGV_TAR_SHA,
+        url = "https://github.com/lyft/protoc-gen-validate/archive/" + PGV_GIT_SHA + ".tar.gz",
+    )
     native.new_http_archive(
         name = "googleapis",
         strip_prefix = "googleapis-" + GOOGLEAPIS_SHA,

ci/do_ci.sh

@@ -17,6 +17,6 @@ elif [[ "$1" == "bazel.docs" ]]; then
   echo "generating docs..."
   ./docs/build.sh
 else
-  echo "Invalid do_ci.sh target. The only valid target is bazel.build."
+  echo "Invalid do_ci.sh target. The only valid targets are bazel.{docs,test}."
   exit 1
 fi

tools/protodoc/BUILD

@@ -3,6 +3,9 @@ licenses(["notice"])  # Apache 2
 py_binary(
     name = "protodoc",
     srcs = ["protodoc.py"],
-    deps = ["@com_google_protobuf//:protobuf_python"],
+    deps = [
+        "@com_lyft_protoc_gen_validate//validate:validate_py",
+        "@com_google_protobuf//:protobuf_python",
+    ],
     visibility = ["//visibility:public"],
 )

tools/protodoc/protodoc.py

@@ -10,6 +10,7 @@ import sys
 import re
 
 from google.protobuf.compiler import plugin_pb2
+from validate import validate_pb2
 
 # Namespace prefix for Envoy APIs.
 ENVOY_API_NAMESPACE_PREFIX = '.envoy.api.v2.'
@@ -23,6 +24,7 @@ UNICODE_INVISIBLE_SEPARATOR = u'\u2063'
 # Page/section titles with special prefixes in the proto comments
 DOC_TITLE_REGEX = 'protodoc-title:\s([^\n]+)\n\n?'
 
+
 class ProtodocError(Exception):
   """Base error class for the protodoc module."""
 
@@ -151,9 +153,11 @@ def FormatHeaderFromFile(style, file_level_comment, alt):
   m = re.search(DOC_TITLE_REGEX, file_level_comment)
   if m:
     # remove title hint and any new lines that follow
-    return FormatHeader(style, m.group(1)), re.sub(DOC_TITLE_REGEX, '', file_level_comment)
+    return FormatHeader(style, m.group(1)), re.sub(DOC_TITLE_REGEX, '',
+                                                   file_level_comment)
   return FormatHeader(style, alt), file_level_comment
 
+
 def FormatFieldTypeAsJson(type_context, field):
   """Format FieldDescriptorProto.Type as a pseudo-JSON string.
 
@@ -242,8 +246,14 @@ def FormatFieldType(type_context, field):
       field.TYPE_DOUBLE: 'double',
       field.TYPE_FLOAT: 'float',
       field.TYPE_INT32: 'int32',
+      field.TYPE_SFIXED32: 'int32',
+      field.TYPE_SINT32: 'int32',
+      field.TYPE_FIXED32: 'uint32',
       field.TYPE_UINT32: 'uint32',
       field.TYPE_INT64: 'int64',
+      field.TYPE_SFIXED64: 'int64',
+      field.TYPE_SINT64: 'int64',
+      field.TYPE_FIXED64: 'uint64',
       field.TYPE_UINT64: 'uint64',
       field.TYPE_BOOL: 'bool',
       field.TYPE_STRING: 'string',
@@ -301,8 +311,15 @@ def FormatFieldAsDefinitionListItem(type_context, field):
   else:
     oneof_comment = ''
   anchor = FormatAnchor(FieldCrossRefLabel(type_context.name))
-  comment = '(%s) ' % FormatFieldType(
+  annotations = []
-      type_context, field) + type_context.LeadingCommentPathLookup()
+  if field.options.HasExtension(validate_pb2.rules):
+    rule = field.options.Extensions[validate_pb2.rules]
+    if rule.HasField('message'):
+      if rule.message.required:
+        annotations.append('*REQUIRED*')
+  comment = '(%s) ' % ', '.join(
+      [FormatFieldType(type_context, field)] + annotations
+  ) + type_context.LeadingCommentPathLookup()
   return anchor + field.name + '\n' + MapLines(
       functools.partial(Indent, 2), comment + oneof_comment)
 
@@ -345,7 +362,8 @@ def FormatMessage(type_context, msg):
           map(
               functools.partial(FormatFieldType, type_context),
               nested_msg.field))
-      for nested_msg in msg.nested_type if nested_msg.options.map_entry
+      for nested_msg in msg.nested_type
+      if nested_msg.options.map_entry
   }
   nested_msgs = '\n'.join(
       FormatMessage(
@@ -425,15 +443,15 @@ def GenerateRst(proto_file):
   source_code_info = SourceCodeInfo(proto_file.source_code_info)
   # Find the earliest detached comment, attribute it to file level.
   # Also extract file level titles if any.
-  header, comment = FormatHeaderFromFile('=', source_code_info.file_level_comment,
+  header, comment = FormatHeaderFromFile(
-                                         proto_file.name)
+      '=', source_code_info.file_level_comment, proto_file.name)
   msgs = '\n'.join(
       FormatMessage(TypeContext(source_code_info, [4, index], msg.name), msg)
       for index, msg in enumerate(proto_file.message_type))
   enums = '\n'.join(
       FormatEnum(TypeContext(source_code_info, [5, index], enum.name), enum)
       for index, enum in enumerate(proto_file.enum_type))
-  #debug_proto = FormatProtoAsBlockComment(proto_file.source_code_info)
+  debug_proto = FormatProtoAsBlockComment(proto_file)
   return header + comment + msgs + enums #+ debug_proto