Grpc-Gateway Rules

Rule	Description
grpc_gateway_proto_repositories	Load WORKSPACE dependencies.
grpc_gateway_proto_compile	Generate protobuf source files.
grpc_gateway_proto_library	Generate and compiles protobuf source files.
grpc_gateway_swagger_compile	Generate swwagger.json source files.

grpc_gateway_proto_repositories

Enable grpc-gateway support by loading the dependencies in your workspace.

IMPORTANT: This should occur after loading rules_go.

load("@org_pubref_rules_protobuf//grpc_gateway:rules.bzl", "grpc_gateway_proto_repositories")
grpc_gateway_proto_repositories()

grpc_gateway_proto_compile

This is a thin wrapper over the proto_compile rule having language @org_pubref_rules_protobuf//grpc_gateway.

load("@org_pubref_rules_protobuf//grpc_gateway:rules.bzl", "grpc_gateway_proto_compile")

grpc_gateway_proto_compile(
  name = "protos",
  protos = ["message.proto"],
)

$ bazel build :protos
Target //:protos up-to-date:
  bazel-genfiles/message.pb.gw.go

grpc_gateway_proto_library

Pass the set of protobuf source files to the protos attribute.

load("@org_pubref_rules_protobuf//grpc_gateway:rules.bzl", "grpc_gateway_proto_library")

grpc_gateway_proto_library(
  name = "protolib",
  protos = ["message.proto"],
)

$ bazel build :protolib
Target //:protolib up-to-date:
  bazel-bin/protolib.a

To get the list of required compile-time dependencies in other contexts for grpc-related code, load the list from the rules.bzl file:

load("@org_pubref_rules_protobuf//grpc_gateway:rules.bzl", "GRPC_COMPILE_DEPS")

go_binary(
  name = "gateway",
  srcs = ["main.go"],
  deps = [
    ":protolib"
  ] + GRPC_COMPILE_DEPS,
)

In this case main.go should implement the http entrypoint for the grpc-gateway as described.

This rule includes all common _library attributes in addition to:

Name	Type	Description	Default
log_level	int	Logging threshold level.	0
log_dir	string	Log directory pathname.	""
log_backtrace_at	int	See grpc_gateway docs.	0
logtostderr	boolean	Emit logging to stderr instead of a log file.	True
alsologtostderr	boolean	Emit logging to stderr in addition to the log file.	False
stderrthreshold	boolean	Emit logging to stderr rather than a file.	True
stderrthreshold	int	See grpc_gateway docs.	0
log_backtrace_at	int	See grpc_gateway docs.	0
request_context	boolean	See grpc_gateway docs.	False

grpc_gateway_binary

The shortcut rule for the above is the grpc_gateway_binary rule:

grpc_gateway_binary(
  name = "gateway",
  srcs = ["main.go"],
  protos = [message.proto],
)

grpc_gateway_swagger_compile

The grpc_gateway_swagger_compile rule can be used to generate *.swagger.json outputs:

load("@org_pubref_rules_protobuf//grpc_gateway:rules.bzl", "grpc_gateway_swagger_compile")

grpc_gateway_swagger_compile(
  name = "swagger",
  protos = ["message.proto"],
)

$ bazel build :swagger
Target //:protos up-to-date:
  bazel-genfiles/message.swagger.json

Consult source files in the examples/helloworld/grpc_gateway directory for additional information.