add derive macro for resource

gotham_restful/Cargo.toml

@@ -21,6 +21,7 @@ failure = "0.1"
 futures = "0.1"
 gotham = "0.4"
 gotham_derive = "0.4"
+gotham_restful_derive = { path = "../gotham_restful_derive" }
 hyper = "0.12"
 indexmap = { version = "1.0", optional = true }
 log = { version = "0.4", optional = true }
@@ -30,5 +31,5 @@ serde = { version = "1", features = ["derive"] }
 serde_json = "1"
 
 [features]
-default = ["openapi", "chrono"]
-openapi = ["indexmap", "log", "openapiv3"]
+default = []
+openapi = ["gotham_restful_derive/openapi", "indexmap", "log", "openapiv3"]

gotham_restful/src/lib.rs

@@ -4,6 +4,17 @@
 pub use hyper::StatusCode;
 use serde::{de::DeserializeOwned, Serialize};
 
+pub use gotham_restful_derive::*;
+/// Not public API
+#[doc(hidden)]
+pub mod export
+{
+	#[cfg(feature = "openapi")]
+	pub use indexmap::IndexMap;
+	#[cfg(feature = "openapi")]
+	pub use openapiv3;
+}
+
 pub mod helper;
 
 #[cfg(feature = "openapi")]

gotham_restful/src/openapi/types.rs

@@ -5,8 +5,10 @@ use chrono::{
 use indexmap::IndexMap;
 use openapiv3::{
 	ArrayType, IntegerType, NumberType, ObjectType, ReferenceOr::Item, ReferenceOr::Reference, Schema,
-	SchemaData, SchemaKind, StringFormat, StringType, Type, VariantOrUnknownOrEmpty
+	SchemaData, SchemaKind, StringType, Type
 };
+#[cfg(feature = "chrono")]
+use openapiv3::{StringFormat, VariantOrUnknownOrEmpty};
 
 #[derive(Debug, Clone, PartialEq)]
 pub struct OpenapiSchema