feat: add derive feature (#992)

Cargo.toml

@@ -42,8 +42,9 @@ exclude = [
 bench = false
 
 [features]
-default = ["prost-derive", "std"]
-prost-derive = ["dep:prost-derive"]
+default = ["derive", "std"]
+derive = ["dep:prost-derive"]
+prost-derive = ["derive"]     # deprecated, please use derive feature instead
 no-recursion-limit = []
 std = []
 

src/lib.rs

@@ -86,10 +86,10 @@ where
 // Based on serde's equivalent re-export [1], but enabled by default.
 //
 // [1]: https://github.com/serde-rs/serde/blob/v1.0.89/serde/src/lib.rs#L245-L256
-#[cfg(feature = "prost-derive")]
+#[cfg(feature = "derive")]
 #[allow(unused_imports)]
 #[macro_use]
 extern crate prost_derive;
-#[cfg(feature = "prost-derive")]
+#[cfg(feature = "derive")]
 #[doc(hidden)]
 pub use prost_derive::*;

tests-no-std/Cargo.toml

@@ -24,7 +24,7 @@ path = "../tests/src/lib.rs"
 anyhow = { version = "1.0.45", default-features = false }
 bytes = { version = "1", default-features = false }
 cfg-if = "1"
-prost = { path = "..", default-features = false, features = ["prost-derive"] }
+prost = { path = "..", default-features = false, features = ["derive"] }
 prost-types = { path = "../prost-types", default-features = false }
 protobuf = { path = "../protobuf" }