From 985280c388f3d0aed1f8eb1238ec5d056a7221fa Mon Sep 17 00:00:00 2001
From: Graham Esau <gesau@hotmail.co.uk>
Date: Sun, 17 May 2020 10:16:30 +0100
Subject: [PATCH] Make schemars_derive optional

---
 README.md           | 1 +
 docs/4-features.md  | 1 +
 schemars/Cargo.toml | 8 ++++++--
 schemars/src/lib.rs | 2 ++
 4 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index cdcb181..750ea48 100644
--- a/README.md
+++ b/README.md
@@ -203,6 +203,7 @@ fn main() {
 `#[serde(...)]` attributes can be overriden using `#[schemars(...)]` attributes, which behave identically (e.g. `#[schemars(rename_all = "camelCase")]`). You may find this useful if you want to change the generated schema without affecting Serde's behaviour, or if you're just not using Serde.
 
 ## Feature Flags
+- `derive` (enabled by default) - provides `#[derive(JsonSchema)]` macro
 - `impl_json_schema` - implements `JsonSchema` for Schemars types themselves
 
 ## Optional Dependencies
diff --git a/docs/4-features.md b/docs/4-features.md
index 04bb95a..6bfee2f 100644
--- a/docs/4-features.md
+++ b/docs/4-features.md
@@ -14,6 +14,7 @@ schemars = { version = "0.6", features = ["chrono"] }
 ```
 
 ## Feature Flags
+- `derive` (enabled by default) - provides `#[derive(JsonSchema)]` macro
 - `impl_json_schema` - implements `JsonSchema` for Schemars types themselves
 
 ## Optional Dependencies
diff --git a/schemars/Cargo.toml b/schemars/Cargo.toml
index 7654f19..3765820 100644
--- a/schemars/Cargo.toml
+++ b/schemars/Cargo.toml
@@ -13,7 +13,7 @@ categories = ["encoding"]
 build = "build.rs"
 
 [dependencies]
-schemars_derive = { version = "=0.7.4", path = "../schemars_derive" }
+schemars_derive = { version = "=0.7.4", optional = true, path = "../schemars_derive" }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
 
@@ -28,7 +28,11 @@ arrayvec = { version = "0.5", default-features = false, optional = true }
 pretty_assertions = "0.6.1"
 
 [features]
-impl_json_schema = []
+default = ["derive"]
+
+derive = ["schemars_derive"]
+
+impl_json_schema = ["derive"]
 # derive_json_schema will be removed in a later version
 derive_json_schema = ["impl_json_schema"]
 
diff --git a/schemars/src/lib.rs b/schemars/src/lib.rs
index b529a8f..fa545d9 100644
--- a/schemars/src/lib.rs
+++ b/schemars/src/lib.rs
@@ -197,6 +197,7 @@ fn main() {
 `#[serde(...)]` attributes can be overriden using `#[schemars(...)]` attributes, which behave identically (e.g. `#[schemars(rename_all = "camelCase")]`). You may find this useful if you want to change the generated schema without affecting Serde's behaviour, or if you're just not using Serde.
 
 ## Feature Flags
+- `derive` (enabled by default) - provides `#[derive(JsonSchema)]` macro
 - `impl_json_schema` - implements `JsonSchema` for Schemars types themselves
 
 ## Optional Dependencies
@@ -230,6 +231,7 @@ pub mod gen;
 /// JSON Schema types.
 pub mod schema;
 
+#[cfg(feature = "schemars_derive")]
 pub use schemars_derive::*;
 
 // Export serde_json so schemars_derive can use it