Remove and feature-gate dependencies

Cargo.toml

@@ -14,7 +14,9 @@ categories = ["network-programming", "asynchronous"]
 readme = "README.md"
 
 [features]
-default = ["bson", "url", "chrono-tz"]
+default = ["apollo_tracing", "bson", "chrono", "chrono-tz", "log", "multipart", "tracing", "url"]
+apollo_tracing = ["chrono"]
+multipart = ["multer", "bytes", "tempfile"]
 
 [dependencies]
 async-graphql-derive = { path = "derive", version = "2.0.0-alpha.6" }
@@ -22,33 +24,30 @@ async-graphql-parser = { path = "parser", version = "2.0.0-alpha.6" }
 
 async-stream = "0.3"
 async-trait = "0.1.30"
-bytes = "0.5.4"
-chrono = "0.4.10"
 fnv = "1.0.6"
 futures = "0.3.5"
-http = "0.2.1"
-httparse = "1.3.4"
 indexmap = "1.3.2"
 itertools = "0.9.0"
-log = "0.4.8"
-multer = "1.2.2"
 once_cell = "1.3.1"
-parking_lot = "0.10.0"
+pin-project-lite = "0.1.7"
 regex = "1.3.5"
 serde = { version = "1.0.104", features = ["derive"] }
 serde_json = "1.0.48"
-slab = "0.4.2"
 spin = "0.5.2"
-tempfile = "3.1.0"
 thiserror = "1.0.11"
-tracing = "0.1.13"
-pin-project-lite = "0.1.7"
 uuid = { version = "0.8.1", features = ["v4", "serde"] }
 
+# Feature optional dependencies
 bson = { version = "1.0.0", optional = true }
-url = { version = "2.1.1", optional = true }
+chrono = { version = "0.4.15", optional = true }
 chrono-tz = { version = "0.5.1", optional = true }
+log = { version = "0.4.11", optional = true }
+tracing = { version = "0.1.19", optional = true }
+url = { version = "2.1.1", optional = true }
 
+bytes = { version = "0.5.4", optional = true }
+multer = { version = "1.2.2", optional = true }
+tempfile = { version = "3.1.0", optional = true }
 
 [dev-dependencies]
 async-std = { version = "1.5.0", features = ["attributes"] }

src/error.rs

@@ -330,6 +330,7 @@ pub enum ParseRequestError {
 
     /// The request's multipart data was invalid.
     #[error("Invalid multipart data")]
+    #[cfg(feature = "multipart")]
     InvalidMultipart(multer::Error),
 
     /// Missing "operators" part for multipart request.
@@ -353,6 +354,7 @@ pub enum ParseRequestError {
     PayloadTooLarge,
 }
 
+#[cfg(feature = "multipart")]
 impl From<multer::Error> for ParseRequestError {
     fn from(err: multer::Error) -> Self {
         match err {

src/extensions/apollo_tracing.rs

@@ -46,8 +46,11 @@ impl Serialize for ResolveStat {
 
 /// Apollo tracing extension for performance tracing
 ///
-/// Apollo Tracing works by including data in the extensions field of the GraphQL response, which is reserved by the GraphQL spec for extra information that a server wants to return. That way, you have access to performance traces alongside the data returned by your query.
-/// It’s already supported by `Apollo Engine`, and we’re excited to see what other kinds of integrations people can build on top of this format.
+/// Apollo Tracing works by including data in the extensions field of the GraphQL response, which is
+/// reserved by the GraphQL spec for extra information that a server wants to return. That way, you
+/// have access to performance traces alongside the data returned by your query.
+/// It's already supported by `Apollo Engine`, and we're excited to see what other kinds of
+/// integrations people can build on top of this format.
 pub struct ApolloTracing {
     start_time: DateTime<Utc>,
     end_time: DateTime<Utc>,

src/extensions/mod.rs

@@ -1,14 +1,20 @@
 //! Extensions for schema
 
+#[cfg(feature = "apollo_tracing")]
 mod apollo_tracing;
+#[cfg(feature = "log")]
 mod logger;
+#[cfg(feature = "tracing")]
 mod tracing;
 
 use crate::context::{QueryPathNode, ResolveId};
 use crate::{Context, Result, Variables};
 
+#[cfg(feature = "apollo_tracing")]
 pub use self::apollo_tracing::ApolloTracing;
+#[cfg(feature = "log")]
 pub use self::logger::Logger;
+#[cfg(feature = "tracing")]
 pub use self::tracing::Tracing;
 use crate::parser::types::ExecutableDocument;
 use crate::Error;

src/http/mod.rs

@@ -1,11 +1,13 @@
 //! A helper module that supports HTTP
 
 mod graphiql_source;
+#[cfg(feature = "multipart")]
 mod multipart;
 mod playground_source;
 pub mod websocket;
 
 pub use graphiql_source::graphiql_source;
+#[cfg(feature = "multipart")]
 pub use multipart::{receive_multipart, MultipartOptions};
 pub use playground_source::{playground_source, GraphQLPlaygroundConfig};
 
@@ -19,14 +21,15 @@ pub async fn receive_body(
     body: impl AsyncRead + Send + 'static,
     opts: MultipartOptions,
 ) -> Result<Request, ParseRequestError> {
+    #[cfg(feature = "multipart")]
     if let Some(Ok(boundary)) = content_type.map(multer::parse_boundary) {
-        receive_multipart(body, boundary, opts).await
-    } else {
-        let mut data = Vec::new();
-        futures::pin_mut!(body);
-        body.read_to_end(&mut data)
-            .await
-            .map_err(ParseRequestError::Io)?;
-        Ok(serde_json::from_slice::<Request>(&data).map_err(ParseRequestError::InvalidRequest)?)
+        return receive_multipart(body, boundary, opts).await;
     }
+
+    let mut data = Vec::new();
+    futures::pin_mut!(body);
+    body.read_to_end(&mut data)
+        .await
+        .map_err(ParseRequestError::Io)?;
+    Ok(serde_json::from_slice::<Request>(&data).map_err(ParseRequestError::InvalidRequest)?)
 }

src/types/external/bson.rs

@@ -1,6 +1,9 @@
 use crate::{GQLScalar, InputValueError, InputValueResult, ScalarType, Value};
-use bson::{oid::ObjectId, DateTime as UtcDateTime};
+use bson::oid::ObjectId;
+#[cfg(feature = "chrono")]
 use chrono::{DateTime, Utc};
+#[cfg(feature = "chrono")]
+use bson::DateTime as UtcDateTime;
 
 #[GQLScalar(internal)]
 impl ScalarType for ObjectId {
@@ -16,6 +19,7 @@ impl ScalarType for ObjectId {
     }
 }
 
+#[cfg(feature = "chrono")]
 #[GQLScalar(internal, name = "DateTime")]
 impl ScalarType for UtcDateTime {
     fn parse(value: Value) -> InputValueResult<Self> {

src/types/external/mod.rs

@@ -14,6 +14,10 @@ mod uuid;
 
 #[cfg(feature = "bson")]
 mod bson;
+#[cfg(feature = "chrono")]
+mod datetime;
+#[cfg(feature = "chrono")]
+mod naive_time;
 #[cfg(feature = "chrono_tz")]
 mod chrono_tz;
 #[cfg(feature = "url")]