Refactor!: Introduce a Cargo feature for optional Hyper 0 support

Closes #294. Requires breaking changes, but only regarding the `hyper1`
feature's enabled module path; the default v0 is still preserved. What
is proposed here in order to achieve the objective is to have both
modules be re-exported when the other feature is not enabled, and have
them be made public when both features are enabled at the same time.
This way, the features should be kept additive: all four combinations
are supported. It enables dependency de-duplication when consuming it.

Signed-off-by: Paul Mabileau <paul.mabileau@harfanglab.fr>

.github/workflows/ci.yml

@@ -366,5 +366,7 @@ jobs:
       name: Run `rpk,underscore-wildcards` tests
     - run: cargo test --features pq-experimental,rpk,underscore-wildcards
       name: Run `pq-experimental,rpk,underscore-wildcards` tests
+    - run: cargo test -p hyper-boring --features hyper0
+      name: Run hyper 0. tests for hyper-boring
     - run: cargo test -p hyper-boring --features hyper1
       name: Run hyper 1.0 tests for hyper-boring

Cargo.toml

@@ -39,10 +39,10 @@ anyhow = "1"
 antidote = "1.0.0"
 http = "1"
 http-body-util = "0.1.2"
-http_old = { package = "http", version = "0.2" }
-hyper = "1"
+http0 = { package = "http", version = "0.2" }
+hyper1 = { package = "hyper", version = "1" }
 hyper-util = "0.1.6"
-hyper_old = { package = "hyper", version = "0.14", default-features = false }
+hyper0 = { package = "hyper", version = "0.14", default-features = false }
 linked_hash_set = "0.1"
 once_cell = "1.0"
 openssl-macros = "0.1.1"

hyper-boring/Cargo.toml

@@ -15,9 +15,10 @@ features = ["pq-experimental"]
 rustdoc-args = ["--cfg", "docsrs"]
 
 [features]
-default = ["runtime"]
+default = ["runtime", "hyper0-runtime"]
 
-runtime = ["hyper_old/runtime"]
+runtime = []
+hyper0-runtime = ["hyper0", "hyper0/runtime"]
 
 # Use a FIPS-validated version of boringssl.
 fips = ["tokio-boring/fips"]
@@ -28,16 +29,18 @@ fips-link-precompiled = ["tokio-boring/fips-link-precompiled"]
 # Enables experimental post-quantum crypto (https://blog.cloudflare.com/post-quantum-for-all/)
 pq-experimental = ["tokio-boring/pq-experimental"]
 
-# Enable Hyper 1 support
-hyper1 = ["dep:http", "dep:hyper", "dep:hyper-util", "dep:tower-service"]
+# Enable Hyper 0 support.
+hyper0 = ["dep:hyper0", "dep:http0"]
+# Enable Hyper 1 support.
+hyper1 = ["dep:http", "dep:hyper1", "dep:hyper-util", "dep:tower-service"]
 
 [dependencies]
 antidote = { workspace = true }
 http = { workspace = true, optional = true }
-http_old = { workspace = true }
-hyper = { workspace = true, optional = true }
+http0 = { workspace = true, optional = true }
+hyper1 = { workspace = true, optional = true }
 hyper-util = { workspace = true, optional = true, features = ["client", "client-legacy"] }
-hyper_old = { workspace = true, features = ["client"] }
+hyper0 = { workspace = true, optional = true, features = ["client"] }
 linked_hash_set = { workspace = true }
 once_cell = { workspace = true }
 boring = { workspace = true }
@@ -50,8 +53,8 @@ tower-service = { workspace = true, optional = true }
 bytes = { workspace = true }
 http-body-util = { workspace = true }
 hyper-util = { workspace = true, features = ["http1", "http2", "service", "tokio"] }
-hyper = { workspace = true, features = ["server"] }
-hyper_old = { workspace = true, features = [ "full" ] }
+hyper1 = { workspace = true, features = ["server"] }
+hyper0 = { workspace = true, features = [ "full" ] }
 tokio = { workspace = true, features = [ "full" ] }
 tower = { workspace = true, features = ["util"] }
 futures = { workspace = true }

hyper-boring/src/lib.rs

@@ -11,12 +11,21 @@ use std::fmt;
 use tokio_boring::SslStream;
 
 mod cache;
+#[cfg(all(feature = "hyper0", not(feature = "hyper1")))]
 mod v0;
+/// Hyper 0 support.
+#[cfg(all(feature = "hyper0", feature = "hyper1"))]
+pub mod v0;
+#[cfg(all(feature = "hyper1", not(feature = "hyper0")))]
+mod v1;
 /// Hyper 1 support.
-#[cfg(feature = "hyper1")]
+#[cfg(all(feature = "hyper1", feature = "hyper0"))]
 pub mod v1;
 
+#[cfg(all(feature = "hyper0", not(feature = "hyper1")))]
 pub use self::v0::*;
+#[cfg(all(feature = "hyper1", not(feature = "hyper0")))]
+pub use self::v1::*;
 
 fn key_index() -> Result<Index<Ssl, SessionKey>, ErrorStack> {
     static IDX: OnceCell<Index<Ssl, SessionKey>> = OnceCell::new();

hyper-boring/src/v0.rs

@@ -6,11 +6,11 @@ use boring::ssl::{
     ConnectConfiguration, Ssl, SslConnector, SslConnectorBuilder, SslMethod, SslRef,
     SslSessionCacheMode,
 };
-use http_old::uri::Scheme;
-use hyper_old::client::connect::{Connected, Connection};
-use hyper_old::client::HttpConnector;
-use hyper_old::service::Service;
-use hyper_old::Uri;
+use http0::uri::Scheme;
+use hyper0::client::connect::{Connected, Connection};
+use hyper0::client::HttpConnector;
+use hyper0::service::Service;
+use hyper0::Uri;
 use std::error::Error;
 use std::future::Future;
 use std::net;

hyper-boring/src/v1.rs

@@ -8,7 +8,7 @@ use boring::ssl::{
 };
 use http::uri::Scheme;
 use http::Uri;
-use hyper::rt::{Read, ReadBufCursor, Write};
+use hyper1::rt::{Read, ReadBufCursor, Write};
 use hyper_util::client::legacy::connect::{Connected, Connection, HttpConnector};
 use hyper_util::rt::TokioIo;
 use std::error::Error;

hyper-boring/tests/v0.rs

@@ -1,10 +1,15 @@
+#![cfg(feature = "hyper0")]
+
 use boring::ssl::{SslAcceptor, SslConnector, SslFiletype, SslMethod};
 use futures::StreamExt;
+use hyper0::client::HttpConnector;
+use hyper0::server::conn::Http;
+use hyper0::{service, Response};
+use hyper0::{Body, Client};
+#[cfg(feature = "hyper1")]
+use hyper_boring::v0::HttpsConnector;
+#[cfg(not(feature = "hyper1"))]
 use hyper_boring::HttpsConnector;
-use hyper_old::client::HttpConnector;
-use hyper_old::server::conn::Http;
-use hyper_old::{service, Response};
-use hyper_old::{Body, Client};
 use std::convert::Infallible;
 use std::{io, iter};
 use tokio::net::TcpListener;

hyper-boring/tests/v1.rs

@@ -4,8 +4,11 @@ use boring::ssl::{SslAcceptor, SslConnector, SslFiletype, SslMethod};
 use bytes::Bytes;
 use futures::StreamExt;
 use http_body_util::{BodyStream, Empty};
-use hyper::{service, Response};
+use hyper1::{service, Response};
+#[cfg(feature = "hyper0")]
 use hyper_boring::v1::HttpsConnector;
+#[cfg(not(feature = "hyper0"))]
+use hyper_boring::HttpsConnector;
 use hyper_util::client::legacy::connect::HttpConnector;
 use hyper_util::client::legacy::Client;
 use hyper_util::rt::{TokioExecutor, TokioIo};
@@ -55,7 +58,7 @@ async fn localhost() {
                 Ok::<_, io::Error>(Response::new(<Empty<Bytes>>::new()))
             });
 
-            hyper::server::conn::http1::Builder::new()
+            hyper1::server::conn::http1::Builder::new()
                 .keep_alive(false)
                 .serve_connection(TokioIo::new(stream), service)
                 .await
@@ -126,7 +129,7 @@ async fn alpn_h2() {
             Ok::<_, io::Error>(Response::new(<Empty<Bytes>>::new()))
         });
 
-        hyper::server::conn::http2::Builder::new(TokioExecutor::new())
+        hyper1::server::conn::http2::Builder::new(TokioExecutor::new())
             .serve_connection(TokioIo::new(stream), service)
             .await
             .unwrap();