Force runtime feature selection

ntex-rt/CHANGES.md

@@ -1,6 +1,10 @@
 # Changes
 
-## [0.4.18] - 2024-09-xx
+## [0.4.19] - 2024-10-11
+
+* Force runtime feature selection
+
+## [0.4.18] - 2024-09-24
 
 * Update to glommio v0.9
 

ntex-rt/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "ntex-rt"
-version = "0.4.18"
+version = "0.4.19"
 authors = ["ntex contributors <team@ntex.rs>"]
 description = "ntex runtime"
 keywords = ["network", "framework", "async", "futures"]
@@ -9,6 +9,7 @@ repository = "https://github.com/ntex-rs/ntex.git"
 documentation = "https://docs.rs/ntex-rt/"
 categories = ["network-programming", "asynchronous"]
 license = "MIT OR Apache-2.0"
+build = "build.rs"
 edition = "2021"
 
 [lib]

ntex-rt/build.rs

@@ -0,0 +1,24 @@
+use std::{collections::HashSet, env};
+
+fn main() {
+    let mut features = HashSet::<&'static str>::default();
+
+    for (key, _val) in env::vars() {
+        let _ = match key.as_ref() {
+            "CARGO_FEATURE_COMPIO" => features.insert("compio"),
+            "CARGO_FEATURE_TOKIO" => features.insert("tokio"),
+            "CARGO_FEATURE_GLOMMIO" => features.insert("glommio"),
+            "CARGO_FEATURE_ASYNC_STD" => features.insert("async-std"),
+            _ => false,
+        };
+    }
+
+    if features.is_empty() {
+        panic!("Runtime must be selected, available options are \"compio\", \"tokio\", \"async-std\", \"glommio\"");
+    } else if features.len() > 1 {
+        panic!(
+            "Only one runtime feature could be selected, current selection {:?}",
+            features
+        );
+    }
+}

ntex-rt/src/lib.rs

@@ -461,99 +461,11 @@ mod glommio {
 #[cfg(feature = "tokio")]
 pub use self::tokio::*;
 
-#[cfg(all(
+#[cfg(feature = "async-std")]
-    not(feature = "tokio"),
-    not(feature = "compio"),
-    not(feature = "glommio"),
-    feature = "async-std",
-))]
 pub use self::asyncstd::*;
 
-#[cfg(all(
+#[cfg(feature = "glommio")]
-    not(feature = "tokio"),
-    not(feature = "compio"),
-    not(feature = "async-std"),
-    feature = "glommio"
-))]
 pub use self::glommio::*;
 
-#[cfg(all(
+#[cfg(feature = "compio")]
-    not(feature = "tokio"),
-    not(feature = "glommio"),
-    not(feature = "async-std"),
-    feature = "compio"
-))]
 pub use self::compio::*;
-
-#[allow(dead_code)]
-#[cfg(all(
-    not(feature = "tokio"),
-    not(feature = "async-std"),
-    not(feature = "compio"),
-    not(feature = "glommio")
-))]
-mod no_rt {
-    use std::task::{Context, Poll};
-    use std::{fmt, future::Future, marker::PhantomData, pin::Pin};
-
-    /// Runs the provided future, blocking the current thread until the future
-    /// completes.
-    pub fn block_on<F: Future<Output = ()>>(_: F) {
-        panic!("async runtime is not configured");
-    }
-
-    pub fn spawn<F>(_: F) -> JoinHandle<F::Output>
-    where
-        F: Future + 'static,
-    {
-        unimplemented!()
-    }
-
-    pub fn spawn_blocking<F, T>(_: F) -> JoinHandle<T>
-    where
-        F: FnOnce() -> T + Send + Sync + 'static,
-        T: Send + 'static,
-    {
-        unimplemented!()
-    }
-
-    /// Blocking operation completion future. It resolves with results
-    /// of blocking function execution.
-    #[allow(clippy::type_complexity)]
-    pub struct JoinHandle<T> {
-        t: PhantomData<T>,
-    }
-
-    impl<T> JoinHandle<T> {
-        pub fn is_finished(&self) -> bool {
-            true
-        }
-    }
-
-    impl<T> Future for JoinHandle<T> {
-        type Output = Result<T, JoinError>;
-
-        fn poll(self: Pin<&mut Self>, _: &mut Context<'_>) -> Poll<Self::Output> {
-            todo!()
-        }
-    }
-
-    #[derive(Debug, Copy, Clone)]
-    pub struct JoinError;
-
-    impl fmt::Display for JoinError {
-        fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-            write!(f, "JoinError")
-        }
-    }
-
-    impl std::error::Error for JoinError {}
-}
-
-#[cfg(all(
-    not(feature = "tokio"),
-    not(feature = "async-std"),
-    not(feature = "compio"),
-    not(feature = "glommio")
-))]
-pub use self::no_rt::*;

ntex/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "ntex"
-version = "2.6.0"
+version = "2.7.0"
 authors = ["ntex contributors <team@ntex.rs>"]
 description = "Framework for composable network services"
 readme = "README.md"