Make sipper dependency optional

Author: hecrj

Cargo.lock

@@ -67,11 +67,14 @@ auto-detect-theme = ["iced_core/auto-detect-theme"]
 strict-assertions = ["iced_renderer/strict-assertions"]
 # Redraws on every runtime event, and not only when a widget requests it
 unconditional-rendering = ["iced_winit/unconditional-rendering"]
+# Enables support for the `sipper` library
+sipper = ["iced_runtime/sipper"]
 
 [dependencies]
 iced_core.workspace = true
 iced_futures.workspace = true
 iced_renderer.workspace = true
+iced_runtime.workspace = true
 iced_widget.workspace = true
 iced_winit.features = ["program"]
 iced_winit.workspace = true

Cargo.toml

@@ -23,5 +23,7 @@ iced_core.workspace = true
 iced_futures.workspace = true
 
 raw-window-handle.workspace = true
-sipper.workspace = true
 thiserror.workspace = true
+
+sipper.workspace = true
+sipper.optional = true

runtime/Cargo.toml

@@ -7,8 +7,10 @@ use crate::futures::futures::future::{self, FutureExt};
 use crate::futures::futures::stream::{self, Stream, StreamExt};
 use crate::futures::{BoxStream, MaybeSend, boxed_stream};
 
+use std::convert::Infallible;
 use std::sync::Arc;
 
+#[cfg(feature = "sipper")]
 #[doc(no_inline)]
 pub use sipper::{Never, Sender, Sipper, Straw, sipper, stream};
 
@@ -60,6 +62,7 @@ impl<T> Task<T> {
 
     /// Creates a [`Task`] that runs the given [`Sipper`] to completion, mapping
     /// progress with the first closure and the output with the second one.
+    #[cfg(feature = "sipper")]
     pub fn sip<S>(
         sipper: S,
         on_progress: impl FnMut(S::Progress) -> T + MaybeSend + 'static,
@@ -391,7 +394,7 @@ where
 }
 
 /// Creates a new [`Task`] that executes the given [`Action`] and produces no output.
-pub fn effect<T>(action: impl Into<Action<Never>>) -> Task<T> {
+pub fn effect<T>(action: impl Into<Action<Infallible>>) -> Task<T> {
     let action = action.into();
 
     Task(Some(boxed_stream(stream::once(async move {