sndio: test CI with linux-sndio feature

.github/workflows/cpal.yml

@@ -82,6 +82,17 @@ jobs:
       run: sudo apt-get install libasound2-dev
     - name: Install libjack
       run: sudo apt-get install libjack-jackd2-dev libjack-jackd2-0
+    - name: Install sndio
+      run: |
+        sudo apt-get install build-essential &&
+        git clone https://caoua.org/git/sndio &&
+        cd sndio &&
+        ./configure &&
+        make &&
+        sudo mkdir /var/run/sndiod &&
+        sudo useradd -r -g audio -s /sbin/nologin -d /var/run/sndiod sndiod &&
+        sudo make install &&
+        sudo ldconfig 
     - name: Install stable
       uses: actions-rs/toolchain@v1
       with:
@@ -98,6 +109,11 @@ jobs:
       with:
         command: test
         args: --all --all-features --verbose
+    - name: Run with jack feature
+      uses: actions-rs/cargo@v1
+      with:
+        command: test
+        args: --all --features jack --verbose
 
   linux-check-and-test-armv7:
     runs-on: ubuntu-latest

Cargo.toml

@@ -10,6 +10,7 @@ keywords = ["audio", "sound"]
 
 [features]
 asio = ["asio-sys", "num-traits"] # Only available on Windows. See README for setup instructions.
+linux-sndio = ["sndio-sys", "libc"]  # sndio on Linux (normally this is only used on OpenBSD)
 
 [dependencies]
 thiserror = "1.0.2"
@@ -34,6 +35,10 @@ libc = "0.2.65"
 parking_lot = "0.11"
 jack = { version = "0.6.5", optional = true }
 
+[target.'cfg(target_os = "linux")'.dependencies]
+sndio-sys = { version = "0.0.*", optional = true }
+libc = { version = "0.2.65", optional = true }
+
 [target.'cfg(target_os = "openbsd")'.dependencies]
 sndio-sys = "0.0.*"
 libc = "0.2.65"

src/host/mod.rs

@@ -14,7 +14,10 @@ pub(crate) mod jack;
 pub(crate) mod null;
 #[cfg(target_os = "android")]
 pub(crate) mod oboe;
-#[cfg(target_os = "openbsd")]
+#[cfg(any(
+    target_os = "openbsd",
+    and(target_os = "linux", feature = "linux-sndio")
+))]
 pub(crate) mod sndio;
 #[cfg(windows)]
 pub(crate) mod wasapi;

src/platform/mod.rs

@@ -448,30 +448,50 @@ macro_rules! impl_platform_host {
 // TODO: Add pulseaudio and jack here eventually.
 #[cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd"))]
 mod platform_impl {
+    #[cfg(not(feature = "linux-sndio"))]
     pub use crate::host::alsa::{
         Device as AlsaDevice, Devices as AlsaDevices, Host as AlsaHost, Stream as AlsaStream,
         SupportedInputConfigs as AlsaSupportedInputConfigs,
         SupportedOutputConfigs as AlsaSupportedOutputConfigs,
     };
-    #[cfg(feature = "jack")]
+    #[cfg(and(feature = "jack", not(feature = "linux-sndio")))]
     pub use crate::host::jack::{
         Device as JackDevice, Devices as JackDevices, Host as JackHost, Stream as JackStream,
         SupportedInputConfigs as JackSupportedInputConfigs,
         SupportedOutputConfigs as JackSupportedOutputConfigs,
     };
 
-    #[cfg(feature = "jack")]
+    #[cfg(and(feature = "jack", not(feature = "linux-sndio")))]
     impl_platform_host!(Jack jack "JACK", Alsa alsa "ALSA");
 
-    #[cfg(not(feature = "jack"))]
+    #[cfg(and(not(feature = "jack"), not(feature = "linux-sndio")))]
     impl_platform_host!(Alsa alsa "ALSA");
 
     /// The default host for the current compilation target platform.
+    #[cfg(not(feature = "linux-sndio"))]
     pub fn default_host() -> Host {
         AlsaHost::new()
             .expect("the default host should always be available")
             .into()
     }
+
+    #[cfg(feature = "linux-sndio")]
+    pub use crate::host::sndio::{
+        Device as SndioDevice, Devices as SndioDevices, Host as SndioHost, Stream as SndioStream,
+        SupportedInputConfigs as SndioSupportedInputConfigs,
+        SupportedOutputConfigs as SndioSupportedOutputConfigs,
+    };
+
+    #[cfg(feature = "linux-sndio")]
+    impl_platform_host!(Sndio sndio "sndio");
+
+    /// The default host for the current compilation target platform.
+    #[cfg(feature = "linux-sndio")]
+    pub fn default_host() -> Host {
+        SndioHost::new()
+            .expect("the default host should always be available")
+            .into()
+    }
 }
 
 #[cfg(target_os = "openbsd")]