remaining feature flags

AGENTS.md

@@ -28,7 +28,7 @@ Lan Mouse is an open-source Software KVM sharing mouse/keyboard input across loc
 
 ## Feature & cfg discipline
 
-- Feature flags live in root `Cargo.toml`. Gate OS-specific modules with tight cfgs (e.g., `cfg(all(unix, feature = "layer_shell", not(target_os = "macos")))`).
+- Feature flags live in root `Cargo.toml`. Gate OS-specific modules with the configs exported in build.rs (e.g., `cfg(layer_shell)`).
 - Prefer module-level gating over per-function cfgs to avoid empty stubs.
 - New backends: add feature in `Cargo.toml`, create gated module, log backend selection.
 

build.rs

@@ -5,4 +5,57 @@ fn main() {
         .deny_const(Default::default())
         .build()
         .expect("shadow build");
+
+    let unix = cfg!(unix);
+    let macos = cfg!(target_os = "macos");
+
+    let layer_shell_capture = cfg!(feature = "layer_shell_capture");
+    let libei_capture = cfg!(feature = "libei_capture");
+    let x11_capture = cfg!(feature = "x11_capture");
+
+    let libei_emulation = cfg!(feature = "libei_emulation");
+    let x11_emulation = cfg!(feature = "x11_emulation");
+    let wlroots_emulation = cfg!(feature = "wlroots_emulation");
+    let rdp_emulation = cfg!(feature = "rdp_emulation");
+
+    let layer_shell_capture = unix && !macos && layer_shell_capture;
+    let libei_capture = unix && !macos && libei_capture;
+    let x11_capture = unix && !macos && x11_capture;
+
+    let libei_emulation = unix && !macos && libei_emulation;
+    let rdp_emulation = unix && !macos && rdp_emulation;
+    let wlroots_emulation = unix && !macos && wlroots_emulation;
+    let x11_emulation = unix && !macos && x11_emulation;
+
+    println!("cargo::rustc-check-cfg=cfg(layer_shell_capture)");
+    println!("cargo::rustc-check-cfg=cfg(libei_capture)");
+    println!("cargo::rustc-check-cfg=cfg(x11_capture)");
+
+    println!("cargo::rustc-check-cfg=cfg(libei_emulation)");
+    println!("cargo::rustc-check-cfg=cfg(rdp_emulation)");
+    println!("cargo::rustc-check-cfg=cfg(wlroots_emulation)");
+    println!("cargo::rustc-check-cfg=cfg(x11_emulation)");
+
+    if layer_shell_capture {
+        println!("cargo::rustc-cfg=layer_shell_capture");
+    }
+    if libei_capture {
+        println!("cargo::rustc-cfg=libei_capture");
+    }
+    if x11_capture {
+        println!("cargo::rustc-cfg=x11_capture");
+    }
+
+    if libei_emulation {
+        println!("cargo::rustc-cfg=libei_emulation");
+    }
+    if rdp_emulation {
+        println!("cargo::rustc-cfg=rdp_emulation");
+    }
+    if wlroots_emulation {
+        println!("cargo::rustc-cfg=wlroots_emulation");
+    }
+    if x11_emulation {
+        println!("cargo::rustc-cfg=x11_emulation");
+    }
 }

src/config.rs

@@ -118,13 +118,13 @@ pub enum Command {
 
 #[derive(Clone, Copy, Debug, Deserialize, Eq, PartialEq, Serialize, ValueEnum)]
 pub enum CaptureBackend {
-    #[cfg(all(unix, feature = "libei_capture", not(target_os = "macos")))]
+    #[cfg(libei_capture)]
     #[serde(rename = "input-capture-portal")]
     InputCapturePortal,
-    #[cfg(all(unix, feature = "layer_shell_capture", not(target_os = "macos")))]
+    #[cfg(layer_shell_capture)]
     #[serde(rename = "layer-shell")]
     LayerShell,
-    #[cfg(all(unix, feature = "x11_capture", not(target_os = "macos")))]
+    #[cfg(x11_capture)]
     #[serde(rename = "x11")]
     X11,
     #[cfg(windows)]
@@ -140,11 +140,11 @@ pub enum CaptureBackend {
 impl Display for CaptureBackend {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         match self {
-            #[cfg(all(unix, feature = "libei_capture", not(target_os = "macos")))]
+            #[cfg(libei_capture)]
             CaptureBackend::InputCapturePortal => write!(f, "input-capture-portal"),
-            #[cfg(all(unix, feature = "layer_shell_capture", not(target_os = "macos")))]
+            #[cfg(layer_shell_capture)]
             CaptureBackend::LayerShell => write!(f, "layer-shell"),
-            #[cfg(all(unix, feature = "x11_capture", not(target_os = "macos")))]
+            #[cfg(x11_capture)]
             CaptureBackend::X11 => write!(f, "X11"),
             #[cfg(windows)]
             CaptureBackend::Windows => write!(f, "windows"),
@@ -158,11 +158,11 @@ impl Display for CaptureBackend {
 impl From<CaptureBackend> for input_capture::Backend {
     fn from(backend: CaptureBackend) -> Self {
         match backend {
-            #[cfg(all(unix, feature = "libei_capture", not(target_os = "macos")))]
+            #[cfg(libei_capture)]
             CaptureBackend::InputCapturePortal => Self::InputCapturePortal,
-            #[cfg(all(unix, feature = "layer_shell_capture", not(target_os = "macos")))]
+            #[cfg(layer_shell_capture)]
             CaptureBackend::LayerShell => Self::LayerShell,
-            #[cfg(all(unix, feature = "x11_capture", not(target_os = "macos")))]
+            #[cfg(x11_capture)]
             CaptureBackend::X11 => Self::X11,
             #[cfg(windows)]
             CaptureBackend::Windows => Self::Windows,
@@ -175,16 +175,16 @@ impl From<CaptureBackend> for input_capture::Backend {
 
 #[derive(Clone, Copy, Debug, Deserialize, Eq, PartialEq, Serialize, ValueEnum)]
 pub enum EmulationBackend {
-    #[cfg(all(unix, feature = "wlroots_emulation", not(target_os = "macos")))]
+    #[cfg(wlroots_emulation)]
     #[serde(rename = "wlroots")]
     Wlroots,
-    #[cfg(all(unix, feature = "libei_emulation", not(target_os = "macos")))]
+    #[cfg(libei_emulation)]
     #[serde(rename = "libei")]
     Libei,
-    #[cfg(all(unix, feature = "rdp_emulation", not(target_os = "macos")))]
+    #[cfg(rdp_emulation)]
     #[serde(rename = "xdp")]
     Xdp,
-    #[cfg(all(unix, feature = "x11_emulation", not(target_os = "macos")))]
+    #[cfg(x11_emulation)]
     #[serde(rename = "x11")]
     X11,
     #[cfg(windows)]
@@ -200,13 +200,13 @@ pub enum EmulationBackend {
 impl From<EmulationBackend> for input_emulation::Backend {
     fn from(backend: EmulationBackend) -> Self {
         match backend {
-            #[cfg(all(unix, feature = "wlroots_emulation", not(target_os = "macos")))]
+            #[cfg(wlroots_emulation)]
             EmulationBackend::Wlroots => Self::Wlroots,
-            #[cfg(all(unix, feature = "libei_emulation", not(target_os = "macos")))]
+            #[cfg(libei_emulation)]
             EmulationBackend::Libei => Self::Libei,
-            #[cfg(all(unix, feature = "rdp_emulation", not(target_os = "macos")))]
+            #[cfg(rdp_emulation)]
             EmulationBackend::Xdp => Self::Xdp,
-            #[cfg(all(unix, feature = "x11_emulation", not(target_os = "macos")))]
+            #[cfg(x11_emulation)]
             EmulationBackend::X11 => Self::X11,
             #[cfg(windows)]
             EmulationBackend::Windows => Self::Windows,
@@ -220,13 +220,13 @@ impl From<EmulationBackend> for input_emulation::Backend {
 impl Display for EmulationBackend {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         match self {
-            #[cfg(all(unix, feature = "wlroots_emulation", not(target_os = "macos")))]
+            #[cfg(wlroots_emulation)]
             EmulationBackend::Wlroots => write!(f, "wlroots"),
-            #[cfg(all(unix, feature = "libei_emulation", not(target_os = "macos")))]
+            #[cfg(libei_emulation)]
             EmulationBackend::Libei => write!(f, "libei"),
-            #[cfg(all(unix, feature = "rdp_emulation", not(target_os = "macos")))]
+            #[cfg(rdp_emulation)]
             EmulationBackend::Xdp => write!(f, "xdg-desktop-portal"),
-            #[cfg(all(unix, feature = "x11_emulation", not(target_os = "macos")))]
+            #[cfg(x11_emulation)]
             EmulationBackend::X11 => write!(f, "X11"),
             #[cfg(windows)]
             EmulationBackend::Windows => write!(f, "windows"),