Mark DBus modules as features

Cargo.toml

@@ -9,16 +9,21 @@ gethostname = "0.4.1"
 wayland-client = "0.30.1"
 wayland-scanner = "0.30"
 wayland-backend = "0.1"
+x11rb = { version = "0.11.1", features = ["screensaver"] }
+zbus = {version = "3.11.1", optional = true}
 chrono = "0.4.24"
-serde_json = "1.0.95"
-zbus = "3.11.1"
+toml = "0.7.3"
 clap = { version = "4.2.1", features = ["string"] }
 log = { version = "0.4.17", features = ["std"] }
 fern = { version = "0.6.2", features = ["colored"] }
-x11rb = { version = "0.11.1", features = ["screensaver"] }
-toml = "0.7.3"
 dirs = "5.0.0"
 serde = { version = "1.0.160", features = ["derive"] }
 serde_default = "0.1.0"
+serde_json = "1.0.95"
 regex = "1.8.1"
 anyhow = "1.0.70"
+
+[features]
+default = ["gnome", "kwin_window"]
+gnome = ["zbus"]
+kwin_window = ["zbus"]

README.md

@@ -18,6 +18,9 @@ and to add more flexibility to reports.
 - `cargo build --release` in the root of the repository.
 - The target file will be located at `target/release/awatcher`.
 
+Add `--no-default-features` to the build command if you want to opt out of the Gnome and KDE support,
+add `--features=?` ("gnome" or "kwin_window") on top of that if you want to enable just one.
+
 To track your activities in browsers install the plugin for your browser from 
 [here](https://github.com/ActivityWatch/aw-watcher-web) (Firefox, Chrome etc).
 

src/watchers.rs

@@ -1,6 +1,9 @@
+#[cfg(feature = "gnome")]
 mod gnome_idle;
+#[cfg(feature = "gnome")]
 mod gnome_window;
 mod idle;
+#[cfg(feature = "kwin_window")]
 mod kwin_window;
 mod wl_bindings;
 mod wl_connection;
@@ -52,13 +55,16 @@ macro_rules! watcher {
 pub const IDLE: &WatcherConstructors = &[
     watcher!(wl_kwin_idle::IdleWatcher),
     watcher!(x11_screensaver_idle::IdleWatcher),
+    #[cfg(feature = "gnome")]
     watcher!(gnome_idle::IdleWatcher),
 ];
 
 pub const ACTIVE_WINDOW: &WatcherConstructors = &[
     watcher!(wl_foreign_toplevel::WindowWatcher),
     // XWayland gives _NET_WM_NAME on some windows in KDE, but not on others
+    #[cfg(feature = "kwin_window")]
     watcher!(kwin_window::WindowWatcher),
     watcher!(x11_window::WindowWatcher),
+    #[cfg(feature = "gnome")]
     watcher!(gnome_window::WindowWatcher),
 ];