From 9d058f5bb496abbc3b1e27599cc34288b9a328ad Mon Sep 17 00:00:00 2001
From: "Alexander \"PapaTutuWawa" <papatutuwawa@polynom.me>
Date: Fri, 3 Sep 2021 14:49:09 +0200
Subject: [PATCH] evdev-proxy: Install the udev rules

---
 .../evdev-proxy/add-evdev-selector.patch      | 101 ++++++++++++++++++
 .../virtualisation/evdev-proxy/default.nix    |  34 ++++++
 2 files changed, 135 insertions(+)
 create mode 100644 packages/tools/virtualisation/evdev-proxy/add-evdev-selector.patch
 create mode 100644 packages/tools/virtualisation/evdev-proxy/default.nix

diff --git a/packages/tools/virtualisation/evdev-proxy/add-evdev-selector.patch b/packages/tools/virtualisation/evdev-proxy/add-evdev-selector.patch
new file mode 100644
index 0000000..58913a1
--- /dev/null
+++ b/packages/tools/virtualisation/evdev-proxy/add-evdev-selector.patch
@@ -0,0 +1,101 @@
+diff --git a/config.toml b/config.toml
+index ba11ce4..3021e89 100644
+--- a/config.toml
++++ b/config.toml
+@@ -27,6 +27,8 @@ log_level = "INFO"
+ #                      on it's usb vendor:model identificator and device 
+ #                      class (Mouse/Keyboard), useful for wireless devices
+ #                      with single receiver (e.g. Logitech Unifying Receiver)
++#      * EVDEVClass -- Simple selector based on the PHYS udev attribute. Mainly
++#                      useful for use with key-mapper
+ #
+ # Example devices:
+ #[[device]]
+diff --git a/src/config.rs b/src/config.rs
+index 06ae8f5..10d7721 100644
+--- a/src/config.rs
++++ b/src/config.rs
+@@ -35,6 +35,9 @@ pub enum DeviceSelector {
+         model: u16,
+         class: USBHIDClass,
+     },
++    EVDEVClass{
++	phys: String,
++    },
+ }
+ 
+ pub fn read_config<P: AsRef<Path> + Debug + ToString>(path: P) -> Result<SelfConfig, ConfigError> {
+diff --git a/src/main.rs b/src/main.rs
+index 19055c7..b5c46ec 100644
+--- a/src/main.rs
++++ b/src/main.rs
+@@ -21,7 +21,10 @@ fn selector_by_config(s: &config::DeviceSelector) -> Box<dyn udevdetect::DevFilt
+         },
+         config::DeviceSelector::USBIDClass{vendor, model, class} => {
+             Box::new(udevdetect::USBIDClassFilter::new(*vendor, *model, *class))
+-        }
++        },
++	config::DeviceSelector::EVDEVClass{phys} => {
++            Box::new(udevdetect::EVDEVFilter::new(String::from(phys)))
++	},
+     }
+ }
+ 
+diff --git a/src/udevdetect/filter_evdev.rs b/src/udevdetect/filter_evdev.rs
+new file mode 100644
+index 0000000..51dc81e
+--- /dev/null
++++ b/src/udevdetect/filter_evdev.rs
+@@ -0,0 +1,34 @@
++use udev::{Device, Event};
++
++use crate::udevdetect::{DevFilter, get_device_property};
++
++#[derive(Debug)]
++pub struct EVDEVFilter {
++    phys: String,
++}
++impl EVDEVFilter {
++    pub fn new(phys: String) -> Self {
++        let f = EVDEVFilter {
++            phys: phys,
++        };
++        debug!("New EVDEV Filter for: {:?}", f.phys);
++        f
++    }
++}
++impl DevFilter for EVDEVFilter {
++    fn match_event(&self, e: &Event) -> bool {
++	return self.match_device(&e.device());
++    }
++
++    fn match_device(&self, e: &Device) -> bool {
++        match e.parent() {
++	    Some(parent) => {
++		if get_device_property(&parent, "PHYS") != self.phys {
++                    return false
++		}
++		true
++	    },
++	    None => false
++	}
++    }
++}
+diff --git a/src/udevdetect/mod.rs b/src/udevdetect/mod.rs
+index c2009a9..e9ed274 100644
+--- a/src/udevdetect/mod.rs
++++ b/src/udevdetect/mod.rs
+@@ -9,11 +9,13 @@ pub use self::filter::DevFilter;
+ pub use self::filter_usbid::USBIDFilter;
+ pub use self::filter_usbidclass::USBIDClassFilter;
+ pub use self::filter_usbidclass::USBHIDClass;
++pub use self::filter_evdev::EVDEVFilter;
+ 
+ mod listener;
+ mod filter;
+ mod filter_usbid;
+ mod filter_usbidclass;
++mod filter_evdev;
+ 
+ fn get_event_property<'a>(ev: &'a Event, key: &'a str) -> &'a str {
+     ev.property_value(key).unwrap_or(OsStr::new("")).to_str().unwrap_or("")
diff --git a/packages/tools/virtualisation/evdev-proxy/default.nix b/packages/tools/virtualisation/evdev-proxy/default.nix
new file mode 100644
index 0000000..6b05fa7
--- /dev/null
+++ b/packages/tools/virtualisation/evdev-proxy/default.nix
@@ -0,0 +1,34 @@
+{ lib, rustPlatform,
+  pkgconfig, udev }:
+
+rustPlatform.buildRustPackage {
+  pname = "evdev-proxy";
+  version = "0.1.1";
+
+  src = builtins.fetchGit {
+    url = "https://github.com/redrampage/evdev-proxy.git";
+    ref = "a21092a7b52144c3bb2b630704c990cee24cb745";
+  };
+
+  cargoSha256 = "18y3pjkiwqpwkwrn5dbkn4rdj86c96h6i2b9ih73jajlw1xli1qy";
+
+  patches = [ ./add-evdev-selector.patch ];
+  
+  nativeBuildInputs = [ pkgconfig ];
+
+  buildInputs = [ udev ];
+
+  postInstall = ''
+    # Install udev rules
+    mkdir -p $out/lib/udev/rules.d/
+    cp 70-uinput-evdev-proxy.rules $out/lib/udev/rules.d/70-uinput-evdev-proxy.rules
+  '';
+  
+  meta = with lib; {
+    description = "Creates virtual device to proxy evdev devices events";
+    homepage = "https://github.com/redrampage/evdev-proxy";
+    license = licenses.gpl3;
+    maintainers = [];
+    platforms = platforms.linux;
+  };
+}