lkjalkjdsalkj

pkgs/device-mon/default.nix

@@ -0,0 +1,7 @@
+{ writeShellApplication, libnotify }:
+
+writeShellApplication {
+  name = "device-mon";
+  runtimeInputs = [ libnotify ];
+  text = builtins.readFile ./main.sh;
+}

pkgs/device-mon/main.sh

@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+
+trap "echo Exited!; exit;" SIGINT SIGTERM
+
+OLD="$(lsusb)"
+while true; do
+    watch --chgexit -n0.2 lsusb >& /dev/null
+    NEW="$(lsusb)"
+
+    diff <(cat <<<"$OLD") <(cat <<<"$NEW") --unified | grep '^[+-]' | grep -Ev '^(---|\+\+\+)' |
+    while read line; do
+        echo "$line"
+        ID="$(   echo "$line" | cut -c2- | cut -d' ' -f-6 )"
+        LABEL="$(echo "$line" | cut -c2- | cut -d' ' -f7- )"
+        case "$line" in
+            \+*)
+                notify-send --icon=device --expire-time=500 "New device connected" "${LABEL} <i>($ID)</i>"
+            ;;
+            \-*)
+                notify-send --icon=device --expire-time=500 "Device disconnected" "${LABEL} <i>($ID)</i>"
+            ;;
+        esac
+    done
+
+    OLD="$NEW"
+done