feat(home-manager): add cmus module

modules/home-manager/audio/cmus/files/notify.sh

@@ -0,0 +1,45 @@
+#!/usr/bin/env bash
+# shellcheck disable=SC2154
+process_args() {
+    while [ "$#" -ge 2 ]
+    do
+        printf -v "$1" "%s" "$2"
+        shift
+        shift
+    done
+}
+
+main() {
+    filename=${file#*/}
+    image=${file%/*}/cover.jpg
+    [ -f "$image" ] && options="$options -i \"${image}\""
+
+    title=${title:-$filename}
+    if [[ ${#title} -gt 25 ]]; then
+        title="${title:0:24}…"
+    fi
+
+    if [ -n "$artist" ]
+    then
+        if [[ ${#artist} -gt 22 ]]; then
+            artist="<i>by</i> ${artist:0:21}…"
+        fi
+    fi
+
+    if [ -n "$album" ]
+    then
+        if [[ ${#album} -gt 19 ]]; then
+            album="${album:0:18}…"
+        fi
+    fi
+
+    if [ -n "$date" ]
+    then
+        date="${date%%-*}"
+    fi
+    printf -v body "%s\n%-19s <i>%s</i>" "${artist:-}" "${album:-}" "${date:-}"
+    notify-send --app-name=cmus -i "$image"  "$title" "$body"
+}
+
+process_args "$@"
+main