Fully implement string interpolation with ${} syntax

examples/eww-bar/eww.yuck

@@ -3,6 +3,7 @@
     (workspaces)
     (music)
     (sidestuff)))
+
 (defwidget sidestuff []
   (box :class "sidestuff" :orientation "h" :space-evenly false :halign "end"
     (slider-vol)
@@ -23,12 +24,12 @@
 
 (defwidget music []
   (box :class "music" :orientation "h" :space-evenly false :halign "center"
-    { ' ' + music}))
+    '  ${music}'))
 
 (defwidget slider-vol []
   (box :class "slider-vol" :orientation "h" :space-evenly "false"
     (box :class "label-vol" ""
-      (scale :min 0 :max 101 :value volume :onchange "amixer -D pulse sset Master {}%"))))
+      (scale :min 0 :max 101 :value volume :onchange "amixer -D pulse sset Master \{}%"))))
 
 (defwidget slider-ram []
   (box :orientation "h" :class "slider-ram" :space-evenly false
@@ -38,14 +39,10 @@
 
 (defwidget time []
   (box :class "time"
-    {"{hour}:{min} {month + "the month" * 2} {number_day}, {year_full}"}))
-    ;{hour + ":" + min + " " + month + " " + number_day + ", " + year_full}))
+    "${hour}:${min} ${month} ${number_day}, ${year_full}"))
 
-(defvar music "bruh")
-
-;(defpoll music :interval "5s" "playerctl metadata --format '{{ artist }} - {{ title }}' || true")
-(defvar volume "20")
-;(defpoll volume :interval "16s" "scripts/getvol")
+(defpoll music :interval "5s" "playerctl metadata --format '{{ artist }} - {{ title }}' || true")
+(defpoll volume :interval "1s" "scripts/getvol")
 
 (defpoll number_day :interval "5h"  "date '+%d'")
 (defpoll month      :interval "10h" "date '+%b'")
@@ -61,5 +58,3 @@
   :geometry (geometry :x "0%" :y "0%" :width "100%" :height "4%")
   :reserve (struts :side "top" :distance "4%")
   (bar))
-
-; asdf

examples/eww-bar/scripts/getvol

@@ -1,2 +1,2 @@
 #!/bin/sh
-amixer -D pulse sget Master | grep 'Left:' | awk -F'[][]' '{ print $2 }' | tr -d '%'
+amixer -D pulse sget Master | grep 'Left:' | awk -F'[][]' '{ print $2 }' | tr -d '%' | head -1