I am batman

scripts/waybar-cava.sh

@@ -0,0 +1,41 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+bar="▁ ▂ ▃ ▄ ▅ ▆ ▇ █"
+dict="s/;//g"
+for ((i=0; i<${#bar}; i++)); do
+  dict+=";s/$i/${bar:$i:1}/g"
+done
+
+RUNTIME_DIR="${XDG_RUNTIME_DIR:-/tmp}"
+pidfile="$RUNTIME_DIR/waybar-cava.pid"
+if [ -f "$pidfile" ]; then
+  oldpid=$(cat "$pidfile" || true)
+  if [ -n "$oldpid" ] && kill -0 "$oldpid" 2>/dev/null; then
+    kill "$oldpid" 2>/dev/null || true
+    sleep 0.1
+  fi
+fi
+echo $$ > "$pidfile"
+
+config_file=$(mktemp "$RUNTIME_DIR/waybar-cava.XXXXXX.conf")
+cleanup() { rm -f "$config_file" "$pidfile"; }
+trap cleanup EXIT INT TERM
+
+cat >"$config_file" <<EOF
+[general]
+framerate = 30
+bars = 10
+
+[input]
+method = pulse
+source = auto
+
+[output]
+method = raw
+raw_target = /dev/stdout
+data_format = ascii
+ascii_max_range = 7
+EOF
+
+exec cava -p "$config_file" | sed -u "$dict"