waybar updates

modules/home/apps/helpers/waybar/bar.sh

@@ -0,0 +1,79 @@
+#! /bin/bash
+
+# --- Configuration ---
+bar="▁▂▃▄▅▆▇█"
+# Number of bars Cava should output
+num_bars=8
+# Max height for ASCII output (should match length of bar string - 1)
+ascii_max_range=$((${#bar} - 1))
+# Temporary config file path (using PID $$ for uniqueness)
+config_file="/tmp/polybar_cava_config_$$"
+
+# --- Argument Handling ---
+if [ $# -lt 1 ]; then
+  # Print error message to stderr
+  echo "Error: Please provide the PulseAudio source name as an argument." >&2
+  echo "Usage: $0 <cava_pulse_source_name>" >&2
+  echo "Example: $0 alsa_output.pci-0000_00_1f.3.analog-stereo.monitor" >&2
+  echo "You can find source names using: pactl list sources | grep 'Name:'" >&2
+  exit 1
+fi
+
+# Assign the first argument to the pulse_source variable
+pulse_source="$1"
+
+# --- Functions ---
+
+# Function to clean up the temporary config file on exit
+cleanup() {
+  rm -f "$config_file"
+}
+
+# --- Main Script ---
+
+# Set trap to call cleanup function on script exit (including Ctrl+C)
+trap cleanup EXIT
+
+# Build the sed dictionary string to replace numbers with bar characters
+dict="s/;//g;"
+i=0
+# Use modern arithmetic expansion and loop condition
+while ((i < ${#bar})); do
+  # Safely append to the dictionary string
+  dict="${dict}s/$i/${bar:$i:1}/g;"
+  # Use modern arithmetic increment
+  ((i++))
+done
+
+# Create the Cava configuration file using printf for safety
+# Note: Using the pulse_source variable passed as an argument
+printf '%s\n' "
+[general]
+bars = $num_bars
+
+[input]
+method = pulse
+source = \"$pulse_source\"
+
+[output]
+method = raw
+raw_target = /dev/stdout
+data_format = ascii
+channels = mono
+mono_option = average
+ascii_max_range = $ascii_max_range
+" >"$config_file" || {
+  echo "Error: Failed to write Cava config." >&2
+  exit 1
+} # Exit if write fails
+
+# Run Cava with the generated config and process its output
+# Use 'exec cava' if you don't need the script to do anything after cava finishes
+cava -p "$config_file" | while IFS= read -r line; do
+  # Translate numbers to bars using sed
+  echo "$line" | sed "$dict"
+done
+
+# The trap will handle cleanup automatically here
+# If 'exec cava' was used above, this part is unreachable
+exit 0