86 lines
3.2 KiB
Bash
86 lines
3.2 KiB
Bash
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#!/usr/bin/env bash
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# ---------------------------------------------------------------------------
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# Launch one polybar instance per connected monitor.
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# Hardware-specific values are detected here and passed to polybar as
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# environment variables, so config.ini stays machine-independent.
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# ---------------------------------------------------------------------------
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set -uo pipefail
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CONFIG="$HOME/.config/polybar/config.ini"
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LOG="${XDG_CACHE_HOME:-$HOME/.cache}/polybar.log"
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mkdir -p "$(dirname "$LOG")"
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# --- stop any running instances and wait for them to die -------------------
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pkill -x polybar >/dev/null 2>&1 || true
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for _ in {1..20}; do
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pgrep -x polybar >/dev/null || break
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sleep 0.1
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done
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# Anything still alive gets the hammer.
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pgrep -x polybar >/dev/null && pkill -9 -x polybar
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# --- hardware detection ----------------------------------------------------
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# Battery + AC adapter
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BATTERY="$(ls -1 /sys/class/power_supply 2>/dev/null | grep -m1 '^BAT' || true)"
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ADAPTER="$(ls -1 /sys/class/power_supply 2>/dev/null | grep -m1 -E '^(AC|ADP|ACAD)' || true)"
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export BATTERY="${BATTERY:-BAT0}"
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export ADAPTER="${ADAPTER:-AC}"
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# Backlight device (intel_backlight, amdgpu_bl0, nvidia_0, …)
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BACKLIGHT="$(ls -1 /sys/class/backlight 2>/dev/null | head -n1 || true)"
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export BACKLIGHT="${BACKLIGHT:-intel_backlight}"
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# Network interfaces: wireless ones have a /sys/class/net/*/wireless dir
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WLAN_IFACE=""
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ETH_IFACE=""
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for iface in /sys/class/net/*; do
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name="$(basename "$iface")"
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[[ "$name" == "lo" ]] && continue
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if [[ -d "$iface/wireless" ]]; then
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[[ -z "$WLAN_IFACE" ]] && WLAN_IFACE="$name"
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else
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[[ -z "$ETH_IFACE" ]] && ETH_IFACE="$name"
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fi
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done
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export WLAN_IFACE ETH_IFACE
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# --- module pruning --------------------------------------------------------
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# Desktops have no battery/backlight; leaving those modules enabled makes
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# polybar spam the log, so build the right-hand module list dynamically.
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MODULES_RIGHT="filesystem memory cpu temperature"
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[[ -d "/sys/class/backlight/$BACKLIGHT" ]] && MODULES_RIGHT+=" backlight"
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MODULES_RIGHT+=" pulseaudio"
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[[ -n "$WLAN_IFACE" ]] && MODULES_RIGHT+=" wlan"
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[[ -n "$ETH_IFACE" ]] && MODULES_RIGHT+=" eth"
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[[ -d "/sys/class/power_supply/$BATTERY" ]] && MODULES_RIGHT+=" battery"
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MODULES_RIGHT+=" systray"
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export MODULES_RIGHT
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# --- launch ----------------------------------------------------------------
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{
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echo
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echo "=== polybar launch $(date -Is) ==="
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echo "battery=$BATTERY adapter=$ADAPTER backlight=$BACKLIGHT wlan=${WLAN_IFACE:-none} eth=${ETH_IFACE:-none}"
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echo "modules-right=$MODULES_RIGHT"
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} >>"$LOG"
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if command -v polybar >/dev/null && polybar --list-monitors >/dev/null 2>&1; then
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# The tray can only live on one bar; give it to the primary monitor.
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primary="$(polybar --list-monitors | grep -m1 '(primary)' | cut -d: -f1)"
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while IFS= read -r line; do
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m="${line%%:*}"
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[[ -z "$m" ]] && continue
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if [[ -n "$primary" && "$m" != "$primary" ]]; then
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MONITOR="$m" MODULES_RIGHT="${MODULES_RIGHT/ systray/}" \
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polybar --reload main --config="$CONFIG" >>"$LOG" 2>&1 &
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else
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MONITOR="$m" polybar --reload main --config="$CONFIG" >>"$LOG" 2>&1 &
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fi
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done < <(polybar --list-monitors)
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else
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polybar --reload main --config="$CONFIG" >>"$LOG" 2>&1 &
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fi
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echo "polybar launched" >>"$LOG"
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