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eww: simplify config
author
lassulus
date
(Dec 11, 2025, 6:59 PM CET)
commit
f223068a
f223068aff2cee9fb956acb6fb67392cba123bc4
parent
c6f5f190
c6f5f1900554e6a1b52f24c27d334b99f52df56b
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2configs/desktops/sway/eww.nix
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2configs/desktops/sway/eww.nix
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# eww configuration
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ewwYuck = pkgs.writeText "eww.yuck" ''
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; Variables with polling - set initial values to avoid empty string errors
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(defpoll time :interval "1s" :initial "00:00" "date '+%H:%M'")
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(defpoll date :interval "60s" :initial "0000-00-00" "date '+%Y-%m-%d'")
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(defpoll cpu :interval "2s" :initial '{"usage": 0, "load": "0.00", "freq": 0}' "${lib.getExe cpuScript}")
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(defpoll memory :interval "2s" :initial 0 "${lib.getExe memScript}")
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; Magic variables (built-in, no polling needed)
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; EWW_TIME provides current time
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; EWW_CPU provides {cores: [...], avg: X}
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; EWW_RAM provides {used_mem_perc: X, available_mem: Y, total_mem: Z, ...}
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; Custom variables with polling
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(defpoll cpu-freq :interval "2s" :initial 0 "${lib.getExe cpuFreqScript}")
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(defpoll cpu-load :interval "2s" :initial "0.00" "cut -d' ' -f1 /proc/loadavg")
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(defpoll temperature :interval "2s" :initial '{"temp": 0, "fan": 0}' "${lib.getExe tempScript}")
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(defpoll battery :interval "10s" :initial '{"capacity": "100", "icon": "", "watts": "0", "time_remaining": "--", "status": "Full"}' "${lib.getExe batteryScript}")
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(defpoll volume :interval "1s" :initial '{"level": "0", "icon": ""}' "${lib.getExe volumeScript}")
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(defwidget center []
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(box :class "center" :orientation "h" :space-evenly false :halign "center"
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(label :text "''${time}")))
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(label :text {formattime(EWW_TIME, "%H:%M")})))
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(defwidget right []
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(box :class "right" :orientation "h" :space-evenly false :halign "end" :spacing 8
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(network-widget)
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(volume-widget)
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(graph-widget :value {cpu.usage} :icon "" :class "cpu" :unit "%" :tooltip "Load: ''${cpu.load} | ''${cpu.freq} MHz")
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(graph-widget :value memory :icon "" :class "memory" :unit "%")
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(graph-widget :value {EWW_CPU.avg} :icon "" :class "cpu" :unit "%" :tooltip "Load: ''${cpu-load} | ''${cpu-freq} MHz")
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(graph-widget :value {EWW_RAM.used_mem_perc} :icon "" :class "memory" :unit "%")
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(graph-widget :value {temperature.temp} :icon "" :class "temp" :unit "°" :tooltip "Fan: ''${temperature.fan} RPM")
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(brightness-widget)
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(battery-widget)
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(idle-inhibitor)
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(label :class "date" :text "''${date}")
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(label :class "date" :text {formattime(EWW_TIME, "%Y-%m-%d")})
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(systray :class "systray" :icon-size 18 :spacing 4)))
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(defwidget workspaces-widget []
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:dynamic true
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:line-style "round"
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:width 75)
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(label :text "''${value}''${unit} ''${icon}")))
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(label :text "''${round(value, 0)}''${unit} ''${icon}")))
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(defwidget battery-widget []
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(box :class "battery" :orientation "h" :space-evenly false
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}
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'';
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cpuScript = pkgs.writeShellApplication {
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name = "eww-cpu";
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runtimeInputs = [ pkgs.jq ];
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cpuFreqScript = pkgs.writeShellApplication {
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name = "eww-cpu-freq";
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runtimeInputs = [ ];
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text = ''
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STATE_FILE="/tmp/eww-cpu-state"
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read -r _cpu user nice system idle _rest < /proc/stat
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total=$((user + nice + system + idle))
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if [ -f "$STATE_FILE" ]; then
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read -r prev_total prev_idle < "$STATE_FILE"
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diff_total=$((total - prev_total))
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diff_idle=$((idle - prev_idle))
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if [ "$diff_total" -gt 0 ]; then
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usage=$((100 * (diff_total - diff_idle) / diff_total))
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else
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usage=0
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fi
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else
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usage=0
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fi
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echo "$total $idle" > "$STATE_FILE"
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# Get load average (1 min)
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load=$(cut -d' ' -f1 /proc/loadavg)
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# Get average CPU frequency in MHz
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freq=0
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count=0
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if [ "$count" -gt 0 ]; then
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freq=$((freq / count / 1000))
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fi
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jq -n --argjson usage "$usage" --arg load "$load" --argjson freq "$freq" \
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'{usage: $usage, load: $load, freq: $freq}'
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'';
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};
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memScript = pkgs.writeShellApplication {
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name = "eww-mem";
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runtimeInputs = [ pkgs.gawk ];
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text = ''
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awk '/MemTotal/ {total=$2} /MemAvailable/ {available=$2} END {printf "%d", (total-available)*100/total}' /proc/meminfo
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echo "$freq"
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'';
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};
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