feat: nb add battery max charge option and quick change for it

2026-02-12 12:01:56 +01:00 · 2026-02-12 12:01:56 +01:00 · 92a216c920
commit 92a216c920
parent 8f2a1e1357
5 changed files with 136 additions and 73 deletions
--- a/hosts/nb/modules/charge-control.nix
+++ b/hosts/nb/modules/charge-control.nix
@ -0,0 +1,91 @@
+{ pkgs, ... }:
+let
+  charge-limit-apply = pkgs.writeShellScriptBin "charge-limit-apply" ''
+    if [ "$1" != "80" ] && [ "$1" != "100" ]; then
+      echo "Usage: charge-limit-apply <80|100>" >&2
+      exit 1
+    fi
+    ${pkgs.fw-ectool}/bin/ectool fwchargelimit "$1"
+    echo "$1" > /run/fw-charge-limit
+    chmod 644 /run/fw-charge-limit
+  '';
+
+  charge-limit-menu = pkgs.writeShellScriptBin "charge-limit-menu" ''
+    choice=$(printf "80%%\n100%%" | ${pkgs.wofi}/bin/wofi --dmenu --prompt "Charge limit")
+    case "$choice" in
+      "80%") /run/wrappers/bin/sudo ${charge-limit-apply}/bin/charge-limit-apply 80 ;;
+      "100%") /run/wrappers/bin/sudo ${charge-limit-apply}/bin/charge-limit-apply 100 ;;
+    esac
+  '';
+
+  waybar-battery = pkgs.writeShellScriptBin "waybar-battery" ''
+    charging_icons=("󰢜" "󰂆" "󰂇" "󰂈" "󰢝" "󰂉" "󰢞" "󰂊" "󰂋" "󰂅")
+    default_icons=("󰁺" "󰁻" "󰁼" "󰁽" "󰁾" "󰁿" "󰂀" "󰂁" "󰂂" "󰁹")
+
+    bat_path=$(echo /sys/class/power_supply/BAT*)
+    capacity=$(cat "$bat_path/capacity" 2>/dev/null || echo 0)
+    status=$(cat "$bat_path/status" 2>/dev/null || echo "Unknown")
+    limit=$(cat /run/fw-charge-limit 2>/dev/null || echo 80)
+
+    # Select icon based on capacity (10 icons, index 0-9)
+    idx=$(( capacity / 11 ))
+    if [ "$idx" -gt 9 ]; then idx=9; fi
+
+    if [ "$status" = "Charging" ]; then
+      icon="''${charging_icons[$idx]}"
+    else
+      icon="''${default_icons[$idx]}"
+    fi
+
+    # Determine CSS class
+    class=""
+    if [ "$capacity" -le 15 ]; then
+      class="critical"
+    elif [ "$capacity" -le 30 ]; then
+      class="warning"
+    elif [ "$capacity" -ge 95 ]; then
+      class="good"
+    fi
+
+    tooltip="Battery: ''${capacity}% [''${status}]\nCharge limit: ''${limit}%"
+
+    ${pkgs.jq}/bin/jq -cn \
+      --arg text "$icon ''${capacity}% (''${limit}%)" \
+      --arg tooltip "$tooltip" \
+      --arg class "$class" \
+      '{text: $text, tooltip: $tooltip, class: $class}'
+  '';
+in
+{
+  environment.systemPackages = [
+    pkgs.fw-ectool
+    charge-limit-apply
+    charge-limit-menu
+    waybar-battery
+  ];
+
+  security.sudo.extraRules = [
+    {
+      users = [ "dominik" ];
+      commands = [
+        {
+          command = "${charge-limit-apply}/bin/charge-limit-apply";
+          options = [ "NOPASSWD" ];
+        }
+      ];
+    }
+  ];
+
+  systemd.services.fw-charge-limit = {
+    description = "Set Framework charge limit on boot";
+    wantedBy = [ "multi-user.target" ];
+    serviceConfig = {
+      Type = "oneshot";
+      ExecStart = "${pkgs.writeShellScript "fw-charge-limit-init" ''
+        ${pkgs.fw-ectool}/bin/ectool fwchargelimit 80
+        echo 80 > /run/fw-charge-limit
+        chmod 644 /run/fw-charge-limit
+      ''}";
+    };
+  };
+}