119 lines
3.8 KiB
Nix
119 lines
3.8 KiB
Nix
{
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config,
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lib,
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pkgs,
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...
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}: let
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inherit (lib) mkIf mkOption types filterAttrs mapAttrsToList;
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cfg = config.homelab.motd;
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homelab = lib.attrByPath ["homelab"] {} config;
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gameservers = lib.attrByPath ["gameservers"] {} config;
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# collect services to display
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motd_list =
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mapAttrsToList (_: v: v.motd)
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(filterAttrs (
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_: v:
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(v.enable or false)
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&& v ? motd
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&& v.motd != null
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)
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homelab);
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motd_gs_list = lib.concatLists (
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mapAttrsToList (_: v: v.motd_gs)
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(filterAttrs (
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_: v:
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(v.enable or false)
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&& v ? motd_gs
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&& v.motd_gs != null
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)
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gameservers)
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);
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in {
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options.homelab.motd = {
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enable = mkOption {
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type = types.bool;
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default = true;
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description = "enable motd script";
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};
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};
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config = mkIf cfg.enable {
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environment.etc."motd".text = ''
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#!/usr/bin/env bash
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active=$'\033[1;34m'
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inactive=$'\033[1;31m'
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headings=$'\033[1;35m'
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bold=$'\e[1m'
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reset=$'\033[0m'
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memory=`free -m | awk 'NR==2{printf "%s/%sMB (%.2f%%)\n", $3,$2,$3*100 / $2 }'`
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load1=`cat /proc/loadavg | awk {'print $1'}`
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load5=`cat /proc/loadavg | awk {'print $2'}`
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load15=`cat /proc/loadavg | awk {'print $3'}`
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uptime=`cat /proc/uptime | cut -f1 -d.`
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up_days=$((uptime/60/60/24))
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up_hours=$((uptime/60/60%24))
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up_mins=$((uptime/60%60))
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up_secs=$((uptime%60))
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nixos_version=$(nixos-version | sed -E 's/^([0-9]{2}\.[0-9]{2}).*\(([^)]+)\)$/\1 (\2)/')
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cpu_usage=$(top -bn1 | grep "Cpu(s)" | awk '{print 100 - $8 "%"}')
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mem_total=$(grep MemTotal /proc/meminfo | awk '{print $2}')
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mem_avail=$(grep MemAvailable /proc/meminfo | awk '{print $2}')
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mem_used=$((mem_total - mem_avail))
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mem_percent=$((100 * mem_used / mem_total))
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uptime_fmt=$(uptime -p 2>/dev/null || cat /proc/uptime | awk '{print int($1/3600)"h "int(($1%3600)/60)"m"}')
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printf "$bold welcome to $(hostname)!$reset\n"
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printf "\n"
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printf "$bold * %-20s$reset %s\n" "Release" "$nixos_version"
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printf "$bold * %-20s$reset %s\n" "Kernel" "$(uname -rs)"
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printf "\n"
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printf "$bold * %-20s$reset %s\n" "CPU usage" "$load1, $load5, $load15 (1, 5, 15 min)"
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printf "$bold * %-20s$reset %s\n" "Memory" "$memory"
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printf "$bold * %-20s$reset %s\n" "System uptime" "$up_days days $up_hours hours $up_mins minutes $up_secs seconds"
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echo
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# --- services ---
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echo -e "''${headings}homelab services:''${reset}"
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${lib.concatStringsSep "\n" (map (service: ''
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if systemctl list-units --type=service --all | grep -q "${service}"; then
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status=$(systemctl is-active ${service} 2>/dev/null)
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if [ "$status" = "active" ]; then
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printf "%-32s%s\n" " ''${active}[${service}]''${reset}" "running"
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else
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printf "%-32s%s\n" " ''${active}[${service}]''${reset}" "not running"
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fi
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else
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printf "%-32s%s\n" " ''${active}[${service}]''${reset}" "not found"
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fi
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'')
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motd_list)}
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echo
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${lib.optionalString (motd_gs_list != []) ''
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# --- gameservers ---
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echo -e "''${headings}gameservers:''${reset}"
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${lib.concatStringsSep "\n" (map (service: ''
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status=$(systemctl is-active ${service} 2>/dev/null)
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if [ "$status" = "active" ]; then
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printf "%-32s%s\n" " ''${active}[${service}]''${reset}" "running"
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else
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printf "%-32s%s\n" " ''${active}[${service}]''${reset}" "not running"
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fi
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'')
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motd_gs_list)}
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''}
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'';
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environment.etc."motd".mode = "0755";
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programs.zsh.interactiveShellInit = ''
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/etc/motd
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'';
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};
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}
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