87 lines
2.6 KiB
Nix
87 lines
2.6 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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# Collect all homelab services that define a motd string
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motdServices =
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mapAttrsToList (_: v: v.motd)
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(filterAttrs (_: v: v ? motd && v.motd != null) config.homelab);
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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 the homelab MOTD.";
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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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BLUE="\033[1;34m"
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RED="\033[1;31m"
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YELLOW="\033[1;33m"
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RESET="\033[0m"
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# --- System Info ---
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default_iface=$(ip route | awk '/default/ {print $5; exit}')
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ip_addr=$(ip -4 addr show "''${default_iface}" | awk '/inet / {print $2}' | cut -d/ -f1)
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nixos_version=$(grep VERSION= /etc/os-release | cut -d'"' -f2)
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kernel_version=$(uname -r)
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echo -e "''${YELLOW}System Info''${RESET}"
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echo -e " Hostname: $(hostname)"
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echo -e " Interface: ''${default_iface}"
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echo -e " IPv4: ''${ip_addr}"
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echo -e " NixOS: ''${nixos_version}"
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echo -e " Kernel: ''${kernel_version}"
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echo
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# --- Resource Stats ---
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cpu_usage=$(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(($1%3600)/60)"m"}')
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echo -e "''${YELLOW}Resources''${RESET}"
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echo -e " CPU Usage: ''${cpu_usage}"
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echo -e " Memory: ''${mem_percent}% used"
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echo -e " Uptime: ''${uptime_fmt}"
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echo
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# --- Homelab Services ---
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echo -e "''${YELLOW}Homelab Services''${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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echo -e " ''${BLUE}${service}''${RESET} - running"
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else
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echo -e " ''${RED}${service}''${RESET} - not running"
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fi
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else
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echo -e " ''${RED}${service}''${RESET} - not found"
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fi
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'')
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motdServices)}
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echo
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'';
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environment.etc."motd".mode = "0755";
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programs.bash.interactiveShellInit = ''
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/etc/motd
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'';
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};
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}
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