testing new motd
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@@ -4,90 +4,79 @@
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pkgs,
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pkgs,
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...
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...
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}: let
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}: let
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homelab = config.homelab or {};
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inherit (lib) mkIf mkOption types filterAttrs mapAttrsToList;
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cfg = config.homelab.motd;
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# Build a list of { name, unit } for all non-null motd entries
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# Collect services that have a motd value set
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motdServices = lib.pipe homelab [
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motdServices =
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lib.attrNames
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mapAttrsToList (name: value: value.motd)
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(map (name: {
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(filterAttrs (_: v: v ? motd && v.motd != null) config.homelab);
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inherit name;
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unit = homelab.${name}.motd or null;
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}))
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(lib.filter (s: s.unit != null))
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];
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in {
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in {
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options.homelab.motd = {
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options.homelab.motd = {
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enable = lib.mkEnableOption "enable custom 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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};
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config = lib.mkIf config.homelab.motd.enable {
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config = mkIf cfg.enable {
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# write into /etc/profile.d so shells source it at login
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environment.etc."motd".text = ''
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environment.etc."profile.d/homelab-motd.sh".text = ''
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#!/usr/bin/env bash
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#!/usr/bin/env bash
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# Homelab MOTD — pretty status display
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# Generated by NixOS
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BLUE="\033[1;34m"
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RED="\033[1;31m"
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# ────────────────────────────────────────────────────────────────────────
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GREEN="\033[1;32m"
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# Colors
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YELLOW="\033[1;33m"
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blue="\033[34m"
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RESET="\033[0m"
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red="\033[31m"
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cyan="\033[36m"
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# --- System Info ---
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magenta="\033[35m"
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default_iface=$(ip route | awk '/default/ {print $5; exit}')
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bold="\033[1m"
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ip_addr=$(ip -4 addr show "''${default_iface}" | awk '/inet / {print $2}' | cut -d/ -f1)
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reset="\033[0m"
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nixos_version=$(grep VERSION= /etc/os-release | cut -d'"' -f2)
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kernel_version=$(uname -r)
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# ────────────────────────────────────────────────────────────────────────
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# System info
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echo -e "''${GREEN}System Info''${RESET}"
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hostname=$(hostname)
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echo -e " Hostname: $(hostname)"
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nixos_ver=$(nixos-version 2>/dev/null || echo "unknown")
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echo -e " Interface: ''${default_iface}"
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kernel_ver=$(uname -r)
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echo -e " IPv4: ''${ip_addr}"
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echo -e " NixOS: ''${nixos_version}"
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read iface ipv4 <<< "$(ip route get 1.1.1.1 2>/dev/null | awk '/dev/ {for (i=1;i<=NF;i++) if ($i=="dev") iface=$(i+1); if ($1=="src") ip=$2;} END {print iface, ip}')"
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echo -e " Kernel: ''${kernel_version}"
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echo
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# CPU usage (avg over 1s)
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read cpu_a idle_a < <(awk '/^cpu /{print $2+$4,$5}' /proc/stat)
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# --- Resource Stats ---
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sleep 0.5
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cpu_usage=$(top -bn1 | grep "Cpu(s)" | awk '{print 100 - $8 "%"}')
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read cpu_b idle_b < <(awk '/^cpu /{print $2+$4,$5}' /proc/stat)
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mem_total=$(grep MemTotal /proc/meminfo | awk '{print $2}')
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cpu_usage=$(( (100 * (cpu_b - cpu_a - (idle_b - idle_a))) / (cpu_b - cpu_a) ))
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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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# Memory usage
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mem_percent=$((100 * mem_used / mem_total))
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read total used <<< "$(free -m | awk '/Mem:/ {print $2, $3}')"
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uptime_fmt=$(uptime -p 2>/dev/null || cat /proc/uptime | awk '{print int($1/3600)"h "int(($1%3600)/60)"m"}')
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mem_pct=$((100 * used / total))
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echo -e "''${GREEN}Resources''${RESET}"
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# Uptime
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echo -e " CPU Usage: ''${cpu_usage}"
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uptime_fmt=$(awk '{d=int($1/86400);h=int(($1%86400)/3600);m=int(($1%3600)/60);printf("%dd %dh %dm",d,h,m)}' /proc/uptime)
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echo -e " Memory: ''${mem_percent}% used"
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echo -e " Uptime: ''${uptime_fmt}"
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# ────────────────────────────────────────────────────────────────────────
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echo
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# Display system info
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printf "\\n${bold}${cyan}System Info${reset}\\n"
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# --- Service Status ---
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printf " %-15s %s\\n" "Hostname:" "$hostname"
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echo -e "''${GREEN}Homelab Services''${RESET}"
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printf " %-15s %s\\n" "Interface:" "${iface:-N/A}"
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${lib.concatStringsSep "\n" (map (service: ''
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printf " %-15s %s\\n" "IPv4 Address:" "${ipv4:-N/A}"
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status=$(systemctl is-active ''${service} 2>/dev/null)
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printf " %-15s %s\\n" "NixOS Version:" "$nixos_ver"
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if [ "''${status}" = "active" ]; then
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printf " %-15s %s\\n" "Kernel:" "$kernel_ver"
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echo -e " ''${BLUE}''${service}''${RESET} - running"
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else
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printf "\\n${bold}${magenta}Performance${reset}\\n"
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echo -e " ''${RED}''${service}''${RESET} - not running"
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printf " %-15s %s%%\\n" "CPU Usage:" "$cpu_usage"
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fi
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printf " %-15s %s%% of %s MB\\n" "Memory Usage:" "$mem_pct" "$total"
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'')
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printf " %-15s %s\\n" "Uptime:" "$uptime_fmt"
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motdServices)}
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printf "\\n${bold}${blue}Service Status${reset}\\n"
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echo
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# ────────────────────────────────────────────────────────────────────────
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# Loop through Nix-provided list of services
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${lib.concatStringsSep "\n" (map (s: ''
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status=$(systemctl is-active ${lib.escapeShellArg s.unit} 2>/dev/null)
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if [ "$status" = "active" ]; then
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printf " ${blue}%-25s${reset} %s\\n" "${s.name}" "running"
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else
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printf " ${red}%-25s${reset} %s\\n" "${s.name}" "FAILED ($status)"
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fi
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'') motdServices)}
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echo ""
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'';
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'';
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# make sure it is executable
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environment.etc."motd".mode = "0755";
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environment.etc."profile.d/homelab-motd.sh".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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}
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}
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