150 lines
4.8 KiB
Bash
150 lines
4.8 KiB
Bash
#!/usr/bin/env zsh
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# ============================================================================
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# MOTD (Message of the Day) - Dynamic System Info
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# ============================================================================
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# Displays system information on shell startup
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#
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# Functions:
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# show_motd - Compact box format
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# show_motd_mini - Single line format
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# ============================================================================
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# Only run in interactive shells
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[[ -o interactive ]] || return 0
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# Source shared colors (with fallback)
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source "${0:A:h}/../lib/colors.zsh" 2>/dev/null || \
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source "$HOME/.dotfiles/zsh/lib/colors.zsh" 2>/dev/null || {
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typeset -g DF_RESET=$'\033[0m' DF_BOLD=$'\033[1m' DF_DIM=$'\033[2m'
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typeset -g DF_BLUE=$'\033[38;5;39m' DF_CYAN=$'\033[38;5;51m'
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typeset -g DF_GREEN=$'\033[38;5;82m' DF_YELLOW=$'\033[38;5;220m'
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typeset -g DF_GREY=$'\033[38;5;242m' DF_NC=$'\033[0m'
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}
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# ============================================================================
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# MOTD Width
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# ============================================================================
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typeset -g _M_WIDTH=66
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# ============================================================================
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# Info Gathering
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# ============================================================================
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_motd_uptime() {
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local up=$(uptime 2>/dev/null)
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if [[ "$up" =~ "up "([^,]+) ]]; then
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echo "${match[1]}" | sed 's/^ *//'
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else
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echo "?"
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fi
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}
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_motd_load() {
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if [[ -f /proc/loadavg ]]; then
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awk '{print $1}' /proc/loadavg
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else
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uptime | awk -F'load average:' '{print $2}' | awk -F, '{print $1}' | xargs
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fi
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}
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_motd_mem() {
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free -h 2>/dev/null | awk '/^Mem:/ {print $3 "/" $2}' || echo "N/A"
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}
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_motd_disk() {
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df -h / 2>/dev/null | awk 'NR==2 {print $3 "/" $4}' || echo "N/A"
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}
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# ============================================================================
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# Box Drawing - Fixed Width
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# ============================================================================
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_motd_line() {
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local char="$1"
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local i
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local line=""
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for ((i=0; i<_M_WIDTH; i++)); do
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line+="$char"
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done
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echo "$line"
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}
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_motd_pad() {
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local str="$1"
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local width="$2"
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local len=${#str}
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if (( len >= width )); then
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echo "${str:0:$width}"
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else
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printf "%-${width}s" "$str"
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fi
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}
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# ============================================================================
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# Main Display Function
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# ============================================================================
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show_motd() {
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[[ -n "$_MOTD_SHOWN" && "$1" != "--force" ]] && return 0
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typeset -g _MOTD_SHOWN=1
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local hostname="${HOST:-$(hostname -s 2>/dev/null)}"
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local datetime=$(date '+%a %b %d %H:%M')
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local uptime=$(_motd_uptime)
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local load=$(_motd_load)
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local mem=$(_motd_mem)
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local disk=$(_motd_disk)
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local local_ip=$(hostname -i 2>/dev/null | awk -F" " '{print $1}' || echo "N/A")
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local hline=$(_motd_line '═')
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local inner=$((_M_WIDTH - 2))
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echo ""
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# Top border
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echo "${DF_GREY}╒${hline}╕${DF_NC}"
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# Header: hostname + datetime
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local h_left="✦ ${hostname}"
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local h_center="${local_ip}"
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local h_right="${datetime}"
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local h_pad=$(((inner - ${#h_left} - ${#h_center} - ${#h_right}) / 2 ))
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local h_spaces=""
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for ((i=0; i<h_pad; i++)); do h_spaces+=" "; done
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echo "${DF_GREY}│${DF_NC} ${DF_BOLD}${DF_BLUE}${h_left}${DF_NC}${h_spaces}${DF_YELLOW}${h_center}${h_spaces}${DF_NC}${DF_BOLD}${h_right}${DF_NC}${DF_GREY} │${DF_NC}"
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# Separator
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echo "${DF_GREY}╘${hline}╛${DF_NC}"
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# Stats line
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local s1="${DF_YELLOW}▲ up:${DF_NC}${uptime}"
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local s2="${DF_CYAN}◆ load:${DF_NC}${load}"
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local s3="${DF_GREEN}◇ mem:${DF_NC}${mem}"
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local s4="${DF_BLUE}⊡${DF_NC} ${disk}"
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echo "${DF_GREY}${DF_DIM} 〘${DF_NC}${s1}${DF_GREY}${DF_DIM}〙⎯〘${s2}${DF_GREY}${DF_DIM}〙⎯〘${s3}${DF_GREY}${DF_DIM}〙⎯〘${s4}${DF_GREY}${DF_DIM}〙 ${DF_NC}"
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echo ""
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}
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# ============================================================================
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# Mini Format (Single Line)
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# ============================================================================
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show_motd_mini() {
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[[ -n "$_MOTD_SHOWN" && "$1" != "--force" ]] && return 0
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typeset -g _MOTD_SHOWN=1
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local hostname="${HOST:-$(hostname -s 2>/dev/null)}"
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local uptime=$(_motd_uptime)
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local mem=$(_motd_mem)
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echo "${DF_DIM}──${DF_NC} ${DF_BOLD}${hostname}${DF_NC} ${DF_DIM}│${DF_NC} up:${uptime} ${DF_DIM}│${DF_NC} mem:${mem} ${DF_DIM}──${DF_NC}"
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}
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# ============================================================================
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# Aliases
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# ============================================================================
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alias motd='show_motd --force'
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alias motd-mini='show_motd_mini --force'
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