Auto-sync from catchthesethighs
This commit is contained in:
Aaron D. Lee
@@ -1,102 +1,157 @@
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#!/usr/bin/env zsh
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# ============================================================================
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# MOTD — Width-Safe, Color-Safe, Reload-Safe
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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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# ---------------------------- Guards -----------------------------------------
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# Only run in interactive shells
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[[ -o interactive ]] || return 0
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[[ -o interactive ]] || return
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[[ -n $__MOTD_SHOWN ]] && return
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typeset -g __MOTD_SHOWN=1
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# ============================================================================
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# Colors (ANSI escape codes)
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# ============================================================================
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# ---------------------------- Configuration ----------------------------------
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_M_RESET=$'\033[0m'
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_M_BOLD=$'\033[1m'
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_M_DIM=$'\033[2m'
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_M_BLUE=$'\033[38;5;39m'
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_M_CYAN=$'\033[38;5;51m'
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_M_GREEN=$'\033[38;5;82m'
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_M_YELLOW=$'\033[38;5;220m'
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_M_GREY=$'\033[38;5;242m'
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BOX_WIDTH=78 # total width INCLUDING borders
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INNER_WIDTH=$(( BOX_WIDTH - 2 ))
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LABEL_WIDTH=12
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# ============================================================================
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# Info Gathering
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# ============================================================================
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# ---------------------------- Colors -----------------------------------------
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autoload -Uz colors && colors
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C_DIM="%F{242}"
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C_HEAD="%B%F{39}"
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C_LABEL="%F{51}"
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C_OK="%F{82}"
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C_RESET="%f%b"
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# ---------------------------- Low-level helpers ------------------------------
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repeat_char() {
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local ch="$1" n="$2"
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printf '%*s' "$n" '' | tr ' ' "$ch"
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_motd_uptime() {
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local up=$(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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pad_right() {
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local s="$1" w="$2"
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printf '%-*s' "$w" "$s"
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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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center_text() {
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local s="$1" w="$2"
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local len=${#s}
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(( len >= w )) && { print "${s[1,w]}"; return }
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local pad=$(( (w - len) / 2 ))
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printf '%*s%s%*s' "$pad" '' "$s" "$(( w - len - pad ))" ''
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_motd_mem() {
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free -h 2>/dev/null | awk '/^Mem:/ {print $3 "/" $2}' || echo "N/A"
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}
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# ---------------------------- Box primitives ---------------------------------
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box_top() {
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print "${C_DIM}┌$(repeat_char '─' $INNER_WIDTH)┐${C_RESET}"
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_motd_disk() {
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df -h / 2>/dev/null | awk 'NR==2 {print $4 " free"}' || echo "N/A"
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}
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box_bottom() {
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print "${C_DIM}└$(repeat_char '─' $INNER_WIDTH)┘${C_RESET}"
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# ============================================================================
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# Box Drawing - Fixed Width
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# ============================================================================
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# Fixed box width
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_M_WIDTH=62
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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 "$line"
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}
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box_blank() {
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print "${C_DIM}│$(repeat_char ' ' $INNER_WIDTH)│${C_RESET}"
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_motd_pad() {
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# Pad a plain string to exact width
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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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box_line() {
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local content="$1"
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content="$(pad_right "$content" "$INNER_WIDTH")"
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print "${C_DIM}│${C_RESET}${content}${C_DIM}│${C_RESET}"
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# ============================================================================
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# Main Display Function
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# ============================================================================
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show_motd() {
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[[ -n "$_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 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 "${_M_GREY}┌${hline}┐${_M_RESET}"
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# Header: hostname + datetime
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local h_left="✦ ${hostname}"
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local h_right="${datetime}"
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local h_pad=$((inner - ${#h_left} - ${#h_right}))
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local h_spaces=""
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for ((i=0; i<h_pad; i++)); do h_spaces+=" "; done
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echo "${_M_GREY}│${_M_RESET} ${_M_BOLD}${_M_BLUE}✦${_M_RESET} ${_M_BOLD}${hostname}${_M_RESET}${h_spaces}${_M_DIM}${datetime}${_M_RESET} ${_M_GREY}│${_M_RESET}"
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# Separator
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echo "${_M_GREY}├${hline}┤${_M_RESET}"
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# Stats line - build with exact spacing
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local s1="▲up:${uptime}"
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local s2="◆load:${load}"
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local s3="◇mem:${mem}"
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local s4="⊡${disk}"
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local stats_content="${s1} ${s2} ${s3} ${s4}"
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local stats_pad=$((inner - ${#stats_content} - 1))
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local stats_spaces=""
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for ((i=0; i<stats_pad; i++)); do stats_spaces+=" "; done
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echo "${_M_GREY}│${_M_RESET} ${_M_DIM}▲${_M_RESET}up:${uptime} ${_M_DIM}◆${_M_RESET}load:${load} ${_M_DIM}◇${_M_RESET}mem:${mem} ${_M_DIM}⊡${_M_RESET}${disk}${stats_spaces}${_M_GREY} │${_M_RESET}"
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# Bottom border
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echo "${_M_GREY}└${hline}┘${_M_RESET}"
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echo ""
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}
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# ---------------------------- Content builders -------------------------------
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# ============================================================================
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# Mini Format (Single Line)
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# ============================================================================
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header_line() {
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local text="$1"
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box_line "$(center_text "$text" "$INNER_WIDTH")"
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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=$(_motd_mem)
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echo "${_M_DIM}──${_M_RESET} ${_M_BOLD}${hostname}${_M_RESET} ${_M_DIM}│${_M_RESET} up:${uptime} ${_M_DIM}│${_M_RESET} mem:${mem} ${_M_DIM}──${_M_RESET}"
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}
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row_line() {
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local label="$1" value="$2"
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local left="$(pad_right "$label" "$LABEL_WIDTH")"
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box_line " ${left} ${value}"
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}
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# ---------------------------- Info providers ---------------------------------
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get_os() { uname -sr }
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get_uptime() { uptime | sed 's/.*up *//' | cut -d',' -f1 }
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get_load() { uptime | awk -F'load average:' '{print $2}' | xargs }
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get_mem() { free -h | awk '/Mem:/ {print $3 "/" $2}' }
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get_disk() { df -h / | awk 'NR==2 {print $3 "/" $2 " (" $5 ")"}' }
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# ---------------------------- Render -----------------------------------------
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box_top
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header_line "${C_HEAD}$(hostname)${C_RESET} - ${C_DIM}$(get_os)${C_RESET}"
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box_blank
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row_line "${C_LABEL}Uptime${C_RESET}" "$(get_uptime)"
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row_line "${C_LABEL}Load${C_RESET}" "$(get_load)"
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row_line "${C_LABEL}Memory${C_RESET}" "$(get_mem)"
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row_line "${C_LABEL}Disk${C_RESET}" "$(get_disk)"
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box_blank
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box_line " ${C_OK}System up to date${C_RESET}"
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box_bottom
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print
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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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