| 1 | # vim:filetype=sh |
| 2 | # .bashrc for fancy prompt |
| 3 | |
| 4 | # max length of cwd |
| 5 | _wdlen=36 |
| 6 | |
| 7 | ## colors |
| 8 | _RESET=`echo -ne '\033[0m'` |
| 9 | _RED=`echo -ne '\033[0;31m'` |
| 10 | _GREEN=`echo -ne '\033[0;32m'` |
| 11 | _YELLOW=`echo -ne '\033[0;33m'` |
| 12 | _BLUE=`echo -ne '\033[0;34m'` |
| 13 | _MAGENTA=`echo -ne '\033[0;35m'` |
| 14 | _CYAN=`echo -ne '\033[0;36m'` |
| 15 | _GRAY=`echo -ne '\033[0;37m'` |
| 16 | |
| 17 | ## username and hostname colors depend on their values |
| 18 | _HCDEF="$_BLUE" |
| 19 | |
| 20 | host2color() |
| 21 | { |
| 22 | local colors sum |
| 23 | colors=("$_RESET" "$_BLUE" "$_MAGENTA" "$_CYAN") |
| 24 | sum=$(echo -n "$HOSTNAME" | sum) |
| 25 | sum="${sum:0:1}" |
| 26 | _HCDEF=${colors[sum % ${#colors[*]}]} |
| 27 | } |
| 28 | |
| 29 | host2color |
| 30 | unset host2color |
| 31 | |
| 32 | ## user |
| 33 | if [ $UID -eq 0 ]; then |
| 34 | _c_u="$_RED" |
| 35 | else |
| 36 | _c_u="$_GREEN" |
| 37 | fi |
| 38 | |
| 39 | ## optimize access to load |
| 40 | if [ -r /proc/loadavg ]; then |
| 41 | _get_loadavg() { |
| 42 | _loadavg=$(< /proc/loadavg) |
| 43 | _loadavg="${_loadavg%%[, ]*}" |
| 44 | } |
| 45 | else |
| 46 | _get_loadavg_fresh=0 |
| 47 | _get_loadavg() { |
| 48 | if [ $_get_loadavg_fresh -lt $SECONDS ]; then |
| 49 | _loadavg=$(trap "" SIGTSTP; uptime) |
| 50 | _loadavg="${_loadavg##*: }" |
| 51 | _loadavg="${_loadavg%%[, ]*}" |
| 52 | _get_loadavg_fresh=$((SECONDS+5)) |
| 53 | _get_loadavg_save=$_loadavg |
| 54 | else |
| 55 | _loadavg=$_get_loadavg_save |
| 56 | fi |
| 57 | } |
| 58 | fi |
| 59 | |
| 60 | ## prompt (xterm/screen/... title and PS1) |
| 61 | _prompt() { |
| 62 | ## must store $? first, it will get changed |
| 63 | local _r=$? _wdlb _wdla _jobs_ids |
| 64 | |
| 65 | ## success/failure |
| 66 | if [ $_r -eq 0 ]; then |
| 67 | _c_p="$_GREEN" |
| 68 | elif [ $_r -eq 127 ]; then |
| 69 | _c_p="$_BLUE" |
| 70 | else |
| 71 | _c_p="$_RED" |
| 72 | fi |
| 73 | |
| 74 | ## misc info |
| 75 | _jobs_ids=( $(jobs -p) ) |
| 76 | _jobs=${#_jobs_ids[*]} |
| 77 | _get_loadavg |
| 78 | |
| 79 | ## pwd |
| 80 | _wd="${PWD/#$HOME/~}" |
| 81 | if [ "${#_wd}" -gt $_wdlen ]; then |
| 82 | _wdp="${_wd%/*/*}" |
| 83 | _wd="${_wd/#$_wdp\/}" |
| 84 | _wdm=" .. " |
| 85 | |
| 86 | let _wdlb=_wdlen/3 _wdla=_wdlen-_wdlb |
| 87 | if [ "${#_wd}" -gt $_wdla ]; then |
| 88 | _wd="${_wd:${#_wd}-_wdla}" |
| 89 | else |
| 90 | let _wdlb+="_wdla-${#_wd}" |
| 91 | fi |
| 92 | |
| 93 | if [ "${#_wdp}" -gt $_wdlb ]; then |
| 94 | _wdp="${_wdp:0:_wdlb}" |
| 95 | fi |
| 96 | else |
| 97 | _wdp="" |
| 98 | _wdm="" |
| 99 | fi |
| 100 | |
| 101 | ## title string |
| 102 | _promptstr="$_loadavg/$_jobs/${USER}@${HOSTNAME%%.*}:${PWD/#$HOME/~}" |
| 103 | |
| 104 | ## add window information from screen |
| 105 | if [ -n "$WINDOW" ]; then |
| 106 | _promptstr="$WINDOW $_promptstr" |
| 107 | fi |
| 108 | |
| 109 | ## hostname color from loadavg |
| 110 | let _loadavg="10#${_loadavg//.}" |
| 111 | if [ $_loadavg -ge 150 ]; then |
| 112 | _c_h="$_RED" |
| 113 | elif [ $_loadavg -gt 75 ]; then |
| 114 | _c_h="$_YELLOW" |
| 115 | else |
| 116 | _c_h="$_HCDEF" |
| 117 | fi |
| 118 | |
| 119 | ## jobs (empty if no job) |
| 120 | if [ $_jobs -gt 0 ]; then |
| 121 | _c_j="$_RED" |
| 122 | _jobs="$_jobs " |
| 123 | else |
| 124 | _c_j="$_RESET" |
| 125 | _jobs="" |
| 126 | fi |
| 127 | return $_r |
| 128 | } |
| 129 | |
| 130 | _prompt_xterm-color() { |
| 131 | echo -ne "\033]0;$_promptstr\007" |
| 132 | } |
| 133 | |
| 134 | _prompt_xterm() { |
| 135 | echo -ne "\033]0;$_promptstr\007" |
| 136 | } |
| 137 | |
| 138 | _prompt_screen() { |
| 139 | echo -ne "\033_$_promptstr\033\\" |
| 140 | } |
| 141 | |
| 142 | PROMPT_COMMAND="_prompt" |
| 143 | if type -t _prompt_$TERM > /dev/null; then |
| 144 | PROMPT_COMMAND="$PROMPT_COMMAND; _prompt_$TERM" |
| 145 | fi |
| 146 | |
| 147 | if type -t _prompt_$SCREENTERM > /dev/null; then |
| 148 | PROMPT_COMMAND="$PROMPT_COMMAND; _prompt_$SCREENTERM" |
| 149 | fi |
| 150 | |
| 151 | PS1='\[$_c_u\]\u\[$_RESET\] \[$_c_h\]\h\[$_RESET\] \[$_RESET\]$_wdp\[$_GRAY\]$_wdm\[$_RESET\]$_wd\[$_RESET\] \[$_c_j\]$_jobs\[$_c_p\]\$\[$_RESET\] ' |
| 152 | |
