branches/new_features/common/progress_bar.sh

   1
   2 # $Id$
   3
   4 set -e
   5
   6 # Be sure that we know the target name
   7 [[ -z $1 ]] && exit
   8 TARGET=$1  # Remember the target build we are looking for
   9 MAKE_PPID=$2
  10
  11 declare -r  CSI=$'\e['  # DEC terminology, Control Sequence Introducer
  12 declare -r  CURSOR_OFF=${CSI}$'?25l'
  13 declare -r  CURSOR_ON=${CSI}$'?25h'
  14 declare -r  ERASE_LINE=${CSI}$'2K'
  15 declare -r  FRAME_OPEN=${CSI}$'2G['
  16 declare -r  FRAME_CLOSE=${CSI}$'63G]'
  17 declare -r  TS_POSITION=${CSI}$'65G'
  18 declare -r  LINE_WRAP_OFF=${CSI}$'?7l'
  19 declare -r  LINE_WRAP_ON=${CSI}$'?7h'
  20 declare -a  RESET_LINE=${CURSOR_OFF}${ERASE_LINE}${FRAME_OPEN}${FRAME_CLOSE}
  21
  22 declare -a  GRAPHIC_STR="| / - \\ + "
  23 declare -i  SEC=0  # Seconds accumulator
  24 declare -i  PREV_SEC=0
  25
  26 # Prevent segfault on stripping phases
  27 if [[ "$BASHBIN" = "/tools/bin/bash" ]] ; then
  28   SLEEP=/tools/bin/sleep
  29 elif [ -x /bin/sleep ] ; then
  30   SLEEP=/bin/sleep
  31 else
  32   SLEEP=/usr/bin/sleep
  33 fi
  34
  35 write_or_exit() {
  36     # make has been killed or failed or run to completion, leave
  37   [[ ! -e /proc/${MAKE_PPID} ]] && echo -n "${CURSOR_ON}" && exit
  38
  39     # Target build complete, leave.
  40   [[ -f ${TARGET} ]] && echo -n "${CURSOR_ON}" && exit
  41
  42     # It is safe to write to the screen
  43   echo -n "$1"
  44 }
  45
  46   # initialize screen
  47 write_or_exit "${RESET_LINE}${TS_POSITION}0 min. 0 sec"
  48
  49   # loop forever..
  50 while true ; do
  51
  52       # Loop through the animation string
  53     for GRAPHIC_CHAR in ${GRAPHIC_STR} ; do
  54       write_or_exit "${CSI}$((SEC + 3))G${GRAPHIC_CHAR}"
  55       $SLEEP .12 # This value MUST be less than .2 seconds.
  56     done
  57
  58       # A BASH internal variable, the number of seconds the script
  59       # has been running. modulo convert to 0-59
  60     SEC=$(($SECONDS % 60))
  61
  62       # Detect rollover of the seconds.
  63     (( PREV_SEC > SEC )) && write_or_exit "${RESET_LINE}"
  64     PREV_SEC=$SEC
  65
  66       # Display the accumulated time. div minutes.. modulo seconds.
  67     write_or_exit "${TS_POSITION}$(($SECONDS / 60)) min. $SEC sec"
  68 done
  69
  70 exit