62 lines
1.7 KiB
Bash
Executable file
62 lines
1.7 KiB
Bash
Executable file
#!/bin/bash
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# $Id$
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set -e
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# Be sure that we know the taget name
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[[ -z $1 ]] && exit
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TARGET=$1 # Remember the target build we are looking for
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MAKE_PPID=$2
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declare -r CSI=$'\e[' # DEC terminology, Control Sequence Introducer
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declare -r CURSOR_OFF=${CSI}$'?25l'
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declare -r CURSOR_ON=${CSI}$'?25h'
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declare -r ERASE_LINE=${CSI}$'2K'
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declare -r FRAME_OPEN=${CSI}$'2G['
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declare -r FRAME_CLOSE=${CSI}$'63G]'
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declare -r TS_POSITION=${CSI}$'65G'
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declare -r LINE_WRAP_OFF=${CSI}$'?7l'
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declare -r LINE_WRAP_ON=${CSI}$'?7h'
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declare -a RESET_LINE=${CURSOR_OFF}${ERASE_LINE}${FRAME_OPEN}${FRAME_CLOSE}
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declare -a GRAPHIC_STR="| / - \\ + "
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declare -i SEC=0 # Seconds accumulator
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declare -i PREV_SEC=0
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write_or_exit() {
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# make has been killed or failed or run to completion, leave
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[[ ! -e /proc/${MAKE_PPID} ]] && echo -n "${CURSOR_ON}" && exit
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# Target build complete, leave.
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[[ -f ${TARGET} ]] && echo -n "${CURSOR_ON}" && exit
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# It is safe to write to the screen
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echo -n "$1"
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}
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# initialize screen
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write_or_exit "${RESET_LINE}${TS_POSITION}0 min. 0 sec"
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# loop forever..
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while true ; do
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# Loop through the animation string
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for GRAPHIC_CHAR in ${GRAPHIC_STR} ; do
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write_or_exit "${CSI}$((SEC + 3))G${GRAPHIC_CHAR}"
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sleep .12 # This value MUST be less than .2 seconds.
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done
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# A BASH internal variable, the number of seconds the script
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# has been running. modulo convert to 0-59
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SEC=$(($SECONDS % 60))
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# Detect rollover of the seconds.
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(( PREV_SEC > SEC )) && write_or_exit "${RESET_LINE}"
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(( PREV_SEC = SEC ))
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# Display the accumulated time. div minutes.. modulo seconds.
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write_or_exit "${TS_POSITION}$(($SECONDS / 60)) min. $SEC sec"
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done
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exit
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