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MahiroOS-jhalfs/common/progress_bar.sh

70 lines
1.9 KiB
Bash

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