Manuel,
I found a few < gotcha's > in the code I sent you. Most are caused by
the lack of a synchronization between progress_bar and the makefile.
<progress_bar.sh> is asynchronous and there is not much that can be done.
The program wakes up, writes to the screen and then checks to see if
should exit. This is a problem if the target build completes while the
progress bar is asleep. The makefile outputs a trace for the next target
build and the screen text becomes messy.
I added some new traps and moved other completion traps around. The
screen stays clean now. (except that 'scroll-lock' will stall the
display and invalidate the counter)
George
#!/bin/bash
set -e
# Be sure that we know the target name
[[ -z $1 ]] && exit
declare -r CSI=$'\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' # Time Stamp
declare -a GRAPHIC_STR="| / - \\ . "
declare -i MIN=0 # Start value for minutes
declare -i POS=0 # Start value for seconds/cursor position
# Initialize the display line.
echo -n "\
${CURSOR_OFF}\
${ERASE_LINE}\
${FRAME_OPEN}\
${FRAME_CLOSE}\
${TS_POSITION}${MIN} min. ${POS} sec."
# A failsafe, target may be built
if [ ! -f $1 ] ; then
# While make is alive
while fuser -v . 2>&1 | grep make >/dev/null ; do
# A little animation at the current position
for i in ${GRAPHIC_STR} ; do
# If the target build is complete.. just leave
[[ -f $1 ]] && echo -n "${CURSOR_ON}" && exit
echo -ne "${CSI}$((${POS} +3))G$i"
sleep .2
# Don't miss default prompt if make fails while we were asleep
if ! fuser -v . 2>&1 | grep make >/dev/null ; then
echo -n "${CURSOR_ON}" && exit
fi
done
# Be sure to exit cleanly
# target may have completed while we were asleep
[[ -f $1 ]] && break
# Increment position and seconds counter
((POS++))
# Minutes counter
if [[ "$POS" = "60" ]] ; then
POS=0
((MIN++))
echo -n "${ERASE_LINE}${FRAME_OPEN}${FRAME_CLOSE}"
fi
# Display the accumulated time.
echo -n "${TS_POSITION}${MIN} min. ${POS} sec."
done
fi
echo -n "${CURSOR_ON}"
--
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