#!/bin/sh
#
# ProcMake 0.2: a GNU Make wrapper which produces a progress report.
# 2004-04-25 groundzero@zuavra.net http://software.zuavra.net/procmake/
#
# ProcMake is free to use and to distribute further, as long as no
# modifications are made upon it. I make no guarantees for its effects
# and functionality. By using it you assume all the responsability for
# the outcome.
#
# The following options are customizable.
BAR_WIDTH=50

# From this point forward, do not modify anything unless you know
# what you're doing.
TSTART=`date +%s`

# function to draw a percentage bar
function drawbar() {
  if (( BARS < BAR_WIDTH )); then
    echo -en "\033[1G"
    echo -n "["
    PAR=${1:-0}
    BARS=$((BAR_WIDTH*PAR/100))
    for i in `seq 1 1 $BARS 2>/dev/null`; do
      echo -n "="
    done
    for i in `seq 1 1 $((BAR_WIDTH-BARS)) 2>/dev/null`; do
      echo -n " "
    done
    echo -n "] ${PAR}%  "
  fi
}

# function to transform seconds in hours-minutes-seconds
function showtime() {
  TIME=${1:-0}
  SECS=$((TIME%3600))
  HOURS=$(((TIME-SECS)/3600))
  TIME=$SECS
  SECS=$((TIME%60))
  MINS=$(((TIME-SECS)/60))
  echo "${HOURS}h ${MINS}m ${SECS}s"
}

# the simulation run
echo -n "Counting marker lines ... "
TOTAL=`make -dnk ${@} 2>&1|grep -i "Finished prerequisites"|wc -l|tr -d "[:space:]"`
echo "expecting $TOTAL marker lines."

# the real run
PARTIAL=0
OLD=0
drawbar 0
make -d ${@} 2>&1|grep -i "Finished prerequisites"|\
while read LINE; do
  PARTIAL=$((PARTIAL+1))
  NEW=$((PARTIAL*100/TOTAL))
  if [ "$OLD" != "$NEW" ]; then
    drawbar $NEW
  fi
  OLD=$NEW
done
RET=${PIPESTATUS[0]}
echo

# output results
TSTOP=`date +%s`
echo -n "It took `showtime $((TSTOP-TSTART))`, "
echo "and make returned code ${RET}."
exit $RET