#!/bin/sh
#
# growthplot -- plot the fetchmail project's growth as a function of time
#
# Get data from the NEWS file
timeseries >/tmp/growthplot$$
grep "^[0-9]" /tmp/growthplot$$ >/tmp/growthnumbers$$
grep "^[0-9.]*.[05].0 " /tmp/growthplot$$ >/tmp/growthmajors$$
sed '/^4.2.9/,$d' </tmp/growthnumbers$$ >/tmp/growthannounce$$
cat >/tmp/growthimage$$ <<EOF
set title "Fetchmail project growth history"
set xlabel 'Days since baseline'
set ylabel 'Participants'
set y2label 'Lines of code'
set ytics nomirror
set y2tics
set tics out
set autoscale y
set y2range [5000:50000]
set key bottom right box
set terminal png color
EOF
# OK, now write the event labels
(
count=0
lastday=0
breakheight=510
while read version legend
do
if [ "$version" = '%' ]
then
echo "# Associate $lastday to '$legend'"
count=$((count+1))
lastday=$(($lastday-5))
endy=$((breakheight+50+count*50))
if ((endy>lasttotal))
then
# Label over curve hanging right, arrow down
arrowhead=$((lasttotal+50))
echo "set label '$legend' at $lastday-10, $endy+15"
else
# Label under curve hanging left, arrow up
arrowhead=$((lasttotal-5))
strlen=`python -c "print len('$legend')"`
lablen=$((strlen*22))
echo "set label '$legend' at $lastday-$lablen+10, $endy-15"
fi
echo set arrow \
from $lastday, $endy \
to $lastday, $arrowhead \
head
else
set -- $legend
size=$1
friends=$2
announce=$3
total=$4
days=$5
date=$6
lastday=$days
lasttotal=$total
fi
done
) </tmp/growthplot$$ >>/tmp/growthimage$$
# OK, now write the major-release labels
(
while read version size friends announce total days date
do
echo "set arrow from $days, $total - 55 to $days, $total - 15 head"
echo "set label '$version' at $days - 5, $total - 65"
done
) </tmp/growthmajors$$ >>/tmp/growthimage$$
cat >>/tmp/growthimage$$ <<EOF
plot [] [0:] '/tmp/growthnumbers$$' using 6:5 \
title "Both lists" with points 3, \
'/tmp/growthannounce$$' using 6:4 \
title "fetchmail-announce" with points 5, \
'/tmp/growthannounce$$' using 6:3 \
title "fetchmail-friends" with points 2, \
'/tmp/growthnumbers$$' using 6:2 axes x1y2 \
title "Lines of code" with points 7
EOF
gnuplot /tmp/growthimage$$ >growth.png
rm -f /tmp/growth*
# growthplot ends here
