#!/bin/sh
#
# creates a SLOC graph through the revisions
# give path to repo a first arg
# output is generated in the current directory
# requires: git, sloccount, gnuplot
#
# markus schnalke <meillo@marmaro.de>
# 2012-04

tmprepo=sloc-$$
slocdata=sloc-$$-data
output=sloc-$$.png

if [ $# -ne 1 ] ; then
	echo "usage: $0 GIT-REPO" >&2
	exit 1
fi

git clone "$1" "$tmprepo" >/dev/null
cd "$tmprepo"

for i in `git log | grep ^commit |cut -d' ' -f2| tac` ; do
	git checkout $i >/dev/null 2>&1
	sloc=`sloccount . | awk '/^ansic/{print $2}'`
	echo "$sloc $i"
done | awk '{ print NR, $0 }' >"../$slocdata"

gnuplot <<!
set title "nmh/mmh lines of code"
set yrange [0:]
set xlabel 'revision'
set ylabel 'SLOC'
set xtics ("mmh birth" 697)
set grid
set terminal png
set output "../$output"
plot "../$slocdata" using 1:2 with points title ""
!