GIT: build a CSV with the number of file vs time

git-stats.sh

#!/bin/bash

OUTPUT=stats.csv

[ -f $OUTPUT ] || echo "date;sln;proj;cs;cpp" > $OUTPUT

count() {
	git ls-tree -r --name-only $COMMIT | grep -e $1 | wc -l | sed 's/ //g'
}

git log --pretty="%H %cd" --date=short | while read COMMIT DATE
do

	[ "$PREV_DATE" == "$DATE" ] && continue
	
	echo $DATE
	PREV_DATE="$DATE"

	SLN_COUNT=$(count ".*\.sln$")
	echo " $SLN_COUNT	solutions files"

	PROJ_COUNT=$(count ".*\.[a-z]*proj$")
	echo " $PROJ_COUNT	project files"

	CS_COUNT=$(count ".*\.cs$")
	echo " $CS_COUNT	C# files"

	CPP_COUNT=$(count ".*\.\(c\|cpp\|cc\|h\|hpp\|hh\)$")
	echo " $CPP_COUNT	C/C++ files"

	echo "$DATE;$SLN_COUNT;$PROJ_COUNT;$CS_COUNT;$CPP_COUNT" >> $OUTPUT 

done