#!/bin/bash
#
# Count number of commits per user and per versions (using date for version detection)
#
# shellcheck disable=1113,2002,2006,2086,2164,2219

Releases=("3.9" "4.0" "5.0" "6.0" "7.0" "8.0" "9.0" "10.0" "11.0" "12.0" "13.0" "14.0" "15.0" "16.0" "17.0" "18.0" "19.0" "develop")
let "counter = 0"

echo "Copy script into /tmp/github_commits_byversion.sh"
cp $0 /tmp/github_commits_perversion.sh

echo "Delete /tmp/git"
rm -fr /tmp/git
echo "Create and go into /tmp/git"
mkdir /tmp/git
cd /tmp/git
git clone https://github.com/Dolibarr/dolibarr.git

cd /tmp/git/dolibarr

firstline=1
for i in "${Releases[@]}"
do
	if [ $firstline -eq 1 ]; then
		firstline=0
		continue
	fi

	#echo "=== Version $i (counter $counter):"
	echo "=== Version $i (counter $counter):"
	echo "Get common commit ID between origin/${Releases[counter]} and origin/${Releases[counter+1]}"
	echo "git merge-base origin/${Releases[counter]} origin/${Releases[counter+1]}"
	commitidcommon=`git merge-base origin/${Releases[counter]} origin/${Releases[counter+1]}`
	echo "Found commitid=$commitidcommon"

	echo "Checkout into version $i"
	git checkout $i
	#git shortlog -s -n  --after=YYYY-MM-DD --before=YYYY-MM-DD | tr '[:lower:]' '[:upper:]' > /tmp/github_commits_perversion.txt
	git shortlog -s -n $commitidcommon..  | iconv -f UTF-8 -t ASCII//TRANSLIT | tr '[:lower:]' '[:upper:]' > /tmp/github_commits_perversion.txt
	#cat /tmp/github_commits_perversion.txt
	echo "Total for version $i:"
	echo -n "- Nb of commits: "
	git log $commitidcommon.. --pretty=oneline | tr '[:lower:]' '[:upper:]' > /tmp/github_commits_perversion2.txt
	cat /tmp/github_commits_perversion2.txt | wc -l
	echo -n "- Nb of different authors: "
	awk ' { print $2 } ' < /tmp/github_commits_perversion.txt | sort -u | wc -l
	echo "======================="
	echo
	let "counter +=1"
done