#!/bin/bash
set -e
NEW="$1"

[ "$NEW" != "" ] || exit 1

echo "Creating release $NEW"


if git describe "$NEW" &>/dev/null; then
  echo "Release already exists"
  exit 1
fi

NEWBASE=`echo "$NEW"|cut -f1 -d'-'`
PREV=`git tag --sort=creatordate|grep "^$NEWBASE"|tail -1`

############## update Release_notes.txt
NOTES="dist/Release_notes.txt"
echo "-------------------------------------------------" > "$NOTES.new"
echo "Changes in release $NEW (since $PREV)" >> "$NOTES.new"
echo "-------------------------------------------------" >> "$NOTES.new"
echo -e "\nRelease date: `date`\n" >> "$NOTES.new"

git shortlog --no-merges $PREV..HEAD >> "$NOTES.new"

echo >> "$NOTES.new"
cat "$NOTES" >> "$NOTES.new"
mv "$NOTES.new" "$NOTES"

git add "$NOTES"
git commit -m "automatically updated release notes for $NEW"


################ tag and add tag message
echo > /tmp/tagmessage
echo "Release $NEW" >> /tmp/tagmessage
echo >> /tmp/tagmessage
echo "Changes in $NEW (since $PREV):" >> /tmp/tagmessage
echo >> /tmp/tagmessage
git shortlog --no-merges $PREV..HEAD >> /tmp/tagmessage
git tag -a "$NEW" -m "`cat /tmp/tagmessage`"


################ push everything
git push origin HEAD
git push --tags