#!/bin/sh
# helper script to prepare a release

if [ -z "$1" ]; then
	echo 'pass the release version number' >&2
	exit 1
fi
if echo $1 | grep -v '[0-9\.]' >/dev/null; then
	echo 'invalid release number, try something like "1.2"' >&2
	exit 1
fi

ver=$1
name=$(pwd | xargs basename)
fullname=$name-$ver

if git tag | grep "^v$ver$" >/dev/null; then
	echo "release tag v$ver already exists" >&2
	exit 1
fi

echo "tagging v$ver ..."
git tag v$ver
echo "preparing tarball: $fullname.tar.gz ..."
git archive -o $fullname.tar.gz --prefix=$fullname/ v$ver

# fixup VER in the configure script
echo "fixing up version in configure script to not rely on git ..."
orig_pwd=`pwd`
mkdir -p /tmp/mkrelfix
cd /tmp/mkrelfix
tar xzvf $orig_pwd/$fullname.tar.gz
sed -i "s/^VER=.*/VER=$ver/" $fullname/configure
# also while we're at it, remove this script too
rm -f $fullname/`basename $0`
tar czvf $orig_pwd/$fullname.tar.gz $fullname

echo
echo "Done. If there was some mistake delete the tag with: git tag -d v$ver"
echo 'Otherwise, push the new tag with: git push --tags, and upload the tarball.'