#!/bin/bash

# This script is a fucking tragedy.

PROJECT="how_is"

SCRIPT_DIR="$(dirname $(readlink -f $0))" # Directory this script is in.
cd "$SCRIPT_DIR/.."

LAST_RELEASE="$(git tag --list | cut -d 'v' -f 2 | sort -n | tail -n 1)"
NEXT_RELEASE=$(cat lib/$PROJECT/version.rb | grep '^\s*VERSION\s*=\s*' | cut -d '"' -f 2)

if [ -z "$LAST_RELEASE" ]; then
  echo "error: Could not find latest release using \`git tag --list\`"
  exit 1
fi

if [ -z "$NEXT_RELEASE" ]; then
  echo "error: No version number found in $(pwd)lib/$PROEJCT/version.rb."
  exit 1
fi

if [ "$LAST_RELEASE" == "$NEXT_RELEASE" ]; then
  echo "error: last release (\"$LAST_RELEASE\") and next release (\"$NEXT_RELEASE\") are equivalent."
  exit 1
fi

bundle exec github_changelog_generator --future-release "v$NEXT_RELEASE"