#!/usr/bin/env bash
# Bash script to prepare a release using git-cliff.
# Inspired by https://github.com/orhun/git-cliff/blob/main/release.sh

if [ "$#" -ne 1 ]; then
    echo "A version tag is required."
    echo "Example: bash $0 1.5.0"
    exit 1
fi

VERSION_TAG=$1

# Update CHANGELOG.
git cliff --tag "$VERSION_TAG" -o CHANGELOG.md

# Add all changes and commit.
git add -A
git commit -m "🔖 chore(release): prepare for $VERSION_TAG"

# Template for the tag description.
export GIT_CLIFF_TEMPLATE="\
    {% for group, commits in commits | group_by(attribute=\"group\") %}\
    {{ group | striptags | trim | upper_first }}\
    {% for commit in commits %}\
        - {% if commit.breaking %}(**‼️BREAKING‼️**) {% endif %}{{ commit.message | upper_first }} ({{ commit.id | truncate(length=7, end=\"\") }})\
    {% endfor %}\
    {% endfor %}"

# Generate the tag description.
changelog=$(git cliff --tag "$VERSION_TAG" --unreleased --strip all)

# Create a signed and annotated tag.
git tag -s -a "$VERSION_TAG" -m "Release $VERSION_TAG" -m "$changelog"

echo "Most recent commit:"
git log -1
echo
echo "Information for tag $VERSION_TAG:"
git show $VERSION_TAG
echo

echo "Release $VERSION_TAG is ready. Don't forget to push the changes and the tag:"
echo "git push && git push --tags"