#!/usr/bin/env bash
# Makes a release: tags the current commit `vMAJOR.MINOR.PATCH` and builds the package for it (package.sh).
# Usage: deploy/release.sh patch|minor|major|X.Y.Z [--push]
#   patch/minor/major count up from the latest release tag (v0.0.0 if there is none yet).
#   --push also pushes the tag to origin.
set -euo pipefail

root="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
deploy="$root/deploy"
bump="${1:-}"
push="${2:-}"

if [[ -z "$bump" ]]; then
    echo "Usage: deploy/release.sh patch|minor|major|X.Y.Z [--push]" >&2
    exit 1
fi

if [[ -n "$(git -C "$root" status --porcelain)" ]]; then
    echo "The working tree has uncommitted changes; commit or stash them first." >&2
    exit 1
fi

latest="$(git -C "$root" describe --tags --abbrev=0 --match 'v[0-9]*' 2>/dev/null || echo v0.0.0)"
IFS=. read -r major minor patch <<< "${latest#v}"

case "$bump" in
    major) next="$((major + 1)).0.0" ;;
    minor) next="$major.$((minor + 1)).0" ;;
    patch) next="$major.$minor.$((patch + 1))" ;;
    *)
        if [[ ! "$bump" =~ ^[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
            echo "'$bump' is neither patch, minor, major nor a version like 1.2.3." >&2
            exit 1
        fi
        next="$bump"
        ;;
esac

if git -C "$root" rev-parse -q --verify "refs/tags/v$next" > /dev/null; then
    echo "The tag v$next exists already." >&2
    exit 1
fi

echo "Releasing $next (latest was ${latest#v})."
git -C "$root" tag -a "v$next" -m "Release $next"

if [[ "$push" == "--push" ]]; then
    git -C "$root" push origin "v$next"
fi

"$deploy/package.sh" "$next"