#!/bin/sh
# SPDX-License-Identifier: GPL-2.0-or-later
#
# Prepare a release: update VERSION.txt and create the version bump
# commit.  This handles steps 1 and 2 of the release procedure in
# AGENTS.md.  Step 3 (drafting the tag message) requires judgement to
# categorise and summarise changes, so is left to the caller.

set -e

usage() {
	echo "Usage: $0 <version>" >&2
	echo "" >&2
	echo "  version   X.Y.Z or vX.Y.Z" >&2
	echo "" >&2
	echo "Example: $0 1.8.1" >&2
	exit 1
}

RAW="$1"
if [ -z "$RAW" ]; then
	usage
fi

VERSION="${RAW#v}"

case "$VERSION" in
	[0-9]*.[0-9]*.[0-9]*)
		;;
	*)
		echo "Error: version '$VERSION' does not look like X.Y.Z" >&2
		exit 1
		;;
esac

TAG="v${VERSION}"

if git rev-parse "$TAG" >/dev/null 2>&1; then
	echo "Error: tag $TAG already exists" >&2
	exit 1
fi

if ! git diff-index --quiet HEAD; then
	echo "Error: working tree is dirty; commit or stash first" >&2
	exit 1
fi

echo "$VERSION" > VERSION.txt
git add VERSION.txt
git commit -m "$(cat <<EOF
Bump version to $TAG

Prepare for a new release.
EOF
)"

echo "Building with make..."
git clean -fdx
make check

echo ""
echo "Building with meson..."
git clean -fdx
meson setup build
meson test -C build

echo ""
echo "All builds and tests passed."
echo "Next: draft the tag message to tag-message.txt, then run:"
echo "  scripts/finalize-release tag-message.txt"