#!/bin/sh
# SPDX-License-Identifier: GPL-2.0-or-later
#
# Finalize a release (possibly prepared with AI agent assistance)
# Amends the version bump commit to add Signed-off-by, then creates a
# signed annotated tag from the drafted tag message.

set -e

usage() {
	echo "Usage: $0 <tag-message-file>" >&2
	echo "" >&2
	echo "Run this from the repository root with VERSION.txt updated" >&2
	echo "and a draft tag message in given file." >&2
	exit 1
}

TAG_MSG_FILE="$1"
if [ -z "$TAG_MSG_FILE" ] || [ ! -f "$TAG_MSG_FILE" ]; then
	usage
fi

VERSION=$(cat VERSION.txt)
TAG="v${VERSION}"

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

HEAD_SUBJECT=$(git log -1 --format=%s)
EXPECTED="Bump version to $TAG"
if [ "$HEAD_SUBJECT" != "$EXPECTED" ]; then
	echo "Error: HEAD commit subject is:" >&2
	echo "  $HEAD_SUBJECT" >&2
	echo "Expected:" >&2
	echo "  $EXPECTED" >&2
	exit 1
fi

echo "Version:  $VERSION"
echo "Tag:      $TAG"
echo ""
echo "--- Tag message ---"
cat "$TAG_MSG_FILE"
echo "--- End tag message ---"
echo ""

printf "Proceed? [y/N] "
read answer
case "$answer" in
	y|Y) ;;
	*) echo "Aborted."; exit 1 ;;
esac

git commit --amend -s --no-edit
git tag -s "$TAG" -F "$TAG_MSG_FILE"

echo ""
echo "Created signed tag $TAG."
echo "Review with: git show $TAG"
echo ""

git push origin main "$TAG"
git push github main "$TAG"
git push gitlab main "$TAG"

SCRIPTDIR=$(dirname "$0")

printf "Upload to kernel.org via kup? [y/N] "
read answer
case "$answer" in
	y|Y) "$SCRIPTDIR/kup-dtc" "$VERSION" ;;
	*) echo "Skipping kup upload." ;;
esac

TAG_BODY=$(git tag -l --format='%(contents:body)' "$TAG")

ANNOUNCE="announce-${TAG}.txt"
cat > "$ANNOUNCE" <<MAIL
To: devicetree-compiler@vger.kernel.org
Subject: DTC $VERSION released

DTC $VERSION is now available.

Git tree:
  https://git.kernel.org/pub/scm/utils/dtc/dtc.git

Tagged release ($TAG):
  https://git.kernel.org/pub/scm/utils/dtc/dtc.git/tag/?h=$TAG

Tarball:
  https://kernel.org/pub/software/utils/dtc/dtc-${VERSION}.tar.gz

$TAG_BODY
MAIL

echo "Announcement draft written to $ANNOUNCE"