#!/usr/bin/env bash 
# Copyright © 2025-2026 Apple Inc. and the Containerization project authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#   https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

set -euo pipefail

if command -v .local/bin/hawkeye >/dev/null 2>&1; then
    echo "hawkeye already installed"
    exit 0
fi

# This installer supports Apple silicon (arm64 macOS) only.
if [ "$(uname -s)" != "Darwin" ] || [ "$(uname -m)" != "arm64" ]; then
    echo "error: install-hawkeye.sh supports Apple silicon (arm64 macOS) only" >&2
    exit 1
fi

VERSION=v6.5.1
ARTIFACT="hawkeye-aarch64-apple-darwin.tar.xz"
ARTIFACT_URL="https://github.com/korandoru/hawkeye/releases/download/${VERSION}/${ARTIFACT}"
# Pinned SHA-256 of ${ARTIFACT} for ${VERSION}; update when bumping VERSION.
EXPECTED_SHA256="99777f21e4e56c9946ed93621885532c6a0476377f497565c583f5911f2cbb1f"

echo "Installing hawkeye ${VERSION}"
workdir="$(mktemp -d)"
trap 'rm -rf "${workdir}"' EXIT
tarball="${workdir}/${ARTIFACT}"

# Download the tarball, verify it against the pinned checksum (aborts on
# mismatch), then extract just the hawkeye binary into .local/bin.
curl --proto '=https' --tlsv1.2 -LsSf "${ARTIFACT_URL}" -o "${tarball}"
echo "${EXPECTED_SHA256}  ${tarball}" | shasum -a 256 -c -

tar -xf "${tarball}" --strip-components 1 -C "${workdir}"
mkdir -p .local/bin
mv "${workdir}/hawkeye" .local/bin/hawkeye
chmod +x .local/bin/hawkeye

echo "hawkeye ${VERSION} installed to .local/bin/hawkeye"