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#!/bin/bash
##===----------------------------------------------------------------------===##
##
## This source file is part of the SwiftCrypto open source project
##
## Copyright (c) 2019-2022 Apple Inc. and the SwiftCrypto project authors
## Licensed under Apache License v2.0
##
## See LICENSE.txt for license information
## See CONTRIBUTORS.md for the list of SwiftCrypto project authors
##
## SPDX-License-Identifier: Apache-2.0
##
##===----------------------------------------------------------------------===##
set -eu
function usage() {
echo >&2 "Usage: $0 REPO-GITHUB-URL NEW-VERSION OLD-VERSIONS..."
echo >&2
echo >&2 "This script requires a Swift 5.6+ toolchain."
echo >&2
echo >&2 "Examples:"
echo >&2
echo >&2 "Check between main and tag 2.0.5 of swift-crypto:"
echo >&2 " $0 https://github.com/apple/swift-crypto main 2.0.5"
echo >&2
echo >&2 "Check between HEAD and commit 64cf63d7 using the provided toolchain:"
echo >&2 " xcrun --toolchain org.swift.5120190702a $0 ../some-local-repo HEAD 64cf63d7"
}
if [[ $# -lt 3 ]]; then
usage
exit 1
fi
tmpdir=$(mktemp -d /tmp/.check-api_XXXXXX)
repo_url=$1
new_tag=$2
shift 2
repodir="$tmpdir/repo"
git clone "$repo_url" "$repodir"
git -C "$repodir" fetch -q origin '+refs/pull/*:refs/remotes/origin/pr/*'
cd "$repodir"
git checkout -q "$new_tag"
for old_tag in "$@"; do
echo "Checking public API breakages from $old_tag to $new_tag"
swift package diagnose-api-breaking-changes "$old_tag"
done
echo done
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