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#!/usr/bin/env bash
# Copyright 2020 The Kubernetes Authors.
# Copyright 2021 The logr 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
#
# http://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 -o errexit
set -o nounset
set -o pipefail
function usage {
local script="$(basename $0)"
echo >&2 "Usage: ${script} [-r <branch|tag> | -d <dir>]
This script should be run at the root of a module.
-r <branch|tag>
Compare the exported API of the local working copy with the
exported API of the local repo at the specified branch or tag.
-d <dir>
Compare the exported API of the local working copy with the
exported API of the specified directory, which should point
to the root of a different version of the same module.
Examples:
${script} -r master
${script} -r v1.10.0
${script} -r release-1.10
${script} -d /path/to/historical/version
"
exit 1
}
ref=""
dir=""
while getopts r:d: o
do case "$o" in
r) ref="$OPTARG";;
d) dir="$OPTARG";;
[?]) usage;;
esac
done
# If REF and DIR are empty, print usage and error
if [[ -z "${ref}" && -z "${dir}" ]]; then
usage;
fi
# If REF and DIR are both set, print usage and error
if [[ -n "${ref}" && -n "${dir}" ]]; then
usage;
fi
if ! which apidiff > /dev/null; then
echo "Installing golang.org/x/exp/cmd/apidiff"
pushd "${TMPDIR:-/tmp}" > /dev/null
GO111MODULE=off go get golang.org/x/exp/cmd/apidiff
popd > /dev/null
fi
output=$(mktemp -d -t "apidiff.output.XXXX")
cleanup_output () { rm -fr "${output}"; }
trap cleanup_output EXIT
# If ref is set, clone . to temp dir at $ref, and set $dir to the temp dir
clone=""
base="${dir}"
if [[ -n "${ref}" ]]; then
base="${ref}"
clone=$(mktemp -d -t "apidiff.clone.XXXX")
cleanup_clone_and_output () { rm -fr "${clone}"; cleanup_output; }
trap cleanup_clone_and_output EXIT
git clone . -q --no-tags "${clone}"
git -C "${clone}" co "${ref}"
dir="${clone}"
fi
pushd "${dir}" >/dev/null
echo "Inspecting API of ${base}"
go list ./... > packages.txt
for pkg in $(cat packages.txt); do
mkdir -p "${output}/${pkg}"
apidiff -w "${output}/${pkg}/apidiff.output" "${pkg}"
done
popd >/dev/null
retval=0
echo "Comparing with ${base}"
for pkg in $(go list ./...); do
# New packages are ok
if [ ! -f "${output}/${pkg}/apidiff.output" ]; then
continue
fi
# Check for incompatible changes to previous packages
incompatible=$(apidiff -incompatible "${output}/${pkg}/apidiff.output" "${pkg}")
if [[ -n "${incompatible}" ]]; then
echo >&2 "FAIL: ${pkg} contains incompatible changes:
${incompatible}
"
retval=1
fi
done
# Check for removed packages
removed=$(comm -23 "${dir}/packages.txt" <(go list ./...))
if [[ -n "${removed}" ]]; then
echo >&2 "FAIL: removed packages:
${removed}
"
retval=1
fi
exit $retval