get-build-ld-flags.sh

#!/usr/bin/env bash
#
# Copyright 2018 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
#
# 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 -e

PACKAGE_PATH="${1:-k8s.io/component-base}"
VERSION_PATH="${2:-$(dirname $0)/../VERSION}"
PROGRAM_NAME="${3:-Gardener}"
VERSION_VERSIONFILE="$(cat "$VERSION_PATH")"
VERSION="${EFFECTIVE_VERSION:-$VERSION_VERSIONFILE}"

MAJOR_VERSION=""
MINOR_VERSION=""

if [[ "${VERSION}" =~ ^v([0-9]+)\.([0-9]+)(\.[0-9]+)?([-].*)?([+].*)?$ ]]; then
  MAJOR_VERSION=${BASH_REMATCH[1]}
  MINOR_VERSION=${BASH_REMATCH[2]}
  if [[ -n "${BASH_REMATCH[4]}" ]]; then
    MINOR_VERSION+="+"
  fi
fi

# .dockerignore ignores all files unrelevant for build (e.g. docs) to only copy relevant source files to the build
# container. Hence, git will always detect a dirty work tree when building in a container (many deleted files).
# This command filters out all deleted files that are ignored by .dockerignore to only detect changes to relevant files
# as a dirty work tree.
# Additionally, it filters out changes to the `VERSION` file, as this is currently the only way to inject the
# version-to-build in our pipelines (see https://github.com/gardener/cc-utils/issues/431).
TREE_STATE="$([ -z "$(git status --porcelain 2>/dev/null | grep -vf <(git ls-files -o --deleted --ignored --exclude-from=.dockerignore) -e 'VERSION')" ] && echo clean || echo dirty)"

echo "-X $PACKAGE_PATH/version.gitMajor=$MAJOR_VERSION
      -X $PACKAGE_PATH/version.gitMinor=$MINOR_VERSION
      -X $PACKAGE_PATH/version.gitVersion=$VERSION
      -X $PACKAGE_PATH/version.gitTreeState=$TREE_STATE
      -X $PACKAGE_PATH/version.gitCommit=$(git rev-parse --verify HEAD)
      -X $PACKAGE_PATH/version.buildDate=$(date '+%Y-%m-%dT%H:%M:%S%z' | sed 's/\([0-9][0-9]\)$/:\1/g')
      -X $PACKAGE_PATH/version/verflag.programName=$PROGRAM_NAME"