#!/bin/bash

# Copyright 2018 The Kubernetes 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

declare -a mandatory
mandatory=(
  PKG
  ARCH
  GIT_COMMIT
  REPO_INFO
  TAG
)

missing=false
for var in "${mandatory[@]}"; do
  if [[ -z "${!var:-}" ]]; then
    echo "Environment variable $var must be set"
    missing=true
  fi
done

if [ "$missing" = true ]; then
  exit 1
fi

export CGO_ENABLED=0

go build \
    ${GOBUILD_FLAGS} \
    -ldflags "-s -w \
        -X ${PKG}/version.RELEASE=${TAG} \
        -X ${PKG}/version.COMMIT=${GIT_COMMIT} \
        -X ${PKG}/version.REPO=${REPO_INFO}" \
    -o bin/${ARCH}/nginx-ingress-controller ${PKG}/cmd/nginx