fix(build): add build script

scripts/build-go.sh

+#!/usr/bin/env bash
+set -o errexit
+set -o pipefail
+
+[[ "$TRACE" ]] && set -x
+
+readonly REPO=github.com/kubernetes/deployment-manager
+readonly DIR="${GOPATH}/src/${REPO}"
+
+source "${DIR}/scripts/common.sh"
+
+if [[ -z "${VERSION:-}" ]]; then
+  VERSION=$(version_from_git)
+fi
+
+LDFLAGS="-s -X ${REPO}/pkg/version.DeploymentManagerVersion=${VERSION}"
+
+echo "Build version: ${VERSION}"
+
+build_binaries "$@"
+
+exit 0

scripts/common.sh

+#!/usr/bin/env bash
+set -o errexit
+set -o pipefail
+
+readonly ALL_TARGETS=(cmd/dm cmd/expandybird cmd/manager cmd/resourcifier)
+
+error_exit() {
+  # Display error message and exit
+  echo "error: ${1:-"unknown error"}" 1>&2
+  exit 1
+}
+
+version_from_git() {
+  local git_tag=$(git describe --tags --abbrev=0 2>/dev/null)
+  local git_commit=$(git rev-parse --short HEAD)
+  echo "${git_tag}+${git_commit}"
+}
+
+build_binary_cross() {
+  local target="$1"
+
+  echo "Building ${target}"
+  gox -verbose \
+    -ldflags="${LDFLAGS}" \
+    -os="linux darwin" \
+    -arch="amd64 386" \
+    -output="bin/{{.OS}}-{{.Arch}}/{{.Dir}}" "${REPO}/${target}"
+}
+
+build_binaries() {
+  local -a targets=($@)
+
+  if [[ ${#targets[@]} -eq 0 ]]; then
+    targets=("${ALL_TARGETS[@]}")
+  fi
+
+  for t in "${targets[@]}"; do
+    build_binary "$t"
+  done
+}
+
+build_binary() {
+  local target="$1"
+  local binary="${target##*/}"
+  local outfile="bin/${binary}"
+
+  echo "Building ${target}"
+  go build -o "$outfile" -ldflags "$LDFLAGS" "${REPO}/${target}"
+}