Add support for versions in dockerized build.

build/build-image/Dockerfile

@@ -62,5 +62,8 @@ RUN touch /kube-build-image
 
 WORKDIR /go/src/github.com/GoogleCloudPlatform/kubernetes
 
+# Propagate the git tree version into the build image
+ADD kube-version-defs /kube-version-defs
+
 # Upload Kubernetes source
 ADD kube-source.tar.gz /go/src/github.com/GoogleCloudPlatform/kubernetes

build/build-image/common.sh

@@ -25,7 +25,13 @@ readonly KUBE_GO_PACKAGE=github.com/GoogleCloudPlatform/kubernetes
 mkdir -p "${KUBE_TARGET}"
 
 if [[ ! -f "/kube-build-image" ]]; then
-  echo "WARNING: This script should be run in the kube-build conrtainer image!" >&2
+  echo "WARNING: This script should be run in the kube-build container image!" >&2
+fi
+
+if [[ -f "/kube-version-defs" ]]; then
+  source "/kube-version-defs"
+else
+  echo "WARNING: No version information provided in build image"
 fi
 
 function make-binary() {
@@ -34,7 +40,7 @@ function make-binary() {
 
   echo "+++ Building ${bin} for ${GOOS}/${GOARCH}"
   pushd "${KUBE_REPO_ROOT}"
-  godep go build -o "${ARCH_TARGET}/${bin}" "${gopkg}"
+  godep go build -ldflags "${KUBE_LD_FLAGS-}" -o "${ARCH_TARGET}/${bin}" "${gopkg}"
   popd
 }
 

build/common.sh

@@ -17,6 +17,9 @@
 # Common utilties, variables and checks for all build scripts.
 
 cd $(dirname "${BASH_SOURCE}")/..
+
+source hack/config-go.sh
+
 readonly KUBE_REPO_ROOT="${PWD}"
 
 readonly KUBE_GIT_BRANCH=$(git rev-parse --abbrev-ref HEAD 2>/dev/null)
@@ -105,6 +108,9 @@ function kube::build::build-image() {
   )
   mkdir -p ${BUILD_CONTEXT_DIR}
   tar czf ${BUILD_CONTEXT_DIR}/kube-source.tar.gz "${SOURCE[@]}"
+  cat >${BUILD_CONTEXT_DIR}/kube-version-defs <<EOF
+KUBE_LD_FLAGS="$(kube::version_ldflags)"
+EOF
   cp build/build-image/Dockerfile ${BUILD_CONTEXT_DIR}/Dockerfile
   kube::build::docker-build "${KUBE_BUILD_IMAGE}" "${BUILD_CONTEXT_DIR}"
 }
@@ -139,6 +145,9 @@ function kube::build::clean-images() {
   for b in "${KUBE_RUN_BINARIES[@]}" ; do
     kube::build::clean-image "${KUBE_RUN_IMAGE_BASE}-${b}"
   done
+
+  echo "+++ Cleaning all other untagged docker images"
+  docker rmi $(docker images | grep "^<none>" | awk '{print $3}') 2> /dev/null
 }
 
 # Build a docker image from a Dockerfile.