Merge pull request #328 from zmerlynn/container_build

CI: Add a simple build/squash/push script

docker/build-squash-push.sh

@@ -0,0 +1,52 @@
+#!/bin/bash
+
+set -o errexit
+set -o nounset
+set -o pipefail
+
+readonly DOCKER_ROOT=$(dirname "${BASH_SOURCE}")
+readonly GITISH=${BUILD_GITISH:-"$(git show-ref -s --abbrev HEAD)"}
+readonly ARCH=${BUILD_ARCH:-"linux/amd64"}
+readonly NAME=${BUILD_NAME:-"ci-${GITISH}-${ARCH/\//-}"} # e.g. ci-bef7faf-linux-amd64
+readonly TMPNAME="${NAME}-$(date +%s)" # e.g. ci-bef7faf-linux-amd64-12345678
+readonly TAG=${BUILD_TAG:-"b.gcr.io/kops-ci/kops:${NAME}"}
+readonly TMPTAG="${TAG}-$(date +%s)"
+readonly LINK=${BUILD_LINK:-} # Also pushes to e.g. ci-{BUILD_LINK}-linux-amd64, i.e. for "latest"
+readonly SYMBOLIC_TAG=${BUILD_TAG:-"b.gcr.io/kops-ci/kops:ci-${LINK}-${ARCH/\//-}"}
+
+if [[ "${ARCH}" != "linux/amd64" ]]; then
+  echo "!!! Alternate architecture build not supported yet. !!!"
+  exit 1
+fi
+
+echo
+echo "=== Building at ${GITISH} for ${ARCH} (note: unable to build unpushed changes) ==="
+echo
+
+# Build -> $TMPTAG
+docker build -t "${TMPTAG}" --build-arg "KOPS_GITISH=${GITISH}" --build-arg "KUBECTL_ARCH=${ARCH}" --force-rm=true --rm=true --pull=true --no-cache=true "${DOCKER_ROOT}"
+
+# Squash -> $TAG
+docker create --name="${TMPNAME}" "${TMPTAG}"
+docker export "${TMPNAME}" | docker import - "${TAG}"
+gcloud docker push "${TAG}"
+
+echo
+echo "=== Pushed ${TAG} ==="
+echo
+
+if [[ -n "${LINK}" ]]; then
+  docker tag "${TAG}" "${SYMBOLIC_TAG}"
+  gcloud docker push "${SYMBOLIC_TAG}"
+  echo
+  echo "=== Pushed ${SYMBOLIC_TAG} ==="
+  echo
+fi
+
+echo "=== Cleaning up ==="
+echo
+docker rm "${TMPNAME}"
+docker rmi -f "${TAG}" "${TMPTAG}"
+if [[ -n "${LINK}" ]]; then
+  docker rmi -f "${SYMBOLIC_TAG}"
+fi