add shellcheck lint script

hack/.shellcheck_failures

+./build/build-image/rsyncd.sh
+./build/common.sh
+./build/copy-output.sh
+./build/lib/release.sh
+./build/make-build-image.sh
+./build/make-clean.sh
+./build/package-tarballs.sh
+./build/release-images.sh
+./build/release-in-a-container.sh
+./build/release.sh
+./build/run.sh
+./build/shell.sh
+./build/util.sh
+./cluster/addons/addon-manager/kube-addons.sh
+./cluster/addons/fluentd-elasticsearch/es-image/run.sh
+./cluster/addons/fluentd-elasticsearch/fluentd-es-image/run.sh
+./cluster/centos/build.sh
+./cluster/centos/config-build.sh
+./cluster/centos/config-default.sh
+./cluster/centos/config-test.sh
+./cluster/centos/deployAddons.sh
+./cluster/centos/make-ca-cert.sh
+./cluster/centos/master/scripts/flannel.sh
+./cluster/centos/node/bin/mk-docker-opts.sh
+./cluster/centos/node/scripts/flannel.sh
+./cluster/centos/util.sh
+./cluster/clientbin.sh
+./cluster/common.sh
+./cluster/gce/config-common.sh
+./cluster/gce/config-default.sh
+./cluster/gce/config-test.sh
+./cluster/gce/delete-stranded-load-balancers.sh
+./cluster/gce/gci/configure-helper.sh
+./cluster/gce/gci/configure.sh
+./cluster/gce/gci/flexvolume_node_setup.sh
+./cluster/gce/gci/health-monitor.sh
+./cluster/gce/gci/master-helper.sh
+./cluster/gce/gci/mounter/stage-upload.sh
+./cluster/gce/gci/node-helper.sh
+./cluster/gce/gci/shutdown.sh
+./cluster/gce/list-resources.sh
+./cluster/gce/upgrade-aliases.sh
+./cluster/gce/upgrade.sh
+./cluster/gce/util.sh
+./cluster/get-kube-binaries.sh
+./cluster/get-kube-local.sh
+./cluster/get-kube.sh
+./cluster/images/etcd-empty-dir-cleanup/etcd-empty-dir-cleanup.sh
+./cluster/juju/prereqs/ubuntu-juju.sh
+./cluster/juju/util.sh
+./cluster/kube-down.sh
+./cluster/kube-up.sh
+./cluster/kube-util.sh
+./cluster/kubeadm.sh
+./cluster/kubectl.sh
+./cluster/kubemark/gce/config-default.sh
+./cluster/kubemark/iks/config-default.sh
+./cluster/kubemark/util.sh
+./cluster/local/util.sh
+./cluster/log-dump/log-dump.sh
+./cluster/pre-existing/util.sh
+./cluster/restore-from-backup.sh
+./cluster/test-e2e.sh
+./cluster/test-network.sh
+./cluster/test-smoke.sh
+./cluster/update-storage-objects.sh
+./cluster/validate-cluster.sh
+./hack/benchmark-go.sh
+./hack/build-cross.sh
+./hack/build-go.sh
+./hack/build-ui.sh
+./hack/cherry_pick_pull.sh
+./hack/dev-build-and-push.sh
+./hack/dev-build-and-up.sh
+./hack/dev-push-hyperkube.sh
+./hack/e2e-internal/e2e-cluster-size.sh
+./hack/e2e-internal/e2e-down.sh
+./hack/e2e-internal/e2e-grow-cluster.sh
+./hack/e2e-internal/e2e-shrink-cluster.sh
+./hack/e2e-internal/e2e-status.sh
+./hack/e2e-internal/e2e-up.sh
+./hack/e2e-node-test.sh
+./hack/gen-swagger-doc/gen-swagger-docs.sh
+./hack/generate-bindata.sh
+./hack/generate-docs.sh
+./hack/get-build.sh
+./hack/ginkgo-e2e.sh
+./hack/godep-restore.sh
+./hack/godep-save.sh
+./hack/grab-profiles.sh
+./hack/install-etcd.sh
+./hack/jenkins/benchmark-dockerized.sh
+./hack/jenkins/build.sh
+./hack/jenkins/test-dockerized.sh
+./hack/jenkins/upload-to-gcs.sh
+./hack/jenkins/verify-dockerized.sh
+./hack/lib/etcd.sh
+./hack/lib/golang.sh
+./hack/lib/init.sh
+./hack/lib/logging.sh
+./hack/lib/protoc.sh
+./hack/lib/swagger.sh
+./hack/lib/test.sh
+./hack/lib/util.sh
+./hack/lib/version.sh
+./hack/list-feature-tests.sh
+./hack/local-up-cluster.sh
+./hack/make-rules/build.sh
+./hack/make-rules/clean.sh
+./hack/make-rules/cross.sh
+./hack/make-rules/helpers/cache_go_dirs.sh
+./hack/make-rules/make-help.sh
+./hack/make-rules/test-cmd.sh
+./hack/make-rules/test-e2e-node.sh
+./hack/make-rules/test-integration.sh
+./hack/make-rules/test-kubeadm-cmd.sh
+./hack/make-rules/test.sh
+./hack/make-rules/update.sh
+./hack/make-rules/verify.sh
+./hack/make-rules/vet.sh
+./hack/print-workspace-status.sh
+./hack/run-in-gopath.sh
+./hack/test-go.sh
+./hack/test-integration.sh
+./hack/test-update-storage-objects.sh
+./hack/update-all.sh
+./hack/update-api-reference-docs.sh
+./hack/update-bazel.sh
+./hack/update-cloudprovider-gce.sh
+./hack/update-codegen.sh
+./hack/update-generated-device-plugin-dockerized.sh
+./hack/update-generated-device-plugin.sh
+./hack/update-generated-docs.sh
+./hack/update-generated-kms-dockerized.sh
+./hack/update-generated-kms.sh
+./hack/update-generated-kubelet-plugin-registration-dockerized.sh
+./hack/update-generated-kubelet-plugin-registration.sh
+./hack/update-generated-protobuf-dockerized.sh
+./hack/update-generated-protobuf.sh
+./hack/update-generated-runtime-dockerized.sh
+./hack/update-generated-runtime.sh
+./hack/update-generated-swagger-docs.sh
+./hack/update-godep-licenses.sh
+./hack/update-gofmt.sh
+./hack/update-openapi-spec.sh
+./hack/update-staging-godeps-dockerized.sh
+./hack/update-staging-godeps.sh
+./hack/update-swagger-spec.sh
+./hack/update-translations.sh
+./hack/update-workspace-mirror.sh
+./hack/verify-all.sh
+./hack/verify-api-groups.sh
+./hack/verify-api-reference-docs.sh
+./hack/verify-bazel.sh
+./hack/verify-boilerplate.sh
+./hack/verify-cli-conventions.sh
+./hack/verify-cloudprovider-gce.sh
+./hack/verify-codegen.sh
+./hack/verify-description.sh
+./hack/verify-generated-device-plugin.sh
+./hack/verify-generated-docs.sh
+./hack/verify-generated-files-remake.sh
+./hack/verify-generated-files.sh
+./hack/verify-generated-kms.sh
+./hack/verify-generated-kubelet-plugin-registration.sh
+./hack/verify-generated-protobuf.sh
+./hack/verify-generated-runtime.sh
+./hack/verify-generated-swagger-docs.sh
+./hack/verify-godep-licenses.sh
+./hack/verify-godeps.sh
+./hack/verify-gofmt.sh
+./hack/verify-golint.sh
+./hack/verify-govet.sh
+./hack/verify-import-boss.sh
+./hack/verify-imports.sh
+./hack/verify-linkcheck.sh
+./hack/verify-no-vendor-cycles.sh
+./hack/verify-openapi-spec.sh
+./hack/verify-pkg-names.sh
+./hack/verify-readonly-packages.sh
+./hack/verify-spelling.sh
+./hack/verify-staging-godeps.sh
+./hack/verify-staging-meta-files.sh
+./hack/verify-swagger-spec.sh
+./hack/verify-symbols.sh
+./hack/verify-test-images.sh
+./hack/verify-test-owners.sh
+./hack/verify-typecheck.sh
+./pkg/kubectl/cmd/testdata/edit/record_testcase.sh
+./pkg/util/verify-util-pkg.sh
+./plugin/pkg/admission/imagepolicy/gencerts.sh
+./staging/src/k8s.io/apiextensions-apiserver/examples/client-go/hack/update-codegen.sh
+./staging/src/k8s.io/apiextensions-apiserver/examples/client-go/hack/verify-codegen.sh
+./staging/src/k8s.io/apiextensions-apiserver/hack/build-image.sh
+./staging/src/k8s.io/apiextensions-apiserver/hack/update-codegen.sh
+./staging/src/k8s.io/apiextensions-apiserver/hack/verify-codegen.sh
+./staging/src/k8s.io/apiserver/pkg/admission/plugin/webhook/testcerts/gencerts.sh
+./staging/src/k8s.io/apiserver/pkg/util/webhook/gencerts.sh
+./staging/src/k8s.io/apiserver/plugin/pkg/authenticator/token/oidc/testdata/gen.sh
+./staging/src/k8s.io/apiserver/plugin/pkg/authorizer/webhook/gencerts.sh
+./staging/src/k8s.io/code-generator/generate-groups.sh
+./staging/src/k8s.io/code-generator/generate-internal-groups.sh
+./staging/src/k8s.io/code-generator/hack/update-codegen.sh
+./staging/src/k8s.io/code-generator/hack/verify-codegen.sh
+./staging/src/k8s.io/csi-api/hack/update-codegen.sh
+./staging/src/k8s.io/csi-api/hack/verify-codegen.sh
+./staging/src/k8s.io/kube-aggregator/hack/build-image.sh
+./staging/src/k8s.io/kube-aggregator/hack/local-up-kube-aggregator.sh
+./staging/src/k8s.io/kube-aggregator/hack/register-all-apis-from.sh
+./staging/src/k8s.io/kube-aggregator/hack/update-codegen.sh
+./staging/src/k8s.io/kube-aggregator/hack/verify-codegen.sh
+./staging/src/k8s.io/metrics/hack/update-codegen.sh
+./staging/src/k8s.io/metrics/hack/verify-codegen.sh
+./staging/src/k8s.io/sample-apiserver/hack/build-image.sh
+./staging/src/k8s.io/sample-apiserver/hack/update-codegen.sh
+./staging/src/k8s.io/sample-apiserver/hack/verify-codegen.sh
+./staging/src/k8s.io/sample-controller/hack/update-codegen.sh
+./staging/src/k8s.io/sample-controller/hack/verify-codegen.sh
+./test/cmd/apply.sh
+./test/cmd/apps.sh
+./test/cmd/authorization.sh
+./test/cmd/batch.sh
+./test/cmd/certificate.sh
+./test/cmd/core.sh
+./test/cmd/crd.sh
+./test/cmd/create.sh
+./test/cmd/discovery.sh
+./test/cmd/generic-resources.sh
+./test/cmd/get.sh
+./test/cmd/initializers.sh
+./test/cmd/legacy-script.sh
+./test/cmd/node-management.sh
+./test/cmd/old-print.sh
+./test/cmd/proxy.sh
+./test/cmd/rbac.sh
+./test/cmd/request-timeout.sh
+./test/cmd/run.sh
+./test/cmd/save-config.sh
+./test/cmd/storage.sh
+./test/cmd/template-output.sh
+./test/cmd/version.sh
+./test/e2e_node/conformance/run_test.sh
+./test/e2e_node/environment/setup_host.sh
+./test/e2e_node/gubernator.sh
+./test/e2e_node/jenkins/conformance/conformance-jenkins.sh
+./test/e2e_node/jenkins/copy-e2e-image.sh
+./test/e2e_node/jenkins/e2e-node-jenkins.sh
+./test/e2e_node/jenkins/ubuntu-14.04-nvidia-install.sh
+./test/images/image-util.sh
+./test/images/pets/redis-installer/on-start.sh
+./test/images/pets/zookeeper-installer/install.sh
+./test/images/pets/zookeeper-installer/on-start.sh
+./test/images/volume/gluster/run_gluster.sh
+./test/images/volume/iscsi/create_block.sh
+./test/images/volume/nfs/run_nfs.sh
+./test/images/volume/rbd/bootstrap.sh
+./test/images/volume/rbd/create_block.sh
+./test/images/volume/rbd/mon.sh
+./test/images/volume/rbd/osd.sh
+./test/integration/ipamperf/test-performance.sh
+./test/integration/scheduler_perf/test-performance.sh
+./test/kubemark/common/util.sh
+./test/kubemark/configure-kubectl.sh
+./test/kubemark/gce/util.sh
+./test/kubemark/iks/shutdown.sh
+./test/kubemark/iks/startup.sh
+./test/kubemark/iks/util.sh
+./test/kubemark/master-log-dump.sh
+./test/kubemark/pre-existing/util.sh
+./test/kubemark/resources/start-kubemark-master.sh
+./test/kubemark/run-e2e-tests.sh
+./test/kubemark/start-kubemark.sh
+./test/kubemark/stop-kubemark.sh
+./third_party/forked/shell2junit/sh2ju.sh
+./third_party/intemp/intemp.sh

hack/verify-shellcheck.sh

+#!/usr/bin/env 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
+
+KUBE_ROOT=$(dirname "${BASH_SOURCE[0]}")/..
+source "${KUBE_ROOT}/hack/lib/init.sh"
+
+
+# disabled lints
+disabled=(
+  # this lint dissalows non-constant source, which we use extensively
+  1090
+  # this lint prefers command -v to which, they are not the same
+  2230
+)
+# comma separate for passing to shellcheck
+join_by() {
+  local IFS="$1";
+  shift;
+  echo "$*";
+}
+SHELLCHECK_DISABLED="$(join_by , "${disabled[@]}")"
+readonly SHELLCHECK_DISABLED
+
+if ! which shellcheck > /dev/null; then
+  echo 'Can not find shellcheck, please install shellcheck to run this script'
+  echo 'see: https://github.com/koalaman/shellcheck#installing'
+  # TODO(bentheelder): we should discuss how to better handle this
+  exit 1
+fi
+
+cd "${KUBE_ROOT}"
+
+# find all shell scripts excluding ./_* and ./vendor*
+all_shell_scripts=()
+while IFS=$'\n' read -r script;
+  do all_shell_scripts+=("$script");
+done < <(find . -name "*.sh" \
+  -not \( \
+    -path ./_\*      -o \
+    -path ./vendor\*    \
+  \))
+
+# make sure known failures are sorted
+failure_file="${KUBE_ROOT}/hack/.shellcheck_failures"
+if ! diff -u "${failure_file}" <(LC_ALL=C sort "${failure_file}"); then
+  {
+    echo
+    echo "hack/.shellcheck_failures is not in alphabetical order. Please sort it:"
+    echo
+    echo "  LC_ALL=C sort -o hack/.shellcheck_failures hack/.shellcheck_failures"
+    echo
+  } >&2
+  false
+fi
+
+# load known failure files
+failing_files=()
+while IFS=$'\n' read -r script;
+  do failing_files+=("$script");
+done < <(cat "${failure_file}")
+
+# TODO(bentheelder): we should probably move this and the copy in verify-golint.sh
+# to one of the bash libs
+array_contains () {
+  local seeking=$1; shift # shift will iterate through the array
+  local in=1 # in holds the exit status for the function
+  for element; do
+    if [[ "$element" == "$seeking" ]]; then
+      in=0 # set in to 0 since we found it
+      break
+    fi
+  done
+  return $in
+}
+
+# lint each script, tracking failures
+errors=()
+not_failing=()
+for f in "${all_shell_scripts[@]}"; do
+  set +o errexit
+  failedLint=$(shellcheck --exclude="${SHELLCHECK_DISABLED}" "${f}")
+  set -o errexit
+  array_contains "${f}" "${failing_files[@]}" && in_failing=$? || in_failing=$?
+  if [[ -n "${failedLint}" ]] && [[ "${in_failing}" -ne "0" ]]; then
+    errors+=( "${failedLint}" )
+  fi
+  if [[ -z "${failedLint}" ]] && [[ "${in_failing}" -eq "0" ]]; then
+    not_failing+=( "${f}" )
+  fi
+done
+
+# Check to be sure all the packages that should pass lint are.
+if [ ${#errors[@]} -eq 0 ]; then
+  echo 'Congratulations!  All shell files have been linted.'
+else
+  {
+    echo "Errors from shellcheck:"
+    for err in "${errors[@]}"; do
+      echo "$err"
+    done
+    echo
+    echo 'Please review the above warnings. You can test via "./hack/verify-shellcheck"'
+    echo 'If the above warnings do not make sense, you can exempt this package from shellcheck'
+    echo 'checking by adding it to hack/.shellcheck_failures (if your reviewer is okay with it).'
+    echo
+  } >&2
+  false
+fi
+
+if [[ ${#not_failing[@]} -gt 0 ]]; then
+  {
+    echo "Some packages in hack/.shellcheck_failures are passing shellcheck. Please remove them."
+    echo
+    for f in "${not_failing[@]}"; do
+      echo "  $f"
+    done
+    echo
+  } >&2
+  false
+fi
+
+# Check that all failing_packages actually still exist
+gone=()
+for f in "${failing_files[@]}"; do
+  array_contains "$f" "${all_shell_scripts[@]}" || gone+=( "$f" )
+done
+
+if [[ ${#gone[@]} -gt 0 ]]; then
+  {
+    echo "Some files in hack/.shellcheck_failures do not exist anymore. Please remove them."
+    echo
+    for f in "${gone[@]}"; do
+      echo "  $f"
+    done
+    echo
+  } >&2
+  false
+fi