Factor out testing code from charts (#1)

* [WIP] Factor out testing code from charts

* Minor various fixes

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* Start readme

* Update readme and add GKE example

* Add CircleCI job for ShellCheck

* Install Helm and kubectl after other tools

Also: Hard-code version for kubectl.

* Fix readme

* Update maintainer validation

'chartlib::validate_maintainers' should not log an error if there's no maintainers
section. This is already covered by the schema validation.

* Add random suffix to namespaces

* Improve container logs output

* Improve logging

* Add --cleanup flag to 'helm test'

* Improve namespace cleanup

* Improve logging

* Add random suffixes to releases

* Update logging and Docker image version

* Update GKE example

* Fix Bash array declarations

* Remove user from Docker image

* Add summary

* Use kubectl rollout status for deployments

* Add some more fixes

* Build dependencies before linting

* Fix array initialization

* Increase sleep time for namespace polling

* Add missing colon

* Create v1.0.0

* Update Helm to v2.9.1

* Add missing local keywords

* Bump image version

* Update copyright headers

examples/gke/Dockerfile

@@ -0,0 +1,30 @@
+# Copyright 2018 The Helm Authors. All rights reserved.
+#
+# 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.
+
+FROM gcr.io/kubernetes-charts-ci/chart-testing:v1.0.2
+
+ENV PATH /google-cloud-sdk/bin:$PATH
+ARG CLOUD_SDK_VERSION=200.0.0
+RUN curl -LO "https://dl.google.com/dl/cloudsdk/channels/rapid/downloads/google-cloud-sdk-$CLOUD_SDK_VERSION-linux-x86_64.tar.gz" && \
+    tar xzf "google-cloud-sdk-$CLOUD_SDK_VERSION-linux-x86_64.tar.gz" && \
+    rm "google-cloud-sdk-$CLOUD_SDK_VERSION-linux-x86_64.tar.gz" && \
+    ln -s /lib /lib64 && \
+    rm -rf /google-cloud-sdk/.install/.backup && \
+    gcloud version
+
+RUN gcloud config set core/disable_usage_reporting true && \
+    gcloud config set component_manager/disable_update_check true && \
+    gcloud config set metrics/environment github_docker_image
+
+WORKDIR /workdir

examples/gke/my_test.sh

@@ -0,0 +1,43 @@
+#!/usr/bin/env bash
+
+# Copyright 2018 The Helm Authors. All rights reserved.
+#
+# 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
+
+readonly IMAGE_REPOSITORY="myrepo/chart-testing"
+readonly REPO_ROOT="${REPO_ROOT:-$(git rev-parse --show-toplevel)}"
+
+main() {
+    local config_container_id
+    config_container_id=$(docker run -ti -d \
+        -v "$GOOGLE_APPLICATION_CREDENTIALS:/service-account.json" \
+        -v "$REPO_ROOT:/workdir" \
+        -e "BUILD_ID=$PULL_NUMBER" \
+        "$IMAGE_REPOSITORY:$IMAGE_TAG" cat)
+
+    # shellcheck disable=SC2064
+    trap "docker rm -f $config_container_id" EXIT
+
+    docker exec "$config_container_id" gcloud auth activate-service-account --key-file /service-account.json
+    docker exec "$config_container_id" gcloud container clusters get-credentials my-cluster --project my-project --zone us-west1-a
+    docker exec "$config_container_id" kubectl cluster-info
+    docker exec "$config_container_id" chart_test.sh --config /workdir/.testenv
+
+    echo "Done Testing!"
+}
+
+main