Helm template typescript function

Author: prachirp

tests/e2e.sh

@@ -40,11 +40,24 @@ function testcase() {
   cd "${tmp}"
 }
 
+function helm_testcase() {
+  echo "testcase: ${1}"
+  tmp=$(mktemp -d "/tmp/e2e.${1}.XXXXXXXX")
+  cp -r "${REPO}"/example-configs "${tmp}"
+  cd "${tmp}"
+  git clone -q https://github.com/bitnami/charts.git
+}
+
 function fail() {
   echo "FAIL: " "$@"
   exit 1
 }
 
+function assert_contains_string() {
+  content="$(<"$1")"
+  grep -q "$2" "$1" || fail "String $2 not contained in: ${content}"
+}
+
 function assert_empty_list() {
   content="$(<"$1")"
   [[ ${content} = "${EMPTY_OUTPUT}" ]] || fail "Not empty list: ${content}"
@@ -118,6 +131,40 @@ assert_dir_exists payments-dev
 assert_dir_exists payments-prod
 grep -q allowPrivilegeEscalation podsecuritypolicy_psp.yaml
 
+helm_testcase "node_helm_template_command_line_args"
+node "${DIST}"/helm_template_run.js -i /dev/null -d name=my-chart -d chart_path=charts/bitnami/redis/ >out.yaml
+assert_contains_string out.yaml "my-chart"
+
+helm_testcase "node_helm_template_function_config_args"
+cat >fc.yaml <<EOF
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: my-config
+  annotations:
+    config.k8s.io/function: |
+      container:
+        image:  gcr.io/kpt-functions/helm-template
+    config.kubernetes.io/local-config: "true"
+data:
+  name: my-chart
+  chart_path: charts/bitnami/redis
+EOF
+node "${DIST}"/helm_template_run.js -i /dev/null -f fc.yaml >out.yaml
+assert_contains_string out.yaml "my-chart"
+
+helm_testcase "node_helm_template_undefined_args"
+node "${DIST}"/helm_template_run.js -i /dev/null 2>err.txt || true
+assert_contains_string err.txt "Error: functionConfig expected, instead undefined"
+
+helm_testcase "node_helm_template_transform_funct"
+node "${DIST}"/read_yaml_run.js -i /dev/null -d source_dir="$(pwd)"/example-configs |
+  node "${DIST}"/helm_template_run.js -i /dev/null -d name=my-chart -d chart_path=charts/bitnami/redis/ |
+  node "${DIST}"/write_yaml_run.js -o /dev/null -d sink_dir="$(pwd)"/example-configs -d overwrite=true
+assert_dir_exists example-configs/shipping-dev
+assert_dir_exists example-configs/default
+grep -q "name: my-chart-redis-master" example-configs/default/service_my-chart-redis-master.yaml
+
 ############################
 # Docker Tests
 ############################

ts/demo-functions/build/helm_template.Dockerfile

@@ -0,0 +1,36 @@
+FROM node:10-alpine as builder
+
+RUN mkdir -p /home/node/app && \
+    chown -R node:node /home/node/app
+
+USER node
+
+WORKDIR /home/node/app
+
+# Install dependencies and cache them.
+COPY --chown=node:node package*.json ./
+RUN npm ci
+
+# Build the source.
+COPY --chown=node:node tsconfig.json .
+COPY --chown=node:node src src
+RUN npm run build && \
+    npm prune --production && \
+    rm -r src tsconfig.json
+
+#############################################
+
+FROM alpine/helm:3.2.1
+
+WORKDIR /home/node/app
+
+COPY --from=builder /home/node/app /home/node/app
+
+RUN apk add bash curl git
+RUN apk update
+
+RUN curl -fsSL -o /usr/local/bin/kpt https://storage.googleapis.com/kpt-dev/latest/linux_amd64/kpt
+RUN chmod +x /usr/local/bin/kpt
+ENV PATH /usr/local/bin:$PATH
+
+ENTRYPOINT ["node", "/home/node/app/dist/helm_template_run.js"]