hey

plugin/someteam.example.com/v1/ChartInflatorExec

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+#!/bin/bash
+set -e
+
+# Helm chart inflator
+
+# Reads a file like this
+#
+#  apiVersion: kustomize.config.k8s.io/v1
+#  kind: ChartInflatorExec
+#  metadata:
+#    name: notImportantHere
+#  chartName: nameOfStableChart
+#  values: /abs/path/to/local/values/file
+#  chartHome: /abs/path/local/chart/storage
+#  helmHome: /abs/path/to/helm/config
+#  helmBin: /abs/path/to/helmBin
+#
+# fetches the given chart from stable/$chartName,
+# and inflates it to stdout, using the given values file.
+#
+# chartDir default: $TMP_DIR/charts
+# chartDir default:
+
+# Example execution:
+# ./plugins/kustomize.config.k8s.io/v1/ChartInflatorExec configFile.yaml
+
+
+# Yaml parsing is a ridiculous thing to do in bash,
+# but let's try:
+function parseYaml {
+  local file=$1
+  while read -r line
+  do
+    local k=${line%:*}
+    local v=${line#*:}
+
+    [ "$k" == "chartName" ] && chartName=$v
+    [ "$k" == "chartHome" ] && chartHome=$v
+    [ "$k" == "values" ] && valuesFile=$v
+    [ "$k" == "helmHome" ] && helmHome=$v
+    [ "$k" == "helmBin" ] && helmBin=$v
+  done <"$file"
+
+  # Trim leading space
+  chartName="${chartName#"${chartName%%[![:space:]]*}"}"
+  chartHome="${chartHome#"${chartHome%%[![:space:]]*}"}"
+  valuesFile="${valuesFile#"${valuesFile%%[![:space:]]*}"}"
+  helmBin="${helmBin#"${helmBin%%[![:space:]]*}"}"
+}
+
+TMP_DIR=$(mktemp -d)
+
+parseYaml $1
+
+# Where all the files generated by 'helm init' live.
+if [ -z "$helmHome" ]; then
+  helmHome=$TMP_DIR/dotHelm
+fi
+
+# Where helm charts are unpacked.
+if [ -z "$chartHome" ]; then
+  chartHome=$TMP_DIR/charts
+fi
+
+if [ -z "$helmBin" ]; then
+  helmBin=helm
+fi
+
+if [ -z "$valuesFile" ]; then
+  valuesFile=$chartHome/$chartName/values.yaml
+fi
+
+function doHelm {
+  $helmBin --home $helmHome $@
+}
+
+# The init command is extremely chatty
+doHelm init --client-only >& /dev/null
+
+if [ ! -d "$chartHome/$chartName" ]; then
+  doHelm fetch --untar \
+      --untardir $chartHome \
+      stable/$chartName
+fi
+
+doHelm template \
+    --values $valuesFile \
+    $chartHome/$chartName
+
+/bin/rm -rf $TMP_DIR