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