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https://github.com/TECHNOFAB11/kubenix.git
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52 lines
1.5 KiB
Nix
52 lines
1.5 KiB
Nix
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{ stdenvNoCC, lib, kubernetes-helm, gawk, remarshal, jq }:
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with lib;
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{
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# chart to template
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chart
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# release name
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, name
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# namespace to install release into
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, namespace ? null
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# values to pass to chart
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, values ? {}
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# kubernetes version to template chart for
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, kubeVersion ? null }: let
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valuesJsonFile = builtins.toFile "${name}-values.json" (builtins.toJSON values);
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in stdenvNoCC.mkDerivation {
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name = "${name}.json";
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buildCommand = ''
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# template helm file and write resources to yaml
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helm template --name "${name}" \
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${optionalString (kubeVersion != null) "--kube-version ${kubeVersion}"} \
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${optionalString (namespace != null) "--namespace ${namespace}"} \
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${optionalString (values != {}) "-f ${valuesJsonFile}"} \
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${chart} >resources.yaml
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# split multy yaml file into multiple files
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awk 'BEGIN{i=1}{line[i++]=$0}END{j=1;n=0; while (j<i) {if (line[j] ~ /^---/) n++; else print line[j] >>"resource-"n".yaml"; j++}}' resources.yaml
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# join multiple yaml files in jsonl file
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for file in ./resource-*.yaml
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do
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remarshal -i $file -if yaml -of json >>resources.jsonl
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done
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# convert jsonl file to json array, remove null values and write to $out
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cat resources.jsonl | jq -Scs 'walk(
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if type == "object" then
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with_entries(select(.value != null))
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elif type == "array" then
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map(select(. != null))
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else
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.
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end)' > $out
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'';
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nativeBuildInputs = [ kubernetes-helm gawk remarshal jq ];
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}
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