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e77a3898de
Remarshal doesn’t seem to be maintained anymore. It is also affected by upstream bugs like https://github.com/yaml/pyyaml/issues/89 which affects e.g. prometheus-operator CRDs.
46 lines
1.4 KiB
Nix
46 lines
1.4 KiB
Nix
{
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runCommand,
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lib,
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kubernetes-helm,
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yq,
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}:
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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,
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# whether to include CRD
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includeCRDs ? false,
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# whether to include hooks
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noHooks ? false,
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}: let
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valuesJsonFile = builtins.toFile "${name}-values.json" (builtins.toJSON values);
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# The `helm template` and YAML -> JSON steps are separate `runCommand` derivations for easier debuggability
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resourcesYaml = runCommand "${name}.yaml" {nativeBuildInputs = [kubernetes-helm];} ''
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helm template "${name}" \
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${optionalString (kubeVersion != null) "--kube-version ${kubeVersion}"} \
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${optionalString (namespace != null) "--namespace ${namespace}"} \
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${optionalString (values != {}) "-f ${valuesJsonFile}"} \
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${optionalString includeCRDs "--include-crds"} \
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${optionalString noHooks "--no-hooks"} \
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${chart} >$out
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'';
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in
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runCommand "${name}.json" {} ''
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# Remove null values
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${yq}/bin/yq -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)' ${resourcesYaml} >$out
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''
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