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empty.go
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empty.go
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package transformers
import (
"github.com/ContainerSolutions/helm-convert/pkg/types"
ktypes "sigs.k8s.io/kustomize/pkg/types"
)
type emptyTransformer struct{}
var _ Transformer = &emptyTransformer{}
// NewEmptyTransformer constructs an emptyTransformer
func NewEmptyTransformer() Transformer {
return &emptyTransformer{}
}
// Transform remove empty maps from manifests (ie: empty labels, resources, etc.)
func (t *emptyTransformer) Transform(config *ktypes.Kustomization, resources *types.Resources) error {
for id := range resources.ResMap {
obj := resources.ResMap[id].Map()
_, err := t.emptyRecursive(obj)
if err != nil {
continue
}
}
return nil
}
func (t *emptyTransformer) emptyRecursive(obj map[string]interface{}) (bool, error) {
for key := range obj {
switch typedV := obj[key].(type) {
case map[string]interface{}:
if len(typedV) == 0 {
delete(obj, key)
} else {
d, err := t.emptyRecursive(typedV)
if err != nil {
return false, err
}
if d {
delete(obj, key)
}
}
case []interface{}:
for i := range typedV {
item := typedV[i]
typedItem, ok := item.(map[string]interface{})
if ok {
d, err := t.emptyRecursive(typedItem)
if err != nil {
return false, err
}
if d {
delete(obj, key)
}
}
}
// Remove keys with nil value
case nil:
delete(obj, key)
}
}
return len(obj) == 0, nil
}