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ceph-csi/vendor/sigs.k8s.io/kustomize/pkg/transformers/mutatefield.go
Madhu Rajanna d300da19b7 vendor update for E2E framework
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
2019-06-04 11:39:42 +05:30

82 lines
1.9 KiB
Go

/*
Copyright 2018 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package transformers
import (
"fmt"
"log"
"strings"
)
type mutateFunc func(interface{}) (interface{}, error)
func mutateField(
m map[string]interface{},
pathToField []string,
createIfNotPresent bool,
fns ...mutateFunc) error {
if len(pathToField) == 0 {
return nil
}
_, found := m[pathToField[0]]
if !found {
if !createIfNotPresent {
return nil
}
m[pathToField[0]] = map[string]interface{}{}
}
if len(pathToField) == 1 {
var err error
for _, fn := range fns {
m[pathToField[0]], err = fn(m[pathToField[0]])
if err != nil {
return err
}
}
return nil
}
v := m[pathToField[0]]
newPathToField := pathToField[1:]
switch typedV := v.(type) {
case nil:
log.Printf(
"nil value at `%s` ignored in mutation attempt",
strings.Join(pathToField, "."))
return nil
case map[string]interface{}:
return mutateField(typedV, newPathToField, createIfNotPresent, fns...)
case []interface{}:
for i := range typedV {
item := typedV[i]
typedItem, ok := item.(map[string]interface{})
if !ok {
return fmt.Errorf("%#v is expected to be %T", item, typedItem)
}
err := mutateField(typedItem, newPathToField, createIfNotPresent, fns...)
if err != nil {
return err
}
}
return nil
default:
return fmt.Errorf("%#v is not expected to be a primitive type", typedV)
}
}