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replacement.go
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replacement.go
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// Copyright 2021 The Kubernetes Authors.
// SPDX-License-Identifier: Apache-2.0
package types
import (
"fmt"
"strings"
"sigs.k8s.io/kustomize/kyaml/resid"
)
const DefaultReplacementFieldPath = "metadata.name"
// Replacement defines how to perform a substitution
// where it is from and where it is to.
type Replacement struct {
// The source of the value.
Source *SourceSelector `json:"source,omitempty" yaml:"source,omitempty"`
// The N fields to write the value to.
Targets []*TargetSelector `json:"targets,omitempty" yaml:"targets,omitempty"`
}
// SourceSelector is the source of the replacement transformer.
type SourceSelector struct {
// A specific object to read it from.
resid.ResId `json:",inline,omitempty" yaml:",inline,omitempty"`
// Structured field path expected in the allowed object.
FieldPath string `json:"fieldPath,omitempty" yaml:"fieldPath,omitempty"`
// Used to refine the interpretation of the field.
Options *FieldOptions `json:"options,omitempty" yaml:"options,omitempty"`
}
func (s *SourceSelector) String() string {
if s == nil {
return ""
}
result := []string{s.ResId.String()}
if s.FieldPath != "" {
result = append(result, s.FieldPath)
}
if opts := s.Options.String(); opts != "" {
result = append(result, opts)
}
return strings.Join(result, ":")
}
// TargetSelector specifies fields in one or more objects.
type TargetSelector struct {
// Include objects that match this.
Select *Selector `json:"select" yaml:"select"`
// From the allowed set, remove objects that match this.
Reject []*Selector `json:"reject,omitempty" yaml:"reject,omitempty"`
// Structured field paths expected in each allowed object.
FieldPaths []string `json:"fieldPaths,omitempty" yaml:"fieldPaths,omitempty"`
// Used to refine the interpretation of the field.
Options *FieldOptions `json:"options,omitempty" yaml:"options,omitempty"`
}
// FieldOptions refine the interpretation of FieldPaths.
type FieldOptions struct {
// Used to split/join the field.
Delimiter string `json:"delimiter,omitempty" yaml:"delimiter,omitempty"`
// Which position in the split to consider.
Index int `json:"index,omitempty" yaml:"index,omitempty"`
// TODO (#3492): Implement use of this option
// None, Base64, URL, Hex, etc
Encoding string `json:"encoding,omitempty" yaml:"encoding,omitempty"`
// If field missing, add it.
Create bool `json:"create,omitempty" yaml:"create,omitempty"`
}
func (fo *FieldOptions) String() string {
if fo == nil || (fo.Delimiter == "" && !fo.Create) {
return ""
}
return fmt.Sprintf("%s(%d), create=%t", fo.Delimiter, fo.Index, fo.Create)
}