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// Copyright 2019 The Kubernetes Authors.
// SPDX-License-Identifier: Apache-2.0
//go:generate pluginator
package main
import (
"fmt"
"sigs.k8s.io/kustomize/api/resmap"
"sigs.k8s.io/kustomize/api/resource"
"sigs.k8s.io/kustomize/api/types"
"sigs.k8s.io/yaml"
)
type plugin struct {
loadedPatches []*resource.Resource
Paths []types.PatchStrategicMerge `json:"paths,omitempty" yaml:"paths,omitempty"`
Patches string `json:"patches,omitempty" yaml:"patches,omitempty"`
}
var KustomizePlugin plugin //nolint:gochecknoglobals
func (p *plugin) Config(
h *resmap.PluginHelpers, c []byte) (err error) {
err = yaml.Unmarshal(c, p)
if err != nil {
return err
}
if len(p.Paths) == 0 && p.Patches == "" {
return fmt.Errorf("empty file path and empty patch content")
}
if len(p.Paths) != 0 {
patches, err := loadFromPaths(h, p.Paths)
if err != nil {
return err
}
p.loadedPatches = append(p.loadedPatches, patches...)
}
if p.Patches != "" {
patches, err := h.ResmapFactory().RF().SliceFromBytes([]byte(p.Patches))
if err != nil {
return err
}
p.loadedPatches = append(p.loadedPatches, patches...)
}
if len(p.loadedPatches) == 0 {
return fmt.Errorf(
"patch appears to be empty; files=%v, Patch=%s", p.Paths, p.Patches)
}
return nil
}
func loadFromPaths(
h *resmap.PluginHelpers,
paths []types.PatchStrategicMerge) (
result []*resource.Resource, err error) {
var patches []*resource.Resource
for _, path := range paths {
// For legacy reasons, attempt to treat the path string as
// actual patch content.
patches, err = h.ResmapFactory().RF().SliceFromBytes([]byte(path))
if err != nil {
// Failing that, treat it as a file path.
patches, err = h.ResmapFactory().RF().SliceFromPatches(
h.Loader(), []types.PatchStrategicMerge{path})
if err != nil {
return
}
}
result = append(result, patches...)
}
return
}
func (p *plugin) Transform(m resmap.ResMap) error {
for _, patch := range p.loadedPatches {
target, err := m.GetById(patch.OrgId())
if err != nil {
return err
}
if err = m.ApplySmPatch(
resource.MakeIdSet([]*resource.Resource{target}), patch); err != nil {
return err
}
}
return nil
}
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