implement ResourceGenerator and change call the accumulateResources f…

…unction to ResourceGenerator

api/export/target.go

@@ -0,0 +1,33 @@
+package export
+
+import (
+	"fmt"
+
+	"sigs.k8s.io/kustomize/api/internal/accumulator"
+	"sigs.k8s.io/kustomize/api/internal/target"
+	"sigs.k8s.io/kustomize/api/resmap"
+)
+
+type KustTarget target.KustTarget
+
+func (kt *KustTarget) AccumulateTarget() (*accumulator.ResAccumulator, error) {
+	internalKt := (*target.KustTarget)(kt)
+	ra, err := internalKt.AccumulateTarget()
+	if err != nil {
+		return nil, fmt.Errorf("%w", err)
+	}
+	return ra, nil
+}
+
+func (kt *KustTarget) Accumulate() (resmap.ResMap, error) {
+	internalKt := (*target.KustTarget)(kt)
+	_, err := internalKt.AccumulateTarget()
+	if err != nil {
+		return nil, fmt.Errorf("%w", err)
+	}
+	resmap, err := internalKt.MakeCustomizedResMap()
+	if err != nil {
+		return nil, fmt.Errorf("%w", err)
+	}
+	return resmap, nil
+}

api/internal/accumulator/resaccumulator.go

@@ -14,9 +14,8 @@ import (
 	"sigs.k8s.io/kustomize/kyaml/resid"
 )
 
-// ResAccumulator accumulates resources and the rules
-// used to customize those resources.  It's a ResMap
-// plus stuff needed to modify the ResMap.
+// ResAccumulator accumulates resources and the rules used to customize those resources.
+// It's a ResMap plus stuff needed to modify the ResMap.
 type ResAccumulator struct {
 	resMap  resmap.ResMap
 	tConfig *builtinconfig.TransformerConfig

api/internal/plugins/execplugin/execplugin_test.go

@@ -25,7 +25,7 @@ func TestExecPluginConfig(t *testing.T) {
 	err := fSys.WriteFile("sed-input.txt", []byte(`
 s/$FOO/foo/g
 s/$BAR/bar baz/g
- \ \ \ 
+ \ \ \
 `))
 	require.NoError(t, err)
 	ldr, err := fLdr.NewLoader(
@@ -65,7 +65,7 @@ s/$BAR/bar baz/g
 		t.Fatalf("unexpected err: %v", err)
 	}
 	err = p.Config(
-		resmap.NewPluginHelpers(ldr, pvd.GetFieldValidator(), rf, pc),
+		resmap.NewPluginHelpers(ldr, pvd.GetFieldValidator(), rf, pc, nil), //TODO
 		yaml)
 	require.NoError(t, err)
 

api/internal/plugins/loader/loader.go

@@ -218,7 +218,7 @@ func (l *Loader) loadAndConfigurePlugin(
 	if err != nil {
 		return nil, errors.WrapPrefixf(err, "marshalling yaml from res %s", res.OrgId())
 	}
-	err = c.Config(resmap.NewPluginHelpers(ldr, v, l.rf, l.pc), yaml)
+	err = c.Config(resmap.NewPluginHelpers(ldr, v, l.rf, l.pc, nil), yaml) //TODO
 	if err != nil {
 		return nil, errors.WrapPrefixf(
 			err, "plugin %s fails configuration", res.OrgId())

api/internal/target/kusttarget.go

@@ -34,7 +34,7 @@ type KustTarget struct {
 	ldr           ifc.Loader
 	validator     ifc.Validator
 	rFactory      *resmap.Factory
-	pLdr          *loader.Loader
+	pLdr          *loader.Loader // plugin loader
 	origin        *resource.Origin
 }
 
@@ -176,6 +176,15 @@ func (kt *KustTarget) addHashesToNames(
 	return ra.Transform(p)
 }
 
+// AccumulateResource fills the given resourceAccumulator with resources read from the given path from external package.
+func (kt *KustTarget) AccumulateResource(path string) (rm resmap.ResMap, err error) {
+	ra := accumulator.MakeEmptyAccumulator()
+	if err := kt.accumulateResource(ra, path); err != nil {
+		return nil, fmt.Errorf("failed to accumulateResource: %w", err)
+	}
+	return ra.ResMap(), nil
+}
+
 // AccumulateTarget returns a new ResAccumulator,
 // holding customized resources and the data/rules used
 // to do so.  The name back references and vars are
@@ -197,11 +206,6 @@ func (kt *KustTarget) AccumulateTarget() (
 // ra should be empty when this KustTarget is a Kustomization, or the ra of the parent if this KustTarget is a Component
 // (or empty if the Component does not have a parent).
 func (kt *KustTarget) accumulateTarget(ra *accumulator.ResAccumulator) (resRa *accumulator.ResAccumulator, err error) {
-	// read `resources`
-	ra, err = kt.accumulateResources(ra, kt.kustomization.Resources) // it needs to remove
-	if err != nil {
-		return nil, errors.WrapPrefixf(err, "accumulating resources")
-	}
 
 	tConfig, err := builtinconfig.MakeTransformerConfig(
 		kt.ldr, kt.kustomization.Configurations)
@@ -419,40 +423,51 @@ func (kt *KustTarget) removeValidatedByLabel(rm resmap.ResMap) error {
 func (kt *KustTarget) accumulateResources(
 	ra *accumulator.ResAccumulator, paths []string) (*accumulator.ResAccumulator, error) {
 	for _, path := range paths {
-		// try loading resource as file then as base (directory or git repository)
-		if errF := kt.accumulateFile(ra, path); errF != nil {
-			// not much we can do if the error is an HTTP error so we bail out
-			if errors.Is(errF, load.ErrHTTP) {
-				return nil, errF
-			}
-			ldr, err := kt.ldr.New(path)
-			if err != nil {
-				if kusterr.IsMalformedYAMLError(errF) { // Some error occurred while tyring to decode YAML file
-					return nil, errF
-				}
-				return nil, errors.WrapPrefixf(
-					err, "accumulation err='%s'", errF.Error())
-			}
-			// store the origin, we'll need it later
-			origin := kt.origin.Copy()
-			if kt.origin != nil {
-				kt.origin = kt.origin.Append(path)
-				ra, err = kt.accumulateDirectory(ra, ldr, false)
-				// after we are done recursing through the directory, reset the origin
-				kt.origin = &origin
-			} else {
-				ra, err = kt.accumulateDirectory(ra, ldr, false)
+		if err := kt.accumulateResource(ra, path); err != nil {
+			return nil, err
+		}
+	}
+	return ra, nil
+}
+
+// accumulateResource fills the given resourceAccumulator with resources read from the given path.
+func (kt *KustTarget) accumulateResource(ra *accumulator.ResAccumulator, path string) error {
+	// try loading resource as file then as base (directory or git repository)
+	if errF := kt.accumulateFile(ra, path); errF != nil {
+		// not much we can do if the error is an HTTP error so we bail out
+		if errors.Is(errF, load.ErrHTTP) {
+			return errF
+		}
+		ldr, err := kt.ldr.New(path)
+		if err != nil {
+			// Some error occurred while tyring to decode YAML file
+			if kusterr.IsMalformedYAMLError(errF) {
+
+				return errF
 			}
-			if err != nil {
-				if kusterr.IsMalformedYAMLError(errF) { // Some error occurred while tyring to decode YAML file
-					return nil, errF
-				}
-				return nil, errors.WrapPrefixf(
-					err, "accumulation err='%s'", errF.Error())
+			return errors.WrapPrefixf(
+				err, "accumulation err='%s'", errF.Error())
+		}
+		// store the origin, we'll need it later
+		origin := kt.origin.Copy()
+		if kt.origin != nil {
+			kt.origin = kt.origin.Append(path)
+			ra, err = kt.accumulateDirectory(ra, ldr, false)
+			// after we are done recursing through the directory, reset the origin
+			kt.origin = &origin
+		} else {
+			ra, err = kt.accumulateDirectory(ra, ldr, false)
+		}
+		if err != nil {
+			// Some error occurred while tyring to decode YAML file
+			if kusterr.IsMalformedYAMLError(errF) {
+				return errF
 			}
+			return errors.WrapPrefixf(
+				err, "accumulation err='%s'", errF.Error())
 		}
 	}
-	return ra, nil
+	return nil
 }
 
 // accumulateResources fills the given resourceAccumulator
@@ -570,7 +585,7 @@ func (kt *KustTarget) configureBuiltinPlugin(
 	}
 	err = p.Config(
 		resmap.NewPluginHelpers(
-			kt.ldr, kt.validator, kt.rFactory, kt.pLdr.Config()),
+			kt.ldr, kt.validator, kt.rFactory, kt.pLdr.Config(), kt),
 		y)
 	if err != nil {
 		return errors.WrapPrefixf(

api/internal/target/kusttarget_configplugin.go

@@ -109,18 +109,24 @@ func (kt *KustTarget) configureBuiltinTransformers(tc *builtinconfig.Transformer
 
 type gFactory func() resmap.GeneratorPlugin
 
+type ResourceArgs struct {
+	Resource string      `json:"resource,omitempty" yaml:"resource,omitempty"`
+	Kt       *KustTarget `json:"kusttarget,omitempty" yaml:"kusttarget,omitempty"`
+}
+
 var generatorConfigurators = map[builtinhelpers.BuiltinPluginType]func(
 	kt *KustTarget,
 	bpt builtinhelpers.BuiltinPluginType,
 	factory gFactory) (result []resmap.Generator, err error){
 	builtinhelpers.ResourceGenerator: func(kt *KustTarget, bpt builtinhelpers.BuiltinPluginType, f gFactory) (
 		result []resmap.Generator, err error) {
 		var c struct {
-			resource string
+			Resource string `json:"resource" yaml:"resource"`
 		}
 		for _, args := range kt.kustomization.Resources {
-			c.resource = args
+			c.Resource = args
 			p := f()
+
 			if err := kt.configureBuiltinPlugin(p, c, bpt); err != nil {
 				return nil, err
 			}

api/resmap/factory.go

@@ -143,3 +143,7 @@ func (rmF *Factory) NewResMapFromRNodeSlice(s []*yaml.RNode) (ResMap, error) {
 	}
 	return newResMapFromResourceSlice(rs)
 }
+
+// func (rmF *Factory) FromResourceEntry(loader ifc.Loader, resource string, ktInterface interface{}) (ResMap, error) {
+// 	return nil, nil
+// }

api/resmap/resmap.go

@@ -49,9 +49,9 @@ type Configurable interface {
 
 // NewPluginHelpers makes an instance of PluginHelpers.
 func NewPluginHelpers(
-	ldr ifc.Loader, v ifc.Validator, rf *Factory,
-	pc *types.PluginConfig) *PluginHelpers {
-	return &PluginHelpers{ldr: ldr, v: v, rf: rf, pc: pc}
+	ldr ifc.Loader, v ifc.Validator, rf *Factory, pc *types.PluginConfig, kt KustTargetInterface,
+) *PluginHelpers {
+	return &PluginHelpers{ldr: ldr, v: v, rf: rf, pc: pc, kt: kt}
 }
 
 // PluginHelpers holds things that any or all plugins might need.
@@ -62,6 +62,17 @@ type PluginHelpers struct {
 	v   ifc.Validator
 	rf  *Factory
 	pc  *types.PluginConfig
+	kt  KustTargetInterface
+}
+
+// KustTargetInterface is the interface for exec accumulate functions from external packages.
+type KustTargetInterface interface {
+	AccumulateResource(path string) (ResMap, error)
+}
+
+// AccumulateResources exec target.(*KustTarget).AccumulateResource()
+func (c *PluginHelpers) AccumulateResource(path string) (ResMap, error) {
+	return c.kt.AccumulateResource(path)
 }
 
 func (c *PluginHelpers) GeneralConfig() *types.PluginConfig {

cmd/pluginator/internal/krmfunction/funcwrappersrc/main.go

@@ -15,13 +15,13 @@ import (
 	"sigs.k8s.io/kustomize/kyaml/fn/framework"
 )
 
-//nolint
+// nolint
 func main() {
 	var plugin resmap.Configurable
 	p := provider.NewDefaultDepProvider()
 	resmapFactory := resmap.NewFactory(p.GetResourceFactory())
 	pluginHelpers := resmap.NewPluginHelpers(
-		nil, p.GetFieldValidator(), resmapFactory, types.DisabledPluginConfig())
+		nil, p.GetFieldValidator(), resmapFactory, types.DisabledPluginConfig(), nil) //TODO
 
 	processor := framework.ResourceListProcessorFunc(func(resourceList *framework.ResourceList) error {
 		resMap, err := resmapFactory.NewResMapFromRNodeSlice(resourceList.Items)

plugin/builtin/resourcegenerator/ResourceGenerator.go

@@ -5,23 +5,29 @@
 package main
 
 import (
+	"fmt"
+
 	"sigs.k8s.io/kustomize/api/resmap"
+	"sigs.k8s.io/kustomize/kyaml/yaml"
 )
 
 type plugin struct {
 	h        *resmap.PluginHelpers
-	resource string
+	Resource string `json:"resource" yaml:"resource"`
 }
 
-var KustomizePlugin plugin //nolint:gochecknoglobals
-
-func (p *plugin) Config(h *resmap.PluginHelpers, config []byte) (err error) {
+func (p *plugin) Config(h *resmap.PluginHelpers, config []byte) error {
 	p.h = h
-	return
+	if err := yaml.Unmarshal(config, p); err != nil {
+		return fmt.Errorf("failed to unmarshal ResourceGenerator config: %w", err)
+	}
+	return nil
 }
 
 func (p *plugin) Generate() (resmap.ResMap, error) {
-
-	resourceBytes := []byte(p.resource) //idiot
-	return p.h.ResmapFactory().NewResMapFromBytes(resourceBytes)
+	resmap, err := p.h.AccumulateResource(p.Resource)
+	if err != nil {
+		return nil, fmt.Errorf("failed to Accumulate: %w", err)
+	}
+	return resmap, nil
 }

plugin/builtin/resourcegenerator/ResourceGenerator_test.go

@@ -3,9 +3,35 @@
 
 package main_test
 
-import (
-	"testing"
-)
+// func TestResourceGenerator(t *testing.T) {
+// 	th := kusttest_test.MakeEnhancedHarness(t).
+// 		PrepBuiltin("ResourceGenerator")
+// 	defer th.Reset()
 
-func TestResourceGenerator(t *testing.T) {
-}
+// 	th.WriteF("config.yaml", `
+// apiVersion: v1
+// kind: ConfigMap
+// metadata:
+//   name: myMap
+// data:
+//   COLOR: red
+//   FRUIT: apple
+// `)
+// 	rm := th.LoadAndRunGenerator(`
+// apiVersion: builtin
+// kind: ResourceGenerator
+// metadata:
+//   name: myMap
+// resource: config.yaml
+// `)
+
+// 	th.AssertActualEqualsExpected(rm, `
+// apiVersion: v1
+// kind: ConfigMap
+// metadata:
+//   name: myMap
+// data:
+//   COLOR: red
+//   FRUIT: apple
+// `)
+// }