running kubectl apply in higher level

go.mod

@@ -10,6 +10,7 @@ require (
 	github.com/golang/glog v1.0.0
 	github.com/google/go-cmp v0.5.6
 	github.com/prometheus/client_golang v1.11.0
+	github.com/spf13/cobra v1.2.1
 	golang.org/x/crypto v0.0.0-20210817164053-32db794688a5
 	golang.org/x/tools v0.1.6-0.20210820212750-d4cc65f0b2ff
 	k8s.io/api v0.23.0
@@ -80,7 +81,6 @@ require (
 	github.com/prometheus/procfs v0.6.0 // indirect
 	github.com/russross/blackfriday v1.5.2 // indirect
 	github.com/sergi/go-diff v1.1.0 // indirect
-	github.com/spf13/cobra v1.2.1 // indirect
 	github.com/spf13/pflag v1.0.5 // indirect
 	github.com/stretchr/testify v1.7.0 // indirect
 	github.com/xanzy/ssh-agent v0.2.1 // indirect

pkg/patterns/declarative/pkg/applier/direct.go

@@ -1,20 +1,22 @@
 package applier
 
 import (
+	"bytes"
 	"context"
 	"fmt"
-	"os"
 	"strings"
 
+	"github.com/spf13/cobra"
 	"k8s.io/apimachinery/pkg/api/meta"
 	"k8s.io/cli-runtime/pkg/genericclioptions"
-	"k8s.io/cli-runtime/pkg/printers"
 	"k8s.io/cli-runtime/pkg/resource"
 	"k8s.io/client-go/discovery"
 	"k8s.io/client-go/rest"
+	"k8s.io/client-go/tools/clientcmd"
+	"k8s.io/client-go/tools/clientcmd/api"
 	"k8s.io/kubectl/pkg/cmd/apply"
-	cmdDelete "k8s.io/kubectl/pkg/cmd/delete"
 	cmdutil "k8s.io/kubectl/pkg/cmd/util"
+	"sigs.k8s.io/controller-runtime/pkg/log"
 )
 
 type DirectApplier struct {
@@ -27,78 +29,57 @@ func NewDirectApplier() *DirectApplier {
 }
 
 func (d *DirectApplier) Apply(ctx context.Context, opt ApplierOptions) error {
+	log := log.Log
+	ioReader := strings.NewReader(opt.Manifest)
+
+	buffer := &bytes.Buffer{}
+
 	ioStreams := genericclioptions.IOStreams{
-		In:     os.Stdin,
-		Out:    os.Stdout,
-		ErrOut: os.Stderr,
+		In:     bytes.NewReader(nil),
+		Out:    buffer,
+		ErrOut: buffer,
 	}
-	ioReader := strings.NewReader(opt.Manifest)
 
 	restClientGetter := &staticRESTClientGetter{
 		RESTMapper: opt.RESTMapper,
 		RESTConfig: opt.RESTConfig,
 	}
-	b := resource.NewBuilder(restClientGetter)
-
-	if opt.Validate {
-		// This potentially causes redundant work, but validation isn't the common path
-		v, err := cmdutil.NewFactory(&genericclioptions.ConfigFlags{}).Validator(true)
-		if err != nil {
-			return err
-		}
-		b.Schema(v)
-	}
 
-	res := b.Unstructured().Stream(ioReader, "manifestString").Do()
-	infos, err := res.Infos()
-	if err != nil {
-		return err
+	args := append(opt.ExtraArgs, "-f", "-")
+	if !opt.Validate {
+		args = append(args, "--validate=false")
 	}
 
-	// Populate the namespace on any namespace-scoped objects
-	if opt.Namespace != "" {
-		visitor := resource.SetNamespace(opt.Namespace)
-		for _, info := range infos {
-			if err := info.Visit(visitor); err != nil {
-				return fmt.Errorf("error from SetNamespace: %w", err)
-			}
-		}
-	}
+	log.V(4).Info("applying manifests", "args", args, "manifests", opt.Manifest)
 
-	applyOpts := apply.NewApplyOptions(ioStreams)
-
-	for i, arg := range opt.ExtraArgs {
-		switch arg {
-		case "--force":
-			applyOpts.ForceConflicts = true
-		case "--prune":
-			applyOpts.Prune = true
-		case "--selector":
-			applyOpts.Selector = opt.ExtraArgs[i+1]
-		default:
-			continue
-		}
+	cmd, o := NewCmdApply(ioStreams)
+	if err := cmd.ParseFlags(args); err != nil {
+		return fmt.Errorf("parse kubectl apply args failed, args: %v, errors: %w", args, err)
 	}
-
-	applyOpts.Namespace = opt.Namespace
-	applyOpts.SetObjects(infos)
-	applyOpts.ToPrinter = func(operation string) (printers.ResourcePrinter, error) {
-		applyOpts.PrintFlags.NamePrintFlags.Operation = operation
-		cmdutil.PrintFlagsWithDryRunStrategy(applyOpts.PrintFlags, applyOpts.DryRunStrategy)
-		return applyOpts.PrintFlags.ToPrinter()
+	if err := o.Complete(cmdutil.NewFactory(restClientGetter), cmd); err != nil {
+		return fmt.Errorf("apply manifests failed, args: %v, errors: %s, msg:%w", args, err)
+	}
+	res := o.Builder.Unstructured().Stream(ioReader, "manifestString").Do()
+	if infos, err := res.Infos(); err != nil {
+		return err
+	} else {
+		o.SetObjects(infos)
 	}
-	applyOpts.DeleteOptions = &cmdDelete.DeleteOptions{
-		IOStreams: ioStreams,
+
+	if err := o.Run(); err != nil {
+		return fmt.Errorf("apply manifests failed, args: %v, errors: %s, msg:%s", args, err, buffer.String())
 	}
 
-	return applyOpts.Run()
+	log.Info("applying manifest succeed", "message", buffer.String())
+	return nil
 }
 
 // staticRESTClientGetter returns a fixed RESTClient
 type staticRESTClientGetter struct {
 	RESTConfig      *rest.Config
 	DiscoveryClient discovery.CachedDiscoveryInterface
 	RESTMapper      meta.RESTMapper
+	namespace       string
 }
 
 var _ resource.RESTClientGetter = &staticRESTClientGetter{}
@@ -121,3 +102,52 @@ func (s *staticRESTClientGetter) ToRESTMapper() (meta.RESTMapper, error) {
 	}
 	return s.RESTMapper, nil
 }
+func (s *staticRESTClientGetter) ToRawKubeConfigLoader() clientcmd.ClientConfig {
+	return namespaceStub(s.namespace)
+}
+
+type namespaceStub string
+
+func (n namespaceStub) Namespace() (string, bool, error) {
+	return string(n), false, nil
+}
+
+// below methods should never be called
+func (namespaceStub) RawConfig() (api.Config, error) {
+	panic("implement me")
+}
+
+func (namespaceStub) ClientConfig() (*rest.Config, error) {
+	panic("implement me")
+}
+
+func (namespaceStub) ConfigAccess() clientcmd.ConfigAccess {
+	panic("implement me")
+}
+
+func NewCmdApply(ioStreams genericclioptions.IOStreams) (*cobra.Command, *apply.ApplyOptions) {
+	o := apply.NewApplyOptions(ioStreams)
+
+	// Store baseName for use in printing warnings / messages involving the base command name.
+	// This is useful for downstream command that wrap this one.
+
+	cmd := &cobra.Command{}
+
+	// bind flag structs
+	o.DeleteFlags.AddFlags(cmd)
+	o.RecordFlags.AddFlags(cmd)
+	o.PrintFlags.AddFlags(cmd)
+
+	cmd.Flags().BoolVar(&o.Overwrite, "overwrite", o.Overwrite, "Automatically resolve conflicts between the modified and live configuration by using values from the modified configuration")
+	cmd.Flags().BoolVar(&o.Prune, "prune", o.Prune, "Automatically delete resource objects, including the uninitialized ones, that do not appear in the configs and are created by either apply or create --save-config. Should be used with either -l or --all.")
+	cmdutil.AddValidateFlags(cmd)
+	cmd.Flags().StringVarP(&o.Selector, "selector", "l", o.Selector, "Selector (label query) to filter on, supports '=', '==', and '!='.(e.g. -l key1=value1,key2=value2)")
+	cmd.Flags().BoolVar(&o.All, "all", o.All, "Select all resources in the namespace of the specified resource types.")
+	cmd.Flags().StringArrayVar(&o.PruneWhitelist, "prune-whitelist", o.PruneWhitelist, "Overwrite the default whitelist with <group/version/kind> for --prune")
+	cmd.Flags().BoolVar(&o.OpenAPIPatch, "openapi-patch", o.OpenAPIPatch, "If true, use openapi to calculate diff when the openapi presents and the resource can be found in the openapi spec. Otherwise, fall back to use baked-in types.")
+	cmdutil.AddDryRunFlag(cmd)
+	cmdutil.AddServerSideApplyFlags(cmd)
+	cmdutil.AddFieldManagerFlagVar(cmd, &o.FieldManager, apply.FieldManagerClientSideApply)
+
+	return cmd, o
+}