Golang strategicpatch.CreateThreeWayMergePatch函数代码示例

func (p *patcher) patchSimple(obj runtime.Object, modified []byte, source, namespace, name string) ([]byte, error) {
	// Serialize the current configuration of the object from the server.
	current, err := runtime.Encode(p.encoder, obj)
	if err != nil {
		return nil, cmdutil.AddSourceToErr(fmt.Sprintf("serializing current configuration from:\n%v\nfor:", obj), source, err)
	}

	// Retrieve the original configuration of the object from the annotation.
	original, err := kubectl.GetOriginalConfiguration(p.mapping, obj)
	if err != nil {
		return nil, cmdutil.AddSourceToErr(fmt.Sprintf("retrieving original configuration from:\n%v\nfor:", obj), source, err)
	}

	// Create the versioned struct from the original from the server for
	// strategic patch.
	// TODO: Move all structs in apply to use raw data. Can be done once
	// builder has a RawResult method which delivers raw data instead of
	// internal objects.
	versionedObject, _, err := p.decoder.Decode(current, nil, nil)
	if err != nil {
		return nil, cmdutil.AddSourceToErr(fmt.Sprintf("converting encoded server-side object back to versioned struct:\n%v\nfor:", obj), source, err)
	}

	// Compute a three way strategic merge patch to send to server.
	patch, err := strategicpatch.CreateThreeWayMergePatch(original, modified, current, versionedObject, p.overwrite)
	if err != nil {
		format := "creating patch with:\noriginal:\n%s\nmodified:\n%s\ncurrent:\n%s\nfor:"
		return nil, cmdutil.AddSourceToErr(fmt.Sprintf(format, original, modified, current), source, err)
	}

	_, err = p.helper.Patch(namespace, name, api.StrategicMergePatchType, patch)
	return patch, err
}

func (p *patcher) patchSimple(obj runtime.Object, modified []byte, source, namespace, name string) ([]byte, error) {
	// Serialize the current configuration of the object from the server.
	current, err := runtime.Encode(p.encoder, obj)
	if err != nil {
		return nil, cmdutil.AddSourceToErr(fmt.Sprintf("serializing current configuration from:\n%v\nfor:", obj), source, err)
	}

	// Retrieve the original configuration of the object from the annotation.
	original, err := kubectl.GetOriginalConfiguration(p.mapping, obj)
	if err != nil {
		return nil, cmdutil.AddSourceToErr(fmt.Sprintf("retrieving original configuration from:\n%v\nfor:", obj), source, err)
	}

	// Create the versioned struct from the type defined in the restmapping
	// (which is the API version we'll be submitting the patch to)
	versionedObject, err := api.Scheme.New(p.mapping.GroupVersionKind)
	if err != nil {
		return nil, cmdutil.AddSourceToErr(fmt.Sprintf("getting instance of versioned object for %v:", p.mapping.GroupVersionKind), source, err)
	}

	// Compute a three way strategic merge patch to send to server.
	patch, err := strategicpatch.CreateThreeWayMergePatch(original, modified, current, versionedObject, p.overwrite)
	if err != nil {
		format := "creating patch with:\noriginal:\n%s\nmodified:\n%s\ncurrent:\n%s\nfor:"
		return nil, cmdutil.AddSourceToErr(fmt.Sprintf(format, original, modified, current), source, err)
	}

	_, err = p.helper.Patch(namespace, name, api.StrategicMergePatchType, patch)
	return patch, err
}

func RunApply(f *cmdutil.Factory, cmd *cobra.Command, out io.Writer, options *ApplyOptions) error {
	shortOutput := cmdutil.GetFlagString(cmd, "output") == "name"
	schema, err := f.Validator(cmdutil.GetFlagBool(cmd, "validate"), cmdutil.GetFlagString(cmd, "schema-cache-dir"))
	if err != nil {
		return err
	}

	cmdNamespace, _, err := f.DefaultNamespace()
	if err != nil {
		return err
	}

	mapper, typer := f.Object()
	r := resource.NewBuilder(mapper, typer, f.ClientMapperForCommand()).
		Schema(schema).
		ContinueOnError().
		NamespaceParam(cmdNamespace).DefaultNamespace().
		FilenameParam(false, options.Filenames...).
		Flatten().
		Do()
	err = r.Err()
	if err != nil {
		return err
	}

	count := 0
	err = r.Visit(func(info *resource.Info, err error) error {
		// In this method, info.Object contains the object retrieved from the server
		// and info.VersionedObject contains the object decoded from the input source.
		if err != nil {
			return err
		}

		// Get the modified configuration of the object. Embed the result
		// as an annotation in the modified configuration, so that it will appear
		// in the patch sent to the server.
		modified, err := kubectl.GetModifiedConfiguration(info, true)
		if err != nil {
			return cmdutil.AddSourceToErr(fmt.Sprintf("retrieving modified configuration from:\n%v\nfor:", info), info.Source, err)
		}

		if err := info.Get(); err != nil {
			if !errors.IsNotFound(err) {
				return cmdutil.AddSourceToErr(fmt.Sprintf("retrieving current configuration of:\n%v\nfrom server for:", info), info.Source, err)
			}
			// Create the resource if it doesn't exist
			// First, update the annotation used by kubectl apply
			if err := kubectl.CreateApplyAnnotation(info); err != nil {
				return cmdutil.AddSourceToErr("creating", info.Source, err)
			}
			// Then create the resource and skip the three-way merge
			if err := createAndRefresh(info); err != nil {
				return cmdutil.AddSourceToErr("creating", info.Source, err)
			}
			count++
			cmdutil.PrintSuccess(mapper, shortOutput, out, info.Mapping.Resource, info.Name, "created")
			return nil
		}

		// Serialize the current configuration of the object from the server.
		current, err := info.Mapping.Codec.Encode(info.Object)
		if err != nil {
			return cmdutil.AddSourceToErr(fmt.Sprintf("serializing current configuration from:\n%v\nfor:", info), info.Source, err)
		}

		// Retrieve the original configuration of the object from the annotation.
		original, err := kubectl.GetOriginalConfiguration(info)
		if err != nil {
			return cmdutil.AddSourceToErr(fmt.Sprintf("retrieving original configuration from:\n%v\nfor:", info), info.Source, err)
		}

		// Compute a three way strategic merge patch to send to server.
		patch, err := strategicpatch.CreateThreeWayMergePatch(original, modified, current, info.VersionedObject, true)
		if err != nil {
			format := "creating patch with:\noriginal:\n%s\nmodified:\n%s\ncurrent:\n%s\nfrom:\n%v\nfor:"
			return cmdutil.AddSourceToErr(fmt.Sprintf(format, original, modified, current, info), info.Source, err)
		}

		helper := resource.NewHelper(info.Client, info.Mapping)
		_, err = helper.Patch(info.Namespace, info.Name, api.StrategicMergePatchType, patch)
		if err != nil {
			return cmdutil.AddSourceToErr(fmt.Sprintf("applying patch:\n%s\nto:\n%v\nfor:", patch, info), info.Source, err)
		}

		count++
		cmdutil.PrintSuccess(mapper, shortOutput, out, info.Mapping.Resource, info.Name, "configured")
		return nil
	})

	if err != nil {
		return err
	}

	if count == 0 {
		return fmt.Errorf("no objects passed to apply")
	}

	return nil
}

// ApplyResource applies the given data as a kubernetes resource
func ApplyResource(f *cmdutil.Factory, c *client.Client, ns string, data []byte, name string) error {
	schemaCacheDir := "/tmp/kubectl.schema"
	validate := true
	schema, err := f.Validator(validate, schemaCacheDir)
	if err != nil {
		log.Info("Failed to load kubernetes schema: %s", err)
		return err
	}

	mapper, typer := f.Object()
	r := resource.NewBuilder(mapper, typer, resource.ClientMapperFunc(f.ClientForMapping), f.Decoder(true)).
		Schema(schema).
		ContinueOnError().
		NamespaceParam(ns).DefaultNamespace().
		Stream(bytes.NewReader(data), name).
		Flatten().
		Do()
	err = r.Err()
	if err != nil {
		log.Info("Failed to load mapper!")
		return err
	}

	count := 0
	err = r.Visit(func(info *resource.Info, err error) error {
		// In this method, info.Object contains the object retrieved from the server
		// and info.VersionedObject contains the object decoded from the input source.
		if err != nil {
			return err
		}

		// Get the modified configuration of the object. Embed the result
		// as an annotation in the modified configuration, so that it will appear
		// in the patch sent to the server.
		modified, err := kubectl.GetModifiedConfiguration(info, true, f.JSONEncoder())
		if err != nil {
			return cmdutil.AddSourceToErr(fmt.Sprintf("retrieving modified configuration from:\n%v\nfor:", info), info.Source, err)
		}

		if err := info.Get(); err != nil {
			return cmdutil.AddSourceToErr(fmt.Sprintf("retrieving current configuration of:\n%v\nfrom server for:", info), info.Source, err)
		}

		// Serialize the current configuration of the object from the server.
		current, err := runtime.Encode(f.JSONEncoder(), info.Object)
		if err != nil {
			return cmdutil.AddSourceToErr(fmt.Sprintf("serializing current configuration from:\n%v\nfor:", info), info.Source, err)
		}

		// Retrieve the original configuration of the object from the annotation.
		original, err := kubectl.GetOriginalConfiguration(info)
		if err != nil {
			return cmdutil.AddSourceToErr(fmt.Sprintf("retrieving original configuration from:\n%v\nfor:", info), info.Source, err)
		}

		// Compute a three way strategic merge patch to send to server.
		patch, err := strategicpatch.CreateThreeWayMergePatch(original, modified, current, info.VersionedObject, false)
		if err != nil {
			format := "creating patch with:\noriginal:\n%s\nmodified:\n%s\ncurrent:\n%s\nfrom:\n%v\nfor:"
			return cmdutil.AddSourceToErr(fmt.Sprintf(format, original, modified, current, info), info.Source, err)
		}

		helper := resource.NewHelper(info.Client, info.Mapping)
		_, err = helper.Patch(info.Namespace, info.Name, api.StrategicMergePatchType, patch)
		if err != nil {
			return cmdutil.AddSourceToErr(fmt.Sprintf("applying patch:\n%s\nto:\n%v\nfor:", patch, info), info.Source, err)
		}

		count++
		cmdutil.PrintSuccess(mapper, false, os.Stdout, info.Mapping.Resource, info.Name, "configured")
		return nil
	})

	if err != nil {
		return err
	}

	if count == 0 {
		return fmt.Errorf("no objects passed to apply")
	}
	return nil
}