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78 lines
2.4 KiB
Go
78 lines
2.4 KiB
Go
/*
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Copyright 2019 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package get
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import (
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"fmt"
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"io"
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"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
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metav1beta1 "k8s.io/apimachinery/pkg/apis/meta/v1beta1"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/cli-runtime/pkg/printers"
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"k8s.io/klog"
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)
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// TablePrinter decodes table objects into typed objects before delegating to another printer.
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// Non-table types are simply passed through
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type TablePrinter struct {
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Delegate printers.ResourcePrinter
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}
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func (t *TablePrinter) PrintObj(obj runtime.Object, writer io.Writer) error {
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table, err := decodeIntoTable(obj)
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if err == nil {
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return t.Delegate.PrintObj(table, writer)
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}
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// if we are unable to decode server response into a v1beta1.Table,
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// fallback to client-side printing with whatever info the server returned.
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klog.V(2).Infof("Unable to decode server response into a Table. Falling back to hardcoded types: %v", err)
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return t.Delegate.PrintObj(obj, writer)
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}
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func decodeIntoTable(obj runtime.Object) (runtime.Object, error) {
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if obj.GetObjectKind().GroupVersionKind().Group != metav1beta1.GroupName {
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return nil, fmt.Errorf("attempt to decode non-Table object into a v1beta1.Table")
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}
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if obj.GetObjectKind().GroupVersionKind().Kind != "Table" {
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return nil, fmt.Errorf("attempt to decode non-Table object into a v1beta1.Table")
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}
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unstr, ok := obj.(*unstructured.Unstructured)
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if !ok {
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return nil, fmt.Errorf("attempt to decode non-Unstructured object")
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}
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table := &metav1beta1.Table{}
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if err := runtime.DefaultUnstructuredConverter.FromUnstructured(unstr.Object, table); err != nil {
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return nil, err
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}
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for i := range table.Rows {
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row := &table.Rows[i]
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if row.Object.Raw == nil || row.Object.Object != nil {
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continue
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}
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converted, err := runtime.Decode(unstructured.UnstructuredJSONScheme, row.Object.Raw)
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if err != nil {
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return nil, err
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}
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row.Object.Object = converted
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}
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return table, nil
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}
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