forked from ksonnet/ksonnet
/
printer.go
66 lines (58 loc) · 1.64 KB
/
printer.go
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// Copyright 2018 The ksonnet authors
//
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package pipeline
import (
"encoding/json"
"fmt"
"io"
yaml "gopkg.in/yaml.v2"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
)
// Fprint prints objects to a writer in a format (yaml or json).
func Fprint(out io.Writer, objects []*unstructured.Unstructured, format string) error {
switch format {
case "yaml":
return printYAML(out, objects)
case "json":
return printJSON(out, objects)
default:
return fmt.Errorf("unknown format: %s", format)
}
}
func printYAML(out io.Writer, objects []*unstructured.Unstructured) error {
for _, obj := range objects {
fmt.Fprintln(out, "---")
buf, err := yaml.Marshal(obj.Object)
if err != nil {
return err
}
out.Write(buf)
}
return nil
}
func printJSON(out io.Writer, objects []*unstructured.Unstructured) error {
enc := json.NewEncoder(out)
enc.SetIndent("", " ")
for _, obj := range objects {
// TODO: this is not valid framing for JSON
if len(objects) > 1 {
fmt.Fprintln(out, "---")
}
if err := enc.Encode(obj); err != nil {
return err
}
}
return nil
}