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Fix kubectl -template to be versioned

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This commit is contained in:
Daniel Smith 2014-11-07 14:41:59 -08:00
parent 66d62229f6
commit 9bb0d33a3f
2 changed files with 51 additions and 23 deletions
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49
pkg/kubectl/resource_printer.go
View File

@ -28,6 +28,7 @@ import (
"text/template"
"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
"github.com/GoogleCloudPlatform/kubernetes/pkg/api/latest"
"github.com/GoogleCloudPlatform/kubernetes/pkg/labels"
"github.com/GoogleCloudPlatform/kubernetes/pkg/runtime"
"github.com/golang/glog"
@ -45,35 +46,26 @@ func GetPrinter(format, templateFile string, defaultPrinter ResourcePrinter) (Re
case "yaml":
printer = &YAMLPrinter{}
case "template":
var data []byte
if len(templateFile) == 0 {
return nil, false, fmt.Errorf("template format specified but no template given")
}
tmpl, err := template.New("output").Parse(templateFile)
var err error
printer, err = NewTemplatePrinter([]byte(templateFile))
if err != nil {
return nil, false, fmt.Errorf("error parsing template %s, %v\n", string(data), err)
}
printer = &TemplatePrinter{
Template: tmpl,
return nil, false, fmt.Errorf("error parsing template %s, %v\n", templateFile, err)
}
case "templatefile":
var data []byte
if len(templateFile) > 0 {
var err error
data, err = ioutil.ReadFile(templateFile)
if err != nil {
return nil, false, fmt.Errorf("error reading template %s, %v\n", templateFile, err)
}
} else {
if len(templateFile) == 0 {
return nil, false, fmt.Errorf("templatefile format specified but no template file given")
}
tmpl, err := template.New("output").Parse(string(data))
data, err := ioutil.ReadFile(templateFile)
if err != nil {
return nil, false, fmt.Errorf("error reading template %s, %v\n", templateFile, err)
}
printer, err = NewTemplatePrinter(data)
if err != nil {
return nil, false, fmt.Errorf("error parsing template %s, %v\n", string(data), err)
}
printer = &TemplatePrinter{
Template: tmpl,
}
case "":
printer = defaultPrinter
versioned = false
@ -323,12 +315,29 @@ func (h *HumanReadablePrinter) PrintObj(obj runtime.Object, output io.Writer) er
// TemplatePrinter is an implementation of ResourcePrinter which formats data with a Go Template.
type TemplatePrinter struct {
Template *template.Template
template *template.Template
}
func NewTemplatePrinter(tmpl []byte) (*TemplatePrinter, error) {
t, err := template.New("output").Parse(string(tmpl))
if err != nil {
return nil, err
}
return &TemplatePrinter{t}, nil
}
// PrintObj formats the obj with the Go Template.
func (t *TemplatePrinter) PrintObj(obj runtime.Object, w io.Writer) error {
return t.Template.Execute(w, obj)
data, err := latest.Codec.Encode(obj)
if err != nil {
return err
}
outObj := map[string]interface{}{}
err = json.Unmarshal(data, &outObj)
if err != nil {
return err
}
return t.template.Execute(w, outObj)
}
func tabbedString(f func(*tabwriter.Writer) error) (string, error) {

25
pkg/kubectl/resource_printer_test.go
View File

@ -86,14 +86,17 @@ func TestPrintYAML(t *testing.T) {
func TestPrintTemplate(t *testing.T) {
buf := bytes.NewBuffer([]byte{})
printer, versioned, err := GetPrinter("template", "{{ .Name }}", nil)
printer, versioned, err := GetPrinter("template", "{{.id}}", nil)
if err != nil {
t.Errorf("unexpected error: %#v", err)
t.Fatalf("unexpected error: %#v", err)
}
if !versioned {
t.Errorf("printer should be versioned")
}
printer.PrintObj(&api.Pod{ObjectMeta: api.ObjectMeta{Name: "foo"}}, buf)
err = printer.PrintObj(&api.Pod{ObjectMeta: api.ObjectMeta{Name: "foo"}}, buf)
if err != nil {
t.Fatalf("unexpected error: %#v", err)
}
if buf.String() != "foo" {
t.Errorf("unexpected output: %s", buf.String())
}
@ -204,3 +207,19 @@ func TestUnknownTypePrinting(t *testing.T) {
t.Errorf("An error was expected from printing unknown type")
}
}
func TestTemplateEmitsVersionedObjects(t *testing.T) {
// kind is always blank in memory and set on the wire
printer, err := NewTemplatePrinter([]byte(`{{.kind}}`))
if err != nil {
t.Fatalf("tmpl fail: %v", err)
}
buffer := &bytes.Buffer{}
err = printer.PrintObj(&api.Pod{}, buffer)
if err != nil {
t.Fatalf("print fail: %v", err)
}
if e, a := "Pod", string(buffer.Bytes()); e != a {
t.Errorf("Expected %v, got %v", e, a)
}
}