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labels.go
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labels.go
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package clisupport
import (
"encoding/json"
"strings"
"github.com/mandelsoft/goutils/errors"
"github.com/mandelsoft/vfs/pkg/osfs"
"github.com/mandelsoft/vfs/pkg/vfs"
"sigs.k8s.io/yaml"
metav1 "github.com/open-component-model/ocm/pkg/contexts/ocm/compdesc/meta/v1"
"github.com/open-component-model/ocm/pkg/utils"
)
func gkind(kind ...string) string {
for _, k := range kind {
if k != "" {
return k
}
}
return "label"
}
func ParseLabel(fs vfs.FileSystem, a string, kind ...string) (*metav1.Label, error) {
var err error
if fs == nil {
fs = osfs.New()
}
i := strings.Index(a, "=")
if i < 0 {
return nil, errors.ErrInvalid(gkind(kind...), a)
}
label := a[:i]
data, err := utils.ResolveData(a[i+1:], fs)
if err != nil {
return nil, err
}
var value interface{}
err = yaml.Unmarshal(data, &value)
if err != nil {
return nil, errors.Wrapf(errors.ErrInvalid(gkind(kind...), a), "no yaml or json")
}
data, err = json.Marshal(value)
if err != nil {
return nil, errors.Wrapf(errors.ErrInvalid(gkind(kind...), a), err.Error())
}
return &metav1.Label{
Name: strings.TrimSpace(label),
Value: json.RawMessage(data),
}, nil
}
func AddParsedLabel(fs vfs.FileSystem, labels metav1.Labels, a string, kind ...string) (metav1.Labels, error) {
l, err := ParseLabel(fs, a, kind...)
if err != nil {
return nil, err
}
for _, c := range labels {
if c.Name == l.Name {
return nil, errors.Newf("duplicate %s %q", gkind(kind...), l.Name)
}
}
return append(labels, *l), nil
}
func ParseLabels(fs vfs.FileSystem, labels []string, kind ...string) (metav1.Labels, error) {
var err error
result := metav1.Labels{}
for _, l := range labels {
result, err = AddParsedLabel(fs, result, l, kind...)
if err != nil {
return nil, err
}
}
return result, err
}
func SetParsedLabel(fs vfs.FileSystem, labels metav1.Labels, a string, kind ...string) (metav1.Labels, error) {
l, err := ParseLabel(fs, a, kind...)
if err != nil {
return nil, err
}
for i, c := range labels {
if c.Name == l.Name {
labels[i].Value = l.Value
return labels, nil
}
}
return append(labels, *l), nil
}