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alias.go
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alias.go
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package dao
import (
"context"
"errors"
"fmt"
"sort"
"strings"
"github.com/derailed/k9s/internal"
"github.com/derailed/k9s/internal/client"
"github.com/derailed/k9s/internal/config"
"github.com/derailed/k9s/internal/render"
"k8s.io/apimachinery/pkg/runtime"
)
var _ Accessor = (*Alias)(nil)
// Alias tracks standard and custom command aliases.
type Alias struct {
NonResource
*config.Aliases
}
// NewAlias returns a new set of aliases.
func NewAlias(f Factory) *Alias {
a := Alias{Aliases: config.NewAliases()}
a.Init(f, client.NewGVR("aliases"))
return &a
}
// Check verifies an alias is defined for this command.
func (a *Alias) Check(cmd string) bool {
_, ok := a.Aliases.Get(cmd)
return ok
}
// List returns a collection of aliases.
func (a *Alias) List(ctx context.Context, _ string) ([]runtime.Object, error) {
aa, ok := ctx.Value(internal.KeyAliases).(*Alias)
if !ok {
return nil, fmt.Errorf("expecting *Alias but got %T", ctx.Value(internal.KeyAliases))
}
m := aa.ShortNames()
oo := make([]runtime.Object, 0, len(m))
for gvr, aliases := range m {
sort.StringSlice(aliases).Sort()
oo = append(oo, render.AliasRes{GVR: gvr, Aliases: aliases})
}
return oo, nil
}
// AsGVR returns a matching gvr if it exists.
func (a *Alias) AsGVR(cmd string) (client.GVR, bool) {
gvr, ok := a.Aliases.Get(cmd)
if ok {
return client.NewGVR(gvr), true
}
return client.GVR{}, false
}
// Get fetch a resource.
func (a *Alias) Get(_ context.Context, _ string) (runtime.Object, error) {
return nil, errors.New("NYI!!")
}
// Ensure makes sure alias are loaded.
func (a *Alias) Ensure() (config.Alias, error) {
if err := MetaAccess.LoadResources(a.Factory); err != nil {
return config.Alias{}, err
}
return a.Alias, a.load()
}
func (a *Alias) load() error {
if err := a.Load(); err != nil {
return err
}
crdGVRS := make(client.GVRs, 0, 50)
for _, gvr := range MetaAccess.AllGVRs() {
meta, err := MetaAccess.MetaFor(gvr)
if err != nil {
return err
}
if IsK9sMeta(meta) {
continue
}
gvrStr := gvr.String()
if IsCRD(meta) {
crdGVRS = append(crdGVRS, gvr)
continue
}
a.Define(gvrStr, strings.ToLower(meta.Kind), meta.Name)
if meta.SingularName != "" {
a.Define(gvrStr, meta.SingularName)
}
if meta.ShortNames != nil {
a.Define(gvrStr, meta.ShortNames...)
}
a.Define(gvrStr, gvrStr)
}
for _, gvr := range crdGVRS {
meta, err := MetaAccess.MetaFor(gvr)
if err != nil {
return err
}
gvrStr := gvr.String()
a.Define(gvrStr, strings.ToLower(meta.Kind), meta.Name)
if meta.SingularName != "" {
a.Define(gvrStr, meta.SingularName)
}
if meta.ShortNames != nil {
a.Define(gvrStr, meta.ShortNames...)
}
a.Define(gvrStr, gvrStr)
}
return nil
}