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who_can.go
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who_can.go
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package policy
import (
"errors"
"fmt"
"io"
"strings"
"github.com/spf13/cobra"
kapi "k8s.io/kubernetes/pkg/api"
"k8s.io/kubernetes/pkg/api/meta"
"k8s.io/kubernetes/pkg/api/unversioned"
kcmdutil "k8s.io/kubernetes/pkg/kubectl/cmd/util"
authorizationapi "github.com/openshift/origin/pkg/authorization/api"
"github.com/openshift/origin/pkg/client"
"github.com/openshift/origin/pkg/cmd/util/clientcmd"
)
const WhoCanRecommendedName = "who-can"
type whoCanOptions struct {
allNamespaces bool
bindingNamespace string
client *client.Client
verb string
resource unversioned.GroupVersionResource
resourceName string
}
// NewCmdWhoCan implements the OpenShift cli who-can command
func NewCmdWhoCan(name, fullName string, f *clientcmd.Factory, out io.Writer) *cobra.Command {
options := &whoCanOptions{}
cmd := &cobra.Command{
Use: name + " VERB RESOURCE [NAME]",
Short: "List who can perform the specified action on a resource",
Long: "List who can perform the specified action on a resource",
Run: func(cmd *cobra.Command, args []string) {
if err := options.complete(f, args); err != nil {
kcmdutil.CheckErr(kcmdutil.UsageError(cmd, err.Error()))
}
var err error
options.client, _, err = f.Clients()
kcmdutil.CheckErr(err)
options.bindingNamespace, _, err = f.DefaultNamespace()
kcmdutil.CheckErr(err)
err = options.run()
kcmdutil.CheckErr(err)
},
}
cmd.Flags().BoolVar(&options.allNamespaces, "all-namespaces", options.allNamespaces, "If present, list who can perform the specified action in all namespaces.")
return cmd
}
func (o *whoCanOptions) complete(f *clientcmd.Factory, args []string) error {
switch len(args) {
case 3:
o.resourceName = args[2]
fallthrough
case 2:
restMapper, _ := f.Object(false)
o.verb = args[0]
o.resource = resourceFor(restMapper, args[1])
default:
return errors.New("you must specify two or three arguments: verb, resource, and optional resourceName")
}
return nil
}
func resourceFor(mapper meta.RESTMapper, resourceArg string) unversioned.GroupVersionResource {
fullySpecifiedGVR, groupResource := unversioned.ParseResourceArg(strings.ToLower(resourceArg))
gvr := unversioned.GroupVersionResource{}
if fullySpecifiedGVR != nil {
gvr, _ = mapper.ResourceFor(*fullySpecifiedGVR)
}
if gvr.IsEmpty() {
var err error
gvr, err = mapper.ResourceFor(groupResource.WithVersion(""))
if err != nil {
return unversioned.GroupVersionResource{Resource: resourceArg}
}
}
return gvr
}
func (o *whoCanOptions) run() error {
authorizationAttributes := authorizationapi.AuthorizationAttributes{
Verb: o.verb,
Group: o.resource.Group,
Resource: o.resource.Resource,
ResourceName: o.resourceName,
}
resourceAccessReviewResponse := &authorizationapi.ResourceAccessReviewResponse{}
var err error
if o.allNamespaces {
resourceAccessReviewResponse, err = o.client.ResourceAccessReviews().Create(&authorizationapi.ResourceAccessReview{Action: authorizationAttributes})
} else {
resourceAccessReviewResponse, err = o.client.LocalResourceAccessReviews(o.bindingNamespace).Create(&authorizationapi.LocalResourceAccessReview{Action: authorizationAttributes})
}
if err != nil {
return err
}
if resourceAccessReviewResponse.Namespace == kapi.NamespaceAll {
fmt.Printf("Namespace: <all>\n")
} else {
fmt.Printf("Namespace: %s\n", resourceAccessReviewResponse.Namespace)
}
resourceDisplay := o.resource.Resource
if len(o.resource.Group) > 0 {
resourceDisplay = resourceDisplay + "." + o.resource.Group
}
fmt.Printf("Verb: %s\n", o.verb)
fmt.Printf("Resource: %s\n\n", resourceDisplay)
if len(resourceAccessReviewResponse.Users) == 0 {
fmt.Printf("Users: none\n\n")
} else {
fmt.Printf("Users: %s\n\n", strings.Join(resourceAccessReviewResponse.Users.List(), "\n "))
}
if len(resourceAccessReviewResponse.Groups) == 0 {
fmt.Printf("Groups: none\n\n")
} else {
fmt.Printf("Groups: %s\n\n", strings.Join(resourceAccessReviewResponse.Groups.List(), "\n "))
}
return nil
}