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/*
Copyright 2018 The Kubernetes 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 genericclioptions
import (
"github.com/spf13/pflag"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/kubernetes/pkg/kubectl/genericclioptions/resource"
)
// ResourceBuilderFlags are flags for finding resources
// TODO(juanvallejo): wire --local flag from commands through
type ResourceBuilderFlags struct {
FileNameFlags *FileNameFlags
LabelSelector *string
FieldSelector *string
AllNamespaces *bool
All *bool
Local *bool
IncludeUninitialized *bool
Scheme *runtime.Scheme
Latest bool
StopOnFirstError bool
}
// NewResourceBuilderFlags returns a default ResourceBuilderFlags
func NewResourceBuilderFlags() *ResourceBuilderFlags {
filenames := []string{}
return &ResourceBuilderFlags{
FileNameFlags: &FileNameFlags{
Usage: "identifying the resource.",
Filenames: &filenames,
Recursive: boolPtr(true),
},
}
}
func (o *ResourceBuilderFlags) WithFile(recurse bool, files ...string) *ResourceBuilderFlags {
o.FileNameFlags = &FileNameFlags{
Usage: "identifying the resource.",
Filenames: &files,
Recursive: boolPtr(recurse),
}
return o
}
func (o *ResourceBuilderFlags) WithLabelSelector(selector string) *ResourceBuilderFlags {
o.LabelSelector = &selector
return o
}
func (o *ResourceBuilderFlags) WithFieldSelector(selector string) *ResourceBuilderFlags {
o.FieldSelector = &selector
return o
}
func (o *ResourceBuilderFlags) WithAllNamespaces(defaultVal bool) *ResourceBuilderFlags {
o.AllNamespaces = &defaultVal
return o
}
func (o *ResourceBuilderFlags) WithAll(defaultVal bool) *ResourceBuilderFlags {
o.All = &defaultVal
return o
}
func (o *ResourceBuilderFlags) WithLocal(defaultVal bool) *ResourceBuilderFlags {
o.Local = &defaultVal
return o
}
// WithUninitialized is using an alpha feature and may be dropped
func (o *ResourceBuilderFlags) WithUninitialized(defaultVal bool) *ResourceBuilderFlags {
o.IncludeUninitialized = &defaultVal
return o
}
func (o *ResourceBuilderFlags) WithScheme(scheme *runtime.Scheme) *ResourceBuilderFlags {
o.Scheme = scheme
return o
}
func (o *ResourceBuilderFlags) WithLatest() *ResourceBuilderFlags {
o.Latest = true
return o
}
func (o *ResourceBuilderFlags) StopOnError() *ResourceBuilderFlags {
o.StopOnFirstError = true
return o
}
// AddFlags registers flags for finding resources
func (o *ResourceBuilderFlags) AddFlags(flagset *pflag.FlagSet) {
o.FileNameFlags.AddFlags(flagset)
if o.LabelSelector != nil {
flagset.StringVarP(o.LabelSelector, "selector", "l", *o.LabelSelector, "Selector (label query) to filter on, supports '=', '==', and '!='.(e.g. -l key1=value1,key2=value2)")
}
if o.FieldSelector != nil {
flagset.StringVar(o.FieldSelector, "field-selector", *o.FieldSelector, "Selector (field query) to filter on, supports '=', '==', and '!='.(e.g. --field-selector key1=value1,key2=value2). The server only supports a limited number of field queries per type.")
}
if o.AllNamespaces != nil {
flagset.BoolVar(o.AllNamespaces, "all-namespaces", *o.AllNamespaces, "If present, list the requested object(s) across all namespaces. Namespace in current context is ignored even if specified with --namespace.")
}
if o.All != nil {
flagset.BoolVar(o.All, "all", *o.All, "Select all resources in the namespace of the specified resource types")
}
if o.Local != nil {
flagset.BoolVar(o.Local, "local", *o.Local, "If true, annotation will NOT contact api-server but run locally.")
}
if o.IncludeUninitialized != nil {
flagset.BoolVar(o.IncludeUninitialized, "include-uninitialized", *o.IncludeUninitialized, `If true, the kubectl command applies to uninitialized objects. If explicitly set to false, this flag overrides other flags that make the kubectl commands apply to uninitialized objects, e.g., "--all". Objects with empty metadata.initializers are regarded as initialized.`)
}
}
// ToBuilder gives you back a resource finder to visit resources that are located
func (o *ResourceBuilderFlags) ToBuilder(restClientGetter RESTClientGetter, resources []string) ResourceFinder {
namespace, enforceNamespace, namespaceErr := restClientGetter.ToRawKubeConfigLoader().Namespace()
builder := resource.NewBuilder(restClientGetter).
NamespaceParam(namespace).DefaultNamespace()
if o.Scheme != nil {
builder.WithScheme(o.Scheme, o.Scheme.PrioritizedVersionsAllGroups()...)
} else {
builder.Unstructured()
}
if o.FileNameFlags != nil {
opts := o.FileNameFlags.ToOptions()
builder.FilenameParam(enforceNamespace, &opts)
}
if o.Local == nil || !*o.Local {
// resource type/name tuples only work non-local
if o.All != nil {
builder.ResourceTypeOrNameArgs(*o.All, resources...)
} else {
builder.ResourceTypeOrNameArgs(false, resources...)
}
// label selectors only work non-local (for now)
if o.LabelSelector != nil {
builder.LabelSelectorParam(*o.LabelSelector)
}
// field selectors only work non-local (forever)
if o.FieldSelector != nil {
builder.FieldSelectorParam(*o.FieldSelector)
}
// latest only works non-local (forever)
if o.Latest {
builder.Latest()
}
} else {
builder.Local()
if len(resources) > 0 {
builder.AddError(resource.LocalResourceError)
}
}
if o.IncludeUninitialized != nil {
builder.IncludeUninitialized(*o.IncludeUninitialized)
}
if !o.StopOnFirstError {
builder.ContinueOnError()
}
return &ResourceFindBuilderWrapper{
builder: builder.
Flatten(). // I think we're going to recommend this everywhere
AddError(namespaceErr),
}
}
// ResourceFindBuilderWrapper wraps a builder in an interface
type ResourceFindBuilderWrapper struct {
builder *resource.Builder
}
// Do finds you resources to check
func (b *ResourceFindBuilderWrapper) Do() resource.Visitor {
return b.builder.Do()
}
// ResourceFinder allows mocking the resource builder
// TODO resource builders needs to become more interfacey
type ResourceFinder interface {
Do() resource.Visitor
}
// ResourceFinderFunc is a handy way to make a ResourceFinder
type ResourceFinderFunc func() resource.Visitor
// Do implements ResourceFinder
func (fn ResourceFinderFunc) Do() resource.Visitor {
return fn()
}
// ResourceFinderForResult skins a visitor for re-use as a ResourceFinder
func ResourceFinderForResult(result resource.Visitor) ResourceFinder {
return ResourceFinderFunc(func() resource.Visitor {
return result
})
}
func strPtr(val string) *string {
return &val
}
func boolPtr(val bool) *bool {
return &val
}
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