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115 lines
4.2 KiB
Go
115 lines
4.2 KiB
Go
/*
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Copyright 2018 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package wait
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import (
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"strings"
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"github.com/spf13/cobra"
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"github.com/spf13/pflag"
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"k8s.io/kubernetes/pkg/kubectl/genericclioptions"
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"k8s.io/kubernetes/pkg/kubectl/genericclioptions/resource"
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)
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// ResourceBuilderFlags are flags for finding resources
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type ResourceBuilderFlags struct {
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FilenameOptions resource.FilenameOptions
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LabelSelector string
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FieldSelector string
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AllNamespaces bool
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Namespace string
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ExplicitNamespace bool
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// TODO add conditional support. These are false for now.
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All bool
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Local bool
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}
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// NewResourceBuilderFlags returns a default ResourceBuilderFlags
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func NewResourceBuilderFlags() *ResourceBuilderFlags {
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return &ResourceBuilderFlags{
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FilenameOptions: resource.FilenameOptions{
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Recursive: true,
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},
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}
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}
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// AddFlags registers flags for finding resources
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func (o *ResourceBuilderFlags) AddFlags(flagset *pflag.FlagSet) {
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flagset.StringSliceVarP(&o.FilenameOptions.Filenames, "filename", "f", o.FilenameOptions.Filenames, "Filename, directory, or URL to files identifying the resource.")
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annotations := make([]string, 0, len(resource.FileExtensions))
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for _, ext := range resource.FileExtensions {
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annotations = append(annotations, strings.TrimLeft(ext, "."))
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}
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flagset.SetAnnotation("filename", cobra.BashCompFilenameExt, annotations)
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flagset.BoolVar(&o.FilenameOptions.Recursive, "recursive", o.FilenameOptions.Recursive, "Process the directory used in -f, --filename recursively. Useful when you want to manage related manifests organized within the same directory.")
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flagset.StringVarP(&o.LabelSelector, "selector", "l", o.LabelSelector, "Selector (label query) to filter on, supports '=', '==', and '!='.(e.g. -l key1=value1,key2=value2)")
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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.")
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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.")
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}
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// ToBuilder gives you back a resource finder to visit resources that are located
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func (o *ResourceBuilderFlags) ToBuilder(restClientGetter genericclioptions.RESTClientGetter, resources []string) ResourceFinder {
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namespace, enforceNamespace, namespaceErr := restClientGetter.ToRawKubeConfigLoader().Namespace()
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return &ResourceFindBuilderWrapper{
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builder: resource.NewBuilder(restClientGetter).
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Unstructured().
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NamespaceParam(namespace).DefaultNamespace().
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FilenameParam(enforceNamespace, &o.FilenameOptions).
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LabelSelectorParam(o.LabelSelector).
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FieldSelectorParam(o.FieldSelector).
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ResourceTypeOrNameArgs(o.All, resources...).
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Latest().
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Flatten().
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AddError(namespaceErr),
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}
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}
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// ResourceFindBuilderWrapper wraps a builder in an interface
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type ResourceFindBuilderWrapper struct {
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builder *resource.Builder
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}
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// Do finds you resources to check
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func (b *ResourceFindBuilderWrapper) Do() resource.Visitor {
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return b.builder.Do()
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}
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// ResourceFinder allows mocking the resource builder
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// TODO resource builders needs to become more interfacey
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type ResourceFinder interface {
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Do() resource.Visitor
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}
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// ResourceFinderFunc is a handy way to make a ResourceFinder
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type ResourceFinderFunc func() resource.Visitor
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// Do implements ResourceFinder
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func (fn ResourceFinderFunc) Do() resource.Visitor {
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return fn()
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}
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// ResourceFinderForResult skins a visitor for re-use as a ResourceFinder
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func ResourceFinderForResult(result resource.Visitor) ResourceFinder {
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return ResourceFinderFunc(func() resource.Visitor {
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return result
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})
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}
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