mirror of
https://github.com/optim-enterprises-bv/kubernetes.git
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90 lines
3.2 KiB
Go
90 lines
3.2 KiB
Go
/*
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Copyright 2017 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 util
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import (
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"github.com/pkg/errors"
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"github.com/spf13/cobra"
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"github.com/spf13/pflag"
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"k8s.io/client-go/tools/clientcmd"
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"k8s.io/klog/v2"
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"k8s.io/kubernetes/cmd/kubeadm/app/cmd/options"
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kubeadmconstants "k8s.io/kubernetes/cmd/kubeadm/app/constants"
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)
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// SubCmdRunE returns a function that handles a case where a subcommand must be specified
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// Without this callback, if a user runs just the command without a subcommand,
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// or with an invalid subcommand, cobra will print usage information, but still exit cleanly.
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// We want to return an error code in these cases so that the
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// user knows that their command was invalid.
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func SubCmdRunE(name string) func(*cobra.Command, []string) error {
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return func(_ *cobra.Command, args []string) error {
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if len(args) < 1 {
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return errors.Errorf("missing subcommand; %q is not meant to be run on its own", name)
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}
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return errors.Errorf("invalid subcommand: %q", args[0])
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}
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}
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// ValidateExactArgNumber validates that the required top-level arguments are specified
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func ValidateExactArgNumber(args []string, supportedArgs []string) error {
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lenSupported := len(supportedArgs)
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validArgs := 0
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// Disregard possible "" arguments; they are invalid
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for _, arg := range args {
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if len(arg) > 0 {
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validArgs++
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}
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// break early for too many arguments
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if validArgs > lenSupported {
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return errors.Errorf("too many arguments. Required arguments: %v", supportedArgs)
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}
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}
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if validArgs < lenSupported {
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return errors.Errorf("missing one or more required arguments. Required arguments: %v", supportedArgs)
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}
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return nil
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}
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// GetKubeConfigPath can be used to search for a kubeconfig in standard locations
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// if and empty string is passed to the function. If a non-empty string is passed
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// the function returns the same string.
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func GetKubeConfigPath(file string) string {
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// If a value is provided respect that.
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if file != "" {
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return file
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}
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// Find a config in the standard locations using DefaultClientConfigLoadingRules,
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// but also consider the default config path.
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rules := clientcmd.NewDefaultClientConfigLoadingRules()
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rules.Precedence = append(rules.Precedence, kubeadmconstants.GetAdminKubeConfigPath())
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file = rules.GetDefaultFilename()
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klog.V(1).Infof("Using kubeconfig file: %s", file)
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return file
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}
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// AddCRISocketFlag adds the cri-socket flag to the supplied flagSet
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func AddCRISocketFlag(flagSet *pflag.FlagSet, criSocket *string) {
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flagSet.StringVar(
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criSocket, options.NodeCRISocket, *criSocket,
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"Path to the CRI socket to connect. If empty kubeadm will try to auto-detect this value; use this option only if you have more than one CRI installed or if you have non-standard CRI socket.",
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)
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}
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