util

package
v0.31.3 Latest Latest
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 Go to latest Published: Nov 21, 2024 License: Apache-2.0 Imports: 45 Imported by: 1,089

Documentation

Index

Constants

View Source 
const (
	ApplyAnnotationsFlag = "save-config"
	DefaultErrorExitCode = 1
	DefaultChunkSize     = 500
)
View Source 
const DefaultOverrideType = OverrideTypeMerge

Variables

View Source 
var ErrExit = fmt.Errorf("exit")

ErrExit may be passed to CheckError to instruct it to output nothing but exit with status code 1.

Functions

func AddApplyAnnotationFlags 

func AddApplyAnnotationFlags(cmd *cobra.Command)

func AddApplyAnnotationVarFlags 

func AddApplyAnnotationVarFlags(cmd *cobra.Command, applyAnnotation *bool)

func AddChunkSizeFlag added in v0.22.0 

func AddChunkSizeFlag(cmd *cobra.Command, value *int64)

func AddContainerVarFlags added in v0.21.0 

func AddContainerVarFlags(cmd *cobra.Command, p *string, containerName string)

func AddDryRunFlag 

func AddDryRunFlag(cmd *cobra.Command)

AddDryRunFlag adds dry-run flag to a command. Usually used by mutations.

func AddFieldManagerFlagVar added in v0.19.0 

func AddFieldManagerFlagVar(cmd *cobra.Command, p *string, defaultFieldManager string)

func AddFilenameOptionFlags 

func AddFilenameOptionFlags(cmd *cobra.Command, options *resource.FilenameOptions, usage string)

func AddFromEnvFile added in v0.21.0 

func AddFromEnvFile(filePath string, addTo func(key, value string) error) error

AddFromEnvFile processes an env file allows a generic addTo to handle the collection of key value pairs or returns an error.

func AddJsonFilenameFlag 

func AddJsonFilenameFlag(flags *pflag.FlagSet, value *[]string, usage string)

func AddKustomizeFlag 

func AddKustomizeFlag(flags *pflag.FlagSet, value *string)

AddKustomizeFlag adds kustomize flag to a command

func AddLabelSelectorFlagVar added in v0.24.0 

func AddLabelSelectorFlagVar(cmd *cobra.Command, p *string)

func AddPodRunningTimeoutFlag 

func AddPodRunningTimeoutFlag(cmd *cobra.Command, defaultTimeout time.Duration)

func AddPruningFlags added in v0.27.0 

func AddPruningFlags(cmd *cobra.Command, prune *bool, pruneAllowlist *[]string, all *bool, applySetRef *string)

func AddServerSideApplyFlags 

func AddServerSideApplyFlags(cmd *cobra.Command)

func AddSourceToErr 

func AddSourceToErr(verb string, source string, err error) error

AddSourceToErr adds handleResourcePrefix and source string to error message. verb is the string like "creating", "deleting" etc. source is the filename or URL to the template file(*.json or *.yaml), or stdin to use to handle the resource.

func AddSubresourceFlags added in v0.24.0 

func AddSubresourceFlags(cmd *cobra.Command, subresource *string, usage string, allowedSubresources ...string)

func AddValidateFlags 

func AddValidateFlags(cmd *cobra.Command)

func BehaviorOnFatal 

func BehaviorOnFatal(f func(string, int))

BehaviorOnFatal allows you to override the default behavior when a fatal error occurs, which is to call os.Exit(code). You can pass 'panic' as a function here if you prefer the panic() over os.Exit(1).

func CheckDiffErr added in v0.18.0 

func CheckDiffErr(err error)

CheckDiffErr prints a user friendly error to STDERR and exits with a non-zero and non-one exit code. Unrecognized errors will be printed with an "error: " prefix.

This method is meant specifically for `kubectl diff` and may be used by other commands.

func CheckErr 

func CheckErr(err error)

CheckErr prints a user friendly error to STDERR and exits with a non-zero exit code. Unrecognized errors will be printed with an "error: " prefix.

This method is generic to the command in use and may be used by non-Kubectl commands.

func DefaultBehaviorOnFatal 

func DefaultBehaviorOnFatal()

DefaultBehaviorOnFatal allows you to undo any previous override. Useful in tests.

func DefaultSubCommandRun 

func DefaultSubCommandRun(out io.Writer) func(c *cobra.Command, args []string)

DefaultSubCommandRun prints a command's help string to the specified output if no arguments (sub-commands) are provided, or a usage error otherwise.

func Difference added in v0.23.0 

func Difference(fullArray []string, subArray []string) []string

Difference removes any elements of subArray from fullArray and returns the result

func DumpReaderToFile 

func DumpReaderToFile(reader io.Reader, filename string) error

DumpReaderToFile writes all data from the given io.Reader to the specified file (usually for temporary use).

func GetFieldManagerFlag 

func GetFieldManagerFlag(cmd *cobra.Command) string

func GetFlagBool 

func GetFlagBool(cmd *cobra.Command, flag string) bool

func GetFlagDuration 

func GetFlagDuration(cmd *cobra.Command, flag string) time.Duration

func GetFlagInt 

func GetFlagInt(cmd *cobra.Command, flag string) int

Assumes the flag has a default value.

func GetFlagInt32 

func GetFlagInt32(cmd *cobra.Command, flag string) int32

Assumes the flag has a default value.

func GetFlagInt64 

func GetFlagInt64(cmd *cobra.Command, flag string) int64

Assumes the flag has a default value.

func GetFlagString 

func GetFlagString(cmd *cobra.Command, flag string) string

func GetFlagStringArray 

func GetFlagStringArray(cmd *cobra.Command, flag string) []string

GetFlagStringArray can be used to accept multiple argument with flag repetition (e.g. -f arg1 -f arg2 ...)

func GetFlagStringSlice 

func GetFlagStringSlice(cmd *cobra.Command, flag string) []string

GetFlagStringSlice can be used to accept multiple argument with flag repetition (e.g. -f arg1,arg2 -f arg3 ...)

func GetForceConflictsFlag 

func GetForceConflictsFlag(cmd *cobra.Command) bool

func GetPodRunningTimeoutFlag 

func GetPodRunningTimeoutFlag(cmd *cobra.Command) (time.Duration, error)

func GetResourcesAndPairs 

func GetResourcesAndPairs(args []string, pairType string) (resources []string, pairArgs []string, err error)

GetResourcesAndPairs retrieves resources and "KEY=VALUE or KEY-" pair args from given args

func GetServerSideApplyFlag 

func GetServerSideApplyFlag(cmd *cobra.Command) bool

func GetValidationDirective added in v0.24.0 

func GetValidationDirective(cmd *cobra.Command) (string, error)

func IsFilenameSliceEmpty 

func IsFilenameSliceEmpty(filenames []string, directory string) bool

func IsSiblingCommandExists 

func IsSiblingCommandExists(cmd *cobra.Command, targetCmdName string) bool

IsSiblingCommandExists receives a pointer to a cobra command and a target string. Returns true if the target string is found in the list of sibling commands.

func JSONPatch added in v0.23.0 

func JSONPatch(codec runtime.Codec, dst runtime.Object, fragment string) (runtime.Object, error)

JSONPatch converts the passed in object to JSON, performs an RFC6902 JSON Patch using operations specified in the fragment, and returns the resulting object

func ManualStrip 

func ManualStrip(file []byte) []byte

ManualStrip is used for dropping comments from a YAML file

func Merge 

func Merge(codec runtime.Codec, dst runtime.Object, fragment string) (runtime.Object, error)

Merge converts the passed in object to JSON, merges the fragment into it using an RFC7396 JSON Merge Patch, and returns the resulting object TODO: merge assumes JSON serialization, and does not properly abstract API retrieval

func MultilineError 

func MultilineError(prefix string, err error) string

MultilineError returns a string representing an error that splits sub errors into their own lines. The returned string will end with a newline.

func MultipleErrors 

func MultipleErrors(prefix string, errs []error) string

MultipleErrors returns a newline delimited string containing the prefix and referenced errors in standard form.

func ParsePairs 

func ParsePairs(pairArgs []string, pairType string, supportRemove bool) (newPairs map[string]string, removePairs []string, err error)

ParsePairs retrieves new and remove pairs (if supportRemove is true) from "KEY=VALUE or KEY-" pair args

func PrintErrorWithCauses 

func PrintErrorWithCauses(err error, errOut io.Writer) bool

PrintErrorWithCauses prints an error's kind, name, and each of the error's causes in a new line. The returned string will end with a newline. Returns true if a case exists to handle the error type, or false otherwise.

func PrintFlagsWithDryRunStrategy added in v0.18.0 

func PrintFlagsWithDryRunStrategy(printFlags *genericclioptions.PrintFlags, dryRunStrategy DryRunStrategy) *genericclioptions.PrintFlags

PrintFlagsWithDryRunStrategy sets a success message at print time for the dry run strategy

TODO(juanvallejo): This can be cleaned up even further by creating a PrintFlags struct that binds the --dry-run flag, and whose ToPrinter method returns a printer that understands how to print this success message.

func RequireNoArguments 

func RequireNoArguments(c *cobra.Command, args []string)

RequireNoArguments exits with a usage error if extra arguments are provided.

func StandardErrorMessage 

func StandardErrorMessage(err error) (string, bool)

StandardErrorMessage translates common errors into a human readable message, or returns false if the error is not one of the recognized types. It may also log extended information to klog.

This method is generic to the command in use and may be used by non-Kubectl commands.

func StrategicMerge added in v0.23.0 

func StrategicMerge(codec runtime.Codec, dst runtime.Object, fragment string, dataStruct runtime.Object) (runtime.Object, error)

StrategicMerge converts the passed in object to JSON, merges the fragment into it using a Strategic Merge Patch, and returns the resulting object

func StripComments 

func StripComments(file []byte) []byte

StripComments will transform a YAML file into JSON, thus dropping any comments in it. Note that if the given file has a syntax error, the transformation will fail and we will manually drop all comments from the file.

func SuggestAPIResources 

func SuggestAPIResources(parent string) string

SuggestAPIResources returns a suggestion to use the "api-resources" command to retrieve a supported list of resources

func UsageErrorf 

func UsageErrorf(cmd *cobra.Command, format string, args ...interface{}) error

func Warning 

func Warning(cmdErr io.Writer, newGeneratorName, oldGeneratorName string)

Types

type DryRunStrategy added in v0.18.0 

type DryRunStrategy int
const (
	// DryRunNone indicates the client will make all mutating calls
	DryRunNone DryRunStrategy = iota

	// DryRunClient, or client-side dry-run, indicates the client will prevent
	// making mutating calls such as CREATE, PATCH, and DELETE
	DryRunClient

	// DryRunServer, or server-side dry-run, indicates the client will send
	// mutating calls to the APIServer with the dry-run parameter to prevent
	// persisting changes.
	//
	// Note that clients sending server-side dry-run calls should verify that
	// the APIServer and the resource supports server-side dry-run, and otherwise
	// clients should fail early.
	//
	// If a client sends a server-side dry-run call to an APIServer that doesn't
	// support server-side dry-run, then the APIServer will persist changes inadvertently.
	DryRunServer
)

func GetDryRunStrategy added in v0.18.0 

func GetDryRunStrategy(cmd *cobra.Command) (DryRunStrategy, error)

type Factory 

type Factory interface {
	genericclioptions.RESTClientGetter

	// DynamicClient returns a dynamic client ready for use
	DynamicClient() (dynamic.Interface, error)

	// KubernetesClientSet gives you back an external clientset
	KubernetesClientSet() (*kubernetes.Clientset, error)

	// Returns a RESTClient for accessing Kubernetes resources or an error.
	RESTClient() (*restclient.RESTClient, error)

	// NewBuilder returns an object that assists in loading objects from both disk and the server
	// and which implements the common patterns for CLI interactions with generic resources.
	NewBuilder() *resource.Builder

	// Returns a RESTClient for working with the specified RESTMapping or an error. This is intended
	// for working with arbitrary resources and is not guaranteed to point to a Kubernetes APIServer.
	ClientForMapping(mapping *meta.RESTMapping) (resource.RESTClient, error)
	// Returns a RESTClient for working with Unstructured objects.
	UnstructuredClientForMapping(mapping *meta.RESTMapping) (resource.RESTClient, error)

	// Returns a schema that can validate objects stored on disk.
	Validator(validationDirective string) (validation.Schema, error)

	// Used for retrieving openapi v2 resources.
	openapi.OpenAPIResourcesGetter

	// OpenAPIV3Schema returns a client for fetching parsed schemas for
	// any group version
	OpenAPIV3Client() (openapiclient.Client, error)
}

Factory provides abstractions that allow the Kubectl command to be extended across multiple types of resources and different API sets. The rings are here for a reason. In order for composers to be able to provide alternative factory implementations they need to provide low level pieces of *certain* functions so that when the factory calls back into itself it uses the custom version of the function. Rather than try to enumerate everything that someone would want to override we split the factory into rings, where each ring can depend on methods in an earlier ring, but cannot depend upon peer methods in its own ring. TODO: make the functions interfaces TODO: pass the various interfaces on the factory directly into the command constructors (so the commands are decoupled from the factory).

func NewFactory 

func NewFactory(clientGetter genericclioptions.RESTClientGetter) Factory

type FeatureGate added in v0.27.0 

type FeatureGate string
const (
	ApplySet                FeatureGate = "KUBECTL_APPLYSET"
	CmdPluginAsSubcommand   FeatureGate = "KUBECTL_ENABLE_CMD_SHADOW"
	OpenAPIV3Patch          FeatureGate = "KUBECTL_OPENAPIV3_PATCH"
	RemoteCommandWebsockets FeatureGate = "KUBECTL_REMOTE_COMMAND_WEBSOCKETS"
	PortForwardWebsockets   FeatureGate = "KUBECTL_PORT_FORWARD_WEBSOCKETS"
	DebugCustomProfile      FeatureGate = "KUBECTL_DEBUG_CUSTOM_PROFILE"
)

func (FeatureGate) IsDisabled added in v0.29.0 

func (f FeatureGate) IsDisabled() bool

IsDisabled returns true iff environment variable is set to false. All other cases, it returns true. This function is used for the cases where feature is enabled by default, but it may be needed to provide a way to ability to disable this feature.

func (FeatureGate) IsEnabled added in v0.27.0 

func (f FeatureGate) IsEnabled() bool

IsEnabled returns true iff environment variable is set to true. All other cases, it returns false.

type MatchVersionFlags 

type MatchVersionFlags struct {
	Delegate genericclioptions.RESTClientGetter

	RequireMatchedServerVersion bool
	// contains filtered or unexported fields
}

MatchVersionFlags is for setting the "match server version" function.

func NewMatchVersionFlags 

func NewMatchVersionFlags(delegate genericclioptions.RESTClientGetter) *MatchVersionFlags

func (*MatchVersionFlags) AddFlags 

func (f *MatchVersionFlags) AddFlags(flags *pflag.FlagSet)

func (*MatchVersionFlags) ToDiscoveryClient 

func (f *MatchVersionFlags) ToDiscoveryClient() (discovery.CachedDiscoveryInterface, error)

func (*MatchVersionFlags) ToRESTConfig 

func (f *MatchVersionFlags) ToRESTConfig() (*rest.Config, error)

ToRESTConfig implements RESTClientGetter. Returns a REST client configuration based on a provided path to a .kubeconfig file, loading rules, and config flag overrides. Expects the AddFlags method to have been called.

func (*MatchVersionFlags) ToRESTMapper 

func (f *MatchVersionFlags) ToRESTMapper() (meta.RESTMapper, error)

ToRESTMapper returns a mapper.

func (*MatchVersionFlags) ToRawKubeConfigLoader 

func (f *MatchVersionFlags) ToRawKubeConfigLoader() clientcmd.ClientConfig

type OverrideOptions added in v0.23.0 

type OverrideOptions struct {
	Overrides    string
	OverrideType OverrideType
}

func (*OverrideOptions) AddOverrideFlags added in v0.23.0 

func (o *OverrideOptions) AddOverrideFlags(cmd *cobra.Command)

func (*OverrideOptions) NewOverrider added in v0.23.0 

func (o *OverrideOptions) NewOverrider(dataStruct runtime.Object) *Overrider

type OverrideType added in v0.23.0 

type OverrideType string
const (
	// OverrideTypeJSON will use an RFC6902 JSON Patch to alter the generated output
	OverrideTypeJSON OverrideType = "json"

	// OverrideTypeMerge will use an RFC7396 JSON Merge Patch to alter the generated output
	OverrideTypeMerge OverrideType = "merge"

	// OverrideTypeStrategic will use a Strategic Merge Patch to alter the generated output
	OverrideTypeStrategic OverrideType = "strategic"
)

type Overrider added in v0.23.0 

type Overrider struct {
	Options    *OverrideOptions
	DataStruct runtime.Object
}

func (*Overrider) Apply added in v0.23.0 

func (o *Overrider) Apply(obj runtime.Object) (runtime.Object, error)

type ScaleClientFunc 

type ScaleClientFunc func(genericclioptions.RESTClientGetter) (scale.ScalesGetter, error)

ScaleClientFunc provides a ScalesGetter 

var ScaleClientFn ScaleClientFunc = scaleClient

ScaleClientFn gives a way to easily override the function for unit testing if needed.

type ValidateOptions 

type ValidateOptions struct {
	ValidationDirective string
}

Source Files

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Directories

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