util

package
Version: v0.26.1 Latest Latest
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Published: Jan 19, 2023 License: Apache-2.0 Imports: 44 Imported by: 664

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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 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, verifier *resource.QueryParamVerifier) (validation.Schema, error)
	// OpenAPISchema returns the parsed openapi schema definition
	OpenAPISchema() (openapi.Resources, error)
	// OpenAPIGetter returns a getter for the openapi schema document
	OpenAPIGetter() discovery.OpenAPISchemaInterface
}

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 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

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
}

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