util

package
v0.20.4 Latest Latest
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 Go to latest Published: Feb 18, 2021 License: Apache-2.0 Imports: 38 Imported by: 1,076

Documentation

Index

Constants

View Source 
const (
	ApplyAnnotationsFlag = "save-config"
	DefaultErrorExitCode = 1
)

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 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 AddGeneratorFlags 

func AddGeneratorFlags(cmd *cobra.Command, defaultGenerator string)

AddGeneratorFlags adds flags common to resource generation commands TODO: need to take a pass at other generator commands to use this set of flags

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 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 AddValidateFlags 

func AddValidateFlags(cmd *cobra.Command)

func AddValidateOptionFlags 

func AddValidateOptionFlags(cmd *cobra.Command, options *ValidateOptions)

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 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 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 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 requires JSON serialization 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 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(validate bool) (validation.Schema, error)
	// OpenAPISchema returns the schema openapi schema definition
	OpenAPISchema() (openapi.Resources, 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 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 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 {
	EnableValidation bool
}

Source Files

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Directories

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