package util

import "k8s.io/client-go/pkg/util"

Package util implements various utility functions used in both testing and implementation of Kubernetes. Package util may not depend on any other package in the Kubernetes package tree.

Index ¶

• func AllPtrFieldsNil(obj interface{}) bool
• func CompileRegexps(regexpStrings []string) ([]*regexp.Regexp, error)
• func ExecuteTemplate(w io.Writer, templateText string, data interface{}) error
• func ExecuteTemplateToString(templateText string, data interface{}) (string, error)
• func FileExists(filename string) (bool, error)
• func Int32Ptr(i int32) *int32
• func Int32PtrDerefOr(ptr *int32, def int32) int32
• func IntPtr(i int) *int
• func IntPtrDerefOr(ptr *int, def int) int
• func ReadDirNoStat(dirname string) ([]string, error)
• func Umask(mask int) (old int, err error)
• func UsingSystemdInitSystem() bool
• type Trace
• func NewTrace(name string) *Trace
• func (t *Trace) Log()
• func (t *Trace) LogIfLong(threshold time.Duration)
• func (t *Trace) Step(msg string)
• func (t *Trace) TotalTime() time.Duration
• type Trie
• func CreateTrie(list []string) Trie
• func (t *Trie) Add(v string)
• func (t *Trie) GetPrefix(v string) (string, bool)
• func (t *Trie) HasPrefix(v string) bool

Functions ¶

func AllPtrFieldsNil ¶

func AllPtrFieldsNil(obj interface{}) bool

Tests whether all pointer fields in a struct are nil. This is useful when, for example, an API struct is handled by plugins which need to distinguish "no plugin accepted this spec" from "this spec is empty".

This function is only valid for structs and pointers to structs. Any other type will cause a panic. Passing a typed nil pointer will return true.

func CompileRegexps ¶

func CompileRegexps(regexpStrings []string) ([]*regexp.Regexp, error)

Takes a list of strings and compiles them into a list of regular expressions

func ExecuteTemplate ¶

func ExecuteTemplate(w io.Writer, templateText string, data interface{}) error

ExecuteTemplate executes templateText with data and output written to w.

func ExecuteTemplateToString ¶

func ExecuteTemplateToString(templateText string, data interface{}) (string, error)

func FileExists ¶

func FileExists(filename string) (bool, error)

func Int32Ptr ¶

func Int32Ptr(i int32) *int32

Int32Ptr returns a pointer to an int32

func Int32PtrDerefOr ¶

func Int32PtrDerefOr(ptr *int32, def int32) int32

Int32PtrDerefOr dereference the int32 ptr and returns it i not nil, else returns def.

func IntPtr ¶

func IntPtr(i int) *int

IntPtr returns a pointer to an int

func IntPtrDerefOr ¶

func IntPtrDerefOr(ptr *int, def int) int

IntPtrDerefOr dereference the int ptr and returns it i not nil, else returns def.

func ReadDirNoStat ¶

func ReadDirNoStat(dirname string) ([]string, error)

ReadDirNoStat returns a string of files/directories contained in dirname without calling lstat on them.

func Umask ¶

func Umask(mask int) (old int, err error)

func UsingSystemdInitSystem ¶

func UsingSystemdInitSystem() bool

Detects if using systemd as the init system Please note that simply reading /proc/1/cmdline can be misleading because some installation of various init programs can automatically make /sbin/init a symlink or even a renamed version of their main program. TODO(dchen1107): realiably detects the init system using on the system: systemd, upstart, initd, etc.

Types ¶

type Trace ¶

type Trace struct {
	// contains filtered or unexported fields
}

func NewTrace ¶

func NewTrace(name string) *Trace

func (*Trace) Log ¶

func (t *Trace) Log()

func (*Trace) LogIfLong ¶

func (t *Trace) LogIfLong(threshold time.Duration)

func (*Trace) Step ¶

func (t *Trace) Step(msg string)

func (*Trace) TotalTime ¶

func (t *Trace) TotalTime() time.Duration

type Trie ¶

type Trie struct {
	// contains filtered or unexported fields
}

A simple trie implementation with Add an HasPrefix methods only.

func CreateTrie ¶

func CreateTrie(list []string) Trie

CreateTrie creates a Trie and add all strings in the provided list to it.

func (*Trie) Add ¶

func (t *Trie) Add(v string)

Add adds a word to this trie

func (*Trie) GetPrefix ¶

func (t *Trie) GetPrefix(v string) (string, bool)

GetPrefix is like HasPrefix but return the prefix in case of match or empty string otherwise.

func (*Trie) HasPrefix ¶

func (t *Trie) HasPrefix(v string) bool

HasPrefix returns true of v has any of the prefixes stored in this trie.

Source Files ¶

doc.go template.go trace.go trie.go umask.go util.go

Directories ¶