util

package
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Published: Feb 13, 2017 License: Apache-2.0 Imports: 12 Imported by: 0

Documentation

Overview

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

Constants

This section is empty.

Variables

This section is empty.

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.

Directories

Path Synopsis
Package config provides utility objects for decoupling sources of configuration and the actual configuration state.
Package config provides utility objects for decoupling sources of configuration and the actual configuration state.
Package errors implements various utility functions and types around errors.
Package errors implements various utility functions and types around errors.
Package framer implements simple frame decoding techniques for an io.ReadCloser
Package framer implements simple frame decoding techniques for an io.ReadCloser
Package httpstream adds multiplexed streaming support to HTTP requests and responses via connection upgrades.
Package httpstream adds multiplexed streaming support to HTTP requests and responses via connection upgrades.
Package intstr is a generated protocol buffer package.
Package intstr is a generated protocol buffer package.
package jsonpath is a template engine using jsonpath syntax, which can be seen at http://goessner.net/articles/JsonPath/.
package jsonpath is a template engine using jsonpath syntax, which can be seen at http://goessner.net/articles/JsonPath/.
Package labels provides utilities to work with Kubernetes labels.
Package labels provides utilities to work with Kubernetes labels.
Package rand provides utilities related to randomization.
Package rand provides utilities related to randomization.
Package sets has auto-generated set types.
Package sets has auto-generated set types.
Package wait provides tools for polling or listening for changes to a condition.
Package wait provides tools for polling or listening for changes to a condition.

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