helpers

Documentation

Overview

Borrowed from https://www.calhoun.io/creating-random-strings-in-go/

Index

• func Clone[T any](v T) T
• func CloneFallible[T any](v T) (T, error)
• func DirectoryExists(path string) bool
• func Duration(d time.Duration, dicimal int) time.Duration
• func FileExists(path string) bool
• func GetConfigDirectory() (string, error)
• func HasPipedStdin() bool
• func IsTerminal() bool
• func MakeSimpleTable(out io.Writer, headings []string) (table *tablewriter.Table)
• func MkdirAll(pathname string) error
• func ParseSize(s string, parser func(string) (int64, error), quotient int) (int, error)
• func PathRelativeToCWD(path string) string
• func RandBytes(n int) ([]byte, error)
• func RandHex(n int) (string, error)
• func RandString(n int) (string, error)
• func ReadStdin(maxLength int) (string, error)

Functions

func Clone

func Clone[T any](v T) T

Clone clones *public fields* in a structure. Private fields may or may not be copied, and private pointers may or may not point into the original object.

• this will panic if the structure is not serializable
• See CloneFallible

func CloneFallible

func CloneFallible[T any](v T) (T, error)

CloneFallible clones *public fields* in a structure. Private fields may or may not be copied, and private pointers may or may not point into the original object.

• returns an error if the structure is not serializable
• See Clone

func DirectoryExists

func DirectoryExists(path string) bool

func Duration

func Duration(d time.Duration, dicimal int) time.Duration

func FileExists

func FileExists(path string) bool

func GetConfigDirectory

func GetConfigDirectory() (string, error)

GetConfigDirectory will return where config and state files should be stored, either respecting `FLY_CONFIG_DIR` or defaulting to the user's home directory at `~/.fly`.

func HasPipedStdin

func HasPipedStdin() bool

HasPipedStdin returns if stdin has piped input

func IsTerminal

func IsTerminal() bool

func MakeSimpleTable

func MakeSimpleTable(out io.Writer, headings []string) (table *tablewriter.Table)

func MkdirAll

func MkdirAll(pathname string) error

func ParseSize

func ParseSize(s string, parser func(string) (int64, error), quotient int) (int, error)

func PathRelativeToCWD

func PathRelativeToCWD(path string) string

func RandBytes

func RandBytes(n int) ([]byte, error)

RandBytes generates random bytes of a given length See: https://stackoverflow.com/questions/35781197/generating-a-random-fixed-length-byte-array-in-go

func RandHex

func RandHex(n int) (string, error)

RandHex generates a random hex string of a given length*2

func RandString

func RandString(n int) (string, error)

RandString returns a string of n bytes, consisting of ASCII letters or numbers.

func ReadStdin

func ReadStdin(maxLength int) (string, error)