util

Documentation

Index

• func BoolToPtr(b bool) *bool
• func Bunzip2(dst io.Writer, src io.Reader) (written int64, err error)
• func Bunzip2File(dst, src string) error
• func CopyProgress(level capnslog.LogLevel, prefix string, writer io.Writer, reader io.Reader, ...) (int64, error)
• func LogFrom(l capnslog.LogLevel, r io.Reader)
• func Retry(attempts int, delay time.Duration, f func() error) error
• func RetryConditional(attempts int, delay time.Duration, shouldRetry func(err error) bool, ...) error
• func StrToPtr(s string) *string
• func WaitUntilReady(timeout, delay time.Duration, checkFunction func() (bool, error)) error
• func XZ2File(dst, src string) error
• type ImageInfo
  • func GetImageInfo(path string) (*ImageInfo, error)

Functions

func BoolToPtr

func BoolToPtr(b bool) *bool

func Bunzip2

func Bunzip2(dst io.Writer, src io.Reader) (written int64, err error)

Bunzip2 does bunzip2 decompression from src to dst.

It matches the signature of io.Copy.

func Bunzip2File

func Bunzip2File(dst, src string) error

Bunzip2File does bunzip2 decompression from src file into dst file.

func CopyProgress

func CopyProgress(level capnslog.LogLevel, prefix string, writer io.Writer, reader io.Reader, total int64) (int64, error)

CopyProgress copies data from reader into writter, logging progress through level.

func LogFrom

func LogFrom(l capnslog.LogLevel, r io.Reader)

LogFrom reads lines from reader r and sends them to logger l.

func Retry

func Retry(attempts int, delay time.Duration, f func() error) error

Retry calls function f until it has been called attemps times, or succeeds. Retry delays for delay between calls of f. If f does not succeed after attempts calls, the error from the last call is returned.

func RetryConditional

func RetryConditional(attempts int, delay time.Duration, shouldRetry func(err error) bool, f func() error) error

RetryConditional calls function f until it has been called attemps times, or succeeds. Retry delays for delay between calls of f. If f does not succeed after attempts calls, the error from the last call is returned. If shouldRetry returns false on the error generated, RetryConditional stops immediately and returns the error

func StrToPtr

func StrToPtr(s string) *string

func WaitUntilReady

func WaitUntilReady(timeout, delay time.Duration, checkFunction func() (bool, error)) error

func XZ2File

func XZ2File(dst, src string) error

XZ2File does xz decompression from src file into dst file

Types

type ImageInfo

type ImageInfo struct {
	Format      string `json:"format"`
	VirtualSize uint64 `json:"virtual-size"`
}

func GetImageInfo

func GetImageInfo(path string) (*ImageInfo, error)