utils

Documentation

Index

• func CompareKernelVersion(a, b *KernelVersionInfo) int
• func CopyEscapable(dst io.Writer, src io.ReadCloser) (written int64, err error)
• func Debugf(format string, a ...interface{})
• func Download(url string, stderr io.Writer) (*http.Response, error)
• func FindCgroupMountpoint(cgroupType string) (string, error)
• func GetTotalUsedFds() int
• func Go(f func() error) chan error
• func HashData(src io.Reader) (string, error)
• func HumanDuration(d time.Duration) string
• func NewBufReader(r io.Reader) *bufReader
• func NopWriteCloser(w io.Writer) io.WriteCloser
• func ProgressReader(r io.ReadCloser, size int, output io.Writer, template string) *progressReader
• func SelfPath() string
• func Trunc(s string, maxlen int) string
• func TruncateId(id string) string
• type KernelVersionInfo
  • func GetKernelVersion() (*KernelVersionInfo, error)
  • func (k *KernelVersionInfo) String() string
• type NopFlusher
  • func (f *NopFlusher) Flush()
• type NopWriter
  • func (w *NopWriter) Write(buf []byte) (int, error)
• type TruncIndex
  • func NewTruncIndex() *TruncIndex
  • func (idx *TruncIndex) Add(id string) error
  • func (idx *TruncIndex) Delete(id string) error
  • func (idx *TruncIndex) Get(s string) (string, error)
• type Utsname
• type WriteBroadcaster
  • func NewWriteBroadcaster() *WriteBroadcaster
  • func (w *WriteBroadcaster) AddWriter(writer io.WriteCloser)
  • func (w *WriteBroadcaster) CloseWriters() error
  • func (w *WriteBroadcaster) RemoveWriter(writer io.WriteCloser)
  • func (w *WriteBroadcaster) Write(p []byte) (n int, err error)
• type WriteFlusher
  • func NewWriteFlusher(w io.Writer) *WriteFlusher
  • func (wf *WriteFlusher) Write(b []byte) (n int, err error)

Functions

func CompareKernelVersion

func CompareKernelVersion(a, b *KernelVersionInfo) int

Compare two KernelVersionInfo struct. Returns -1 if a < b, = if a == b, 1 it a > b

func CopyEscapable

func CopyEscapable(dst io.Writer, src io.ReadCloser) (written int64, err error)

Code c/c from io.Copy() modified to handle escape sequence

func Debugf

func Debugf(format string, a ...interface{})

Debug function, if the debug flag is set, then display. Do nothing otherwise If Docker is in damon mode, also send the debug info on the socket

func Download

func Download(url string, stderr io.Writer) (*http.Response, error)

Request a given URL and return an io.Reader

func FindCgroupMountpoint

func FindCgroupMountpoint(cgroupType string) (string, error)

func GetTotalUsedFds

func GetTotalUsedFds() int

func Go

func Go(f func() error) chan error

Go is a basic promise implementation: it wraps calls a function in a goroutine, and returns a channel which will later return the function's return value.

func HashData

func HashData(src io.Reader) (string, error)

func HumanDuration

func HumanDuration(d time.Duration) string

HumanDuration returns a human-readable approximation of a duration (eg. "About a minute", "4 hours ago", etc.)

func NewBufReader

func NewBufReader(r io.Reader) *bufReader

func NopWriteCloser

func NopWriteCloser(w io.Writer) io.WriteCloser

func ProgressReader

func ProgressReader(r io.ReadCloser, size int, output io.Writer, template string) *progressReader

func SelfPath

func SelfPath() string

Figure out the absolute path of our own binary

func Trunc

func Trunc(s string, maxlen int) string

func TruncateId

func TruncateId(id string) string

TruncateId returns a shorthand version of a string identifier for convenience. A collision with other shorthands is very unlikely, but possible. In case of a collision a lookup with TruncIndex.Get() will fail, and the caller will need to use a langer prefix, or the full-length Id.

Types

type KernelVersionInfo

type KernelVersionInfo struct {
	Kernel int
	Major  int
	Minor  int
	Flavor string
}

func GetKernelVersion

func GetKernelVersion() (*KernelVersionInfo, error)

func (*KernelVersionInfo) String

func (k *KernelVersionInfo) String() string

type NopFlusher

type NopFlusher struct{}

func (*NopFlusher) Flush

func (f *NopFlusher) Flush()

type NopWriter

type NopWriter struct {
}

func (*NopWriter) Write

func (w *NopWriter) Write(buf []byte) (int, error)

type TruncIndex

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

TruncIndex allows the retrieval of string identifiers by any of their unique prefixes. This is used to retrieve image and container IDs by more convenient shorthand prefixes.

func NewTruncIndex

func NewTruncIndex() *TruncIndex

func (*TruncIndex) Add

func (idx *TruncIndex) Add(id string) error

func (*TruncIndex) Delete

func (idx *TruncIndex) Delete(id string) error

func (*TruncIndex) Get

func (idx *TruncIndex) Get(s string) (string, error)

type Utsname

type Utsname syscall.Utsname

type WriteBroadcaster

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

func NewWriteBroadcaster

func NewWriteBroadcaster() *WriteBroadcaster

func (*WriteBroadcaster) AddWriter

func (w *WriteBroadcaster) AddWriter(writer io.WriteCloser)

func (*WriteBroadcaster) CloseWriters

func (w *WriteBroadcaster) CloseWriters() error

func (*WriteBroadcaster) RemoveWriter

func (w *WriteBroadcaster) RemoveWriter(writer io.WriteCloser)

FIXME: Is that function used? FIXME: This relies on the concrete writer type used having equality operator

func (*WriteBroadcaster) Write

func (w *WriteBroadcaster) Write(p []byte) (n int, err error)

type WriteFlusher

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

func NewWriteFlusher

func NewWriteFlusher(w io.Writer) *WriteFlusher

func (*WriteFlusher) Write

func (wf *WriteFlusher) Write(b []byte) (n int, err error)