utils

package
v0.9.1-0...-2678af4 Latest Latest
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 Go to latest Published: Mar 20, 2014 License: Apache-2.0 Imports: 30 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	StdWriterPrefixLen = 8
	StdWriterFdIndex   = 0
	StdWriterSizeIndex = 4
)

Variables

View Source 
var ErrInvalidStdHeader = errors.New("Unrecognized input header")

Functions

func CheckLocalDns 

func CheckLocalDns(resolvConf []byte) bool

CheckLocalDns looks into the /etc/resolv.conf, it returns true if there is a local nameserver or if there is no nameserver.

func CompareKernelVersion 

func CompareKernelVersion(a, b *KernelVersionInfo) int

Compare two KernelVersionInfo struct. Returns -1 if a < b, 0 if a == b, 1 it a > b

func CopyDirectory 

func CopyDirectory(source, dest string) error

FIXME: this is deprecated by CopyWithTar in archive.go

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 CopyFile 

func CopyFile(src, dst string) (int64, error)

func CreatePidFile 

func CreatePidFile(pidfile string) error

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 DisplayJSONMessagesStream 

func DisplayJSONMessagesStream(in io.Reader, out io.Writer, terminalFd uintptr, isTerminal bool) error

func DockerInitPath 

func DockerInitPath(localCopy string) string

Figure out the path of our dockerinit (which may be SelfPath())

func Download 

func Download(url string) (resp *http.Response, err error)

Request a given URL and return an io.Reader

func Errorf 

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

func FollowSymlinkInScope 

func FollowSymlinkInScope(link, root string) (string, error)

FollowSymlink will follow an existing link and scope it to the root path provided.

func GenerateRandomID 

func GenerateRandomID() string

GenerateRandomID returns an unique id

func GetCallerName 

func GetCallerName(depth int) string

GetCallerName introspects the call stack and returns the name of the function `depth` levels down in the stack.

func GetLines 

func GetLines(input []byte, commentMarker []byte) [][]byte

GetLines parses input into lines and strips away comments.

func GetNameservers 

func GetNameservers(resolvConf []byte) []string

GetNameservers returns nameservers (if any) listed in /etc/resolv.conf

func GetNameserversAsCIDR 

func GetNameserversAsCIDR(resolvConf []byte) []string

GetNameserversAsCIDR returns nameservers (if any) listed in /etc/resolv.conf as CIDR blocks (e.g., "1.2.3.4/32") This function's output is intended for net.ParseCIDR

func GetReleaseVersion 

func GetReleaseVersion() string

func GetResolvConf 

func GetResolvConf() ([]byte, error)

GetResolvConf opens and read the content of /etc/resolv.conf. It returns it as byte slice.

func GetSearchDomains 

func GetSearchDomains(resolvConf []byte) []string

GetSearchDomains returns search domains (if any) listed in /etc/resolv.conf If more than one search line is encountered, only the contents of the last one is returned.

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 HumanSize 

func HumanSize(size int64) string

HumanSize returns a human-readable approximation of a size using SI standard (eg. "44kB", "17MB")

func IsGIT 

func IsGIT(str string) bool

func IsURL 

func IsURL(str string) bool

func NewBufReader 

func NewBufReader(r io.Reader) *bufReader

func NewHTTPRequestError 

func NewHTTPRequestError(msg string, res *http.Response) error

func NewReadCloserWrapper 

func NewReadCloserWrapper(r io.Reader, closer func() error) io.ReadCloser

func NopWriteCloser 

func NopWriteCloser(w io.Writer) io.WriteCloser

func ParseHost 

func ParseHost(defaultHost string, defaultUnix, addr string) (string, error)

FIXME: Change this not to receive default value as parameter

func ParseRepositoryTag 

func ParseRepositoryTag(repos string) (string, string)

Get a repos name and returns the right reposName + tag The tag can be confusing because of a port in a repository name. 

Ex: localhost.localdomain:5000/samalba/hipache:latest

func PartParser 

func PartParser(template, data string) (map[string]string, error)

func ProgressReader 

func ProgressReader(r io.ReadCloser, size int, output io.Writer, sf *StreamFormatter, newline bool, ID, action string) *progressReader

func RAMInBytes 

func RAMInBytes(size string) (bytes int64, err error)

Parses a human-readable string representing an amount of RAM in bytes, kibibytes, mebibytes or gibibytes, and returns the number of bytes, or -1 if the string is unparseable. Units are case-insensitive, and the 'b' suffix is optional.

func RandomString 

func RandomString() string

func ReadSymlinkedDirectory 

func ReadSymlinkedDirectory(path string) (string, error)

ReadSymlinkedDirectory returns the target directory of a symlink. The target of the symbolic link may not be a file.

func RemovePidFile 

func RemovePidFile(pidfile string)

func ReplaceOrAppendEnvValues 

func ReplaceOrAppendEnvValues(defaults, overrides []string) []string

ReplaceOrAppendValues returns the defaults with the overrides either replaced by env key or appended to the list

func SelfPath 

func SelfPath() string

Figure out the absolute path of our own binary (if it's still around).

func ShellQuoteArguments 

func ShellQuoteArguments(args []string) string

Take a list of strings and escape them so they will be handled right when passed as arguments to an program via a shell

func StdCopy 

func StdCopy(dstout, dsterr io.Writer, src io.Reader) (written int64, err error)

StdCopy is a modified version of io.Copy.

StdCopy will demultiplex `src`, assuming that it contains two streams, previously multiplexed together using a StdWriter instance. As it reads from `src`, StdCopy will write to `dstout` and `dsterr`.

StdCopy will read until it hits EOF on `src`. It will then return a nil error. In other words: if `err` is non nil, it indicates a real underlying error.

`written` will hold the total number of bytes written to `dstout` and `dsterr`.

func TestDirectory 

func TestDirectory(templateDir string) (dir string, err error)

TestDirectory creates a new temporary directory and returns its path. The contents of directory at path `templateDir` is copied into the new directory.

func TreeSize 

func TreeSize(dir string) (size int64, err error)

TreeSize walks a directory tree and returns its total size in bytes.

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.

func ValidateID 

func ValidateID(id string) error

Types

type CheckSum 

type CheckSum struct {
	io.Reader
	Hash hash.Hash
}

func (*CheckSum) Read 

func (cs *CheckSum) Read(buf []byte) (int, error)

func (*CheckSum) Sum 

func (cs *CheckSum) Sum() string

type Fataler 

type Fataler interface {
	Fatal(args ...interface{})
}

A common interface to access the Fatal method of both testing.B and testing.T.

type HTTPAuthDecorator 

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

func (*HTTPAuthDecorator) ChangeRequest 

func (self *HTTPAuthDecorator) ChangeRequest(req *http.Request) (*http.Request, error)

type HTTPMetaHeadersDecorator 

type HTTPMetaHeadersDecorator struct {
	Headers map[string][]string
}

func (*HTTPMetaHeadersDecorator) ChangeRequest 

func (h *HTTPMetaHeadersDecorator) ChangeRequest(req *http.Request) (newReq *http.Request, err error)

type HTTPRequestDecorator 

type HTTPRequestDecorator interface {
	// ChangeRequest() changes the request accordingly.
	// The changed request will be returned or err will be non-nil
	// if an error occur.
	ChangeRequest(req *http.Request) (newReq *http.Request, err error)
}

HTTPRequestDecorator is used to change an instance of http.Request. It could be used to add more header fields, change body, etc.

func NewHTTPAuthDecorator 

func NewHTTPAuthDecorator(login, password string) HTTPRequestDecorator

func NewHTTPUserAgentDecorator 

func NewHTTPUserAgentDecorator(versions ...VersionInfo) HTTPRequestDecorator

type HTTPRequestFactory 

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

HTTPRequestFactory creates an HTTP request and applies a list of decorators on the request.

func NewHTTPRequestFactory 

func NewHTTPRequestFactory(d ...HTTPRequestDecorator) *HTTPRequestFactory

func (*HTTPRequestFactory) AddDecorator 

func (self *HTTPRequestFactory) AddDecorator(d ...HTTPRequestDecorator)

func (*HTTPRequestFactory) NewRequest 

func (h *HTTPRequestFactory) NewRequest(method, urlStr string, body io.Reader, d ...HTTPRequestDecorator) (*http.Request, error)

NewRequest() creates a new *http.Request, applies all decorators in the HTTPRequestFactory on the request, then applies decorators provided by d on the request.

type HTTPUserAgentDecorator 

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

HTTPUserAgentDecorator appends the product/version to the user agent field of a request.

func (*HTTPUserAgentDecorator) ChangeRequest 

func (h *HTTPUserAgentDecorator) ChangeRequest(req *http.Request) (newReq *http.Request, err error)

type JSONError 

type JSONError struct {
	Code    int    `json:"code,omitempty"`
	Message string `json:"message,omitempty"`
}

func (*JSONError) Error 

func (e *JSONError) Error() string

type JSONLog 

type JSONLog struct {
	Log     string    `json:"log,omitempty"`
	Stream  string    `json:"stream,omitempty"`
	Created time.Time `json:"time"`
}

type JSONMessage 

type JSONMessage struct {
	Stream          string        `json:"stream,omitempty"`
	Status          string        `json:"status,omitempty"`
	Progress        *JSONProgress `json:"progressDetail,omitempty"`
	ProgressMessage string        `json:"progress,omitempty"` //deprecated
	ID              string        `json:"id,omitempty"`
	From            string        `json:"from,omitempty"`
	Time            int64         `json:"time,omitempty"`
	Error           *JSONError    `json:"errorDetail,omitempty"`
	ErrorMessage    string        `json:"error,omitempty"` //deprecated
}

func (*JSONMessage) Display 

func (jm *JSONMessage) Display(out io.Writer, isTerminal bool) error

type JSONProgress 

type JSONProgress struct {
	Current int   `json:"current,omitempty"`
	Total   int   `json:"total,omitempty"`
	Start   int64 `json:"start,omitempty"`
	// contains filtered or unexported fields
}

func (*JSONProgress) String 

func (p *JSONProgress) String() string

type KernelVersionInfo 

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

func GetKernelVersion 

func GetKernelVersion() (*KernelVersionInfo, error)

func ParseRelease 

func ParseRelease(release string) (*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 (*NopWriter) Write(buf []byte) (int, error)

type StatusError 

type StatusError struct {
	Status     string
	StatusCode int
}

An StatusError reports an unsuccessful exit by a command.

func (*StatusError) Error 

func (e *StatusError) Error() string

type StdType 

type StdType [StdWriterPrefixLen]byte
var (
	Stdin  StdType = StdType{0: 0}
	Stdout StdType = StdType{0: 1}
	Stderr StdType = StdType{0: 2}
)

type StdWriter 

type StdWriter struct {
	io.Writer
	// contains filtered or unexported fields
}

func NewStdWriter 

func NewStdWriter(w io.Writer, t StdType) *StdWriter

NewStdWriter instanciates a new Writer. Everything written to it will be encapsulated using a custom format, and written to the underlying `w` stream. This allows multiple write streams (e.g. stdout and stderr) to be muxed into a single connection. `t` indicates the id of the stream to encapsulate. It can be utils.Stdin, utils.Stdout, utils.Stderr.

func (*StdWriter) Write 

func (w *StdWriter) Write(buf []byte) (n int, err error)

type StderrFormater 

type StderrFormater struct {
	io.Writer
	*StreamFormatter
}

func (*StderrFormater) Write 

func (sf *StderrFormater) Write(buf []byte) (int, error)

type StdoutFormater 

type StdoutFormater struct {
	io.Writer
	*StreamFormatter
}

func (*StdoutFormater) Write 

func (sf *StdoutFormater) Write(buf []byte) (int, error)

type StreamFormatter 

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

func NewStreamFormatter 

func NewStreamFormatter(json bool) *StreamFormatter

func (*StreamFormatter) FormatError 

func (sf *StreamFormatter) FormatError(err error) []byte

func (*StreamFormatter) FormatProgress 

func (sf *StreamFormatter) FormatProgress(id, action string, progress *JSONProgress) []byte

func (*StreamFormatter) FormatStatus 

func (sf *StreamFormatter) FormatStatus(id, format string, a ...interface{}) []byte

func (*StreamFormatter) FormatStream 

func (sf *StreamFormatter) FormatStream(str string) []byte

func (*StreamFormatter) Json 

func (sf *StreamFormatter) Json() bool

func (*StreamFormatter) Used 

func (sf *StreamFormatter) Used() bool

type StreamWriter 

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

type TarSum 

type TarSum struct {
	io.Reader

	DisableCompression bool
	// contains filtered or unexported fields
}

func (*TarSum) GetSums 

func (ts *TarSum) GetSums() map[string]string

func (*TarSum) Read 

func (ts *TarSum) Read(buf []byte) (int, error)

func (*TarSum) Sum 

func (ts *TarSum) Sum(extra []byte) string

type TruncIndex 

type TruncIndex struct {
	sync.RWMutex
	// 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 VersionInfo 

type VersionInfo interface {
	Name() string
	Version() string
}

VersionInfo is used to model entities which has a version. It is basically a tupple with name and version.

type WriteBroadcaster 

type WriteBroadcaster struct {
	sync.Mutex
	// contains filtered or unexported fields
}

func NewWriteBroadcaster 

func NewWriteBroadcaster() *WriteBroadcaster

func (*WriteBroadcaster) AddWriter 

func (w *WriteBroadcaster) AddWriter(writer io.WriteCloser, stream string)

func (*WriteBroadcaster) CloseWriters 

func (w *WriteBroadcaster) CloseWriters() error

func (*WriteBroadcaster) Write 

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

type WriteFlusher 

type WriteFlusher struct {
	sync.Mutex
	// contains filtered or unexported fields
}

func NewWriteFlusher 

func NewWriteFlusher(w io.Writer) *WriteFlusher

func (*WriteFlusher) Flush 

func (wf *WriteFlusher) Flush()

Flush the stream immediately.

func (*WriteFlusher) Write 

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

Source Files

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