tq

package
v2.3.4+incompatible Latest Latest
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 Go to latest Published: Oct 18, 2017 License: MIT Imports: 24 Imported by: 0

Documentation

Overview

Package transfer collects together adapters for uploading and downloading LFS content NOTE: Subject to change, do not rely on this package from outside git-lfs source

Index

Constants

View Source 
const (
	Upload   = Direction(iota)
	Download = Direction(iota)
)
View Source 
const (
	TusAdapterName = "tus"
	TusVersion     = "1.0.0"
)
View Source 
const (
	BasicAdapterName = "basic"
)

Variables

This section is empty.

Functions

func IsActionExpiredError 

func IsActionExpiredError(err error) bool

func NewCustomAdapterDownloadRequest 

func NewCustomAdapterDownloadRequest(oid string, size int64, action *Action) *customAdapterTransferRequest

func NewCustomAdapterInitRequest 

func NewCustomAdapterInitRequest(
	op string, remote string, concurrent bool, concurrentTransfers int,
) *customAdapterInitRequest

func NewCustomAdapterTerminateRequest 

func NewCustomAdapterTerminateRequest() *customAdapterTerminateRequest

func NewCustomAdapterUploadRequest 

func NewCustomAdapterUploadRequest(oid string, size int64, path string, action *Action) *customAdapterTransferRequest

Types

type Action 

type Action struct {
	Href      string            `json:"href"`
	Header    map[string]string `json:"header,omitempty"`
	ExpiresAt time.Time         `json:"expires_at,omitempty"`
	ExpiresIn int               `json:"expires_in,omitempty"`
	// contains filtered or unexported fields
}

func (*Action) IsExpiredWithin 

func (a *Action) IsExpiredWithin(d time.Duration) (time.Time, bool)

type ActionExpiredErr 

type ActionExpiredErr struct {
	Rel string
	At  time.Time
}

func (ActionExpiredErr) Error 

func (e ActionExpiredErr) Error() string

type ActionSet 

type ActionSet map[string]*Action

func (ActionSet) Get 

func (as ActionSet) Get(rel string) (*Action, error)

type Adapter 

type Adapter interface {
	// Name returns the name of this adapter, which is the same for all instances
	// of this type of adapter
	Name() string
	// Direction returns whether this instance is an upload or download instance
	// Adapter instances can only be one or the other, although the same
	// type may be instantiated for each direction
	Direction() Direction
	// Begin a new batch of uploads or downloads. Call this first, followed by
	// one or more Add calls. maxConcurrency controls the number of transfers
	// that may be done at once. The passed in callback will receive updates on
	// progress. Either argument may be nil if not required by the client.
	Begin(cfg AdapterConfig, cb ProgressCallback) error
	// Add queues a download/upload, which will complete asynchronously and
	// notify the callbacks given to Begin()
	Add(transfers ...*Transfer) (results <-chan TransferResult)
	// Indicate that all transfers have been scheduled and resources can be released
	// once the queued items have completed.
	// This call blocks until all items have been processed
	End()
	// ClearTempStorage clears any temporary files, such as unfinished downloads that
	// would otherwise be resumed
	ClearTempStorage() error
}

Adapter is implemented by types which can upload and/or download LFS file content to a remote store. Each Adapter accepts one or more requests which it may schedule and parallelise in whatever way it chooses, clients of this interface will receive notifications of progress and completion asynchronously. TransferAdapters support transfers in one direction; if an implementation provides support for upload and download, it should be instantiated twice, advertising support for each direction separately. Note that Adapter only implements the actual upload/download of content itself; organising the wider process including calling the API to get URLs, handling progress reporting and retries is the job of the core TransferQueue. This is so that the orchestration remains core & standard but Adapter can be changed to physically transfer to different hosts with less code.

type AdapterConfig 

type AdapterConfig interface {
	APIClient() *lfsapi.Client
	ConcurrentTransfers() int
	Remote() string
}

type BatchResponse 

type BatchResponse struct {
	Objects             []*Transfer `json:"objects"`
	TransferAdapterName string      `json:"transfer"`
	// contains filtered or unexported fields
}

func Batch 

func Batch(m *Manifest, dir Direction, remote string, objects []*Transfer) (*BatchResponse, error)

type Direction 

type Direction int

func (Direction) String 

func (d Direction) String() string

type Env 

type Env interface {
	Get(key string) (val string, ok bool)
	GetAll(key string) []string
	Bool(key string, def bool) (val bool)
	Int(key string, def int) (val int)
	All() map[string][]string
}

Env is any object with a config.Environment interface.

type MalformedObjectError 

type MalformedObjectError struct {
	Name string
	Oid  string
	// contains filtered or unexported fields
}

func (MalformedObjectError) Corrupt 

func (e MalformedObjectError) Corrupt() bool

func (MalformedObjectError) Error 

func (e MalformedObjectError) Error() string

func (MalformedObjectError) Missing 

func (e MalformedObjectError) Missing() bool

type Manifest 

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

func NewManifest 

func NewManifest() *Manifest

func NewManifestClientOperationRemote 

func NewManifestClientOperationRemote(
	apiClient *lfsapi.Client, operation, remote string,
) *Manifest

func NewManifestWithClient 

func NewManifestWithClient(apiClient *lfsapi.Client) *Manifest

func (*Manifest) APIClient 

func (m *Manifest) APIClient() *lfsapi.Client

func (*Manifest) ConcurrentTransfers 

func (m *Manifest) ConcurrentTransfers() int

func (*Manifest) GetAdapterNames 

func (m *Manifest) GetAdapterNames(dir Direction) []string

GetAdapterNames returns a list of the names of adapters available to be created

func (*Manifest) GetDownloadAdapterNames 

func (m *Manifest) GetDownloadAdapterNames() []string

GetDownloadAdapterNames returns a list of the names of download adapters available to be created

func (*Manifest) GetUploadAdapterNames 

func (m *Manifest) GetUploadAdapterNames() []string

GetUploadAdapterNames returns a list of the names of upload adapters available to be created

func (*Manifest) IsStandaloneTransfer 

func (m *Manifest) IsStandaloneTransfer() bool

func (*Manifest) MaxRetries 

func (m *Manifest) MaxRetries() int

func (*Manifest) NewAdapter 

func (m *Manifest) NewAdapter(name string, dir Direction) Adapter

Create a new adapter by name and direction, or nil if doesn't exist

func (*Manifest) NewAdapterOrDefault 

func (m *Manifest) NewAdapterOrDefault(name string, dir Direction) Adapter

Create a new adapter by name and direction; default to BasicAdapterName if doesn't exist

func (*Manifest) NewDownloadAdapter 

func (m *Manifest) NewDownloadAdapter(name string) Adapter

Create a new download adapter by name, or BasicAdapterName if doesn't exist

func (*Manifest) NewUploadAdapter 

func (m *Manifest) NewUploadAdapter(name string) Adapter

Create a new upload adapter by name, or BasicAdapterName if doesn't exist

func (*Manifest) RegisterNewAdapterFunc 

func (m *Manifest) RegisterNewAdapterFunc(name string, dir Direction, f NewAdapterFunc)

RegisterNewTransferAdapterFunc registers a new function for creating upload or download adapters. If a function with that name & direction is already registered, it is overridden

type NewAdapterFunc 

type NewAdapterFunc func(name string, dir Direction) Adapter

NewAdapterFunc creates new instances of Adapter. Code that wishes to provide new Adapter instances should pass an implementation of this function to RegisterNewTransferAdapterFunc() on a *Manifest. name and dir are to provide context if one func implements many instances

type ObjectError 

type ObjectError struct {
	Code    int    `json:"code"`
	Message string `json:"message"`
}

func (*ObjectError) Error 

func (e *ObjectError) Error() string

type Option 

type Option func(*TransferQueue)

func DryRun 

func DryRun(dryRun bool) Option

func WithBatchSize 

func WithBatchSize(size int) Option

func WithBufferDepth 

func WithBufferDepth(depth int) Option

func WithProgress 

func WithProgress(m progress.Meter) Option

func WithProgressCallback 

func WithProgressCallback(cb progress.CopyCallback) Option

type ProgressCallback 

type ProgressCallback func(name string, totalSize, readSoFar int64, readSinceLast int) error

type Transfer 

type Transfer struct {
	Name          string       `json:"name,omitempty"`
	Oid           string       `json:"oid,omitempty"`
	Size          int64        `json:"size"`
	Authenticated bool         `json:"authenticated,omitempty"`
	Actions       ActionSet    `json:"actions,omitempty"`
	Links         ActionSet    `json:"_links,omitempty"`
	Error         *ObjectError `json:"error,omitempty"`
	Path          string       `json:"path,omitempty"`
}

func (*Transfer) Rel 

func (t *Transfer) Rel(name string) (*Action, error)

type TransferQueue 

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

TransferQueue organises the wider process of uploading and downloading, including calling the API, passing the actual transfer request to transfer adapters, and dealing with progress, errors and retries.

func NewTransferQueue 

func NewTransferQueue(dir Direction, manifest *Manifest, remote string, options ...Option) *TransferQueue

NewTransferQueue builds a TransferQueue, direction and underlying mechanism determined by adapter

func (*TransferQueue) Add 

func (q *TransferQueue) Add(name, path, oid string, size int64)

Add adds a *Transfer to the transfer queue. It only increments the amount of waiting the TransferQueue has to do if the *Transfer "t" is new.

If another transfer(s) with the same OID has been added to the *TransferQueue already, the given transfer will not be enqueued, but will be sent to any channel created by Watch() once the oldest transfer has completed.

Only one file will be transferred to/from the Path element of the first transfer.

func (*TransferQueue) BatchSize 

func (q *TransferQueue) BatchSize() int

BatchSize returns the batch size of the receiving *TransferQueue, or, the number of transfers to accept before beginning work on them.

func (*TransferQueue) Errors 

func (q *TransferQueue) Errors() []error

Errors returns any errors encountered during transfer.

func (*TransferQueue) Skip 

func (q *TransferQueue) Skip(size int64)

func (*TransferQueue) Wait 

func (q *TransferQueue) Wait()

Wait waits for the queue to finish processing all transfers. Once Wait is called, Add will no longer add transfers to the queue. Any failed transfers will be automatically retried once.

func (*TransferQueue) Watch 

func (q *TransferQueue) Watch() chan *Transfer

Watch returns a channel where the queue will write the value of each transfer as it completes. If multiple transfers exist with the same OID, they will all be recorded here, even though only one actual transfer took place. The channel will be closed when the queue finishes processing.

type TransferResult 

type TransferResult struct {
	Transfer *Transfer
	// This will be non-nil if there was an error transferring this item
	Error error
}

Result of a transfer returned through CompletionChannel()

Source Files

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