187 lines
4.7 KiB
Go
187 lines
4.7 KiB
Go
package tq
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import (
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"sync"
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"github.com/git-lfs/git-lfs/lfsapi"
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"github.com/rubyist/tracerx"
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)
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const (
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defaultMaxRetries = 1
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defaultConcurrentTransfers = 3
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)
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type Manifest struct {
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// MaxRetries is the maximum number of retries a single object can
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// attempt to make before it will be dropped.
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maxRetries int
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concurrentTransfers int
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basicTransfersOnly bool
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tusTransfersAllowed bool
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downloadAdapterFuncs map[string]NewAdapterFunc
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uploadAdapterFuncs map[string]NewAdapterFunc
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apiClient *lfsapi.Client
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mu sync.Mutex
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}
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func (m *Manifest) APIClient() *lfsapi.Client {
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return m.apiClient
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}
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func (m *Manifest) MaxRetries() int {
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return m.maxRetries
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}
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func (m *Manifest) ConcurrentTransfers() int {
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return m.concurrentTransfers
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}
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func NewManifest() *Manifest {
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cli, err := lfsapi.NewClient(nil, nil)
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if err != nil {
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tracerx.Printf("unable to init tq.Manifest: %s", err)
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return nil
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}
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return NewManifestWithClient(cli)
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}
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func NewManifestWithClient(apiClient *lfsapi.Client) *Manifest {
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m := &Manifest{
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apiClient: apiClient,
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downloadAdapterFuncs: make(map[string]NewAdapterFunc),
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uploadAdapterFuncs: make(map[string]NewAdapterFunc),
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}
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var tusAllowed bool
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if git := apiClient.GitEnv(); git != nil {
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if v := git.Int("lfs.transfer.maxretries", 0); v > 0 {
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m.maxRetries = v
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}
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if v := git.Int("lfs.concurrenttransfers", 0); v > 0 {
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m.concurrentTransfers = v
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}
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m.basicTransfersOnly = git.Bool("lfs.basictransfersonly", false)
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tusAllowed = git.Bool("lfs.tustransfers", false)
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configureCustomAdapters(git, m)
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}
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if m.maxRetries < 1 {
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m.maxRetries = defaultMaxRetries
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}
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if m.concurrentTransfers < 1 {
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m.concurrentTransfers = defaultConcurrentTransfers
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}
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configureBasicDownloadAdapter(m)
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configureBasicUploadAdapter(m)
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if tusAllowed {
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configureTusAdapter(m)
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}
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return m
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}
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// GetAdapterNames returns a list of the names of adapters available to be created
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func (m *Manifest) GetAdapterNames(dir Direction) []string {
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switch dir {
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case Upload:
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return m.GetUploadAdapterNames()
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case Download:
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return m.GetDownloadAdapterNames()
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}
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return nil
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}
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// GetDownloadAdapterNames returns a list of the names of download adapters available to be created
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func (m *Manifest) GetDownloadAdapterNames() []string {
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return m.getAdapterNames(m.downloadAdapterFuncs)
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}
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// GetUploadAdapterNames returns a list of the names of upload adapters available to be created
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func (m *Manifest) GetUploadAdapterNames() []string {
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return m.getAdapterNames(m.uploadAdapterFuncs)
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}
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// getAdapterNames returns a list of the names of adapters available to be created
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func (m *Manifest) getAdapterNames(adapters map[string]NewAdapterFunc) []string {
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if m.basicTransfersOnly {
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return []string{BasicAdapterName}
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}
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m.mu.Lock()
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defer m.mu.Unlock()
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ret := make([]string, 0, len(adapters))
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for n, _ := range adapters {
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ret = append(ret, n)
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}
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return ret
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}
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// RegisterNewTransferAdapterFunc registers a new function for creating upload
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// or download adapters. If a function with that name & direction is already
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// registered, it is overridden
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func (m *Manifest) RegisterNewAdapterFunc(name string, dir Direction, f NewAdapterFunc) {
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m.mu.Lock()
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defer m.mu.Unlock()
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switch dir {
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case Upload:
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m.uploadAdapterFuncs[name] = f
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case Download:
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m.downloadAdapterFuncs[name] = f
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}
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}
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// Create a new adapter by name and direction; default to BasicAdapterName if doesn't exist
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func (m *Manifest) NewAdapterOrDefault(name string, dir Direction) Adapter {
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if len(name) == 0 {
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name = BasicAdapterName
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}
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a := m.NewAdapter(name, dir)
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if a == nil {
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tracerx.Printf("Defaulting to basic transfer adapter since %q did not exist", name)
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a = m.NewAdapter(BasicAdapterName, dir)
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}
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return a
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}
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// Create a new adapter by name and direction, or nil if doesn't exist
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func (m *Manifest) NewAdapter(name string, dir Direction) Adapter {
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m.mu.Lock()
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defer m.mu.Unlock()
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switch dir {
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case Upload:
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if u, ok := m.uploadAdapterFuncs[name]; ok {
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return u(name, dir)
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}
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case Download:
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if d, ok := m.downloadAdapterFuncs[name]; ok {
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return d(name, dir)
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}
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}
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return nil
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}
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// Create a new download adapter by name, or BasicAdapterName if doesn't exist
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func (m *Manifest) NewDownloadAdapter(name string) Adapter {
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return m.NewAdapterOrDefault(name, Download)
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}
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// Create a new upload adapter by name, or BasicAdapterName if doesn't exist
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func (m *Manifest) NewUploadAdapter(name string) Adapter {
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return m.NewAdapterOrDefault(name, Upload)
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}
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// Env is any object with a config.Environment interface.
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type Env interface {
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Get(key string) (val string, ok bool)
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Bool(key string, def bool) (val bool)
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Int(key string, def int) (val int)
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All() map[string]string
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}
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