// ScanRefs takes a ref and returns a slice of WrappedPointer objects
// for all Git LFS pointers it finds for that ref.
func ScanRefs(refLeft, refRight string) ([]*WrappedPointer, error) {
nameMap := make(map[string]string, 0)
start := time.Now()
defer func() {
tracerx.PerformanceSince("scan", start)
}()
revs, err := revListShas(refLeft, refRight, refLeft == "", nameMap)
if err != nil {
return nil, err
}
smallShas, err := catFileBatchCheck(revs)
if err != nil {
return nil, err
}
pointerc, err := catFileBatch(smallShas)
if err != nil {
return nil, err
}
pointers := make([]*WrappedPointer, 0)
for p := range pointerc {
if name, ok := nameMap[p.Sha1]; ok {
p.Name = name
}
pointers = append(pointers, p)
}
return pointers, nil
}
// ScanTree takes a ref and returns a slice of WrappedPointer objects in the tree at that ref
// Differs from ScanRefs in that multiple files in the tree with the same content are all reported
func ScanTree(ref string) ([]*WrappedPointer, error) {
start := time.Now()
defer func() {
tracerx.PerformanceSince("scan", start)
}()
// We don't use the nameMap approach here since that's imprecise when >1 file
// can be using the same content
treeShas, err := lsTreeBlobs(ref)
if err != nil {
return nil, err
}
pointerc, err := catFileBatchTree(treeShas)
if err != nil {
return nil, err
}
pointers := make([]*WrappedPointer, 0)
for p := range pointerc {
pointers = append(pointers, p)
}
return pointers, nil
}
// ScanIndex returns a slice of WrappedPointer objects for all
// Git LFS pointers it finds in the index.
// Reports unique oids once only, not multiple times if >1 file uses the same content
func ScanIndex() ([]*WrappedPointer, error) {
nameMap := make(map[string]*indexFile, 0)
start := time.Now()
defer func() {
tracerx.PerformanceSince("scan-staging", start)
}()
revs, err := revListIndex(false, nameMap)
if err != nil {
return nil, err
}
cachedRevs, err := revListIndex(true, nameMap)
if err != nil {
return nil, err
}
allRevs := make(chan string)
go func() {
seenRevs := make(map[string]bool, 0)
for rev := range revs {
seenRevs[rev] = true
allRevs <- rev
}
for rev := range cachedRevs {
if _, ok := seenRevs[rev]; !ok {
allRevs <- rev
}
}
close(allRevs)
}()
smallShas, err := catFileBatchCheck(allRevs)
if err != nil {
return nil, err
}
pointerc, err := catFileBatch(smallShas)
if err != nil {
return nil, err
}
pointers := make([]*WrappedPointer, 0)
for p := range pointerc {
if e, ok := nameMap[p.Sha1]; ok {
p.Name = e.Name
p.Status = e.Status
p.SrcName = e.SrcName
}
pointers = append(pointers, p)
}
return pointers, nil
}
// Fetch and report completion of each OID to a channel (optional, pass nil to skip)
func fetchAndReportToChan(pointers []*lfs.WrappedPointer, include, exclude []string, out chan<- *lfs.WrappedPointer) {
totalSize := int64(0)
for _, p := range pointers {
totalSize += p.Size
}
q := lfs.NewDownloadQueue(len(pointers), totalSize, false)
for _, p := range pointers {
// Only add to download queue if local file is not the right size already
// This avoids previous case of over-reporting a requirement for files we already have
// which would only be skipped by PointerSmudgeObject later
passFilter := lfs.FilenamePassesIncludeExcludeFilter(p.Name, include, exclude)
if !lfs.ObjectExistsOfSize(p.Oid, p.Size) && passFilter {
q.Add(lfs.NewDownloadable(p))
} else {
// If we already have it, or it won't be fetched
// report it to chan immediately to support pull/checkout
if out != nil {
out <- p
}
}
}
if out != nil {
dlwatch := q.Watch()
go func() {
// fetch only reports single OID, but OID *might* be referenced by multiple
// WrappedPointers if same content is at multiple paths, so map oid->slice
oidToPointers := make(map[string][]*lfs.WrappedPointer, len(pointers))
for _, pointer := range pointers {
plist := oidToPointers[pointer.Oid]
oidToPointers[pointer.Oid] = append(plist, pointer)
}
for oid := range dlwatch {
plist, ok := oidToPointers[oid]
if !ok {
continue
}
for _, p := range plist {
out <- p
}
}
close(out)
}()
}
processQueue := time.Now()
q.Wait()
tracerx.PerformanceSince("process queue", processQueue)
}
// ScanRefsToChan takes a ref and returns a channel of WrappedPointer objects
// for all Git LFS pointers it finds for that ref.
// Reports unique oids once only, not multiple times if >1 file uses the same content
func ScanRefsToChan(refLeft, refRight string, opt *ScanRefsOptions) (*PointerChannelWrapper, error) {
if opt == nil {
opt = NewScanRefsOptions()
}
if refLeft == "" {
opt.ScanMode = ScanAllMode
}
start := time.Now()
defer func() {
tracerx.PerformanceSince("scan", start)
}()
revs, err := revListShas(refLeft, refRight, opt)
if err != nil {
return nil, err
}
smallShas, err := catFileBatchCheck(revs)
if err != nil {
return nil, err
}
pointers, err := catFileBatch(smallShas)
if err != nil {
return nil, err
}
retchan := make(chan *WrappedPointer, chanBufSize)
errchan := make(chan error, 1)
go func() {
for p := range pointers.Results {
if name, ok := opt.GetName(p.Sha1); ok {
p.Name = name
}
retchan <- p
}
err := pointers.Wait()
if err != nil {
errchan <- err
}
close(retchan)
close(errchan)
}()
return NewPointerChannelWrapper(retchan, errchan), nil
}
// ScanPreviousVersions scans changes reachable from ref (commit) back to since.
// Returns pointers for *previous* versions that overlap that time. Does not
// return pointers which were still in use at ref (use ScanRef for that)
func ScanPreviousVersions(ref string, since time.Time) ([]*WrappedPointer, error) {
start := time.Now()
defer func() {
tracerx.PerformanceSince("scan", start)
}()
pointerchan, err := logPreviousSHAs(ref, since)
if err != nil {
return nil, err
}
pointers := make([]*WrappedPointer, 0, 10)
for p := range pointerchan {
pointers = append(pointers, p)
}
return pointers, nil
}
// ScanUnpushed scans history for all LFS pointers which have been added but not pushed to any remote
func ScanUnpushed() ([]*WrappedPointer, error) {
start := time.Now()
defer func() {
tracerx.PerformanceSince("scan", start)
}()
pointerchan, err := logUnpushedSHAs()
if err != nil {
return nil, err
}
pointers := make([]*WrappedPointer, 0, 10)
for p := range pointerchan {
pointers = append(pointers, p)
}
return pointers, nil
}
// ScanUnpushed scans history for all LFS pointers which have been added but not
// pushed to the named remote. remoteName can be left blank to mean 'any remote'
func ScanUnpushed(remoteName string) ([]*WrappedPointer, error) {
start := time.Now()
defer func() {
tracerx.PerformanceSince("scan", start)
}()
pointerchan, err := ScanUnpushedToChan(remoteName)
if err != nil {
return nil, err
}
pointers := make([]*WrappedPointer, 0, 10)
for p := range pointerchan.Results {
pointers = append(pointers, p)
}
err = pointerchan.Wait()
return pointers, err
}
// ScanRefsToChan takes a ref and returns a channel of WrappedPointer objects
// for all Git LFS pointers it finds for that ref.
// Reports unique oids once only, not multiple times if >1 file uses the same content
func ScanRefsToChan(refLeft, refRight string, opt *ScanRefsOptions) (<-chan *WrappedPointer, error) {
if opt == nil {
opt = &ScanRefsOptions{}
}
if refLeft == "" {
opt.ScanMode = ScanAllMode
}
opt.nameMap = make(map[string]string, 0)
start := time.Now()
defer func() {
tracerx.PerformanceSince("scan", start)
}()
revs, err := revListShas(refLeft, refRight, *opt)
if err != nil {
return nil, err
}
smallShas, err := catFileBatchCheck(revs)
if err != nil {
return nil, err
}
pointerc, err := catFileBatch(smallShas)
if err != nil {
return nil, err
}
retchan := make(chan *WrappedPointer, chanBufSize)
go func() {
for p := range pointerc {
if name, ok := opt.nameMap[p.Sha1]; ok {
p.Name = name
}
retchan <- p
}
close(retchan)
}()
return retchan, nil
}
// ScanRefs takes a ref and returns a slice of WrappedPointer objects
// for all Git LFS pointers it finds for that ref.
// Reports unique oids once only, not multiple times if >1 file uses the same content
func ScanRefs(refLeft, refRight string, opt *ScanRefsOptions) ([]*WrappedPointer, error) {
if opt == nil {
opt = &ScanRefsOptions{}
}
if refLeft == "" {
opt.ScanMode = ScanAllMode
}
opt.nameMap = make(map[string]string, 0)
start := time.Now()
defer func() {
tracerx.PerformanceSince("scan", start)
}()
revs, err := revListShas(refLeft, refRight, *opt)
if err != nil {
return nil, err
}
smallShas, err := catFileBatchCheck(revs)
if err != nil {
return nil, err
}
pointerc, err := catFileBatch(smallShas)
if err != nil {
return nil, err
}
pointers := make([]*WrappedPointer, 0)
for p := range pointerc {
if name, ok := opt.nameMap[p.Sha1]; ok {
p.Name = name
}
pointers = append(pointers, p)
}
return pointers, nil
}
func fetchCommand(cmd *cobra.Command, args []string) {
var ref string
var err error
if len(args) == 1 {
ref = args[0]
} else {
ref, err = git.CurrentRef()
if err != nil {
Panic(err, "Could not fetch")
}
}
pointers, err := lfs.ScanRefs(ref, "")
if err != nil {
Panic(err, "Could not scan for Git LFS files")
}
q := lfs.NewDownloadQueue(lfs.Config.ConcurrentTransfers(), len(pointers))
for _, p := range pointers {
q.Add(lfs.NewDownloadable(p))
}
target, err := git.ResolveRef(ref)
if err != nil {
Panic(err, "Could not resolve git ref")
}
current, err := git.CurrentRef()
if err != nil {
Panic(err, "Could not fetch the current git ref")
}
if target == current {
// We just downloaded the files for the current ref, we can copy them into
// the working directory and update the git index. We're doing this in a
// goroutine so they can be copied as they come in, for efficiency.
watch := q.Watch()
go func() {
files := make(map[string]*lfs.WrappedPointer, len(pointers))
for _, pointer := range pointers {
files[pointer.Oid] = pointer
}
// Fire up the update-index command
cmd := exec.Command("git", "update-index", "-q", "--refresh", "--stdin")
stdin, err := cmd.StdinPipe()
if err != nil {
Panic(err, "Could not update the index")
}
if err := cmd.Start(); err != nil {
Panic(err, "Could not update the index")
}
// As files come in, write them to the wd and update the index
for oid := range watch {
pointer, ok := files[oid]
if !ok {
continue
}
file, err := os.Create(pointer.Name)
if err != nil {
Panic(err, "Could not create working directory file")
}
if err := lfs.PointerSmudge(file, pointer.Pointer, pointer.Name, nil); err != nil {
Panic(err, "Could not write working directory file")
}
file.Close()
stdin.Write([]byte(pointer.Name + "\n"))
}
stdin.Close()
if err := cmd.Wait(); err != nil {
Panic(err, "Error updating the git index")
}
}()
processQueue := time.Now()
q.Process()
tracerx.PerformanceSince("process queue", processQueue)
}
}
// ScanIndex returns a slice of WrappedPointer objects for all
// Git LFS pointers it finds in the index.
// Reports unique oids once only, not multiple times if >1 file uses the same content
func ScanIndex() ([]*WrappedPointer, error) {
indexMap := &indexFileMap{
nameMap: make(map[string]*indexFile, 0),
mutex: &sync.Mutex{},
}
start := time.Now()
defer func() {
tracerx.PerformanceSince("scan-staging", start)
}()
revs, err := revListIndex(false, indexMap)
if err != nil {
return nil, err
}
cachedRevs, err := revListIndex(true, indexMap)
if err != nil {
return nil, err
}
allRevsErr := make(chan error, 5) // can be multiple errors below
allRevsChan := make(chan string, 1)
allRevs := NewStringChannelWrapper(allRevsChan, allRevsErr)
go func() {
seenRevs := make(map[string]bool, 0)
for rev := range revs.Results {
seenRevs[rev] = true
allRevsChan <- rev
}
err := revs.Wait()
if err != nil {
allRevsErr <- err
}
for rev := range cachedRevs.Results {
if _, ok := seenRevs[rev]; !ok {
allRevsChan <- rev
}
}
err = cachedRevs.Wait()
if err != nil {
allRevsErr <- err
}
close(allRevsChan)
close(allRevsErr)
}()
smallShas, err := catFileBatchCheck(allRevs)
if err != nil {
return nil, err
}
pointerc, err := catFileBatch(smallShas)
if err != nil {
return nil, err
}
pointers := make([]*WrappedPointer, 0)
for p := range pointerc.Results {
if e, ok := indexMap.Get(p.Sha1); ok {
p.Name = e.Name
p.Status = e.Status
p.SrcName = e.SrcName
}
pointers = append(pointers, p)
}
err = pointerc.Wait()
return pointers, err
}
