func (r *s3Replica) Pull(from string, target Pusher) error {
bucket, err := s3utils.NewBucket(r.uri)
if err != nil {
return err
}
err = s3utils.ForEachFile(r.uri, from, func(path string, modtime time.Time) (retErr error) {
f, err := bucket.GetReader(path)
if f == nil {
return fmt.Errorf("Nil file returned.")
}
if err != nil {
return err
}
defer func() {
if err := f.Close(); err != nil && retErr == nil {
retErr = err
}
}()
err = target.Push(f)
if err != nil {
return err
}
return nil
})
if err != nil {
return err
}
return nil
}
func (r *s3Replica) Push(diff io.Reader) error {
bucket, err := s3utils.NewBucket(r.uri)
if err != nil {
return err
}
key := fmt.Sprintf("%.10d", r.count)
r.count++
p, err := s3utils.GetPath(r.uri)
if err != nil {
return err
}
return s3utils.PutMulti(bucket, path.Join(p, key), diff, "application/octet-stream", s3.BucketOwnerFull)
}
// inject injects data from an external source into the output directory
func (p *pipeline) inject(name string) error {
switch {
case strings.HasPrefix(name, "s3://"):
bucket, err := s3utils.NewBucket(name)
if err != nil {
return err
}
var wg sync.WaitGroup
s3utils.ForEachFile(name, "", func(file string, modtime time.Time) error {
// Grab the path, it's handy later
_path, err := s3utils.GetPath(name)
if err != nil {
return err
}
if err != nil {
return err
}
// Check if the file belongs on shit shard
match, err := route.Match(file, p.shard)
if err != nil {
return err
}
if !match {
return nil
}
// Check if the file has changed
changed, err := btrfs.Changed(path.Join(p.outRepo, p.branch,
strings.TrimPrefix(file, _path)), modtime)
log.Print("Changed: ", changed)
if err != nil {
return err
}
if !changed {
return nil
}
// TODO match the on disk timestamps to s3's timestamps and make
// sure we only pull data that has changed
wg.Add(1)
go func() {
defer wg.Done()
src, err := bucket.GetReader(file)
if err != nil {
return
}
dst, err := btrfs.CreateAll(path.Join(p.outRepo, p.branch, strings.TrimPrefix(file, _path)))
if err != nil {
return
}
defer dst.Close()
_, err = io.Copy(dst, src)
if err != nil {
return
}
err = btrfs.Chtimes(path.Join(p.outRepo, p.branch, strings.TrimPrefix(file, _path)), modtime, modtime)
if err != nil {
return
}
}()
return nil
})
wg.Wait()
default:
log.Print("Unknown protocol: ", name)
return ErrUnknownProtocol
}
return nil
}