2014-07-28 19:26:10 +00:00
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package pointer
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2013-10-04 15:22:32 +00:00
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import (
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2015-03-19 19:30:55 +00:00
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"github.com/github/git-lfs/lfs"
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2014-08-18 16:43:16 +00:00
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"github.com/technoweenie/go-contentaddressable"
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2013-10-04 15:22:32 +00:00
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"io"
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2013-11-05 15:26:58 +00:00
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"os"
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2013-10-04 15:22:32 +00:00
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)
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2015-03-19 19:30:55 +00:00
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func Smudge(writer io.Writer, ptr *Pointer, cb lfs.CopyCallback) error {
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mediafile, err := lfs.LocalMediaPath(ptr.Oid)
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2014-06-05 19:05:02 +00:00
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if err != nil {
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return err
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}
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2013-10-04 15:22:32 +00:00
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2015-03-19 19:30:55 +00:00
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var wErr *lfs.WrappedError
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2014-07-28 23:11:39 +00:00
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if stat, statErr := os.Stat(mediafile); statErr != nil || stat == nil {
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2014-08-08 16:51:47 +00:00
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wErr = downloadFile(writer, ptr, mediafile, cb)
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2013-11-06 16:41:57 +00:00
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} else {
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2014-08-08 16:51:47 +00:00
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wErr = readLocalFile(writer, ptr, mediafile, cb)
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2013-11-05 15:26:58 +00:00
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}
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2014-08-08 16:51:47 +00:00
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if wErr != nil {
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return &SmudgeError{ptr.Oid, mediafile, wErr}
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2014-07-28 19:35:25 +00:00
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} else {
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return nil
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}
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}
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2015-03-19 19:30:55 +00:00
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func downloadFile(writer io.Writer, ptr *Pointer, mediafile string, cb lfs.CopyCallback) *lfs.WrappedError {
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reader, size, wErr := lfs.Download(mediafile)
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2014-08-08 17:31:33 +00:00
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if reader != nil {
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defer reader.Close()
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}
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2014-08-07 22:04:04 +00:00
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if wErr != nil {
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2014-08-08 16:51:47 +00:00
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wErr.Errorf("Error downloading %s.", mediafile)
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2014-08-07 22:04:04 +00:00
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return wErr
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2014-07-28 19:35:25 +00:00
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}
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2014-08-07 16:25:26 +00:00
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if ptr.Size == 0 {
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ptr.Size = size
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}
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2014-08-18 16:43:16 +00:00
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mediaFile, err := contentaddressable.NewFile(mediafile)
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2014-07-28 19:35:25 +00:00
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if err != nil {
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2015-03-19 19:30:55 +00:00
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return lfs.Errorf(err, "Error opening media file buffer.")
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2014-07-28 19:35:25 +00:00
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}
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2015-03-19 19:30:55 +00:00
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_, err = lfs.CopyWithCallback(mediaFile, reader, ptr.Size, cb)
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2014-08-19 17:24:42 +00:00
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if err == nil {
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2014-08-18 16:43:16 +00:00
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err = mediaFile.Accept()
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}
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2014-08-21 20:36:39 +00:00
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mediaFile.Close()
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2014-07-28 20:31:30 +00:00
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2014-08-18 16:43:16 +00:00
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if err != nil {
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2015-03-19 19:30:55 +00:00
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return lfs.Errorf(err, "Error buffering media file.")
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2014-07-28 20:31:30 +00:00
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}
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2014-08-18 16:43:16 +00:00
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return readLocalFile(writer, ptr, mediafile, nil)
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2014-07-28 19:35:25 +00:00
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}
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2015-03-19 19:30:55 +00:00
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func readLocalFile(writer io.Writer, ptr *Pointer, mediafile string, cb lfs.CopyCallback) *lfs.WrappedError {
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2014-07-28 19:35:25 +00:00
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reader, err := os.Open(mediafile)
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if err != nil {
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2015-03-19 19:30:55 +00:00
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return lfs.Errorf(err, "Error opening media file.")
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2014-07-28 19:35:25 +00:00
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}
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defer reader.Close()
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2014-08-07 16:25:26 +00:00
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if ptr.Size == 0 {
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if stat, _ := os.Stat(mediafile); stat != nil {
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ptr.Size = stat.Size()
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}
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}
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2015-03-19 19:30:55 +00:00
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_, err = lfs.CopyWithCallback(writer, reader, ptr.Size, cb)
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return lfs.Errorf(err, "Error reading from media file.")
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2013-10-04 15:22:32 +00:00
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}
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2013-10-22 18:09:06 +00:00
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type SmudgeError struct {
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2014-08-08 16:51:47 +00:00
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Oid string
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Filename string
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2015-03-19 19:30:55 +00:00
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*lfs.WrappedError
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2013-10-22 18:09:06 +00:00
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}
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