0cacca1bbc
This refactoring will make a number of things easier. These didn't really need to be in their own packages. Having them separate packages, there are a few refactorings I've tried to do that end up with circular dependencies due to things outside of `lfs` depending on `lfs`. Pushing these into `lfs` makes refactoring simpler.
88 lines
1.9 KiB
Go
88 lines
1.9 KiB
Go
package lfs
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import (
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"fmt"
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"github.com/cheggaaa/pb"
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"github.com/technoweenie/go-contentaddressable"
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"io"
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"os"
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"path/filepath"
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)
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func PointerSmudge(writer io.Writer, ptr *Pointer, workingfile string, cb CopyCallback) error {
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mediafile, err := LocalMediaPath(ptr.Oid)
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if err != nil {
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return err
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}
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var wErr *WrappedError
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if stat, statErr := os.Stat(mediafile); statErr != nil || stat == nil {
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wErr = downloadFile(writer, ptr, workingfile, mediafile, cb)
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} else {
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wErr = readLocalFile(writer, ptr, mediafile, cb)
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}
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if wErr != nil {
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return &SmudgeError{ptr.Oid, mediafile, wErr}
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} else {
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return nil
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}
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}
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func downloadFile(writer io.Writer, ptr *Pointer, workingfile, mediafile string, cb CopyCallback) *WrappedError {
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fmt.Fprintf(os.Stderr, "Downloading %s (%s)\n", workingfile, pb.FormatBytes(ptr.Size))
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reader, size, wErr := Download(filepath.Base(mediafile))
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if reader != nil {
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defer reader.Close()
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}
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if wErr != nil {
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wErr.Errorf("Error downloading %s.", mediafile)
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return wErr
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}
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if ptr.Size == 0 {
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ptr.Size = size
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}
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mediaFile, err := contentaddressable.NewFile(mediafile)
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if err != nil {
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return Errorf(err, "Error opening media file buffer.")
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}
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_, err = CopyWithCallback(mediaFile, reader, ptr.Size, cb)
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if err == nil {
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err = mediaFile.Accept()
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}
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mediaFile.Close()
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if err != nil {
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return Errorf(err, "Error buffering media file.")
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}
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return readLocalFile(writer, ptr, mediafile, nil)
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}
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func readLocalFile(writer io.Writer, ptr *Pointer, mediafile string, cb CopyCallback) *WrappedError {
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reader, err := os.Open(mediafile)
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if err != nil {
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return Errorf(err, "Error opening media file.")
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}
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defer reader.Close()
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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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_, err = CopyWithCallback(writer, reader, ptr.Size, cb)
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return Errorf(err, "Error reading from media file.")
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}
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type SmudgeError struct {
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Oid string
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Filename string
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*WrappedError
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}
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