func (transfer *Transfer) move(srcStore fs.BlockStore) os.Error {
if err := mkParentDirs(transfer.To); err != nil {
return err
}
return fs.Move(transfer.From.Resolve(), transfer.To.Resolve())
}
func (rwt *ReplaceWithTemp) Exec(srcStore fs.BlockStore) (err os.Error) {
tempName := rwt.Temp.tempFh.Name()
rwt.Temp.localFh.Close()
rwt.Temp.localFh = nil
rwt.Temp.tempFh.Close()
rwt.Temp.tempFh = nil
err = os.Remove(rwt.Temp.Path.Resolve())
if err != nil {
return err
}
err = fs.Move(tempName, rwt.Temp.Path.Resolve())
if err != nil {
return err
}
return nil
}
func PatchFile(src string, dst string) error {
match, err := Match(src, dst)
if match == nil {
return err
}
var buf [fs.BLOCKSIZE]byte
_, dstname := filepath.Split(dst)
newdstF, err := ioutil.TempFile("", dstname)
if newdstF == nil {
return err
}
defer newdstF.Close()
dstF, err := os.Open(dst)
if dstF == nil {
return err
}
defer dstF.Close()
// Write blocks from dst that we already have
DST_2_NEWDST:
for _, blockMatch := range match.BlockMatches {
dstF.Seek(blockMatch.DstOffset, 0)
newdstF.Seek(blockMatch.DstOffset, 0)
switch rd, err := dstF.Read(buf[:]); true {
case rd < 0:
return err
case rd == 0:
break DST_2_NEWDST
case rd > 0:
newdstF.Write(buf[:rd])
}
}
srcF, err := os.Open(src)
if srcF == nil {
return err
}
defer srcF.Close()
// Fill in the rest from src
SRC_2_NEWDST:
for _, notMatch := range match.NotMatched() {
srcF.Seek(notMatch.From, 0)
newdstF.Seek(notMatch.From, 0)
for toRd := notMatch.Size(); toRd > 0; {
var rd int
switch rd, err := srcF.Read(buf[:]); true {
case rd < 0:
return err
case rd == 0:
break SRC_2_NEWDST
case rd > 0:
newdstF.Write(buf[:rd])
}
toRd -= int64(rd)
}
}
newdst := newdstF.Name()
newdstF.Close()
dstF.Close()
os.Remove(dst)
err = fs.Move(newdst, dst)
return err
}
