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package ingest
import "fmt"
// flush writes all consumed-but-unflushed bytes to destination pack file.
func (scanner *streamScanner) flush() error {
return scanner.flushConsumedPrefix()
}
// flushConsumedPrefix writes scanner.buf[:scanner.off] and compacts unread
// bytes to the start of buffer.
func (scanner *streamScanner) flushConsumedPrefix() error {
if scanner.off == 0 {
return nil
}
written := 0
for written < scanner.off {
n, err := scanner.dstFile.Write(scanner.buf[written:scanner.off])
if err != nil {
return &ErrDestinationWrite{Op: fmt.Sprintf("write pack: %v", err)}
}
if n == 0 {
return &ErrDestinationWrite{Op: "write pack: short write"}
}
written += n
}
unread := scanner.n - scanner.off
copy(scanner.buf[:unread], scanner.buf[scanner.off:scanner.n])
scanner.off = 0
scanner.n = unread
return nil
}
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