Function diffIDComputationGoroutine

copy/single.go:968–977

diffIDComputationGoroutine reads all input from layerStream, uncompresses using decompressor if necessary, and sends its digest, and status, if any, to dest.

(dest chan<- diffIDResult, layerStream io.ReadCloser, decompressor compressiontypes.DecompressorFunc)

// diffIDComputationGoroutine reads all input from layerStream, uncompresses using decompressor if necessary, and sends its digest, and status, if any, to dest.
func diffIDComputationGoroutine(dest chan<- diffIDResult, layerStream io.ReadCloser, decompressor compressiontypes.DecompressorFunc) {
	result := diffIDResult{
		digest: "",
		err:    errors.New("Internal error: unexpected panic in diffIDComputationGoroutine"),
	}
	defer func() { dest <- result }()
	defer layerStream.Close() // We do not care to bother the other end of the pipe with other failures; we send them to dest instead.

	result.digest, result.err = computeDiffID(layerStream, decompressor)
}

// computeDiffID reads all input from layerStream, uncompresses it using decompressor if necessary, and returns its digest.
func computeDiffID(stream io.Reader, decompressor compressiontypes.DecompressorFunc) (digest.Digest, error) {