src/client/pfs.go
func (c *putFileClient) PutFileWriter(repoName, commitID, path string) (io.WriteCloser, error) {
	return c.newPutFileWriteCloser(repoName, commitID, path, pfs.Delimiter_NONE, 0, 0, 0, nil)
}
func (c *putFileClient) PutFileWriter(repoName, commitID, path string) (io.WriteCloser, error) {
	return c.newPutFileWriteCloser(repoName, commitID, path, pfs.Delimiter_NONE, 0, 0, 0, nil)
}
// PutFileWriter writes a file to PFS.
// NOTE: PutFileWriter returns an io.WriteCloser you must call Close on it when
// you are done writing.