040000 tree c85684942e2678af51abc7c1a87e2180b49699f6	libhdfs
040000 tree 24102d524329a3a338205d582c05737bd4af5a52	librecordio
040000 tree 899d08441651a6708887568558ee11cd14244982	pipes
040000 tree c0cc63c353a3b27857496eca1a109bfecbcc61da	utils