tar archive assembly/disassembly


Pristinely disassembling a tar archive, and stashing needed raw bytes and offsets to reassemble a validating original archive.

Eventually this should detect TARs that this is not possible with.

For example stored sparse files that have "holes" in them, will be read as a contiguous file, though the archive contents may be recorded in sparse format. Therefore when adding the file payload to a reassembled tar, to achieve identical output, the file payload would need be precisely re-sparsified. This is not something I seek to fix immediately, but would rather have an alert that precise reassembly is not possible. (see more http://www.gnu.org/software/tar/manual/html_node/Sparse-Formats.html)

Other caveat, while tar archives support having multiple file entries for the same path, we will not support this feature. If there are more than one entries with the same path, expect an err (like ErrDuplicatePath) or a resulting tar stream that does not validate your original checksum/signature.

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Install tar-split