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linelog: add a Python implementation of the linelog datastructure...
linelog: add a Python implementation of the linelog datastructure This datastructure was originally developed by Jun Wu at Facebook, inspired by SCCS weaves. It's useful as a cache for blame information, but also is the magic that makes `hg absorb` easy to implement. In service of importing the code to Mercurial, I wanted to actually /understand/ it, and once I did I decided to take a run at implementing it. The help/internals/linelog.txt document is the README from Jun Wu's implementaiton. It all applies to our linelog implementation. Differential Revision: https://phab.mercurial-scm.org/D3990
Augie Fackler -
r38819:752d858a default
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/ mercurial / thirdparty / cbor
cbor2
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This library provides encoding and decoding for the Concise Binary Object Representation (CBOR) (RFC 7049) serialization format.

There exists another Python CBOR implementation (cbor) which is faster on CPython due to its C extensions. On PyPy, cbor2 and cbor are almost identical in performance. The other implementation also lacks documentation and a comprehensive test suite, does not support most standard extension tags and is known to crash (segfault) when passed a cyclic structure (say, a list containing itself).