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Re:Show HN: BitKeeper – Enterprise-ready version control, no... by luckydude on Tuesday May 10, 2016 @03:24PM (#11669857)
We did a clean room reimplementation of SCCS and added a pile of extensions.
Re:Show HN: BitKeeper – Enterprise-ready version control, no... by chris_wot on Tuesday May 10, 2016 @07:13PM (#11671419)
So basically when Tridge "reverse engineered" BK, he basically reimplemented SCCS?

https://lwn.net/Articles/132938/

Re:Show HN: BitKeeper – Enterprise-ready version control, no... by luckydude on Tuesday May 10, 2016 @11:36PM (#11672488)
nope, he did a clone and pull. He did rsync or tar but had no awareness of the file format.