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cg4: introduce protocol flag to signify the presence of sidedata...

cg4: introduce protocol flag to signify the presence of sidedata We need a way of signaling whether the current revision has sidedata or not, and re-using the revision flags would waste potential revlog flags and mix two normally independent layers. In this change, we add a single byte at the start of the ch4 delta header to set potential protocol flags. We also reclaim the revlog flag for sidedata, since it is no longer used, in its place now lives the (also experimental) copytracing flag. When generating deltas, apply the `CG_FLAG_SIDEDATA` flag if there is sidedata. When applying the deltas, if said flag is present, the next chunk contains the sidedata. Differential Revision: https://phab.mercurial-scm.org/D10343

Gregory Szorc - - Load All Authors

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        Gregory Szorc
    
cext: add .pyi files for C extensions...

              r46652
            
      from typing import (

          List,

      )

      version: int

      class mpatchError(Exception): ...

      def patches(text: bytes, bins: List[bytes]) -> bytes: ...

      def patchedsize(orig: int, data: bytes) -> int: ...

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Gregory Szorc cext: add .pyi files for C extensions...	r46652	from typing import (
		List,
		)

		version: int

		class mpatchError(Exception): ...

		def patches(text: bytes, bins: List[bytes]) -> bytes: ...
		def patchedsize(orig: int, data: bytes) -> int: ...