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persistent-nodemap: properly ignore non-existent `.nd` data file...

persistent-nodemap: properly ignore non-existent `.nd` data file This code was meant to handle the case of a nodemap docket file pointing to a nodemap data file that doesn’t exist (anymore), but most likely caused an `UnboundLocalError` exception instead when `data` was used on the next line without being defined. This case is theoretically possible with a race condition between two hg processes, but is hard to reproduce or test: * Process A reads a docket file and finds a UID in it that points to a given data file name. * Process B decides that this same data file needs compacting. It writes a new one with a different UID, overwrites the docket file, then removes the old data file. * Only then process A tries to a open a file that doesn’t exist anymore. Differential Revision: https://phab.mercurial-scm.org/D9533

Gregory Szorc - - Load All Authors

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      from typing import (

          AnyStr,

          IO,

          List,

          Sequence,

      )

      version: int

      class stat:

          st_dev: int

          st_mode: int

          st_nlink: int

          st_size: int

          st_mtime: int

          st_ctime: int

      def listdir(path: bytes, st: bool, skip: bool) -> List[stat]: ...

      def posixfile(name: AnyStr, mode: bytes, buffering: int) -> IO: ...

      def statfiles(names: Sequence[bytes]) -> List[stat]: ...

      def recvfds(sockfd: int) -> List[int]: ...

      def setprocname(name: bytes) -> None: ...

      def getfstype(path: bytes) -> bytes: ...

      def getfsmountpoint(path: bytes) -> bytes: ...

      def unblocksignal(sig: int) -> None: ...

      def isgui() -> bool: ...

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				from typing import (
				AnyStr,
				IO,
				List,
				Sequence,
				)

				version: int

				class stat:
				st_dev: int
				st_mode: int
				st_nlink: int
				st_size: int
				st_mtime: int
				st_ctime: int

				def listdir(path: bytes, st: bool, skip: bool) -> List[stat]: ...
				def posixfile(name: AnyStr, mode: bytes, buffering: int) -> IO: ...
				def statfiles(names: Sequence[bytes]) -> List[stat]: ...
				def recvfds(sockfd: int) -> List[int]: ...
				def setprocname(name: bytes) -> None: ...
				def getfstype(path: bytes) -> bytes: ...
				def getfsmountpoint(path: bytes) -> bytes: ...
				def unblocksignal(sig: int) -> None: ...
				def isgui() -> bool: ...