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sparse: reliably avoid writing to store without a lock...
sparse: reliably avoid writing to store without a lock With the code as written before this patch we can still end up writing to store in `debugsparse`. Obviously we'll write to it if by accident a store requirement is modified, but more importantly we write to it if another concurrent transaction modifies the requirements file on disk. We can't rule this out since we're not holding the store lock, so it's better to explicitly pass a permission to write instead of inferring it based on file contents.
Martin von Zweigbergk - - Load All Authors

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Address commentary in manifest.excludedmanifestrevlog.add - specifically we should improve the collaboration with core so that add() never gets called on an excluded directory and we can improve the stand-in to raise a ProgrammingError.

Reason more completely about rename-filtering logic in narrowfilelog. There could be some surprises lurking there.

Formally document the narrowspec format. For bonus points, unify with the server-specified narrowspec format.

narrowrepo.setnarrowpats() or narrowspec.save() need to make sure they're holding the wlock.

The follinwg places do an unrestricted dirstate walk (including files outside the narrowspec). Some of them should perhaps not do that.

  • debugfileset
  • perfwalk
  • sparse (but restricted to sparse config)
  • largefiles