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authorEelco Dolstra <e.dolstra@tudelft.nl>2005-01-19T11·16+0000
committerEelco Dolstra <e.dolstra@tudelft.nl>2005-01-19T11·16+0000
commit863dcff6c5ffc163010ec1f9e6819bb9aaaadc29 (patch)
tree4747222c7f8c471e6cbfa07c49023853d2f6b957 /misc
parente9762e2d10c4a837e3d75d53e3a24452f07f47ec (diff)
* Started removing closure store expressions, i.e., the explicit
  representation of closures as ATerms in the Nix store.  Instead, the
  file system pointer graph is now stored in the Nix database.  This
  has many advantages:

  - It greatly simplifies the implementation (we can drop the notion
    of `successors', and so on).

  - It makes registering roots for the garbage collector much easier.
    Instead of specifying the closure expression as a root, you can
    simply specify the store path that must be retained as a root.
    This could not be done previously, since there was no way to find
    the closure store expression containing a given store path.
    
  - Better traceability: it is now possible to query what paths are
    referenced by a path, and what paths refer to a path.

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