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authorEelco Dolstra <e.dolstra@tudelft.nl>2006-10-19T16·09+0000
committerEelco Dolstra <e.dolstra@tudelft.nl>2006-10-19T16·09+0000
commit6a67556f7192108d612560992e97a14b0fe16a22 (patch)
tree2ca8124849c212d018f8fc6865b3bec696260717 /src/libstore/pathlocks.hh
parentdaa8f85fcd3d5d7c48a51305818e05bee866b936 (diff)
* Special derivation attribute `allowedReferences' that causes Nix to
  check that the references of the output of a derivation are in the
  specified set.  For instance,

    allowedReferences = [];

  specifies that the output cannot have any references.  (This is
  useful, for instance, for the generation of bootstrap binaries for
  stdenv-linux, which must not have any references for purity).  It
  could also be used to guard against undesired runtime dependencies,
  e.g.,

    {gcc, dynlib}: derivation {
      ...
      allowedReferences = [dynlib];
    }

  says that the output can refer to the path of `dynlib' but not
  `gcc'.  A `forbiddedReferences' attribute would be more useful for
  this, though.

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