nix/libstore/misc.hh

   1 #pragma once
   2
   3 #include "derivations.hh"
   4
   5
   6 namespace nix {
   7
   8
   9 /* Read a derivation, after ensuring its existence through
  10    ensurePath(). */
  11 Derivation derivationFromPath(StoreAPI & store, const Path & drvPath);
  12
  13 /* Place in `paths' the set of all store paths in the file system
  14    closure of `storePath'; that is, all paths than can be directly or
  15    indirectly reached from it.  `paths' is not cleared.  If
  16    `flipDirection' is true, the set of paths that can reach
  17    `storePath' is returned; that is, the closures under the
  18    `referrers' relation instead of the `references' relation is
  19    returned. */
  20 void computeFSClosure(StoreAPI & store, const Path & path,
  21     PathSet & paths, bool flipDirection = false,
  22     bool includeOutputs = false, bool includeDerivers = false);
  23
  24 /* Return the path corresponding to the output identifier `id' in the
  25    given derivation. */
  26 Path findOutput(const Derivation & drv, string id);
  27
  28 bool willBuildLocally(const Derivation & drv);
  29
  30 bool substitutesAllowed(const Derivation & drv);
  31
  32
  33 }