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#pragma once
#include "derivations.hh"
namespace nix {
/* Read a derivation, after ensuring its existence through
ensurePath(). */
Derivation derivationFromPath(StoreAPI & store, const Path & drvPath);
/* Place in `paths' the set of all store paths in the file system
closure of `storePath'; that is, all paths than can be directly or
indirectly reached from it. `paths' is not cleared. If
`flipDirection' is true, the set of paths that can reach
`storePath' is returned; that is, the closures under the
`referrers' relation instead of the `references' relation is
returned. */
void computeFSClosure(StoreAPI & store, const Path & path,
PathSet & paths, bool flipDirection = false,
bool includeOutputs = false, bool includeDerivers = false);
/* Return the path corresponding to the output identifier `id' in the
given derivation. */
Path findOutput(const Derivation & drv, string id);
bool willBuildLocally(const Derivation & drv);
bool substitutesAllowed(const Derivation & drv);
}
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