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#ifndef __NORMALISE_H
#define __NORMALISE_H
#include "fstate.hh"
/* Normalise an fstate-expression, that is, return an equivalent
slice. (For the meaning of `pending', see expandId()). */
FSId normaliseFState(FSId id, FSIdSet pending = FSIdSet());
/* Realise a Slice in the file system. */
void realiseSlice(const FSId & id, FSIdSet pending = FSIdSet());
/* Get the list of root (output) paths of the given
fstate-expression. */
Strings fstatePaths(const FSId & id);
/* Get the list of paths that are required to realise the given
expression. For a derive expression, this is the union of
requisites of the inputs; for a slice expression, it is the path of
each element in the slice. If `includeExprs' is true, include the
paths of the Nix expressions themselves. If `includeSuccessors' is
true, include the requisites of successors. */
Strings fstateRequisites(const FSId & id,
bool includeExprs, bool includeSuccessors);
/* Return the list of the ids of all known fstate-expressions whose
output ids are completely contained in `ids'. */
FSIds findGenerators(const FSIds & ids);
/* Register a successor. */
void registerSuccessor(const FSId & id1, const FSId & id2);
#endif /* !__NORMALISE_H */
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