forked from lix-project/lix
c95b4ad290
normal form in a single transaction to ensure that if we crash, either everything is registered or nothing is. This is for recoverability: unregistered paths in the store can be deleted arbitrarily, while registered paths can only be deleted by running the garbage collector.
37 lines
1.2 KiB
C++
37 lines
1.2 KiB
C++
#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 Transaction & txn,
|
|
const FSId & id1, const FSId & id2);
|
|
|
|
|
|
#endif /* !__NORMALISE_H */
|