nixos/nix
1
1
Fork 0
mirror of https://github.com/NixOS/nix.git synced 2025-12-07 09:31:01 +01:00
Code Activity

* Get rid of identifiers since they are redundant now. This greatly

Browse source 
simplifies stuff.

* The format of Nix expressions and the database schema changed
  because of this, so it's best to delete old Nix installations.
This commit is contained in:
Eelco Dolstra 2003-10-08 15:06:59 +00:00
parent b9f4942bd2
commit 6baa2c4420
23 changed files with 485 additions and 631 deletions
Download patch file Download diff file Expand all files Collapse all files

29
src/normalise.hh
View file

@ -4,15 +4,22 @@
#include "expr.hh"
/* Normalise a Nix expression, that is, return an equivalent
closure. (For the meaning of `pending', see expandId()). */
FSId normaliseNixExpr(FSId id, FSIdSet pending = FSIdSet());
/* Normalise a Nix expression. That is, if the expression is a
derivation, a path containing an equivalent closure expression is
returned. This requires that the derivation is performed, unless a
successor is known. */
Path normaliseNixExpr(const Path & nePath, PathSet pending = PathSet());
/* Realise a Closure in the file system. */
void realiseClosure(const FSId & id, FSIdSet pending = FSIdSet());
/* Realise a closure expression in the file system.
The pending paths are those that are already being realised. This
prevents infinite recursion for paths realised through a substitute
(since when we build the substitute, we would first try to realise
its output paths through substitutes... kaboom!). */
void realiseClosure(const Path & nePath, PathSet pending = PathSet());
/* Get the list of root (output) paths of the given Nix expression. */
Strings nixExprPaths(const FSId & id);
PathSet nixExprRoots(const Path & nePath);
/* Get the list of paths that are required to realise the given
expression. For a derive expression, this is the union of
@ -20,16 +27,16 @@ Strings nixExprPaths(const FSId & id);
each element in the closure. If `includeExprs' is true, include the
paths of the Nix expressions themselves. If `includeSuccessors' is
true, include the requisites of successors. */
Strings nixExprRequisites(const FSId & id,
PathSet nixExprRequisites(const Path & nePath,
bool includeExprs, bool includeSuccessors);
/* Return the list of the ids of all known Nix expressions whose
output ids are completely contained in `ids'. */
FSIds findGenerators(const FSIds & ids);
/* Return the list of the paths of all known Nix expressions whose
output paths are completely contained in the set `outputs'. */
PathSet findGenerators(const PathSet & outputs);
/* Register a successor. */
void registerSuccessor(const Transaction & txn,
const FSId & id1, const FSId & id2);
const Path & path1, const Path & path2);
#endif /* !__NORMALISE_H */