diff options
Diffstat (limited to 'src/libstore/gc.hh')
| -rw-r--r-- | src/libstore/gc.hh | 27 |
1 files changed, 9 insertions, 18 deletions
diff --git a/src/libstore/gc.hh b/src/libstore/gc.hh index d1ca5c63e4d0..2ea851abc041 100644 --- a/src/libstore/gc.hh +++ b/src/libstore/gc.hh @@ -3,24 +3,15 @@ #include "util.hh" +/* Garbage collector operation. */ +typedef enum { gcReturnLive, gcReturnDead, gcDeleteDead } GCAction; -/* Determine the set of "live" store paths, given a set of root store - expressions. The live store paths are those that are reachable - from the roots. The roots are reachable by definition. Any path - mentioned in a reachable store expression is also reachable. If a - derivation store expression is reachable, then its successor (if it - exists) if also reachable. It is not an error for store - expressions not to exist (since this can happen on derivation store - expressions, for instance, due to the substitute mechanism), but - successor links are followed even for non-existant derivations. */ -PathSet findLivePaths(const Paths & roots); - -/* Given a set of "live" store paths, determine the set of "dead" - store paths (which are simply all store paths that are not in the - live set). The value `minAge' specifies the minimum age in seconds - for an unreachable file to be considered dead (0 meaning that any - unreachable file is dead). */ -PathSet findDeadPaths(const PathSet & live, time_t minAge); - +/* If `action' is set to `soReturnLive', return the set of paths + reachable from (i.e. in the closure of) the specified roots. If + `action' is `soReturnDead', return the set of paths not reachable + from the roots. If `action' is `soDeleteDead', actually delete the + latter set. */ +void collectGarbage(const PathSet & roots, GCAction action, + PathSet & result); #endif /* !__GC_H */ |