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* `nix-store -qR' and friends: print the paths sorted topologically

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under the references relation.  This is useful for commands that
  want to copy paths to another Nix store in the right order.
This commit is contained in:
Eelco Dolstra 2007-02-21 22:45:10 +00:00
parent 881feb9698
commit 9da367b7d5
3 changed files with 12 additions and 40 deletions
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4
src/libstore/gc.cc
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@ -417,7 +417,7 @@ static void dfsVisit(const PathSet & paths, const Path & path,
}
static Paths topoSort(const PathSet & paths)
Paths topoSortPaths(const PathSet & paths)
{
Paths sorted;
PathSet visited;
@ -550,7 +550,7 @@ void LocalStore::collectGarbage(GCAction action, const PathSet & pathsToDelete,
which things can be deleted safely. */
/* !!! when we have multiple output paths per derivation, this
will not work anymore because we get cycles. */
Paths storePaths = topoSort(storePathSet);
Paths storePaths = topoSortPaths(storePathSet);
/* Try to delete store paths in the topologically sorted order. */
for (Paths::iterator i = storePaths.begin(); i != storePaths.end(); ++i) {