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nix-store --export: Export paths in topologically sorted order

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Fixes #118.
This commit is contained in:
Eelco Dolstra 2013-05-23 14:55:36 -04:00
parent 107505e13a
commit b09b87321c
2 changed files with 4 additions and 2 deletions
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2
src/libstore/store-api.hh
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@ -328,7 +328,7 @@ Path addPermRoot(StoreAPI & store, const Path & storePath,
/* Sort a set of paths topologically under the references relation.
If p refers to q, then p follows q in this list. */
If p refers to q, then p preceeds q in this list. */
Paths topoSortPaths(StoreAPI & store, const PathSet & paths);

4
src/nix-store/nix-store.cc
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@ -694,7 +694,9 @@ static void opExport(Strings opFlags, Strings opArgs)
else throw UsageError(format("unknown flag `%1%'") % *i);
FdSink sink(STDOUT_FILENO);
exportPaths(*store, opArgs, sign, sink);
Paths sorted = topoSortPaths(*store, PathSet(opArgs.begin(), opArgs.end()));
reverse(sorted.begin(), sorted.end());
exportPaths(*store, sorted, sign, sink);
}