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Add a function queryValidPaths()

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queryValidPaths() combines multiple calls to isValidPath() in one.
This matters when using the Nix daemon because it reduces latency.
For instance, on "nix-env -qas \*" it reduces execution time from 5.7s
to 4.7s (which is indistinguishable from the non-daemon case).
This commit is contained in:
Eelco Dolstra 2012-07-11 11:08:47 -04:00
parent 667d5f1936
commit 58ef4d9a95
8 changed files with 49 additions and 3 deletions
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17
src/libstore/remote-store.cc
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@ -217,6 +217,23 @@ bool RemoteStore::isValidPath(const Path & path)
}
PathSet RemoteStore::queryValidPaths(const PathSet & paths)
{
if (GET_PROTOCOL_MINOR(daemonVersion) < 12) {
PathSet res;
foreach (PathSet::const_iterator, i, paths)
if (isValidPath(*i)) res.insert(*i);
return res;
} else {
openConnection();
writeInt(wopQueryValidPaths, to);
writeStrings(paths, to);
processStderr();
return readStorePaths<PathSet>(from);
}
}
PathSet RemoteStore::queryAllValidPaths()
{
openConnection();