From 5f1891b795c4c4daac5336d1ec60c94f521ede1d Mon Sep 17 00:00:00 2001 From: Spencer Baugh Date: Wed, 12 Dec 2018 14:19:54 -0500 Subject: nix-store: make --dump-db take a list of paths to dump Inside a derivation, exportReferencesGraph already provides a way to dump the Nix database for a specific closure. On the command line, --dump-db gave us the same information, but only for the entire Nix database at once. With this change, one can now pass a list of paths to --dump-db to get the Nix database dumped for just those paths. (The user is responsible for ensuring this is a closure, like for --export). Among other things, this is useful for deploying a closure to a new host without using --import/--export; one can use tar to transfer the store paths, and --dump-db/--load-db to transfer the validity information. This is useful if the new host doesn't actually have Nix yet, and the closure that is being deployed itself contains Nix. --- src/nix-store/nix-store.cc | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) (limited to 'src') diff --git a/src/nix-store/nix-store.cc b/src/nix-store/nix-store.cc index a9ad14762..33138baff 100644 --- a/src/nix-store/nix-store.cc +++ b/src/nix-store/nix-store.cc @@ -485,11 +485,16 @@ static void opReadLog(Strings opFlags, Strings opArgs) static void opDumpDB(Strings opFlags, Strings opArgs) { if (!opFlags.empty()) throw UsageError("unknown flag"); - if (!opArgs.empty()) - throw UsageError("no arguments expected"); - PathSet validPaths = store->queryAllValidPaths(); - for (auto & i : validPaths) - cout << store->makeValidityRegistration({i}, true, true); + if (!opArgs.empty()) { + for (auto & i : opArgs) + i = store->followLinksToStorePath(i); + for (auto & i : opArgs) + cout << store->makeValidityRegistration({i}, true, true); + } else { + PathSet validPaths = store->queryAllValidPaths(); + for (auto & i : validPaths) + cout << store->makeValidityRegistration({i}, true, true); + } } -- cgit v1.2.3