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Diffstat (limited to 'src/nix-env/nix-env.cc')
| -rw-r--r-- | src/nix-env/nix-env.cc | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/nix-env/nix-env.cc b/src/nix-env/nix-env.cc index f60ff9e07182..a43b103f6ec6 100644 --- a/src/nix-env/nix-env.cc +++ b/src/nix-env/nix-env.cc @@ -1284,6 +1284,14 @@ static void opDeleteGenerations(Globals & globals, Strings opFlags, Strings opAr deleteOldGenerations(globals.profile, globals.dryRun); } else if (opArgs.size() == 1 && opArgs.front().find('d') != string::npos) { deleteGenerationsOlderThan(globals.profile, opArgs.front(), globals.dryRun); + } else if (opArgs.size() == 1 && opArgs.front().find('+') != string::npos) { + if(opArgs.front().size() < 2) + throw Error(format("invalid number of generations ‘%1%’") % opArgs.front()); + string str_max = string(opArgs.front(), 1, opArgs.front().size()); + int max; + if (!string2Int(str_max, max) || max == 0) + throw Error(format("invalid number of generations to keep ‘%1%’") % opArgs.front()); + deleteGenerationsGreaterThan(globals.profile, max, globals.dryRun); } else { std::set<unsigned int> gens; for (auto & i : opArgs) { |