diff options
Diffstat (limited to 'src/nix.cc')
| -rw-r--r-- | src/nix.cc | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/src/nix.cc b/src/nix.cc index 9907f5c74da6..9bbbf4ae8c85 100644 --- a/src/nix.cc +++ b/src/nix.cc @@ -73,7 +73,7 @@ Path maybeNormalise(const Path & ne, bool normalise) /* Perform various sorts of queries. */ static void opQuery(Strings opFlags, Strings opArgs) { - enum { qList, qRequisites, qGenerators, qGraph + enum { qList, qRequisites, qGenerators, qPredecessors, qGraph } query = qList; bool normalise = false; bool includeExprs = true; @@ -84,6 +84,7 @@ static void opQuery(Strings opFlags, Strings opArgs) if (*i == "--list" || *i == "-l") query = qList; else if (*i == "--requisites" || *i == "-r") query = qRequisites; else if (*i == "--generators" || *i == "-g") query = qGenerators; + else if (*i == "--predecessors") query = qPredecessors; else if (*i == "--graph") query = qGraph; else if (*i == "--normalise" || *i == "-n") normalise = true; else if (*i == "--exclude-exprs") includeExprs = false; @@ -139,6 +140,18 @@ static void opQuery(Strings opFlags, Strings opArgs) } #endif + case qPredecessors: { + for (Strings::iterator i = opArgs.begin(); + i != opArgs.end(); i++) + { + Paths preds = queryPredecessors(checkPath(*i)); + for (Paths::iterator j = preds.begin(); + j != preds.end(); j++) + cout << format("%s\n") % *j; + } + break; + } + case qGraph: { PathSet roots; for (Strings::iterator i = opArgs.begin(); |