From e0f4e587c3a5110f57fbf4e85e14fdc606b1eaf6 Mon Sep 17 00:00:00 2001 From: Eelco Dolstra Date: Wed, 19 Jan 2005 16:59:56 +0000 Subject: * Nix-store queries `--references' and `referers' to query the pointer graph. That is, `nix-store --query --references PATH' shows the set of paths referenced by PATH, and `nix-store --query --referers PATH' shows the set of paths referencing PATH. --- src/libstore/store.cc | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'src/libstore/store.cc') diff --git a/src/libstore/store.cc b/src/libstore/store.cc index 49a9d27342..631984784f 100644 --- a/src/libstore/store.cc +++ b/src/libstore/store.cc @@ -272,6 +272,16 @@ void queryReferences(const Path & storePath, PathSet & references) } +void queryReferers(const Path & storePath, PathSet & referers) +{ + Paths referers2; + if (!isValidPath(storePath)) + throw Error(format("path `%1%' is not valid") % storePath); + nixDB.queryStrings(noTxn, dbReferers, storePath, referers2); + referers.insert(referers2.begin(), referers2.end()); +} + + static Substitutes readSubstitutes(const Transaction & txn, const Path & srcPath) { -- cgit 1.4.1