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* Maintain a database table (`derivers') that maps output paths to the

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derivation that produced them.
* `nix-store -qd PATH' prints out the derivation that produced a path.
This commit is contained in:
Eelco Dolstra 2005-02-07 13:40:40 +00:00
parent a37338815d
commit 450c358e20
4 changed files with 74 additions and 13 deletions
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17
src/nix-store/main.cc
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@ -162,7 +162,7 @@ static void printPathSet(const PathSet & paths)
static void opQuery(Strings opFlags, Strings opArgs)
{
enum { qOutputs, qRequisites, qReferences, qReferers,
qReferersClosure, qGraph } query = qOutputs;
qReferersClosure, qDeriver, qGraph } query = qOutputs;
bool useOutput = false;
bool includeOutputs = false;
bool forceRealise = false;
@ -174,6 +174,7 @@ static void opQuery(Strings opFlags, Strings opArgs)
else if (*i == "--references") query = qReferences;
else if (*i == "--referers") query = qReferers;
else if (*i == "--referers-closure") query = qReferersClosure;
else if (*i == "--deriver" || *i == "-d") query = qDeriver;
else if (*i == "--graph") query = qGraph;
else if (*i == "--use-output" || *i == "-u") useOutput = true;
else if (*i == "--force-realise" || *i == "-f") forceRealise = true;
@ -214,6 +215,18 @@ static void opQuery(Strings opFlags, Strings opArgs)
break;
}
case qDeriver:
for (Strings::iterator i = opArgs.begin();
i != opArgs.end(); i++)
{
*i = followSymlinks(*i);
Path deriver = queryDeriver(noTxn, *i);
cout << format("%1%\n") %
(deriver == "" ? "unknown-deriver" : deriver);
}
break;
#if 0
case qGraph: {
PathSet roots;
@ -288,7 +301,7 @@ static void opValidPath(Strings opFlags, Strings opArgs)
createStoreTransaction(txn);
for (Strings::iterator i = opArgs.begin();
i != opArgs.end(); ++i)
registerValidPath(txn, *i, hashPath(htSHA256, *i), PathSet());
registerValidPath(txn, *i, hashPath(htSHA256, *i), PathSet(), "");
txn.commit();
}