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* Get derivation outputs from the database instead of the .drv file,

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which requires more I/O.
This commit is contained in:
Eelco Dolstra 2010-02-22 12:44:36 +00:00
parent 103cfee056
commit c4d388add4
7 changed files with 46 additions and 8 deletions
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24
src/libstore/local-store.cc
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@ -299,6 +299,8 @@ void LocalStore::prepareStatements()
"insert or replace into DerivationOutputs (drv, id, path) values (?, ?, ?);");
stmtQueryValidDerivers.create(db,
"select v.id, v.path from DerivationOutputs d join ValidPaths v on d.drv = v.id where d.path = ?;");
stmtQueryDerivationOutputs.create(db,
"select id, path from DerivationOutputs where drv = ?;");
}
@ -623,6 +625,28 @@ PathSet LocalStore::queryValidDerivers(const Path & path)
}
PathSet LocalStore::queryDerivationOutputs(const Path & path)
{
SQLiteTxn txn(db);
SQLiteStmtUse use(stmtQueryDerivationOutputs);
stmtQueryDerivationOutputs.bind(queryPathInfo(path).id);
PathSet outputs;
int r;
while ((r = sqlite3_step(stmtQueryDerivationOutputs)) == SQLITE_ROW) {
const char * s = (const char *) sqlite3_column_text(stmtQueryDerivationOutputs, 1);
assert(s);
outputs.insert(s);
}
if (r != SQLITE_DONE)
throw SQLiteError(db, format("error getting outputs of `%1%'") % path);
return outputs;
}
void LocalStore::startSubstituter(const Path & substituter, RunningSubstituter & run)
{
if (run.pid != -1) return;