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Fix querying outputs for CA derivations some more

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If we resolve using the known path of a derivation whose output we
didn't have, we previously blew up. Now we just fail gracefully,
returning the map of all outputs unknown.
This commit is contained in:
John Ericson 2020-09-04 18:33:58 +00:00
parent 075d399e3f
commit 98dfd7531d
3 changed files with 21 additions and 7 deletions
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4
src/libstore/derivations.cc
View File

@ -69,7 +69,7 @@ bool BasicDerivation::isBuiltin() const
StorePath writeDerivation(Store & store,
const Derivation & drv, RepairFlag repair)
const Derivation & drv, RepairFlag repair, bool readOnly)
{
auto references = drv.inputSrcs;
for (auto & i : drv.inputDrvs)
@ -79,7 +79,7 @@ StorePath writeDerivation(Store & store,
held during a garbage collection). */
auto suffix = std::string(drv.name) + drvExtension;
auto contents = drv.unparse(store, false);
return settings.readOnlyMode
return readOnly || settings.readOnlyMode
? store.computeStorePathForText(suffix, contents, references)
: store.addTextToStore(suffix, contents, references, repair);
}

4
src/libstore/derivations.hh
View File

@ -146,7 +146,9 @@ enum RepairFlag : bool { NoRepair = false, Repair = true };
/* Write a derivation to the Nix store, and return its path. */
StorePath writeDerivation(Store & store,
const Derivation & drv, RepairFlag repair = NoRepair);
const Derivation & drv,
RepairFlag repair = NoRepair,
bool readOnly = false);
/* Read a derivation from a file. */
Derivation parseDerivation(const Store & store, std::string && s, std::string_view name);

20
src/libstore/local-store.cc
View File

@ -728,7 +728,7 @@ uint64_t LocalStore::queryValidPathId(State & state, const StorePath & path)
{
auto use(state.stmtQueryPathInfo.use()(printStorePath(path)));
if (!use.next())
throw Error("path '%s' is not valid", printStorePath(path));
throw InvalidPath("path '%s' is not valid", printStorePath(path));
return use.getInt(0);
}
@ -831,7 +831,8 @@ std::map<std::string, std::optional<StorePath>> LocalStore::queryPartialDerivati
/* If we cannot resolve the derivation, we cannot have any path
assigned so we return the map of all std::nullopts. */
return outputs;
auto pathResolved = writeDerivation(*this, *std::move(attempt));
/* Just compute store path */
auto pathResolved = writeDerivation(*this, *std::move(attempt), NoRepair, true);
/* Store in memo table. */
/* FIXME: memo logic should not be local-store specific, should have
wrapper-method instead. */
@ -841,8 +842,19 @@ std::map<std::string, std::optional<StorePath>> LocalStore::queryPartialDerivati
return retrySQLite<std::map<std::string, std::optional<StorePath>>>([&]() {
auto state(_state.lock());
auto useQueryDerivationOutputs(state->stmtQueryDerivationOutputs.use()
(queryValidPathId(*state, path)));
uint64_t drvId;
try {
drvId = queryValidPathId(*state, path);
} catch (InvalidPath &) {
/* FIXME? if the derivation doesn't exist, we cannot have a mapping
for it. */
return outputs;
}
auto useQueryDerivationOutputs {
state->stmtQueryDerivationOutputs.use()
(drvId)
};
while (useQueryDerivationOutputs.next())
outputs.insert_or_assign(