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EvalCache: Revert to using symbols in getAttr()

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This commit is contained in:
Eelco Dolstra 2022-04-26 14:01:21 +02:00
parent fab731a9d4
commit 474695975d
6 changed files with 37 additions and 21 deletions
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2
src/libcmd/installables.cc
View file

@ -600,7 +600,7 @@ std::tuple<std::string, FlakeRef, InstallableValue::DerivationInfo> InstallableF
auto drvInfo = DerivationInfo {
std::move(drvPath),
attr->getAttr("outputName")->getString()
attr->getAttr(state->sOutputName)->getString()
};
return {attrPath, getLockedFlake()->flake.lockedRef, std::move(drvInfo)};

38
src/libexpr/eval-cache.cc
View file

@ -420,8 +420,10 @@ Suggestions AttrCursor::getSuggestionsForAttr(Symbol name)
return Suggestions::bestMatches(strAttrNames, root->state.symbols[name]);
}
std::shared_ptr<AttrCursor> AttrCursor::maybeGetAttr(std::string_view name, bool forceErrors)
std::shared_ptr<AttrCursor> AttrCursor::maybeGetAttr(Symbol name, bool forceErrors)
{
auto nameS = root->state.symbols[name];
if (root->db) {
if (!cachedValue)
cachedValue = root->db->getAttr(getKey(), root->state.symbols);
@ -429,11 +431,11 @@ std::shared_ptr<AttrCursor> AttrCursor::maybeGetAttr(std::string_view name, bool
if (cachedValue) {
if (auto attrs = std::get_if<std::vector<Symbol>>(&cachedValue->second)) {
for (auto & attr : *attrs)
if (root->state.symbols[attr] == name)
if (attr == name)
return std::make_shared<AttrCursor>(root, std::make_pair(shared_from_this(), attr));
return nullptr;
} else if (std::get_if<placeholder_t>(&cachedValue->second)) {
auto attr = root->db->getAttr({cachedValue->first, std::string(name)}, root->state.symbols);
auto attr = root->db->getAttr({cachedValue->first, nameS}, root->state.symbols);
if (attr) {
if (std::get_if<missing_t>(&attr->second))
return nullptr;
@ -441,10 +443,10 @@ std::shared_ptr<AttrCursor> AttrCursor::maybeGetAttr(std::string_view name, bool
if (forceErrors)
debug("reevaluating failed cached attribute '%s'");
else
throw CachedEvalError("cached failure of attribute '%s'", getAttrPathStr(root->state.symbols.create(name)));
throw CachedEvalError("cached failure of attribute '%s'", getAttrPathStr(name));
} else
return std::make_shared<AttrCursor>(root,
std::make_pair(shared_from_this(), root->state.symbols.create(name)), nullptr, std::move(attr));
std::make_pair(shared_from_this(), name), nullptr, std::move(attr));
}
// Incomplete attrset, so need to fall thru and
// evaluate to see whether 'name' exists
@ -465,13 +467,13 @@ std::shared_ptr<AttrCursor> AttrCursor::maybeGetAttr(std::string_view name, bool
root->db->setPlaceholder({cachedValue->first, root->state.symbols[attr.name]});
}
auto attr = v.attrs->get(root->state.symbols.create(name));
auto attr = v.attrs->get(name);
if (!attr) {
if (root->db) {
if (!cachedValue)
cachedValue = {root->db->setPlaceholder(getKey()), placeholder_t()};
root->db->setMissing({cachedValue->first, std::string(name)});
root->db->setMissing({cachedValue->first, nameS});
}
return nullptr;
}
@ -480,26 +482,36 @@ std::shared_ptr<AttrCursor> AttrCursor::maybeGetAttr(std::string_view name, bool
if (root->db) {
if (!cachedValue)
cachedValue = {root->db->setPlaceholder(getKey()), placeholder_t()};
cachedValue2 = {root->db->setPlaceholder({cachedValue->first, std::string(name)}), placeholder_t()};
cachedValue2 = {root->db->setPlaceholder({cachedValue->first, nameS}), placeholder_t()};
}
return make_ref<AttrCursor>(
root, std::make_pair(shared_from_this(), root->state.symbols.create(name)), attr->value, std::move(cachedValue2));
root, std::make_pair(shared_from_this(), name), attr->value, std::move(cachedValue2));
}
ref<AttrCursor> AttrCursor::getAttr(std::string_view name, bool forceErrors)
std::shared_ptr<AttrCursor> AttrCursor::maybeGetAttr(std::string_view name)
{
return maybeGetAttr(root->state.symbols.create(name));
}
ref<AttrCursor> AttrCursor::getAttr(Symbol name, bool forceErrors)
{
auto p = maybeGetAttr(name, forceErrors);
if (!p)
throw Error("attribute '%s' does not exist", getAttrPathStr(root->state.symbols.create(name)));
throw Error("attribute '%s' does not exist", getAttrPathStr(name));
return ref(p);
}
ref<AttrCursor> AttrCursor::getAttr(std::string_view name)
{
return getAttr(root->state.symbols.create(name));
}
OrSuggestions<ref<AttrCursor>> AttrCursor::findAlongAttrPath(const std::vector<Symbol> & attrPath, bool force)
{
auto res = shared_from_this();
for (auto & attr : attrPath) {
auto child = res->maybeGetAttr(root->state.symbols[attr], force);
auto child = res->maybeGetAttr(attr, force);
if (!child) {
auto suggestions = res->getSuggestionsForAttr(attr);
return OrSuggestions<ref<AttrCursor>>::failed(suggestions);
@ -627,7 +639,7 @@ bool AttrCursor::isDerivation()
StorePath AttrCursor::forceDerivation()
{
auto aDrvPath = getAttr("drvPath", true);
auto aDrvPath = getAttr(root->state.sDrvPath, true);
auto drvPath = root->state.store->parseStorePath(aDrvPath->getString());
if (!root->state.store->isValidPath(drvPath) && !settings.readOnlyMode) {
/* The eval cache contains 'drvPath', but the actual path has

8
src/libexpr/eval-cache.hh
View file

@ -96,9 +96,13 @@ public:
Suggestions getSuggestionsForAttr(Symbol name);
std::shared_ptr<AttrCursor> maybeGetAttr(std::string_view name, bool forceErrors = false);
std::shared_ptr<AttrCursor> maybeGetAttr(Symbol name, bool forceErrors = false);
ref<AttrCursor> getAttr(std::string_view name, bool forceErrors = false);
std::shared_ptr<AttrCursor> maybeGetAttr(std::string_view name);
ref<AttrCursor> getAttr(Symbol name, bool forceErrors = false);
ref<AttrCursor> getAttr(std::string_view name);
/* Get an attribute along a chain of attrsets. Note that this does
not auto-call functors or functions. */

6
src/nix/app.cc
View file

@ -85,9 +85,9 @@ UnresolvedApp Installable::toApp(EvalState & state)
else if (type == "derivation") {
auto drvPath = cursor->forceDerivation();
auto outPath = cursor->getAttr("outPath")->getString();
auto outputName = cursor->getAttr("outputName")->getString();
auto name = cursor->getAttr("name")->getString();
auto outPath = cursor->getAttr(state.sOutPath)->getString();
auto outputName = cursor->getAttr(state.sOutputName)->getString();
auto name = cursor->getAttr(state.sName)->getString();
auto aPname = cursor->maybeGetAttr("pname");
auto aMeta = cursor->maybeGetAttr("meta");
auto aMainProgram = aMeta ? aMeta->maybeGetAttr("mainProgram") : nullptr;

2
src/nix/flake.cc
View file

@ -1012,7 +1012,7 @@ struct CmdFlakeShow : FlakeCommand, MixJSON
auto showDerivation = [&]()
{
auto name = visitor.getAttr("name")->getString();
auto name = visitor.getAttr(state->sName)->getString();
if (json) {
std::optional<std::string> description;
if (auto aMeta = visitor.maybeGetAttr("meta")) {

2
src/nix/search.cc
View file

@ -156,7 +156,7 @@ struct CmdSearch : InstallableCommand, MixJSON
recurse();
else if (attrPathS[0] == "legacyPackages" && attrPath.size() > 2) {
auto attr = cursor.maybeGetAttr("recurseForDerivations");
auto attr = cursor.maybeGetAttr(state->sRecurseForDerivations);
if (attr && attr->getBool())
recurse();
}