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Also display suggestions for the commands using the eval cache

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Make `nix build .#nix-armv8l-linux` work for example
This commit is contained in:
regnat 2022-03-04 09:44:00 +01:00
parent 2405bbbb5e
commit 98e361ad4c
4 changed files with 103 additions and 17 deletions
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19
src/libcmd/installables.cc
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@ -272,9 +272,9 @@ void completeFlakeRefWithFragment(
auto attr = root->findAlongAttrPath(attrPath);
if (!attr) continue;
for (auto & attr2 : attr->getAttrs()) {
for (auto & attr2 : (*attr)->getAttrs()) {
if (hasPrefix(attr2, lastAttr)) {
auto attrPath2 = attr->getAttrPath(attr2);
auto attrPath2 = (*attr)->getAttrPath(attr2);
/* Strip the attrpath prefix. */
attrPath2.erase(attrPath2.begin(), attrPath2.begin() + attrPathPrefix.size());
completions->add(flakeRefS + "#" + concatStringsSep(".", attrPath2));
@ -568,15 +568,22 @@ std::tuple<std::string, FlakeRef, InstallableValue::DerivationInfo> InstallableF
auto cache = openEvalCache(*state, lockedFlake);
auto root = cache->getRoot();
Suggestions suggestions;
for (auto & attrPath : getActualAttrPaths()) {
debug("trying flake output attribute '%s'", attrPath);
auto attr = root->findAlongAttrPath(
auto attrOrSuggestions = root->findAlongAttrPath(
parseAttrPath(*state, attrPath),
true
);
if (!attr) continue;
if (!attrOrSuggestions) {
suggestions += attrOrSuggestions.getSuggestions();
continue;
}
auto attr = *attrOrSuggestions;
if (!attr->isDerivation())
throw Error("flake output attribute '%s' is not a derivation", attrPath);
@ -591,7 +598,7 @@ std::tuple<std::string, FlakeRef, InstallableValue::DerivationInfo> InstallableF
return {attrPath, lockedFlake->flake.lockedRef, std::move(drvInfo)};
}
throw Error("flake '%s' does not provide attribute %s",
throw Error(suggestions, "flake '%s' does not provide attribute %s",
flakeRef, showAttrPaths(getActualAttrPaths()));
}
@ -642,7 +649,7 @@ InstallableFlake::getCursors(EvalState & state)
for (auto & attrPath : getActualAttrPaths()) {
auto attr = root->findAlongAttrPath(parseAttrPath(state, attrPath));
if (attr) res.push_back({attr, attrPath});
if (attr) res.push_back({*attr, attrPath});
}
return res;