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Catch eval errors in hasContent

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`legacyPackages` of nixpkgs trigger eval errors in `hasContent`, causing
the whole `legacyPackages` being skipped. We should treat it as
has-content in that case.
This commit is contained in:
oxalica 2023-03-26 22:39:24 +08:00
parent e00abd3f56
commit 2941a599fa
2 changed files with 51 additions and 24 deletions
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55
src/nix/flake.cc
View file

@ -1026,36 +1026,43 @@ struct CmdFlakeShow : FlakeCommand, MixJSON
auto visitor2 = visitor.getAttr(attrName); auto visitor2 = visitor.getAttr(attrName);
if ((attrPathS[0] == "apps" try {
|| attrPathS[0] == "checks" if ((attrPathS[0] == "apps"
|| attrPathS[0] == "devShells" || attrPathS[0] == "checks"
|| attrPathS[0] == "legacyPackages" || attrPathS[0] == "devShells"
|| attrPathS[0] == "packages") || attrPathS[0] == "legacyPackages"
&& (attrPathS.size() == 1 || attrPathS.size() == 2)) { || attrPathS[0] == "packages")
for (const auto &subAttr : visitor2->getAttrs()) { && (attrPathS.size() == 1 || attrPathS.size() == 2)) {
if (hasContent(*visitor2, attrPath2, subAttr)) { for (const auto &subAttr : visitor2->getAttrs()) {
return true; if (hasContent(*visitor2, attrPath2, subAttr)) {
return true;
}
} }
return false;
} }
return false;
}
if ((attrPathS.size() == 1) if ((attrPathS.size() == 1)
&& (attrPathS[0] == "formatter" && (attrPathS[0] == "formatter"
|| attrPathS[0] == "nixosConfigurations" || attrPathS[0] == "nixosConfigurations"
|| attrPathS[0] == "nixosModules" || attrPathS[0] == "nixosModules"
|| attrPathS[0] == "overlays" || attrPathS[0] == "overlays"
)) { )) {
for (const auto &subAttr : visitor2->getAttrs()) { for (const auto &subAttr : visitor2->getAttrs()) {
if (hasContent(*visitor2, attrPath2, subAttr)) { if (hasContent(*visitor2, attrPath2, subAttr)) {
return true; return true;
}
} }
return false;
} }
return false;
}
// If we don't recognize it, it's probably content // If we don't recognize it, it's probably content
return true; return true;
} catch (EvalError & e) {
// Some attrs may contain errors, eg. legacyPackages of
// nixpkgs. We still want to recurse into it, instead of
// skipping it at all.
return true;
}
}; };
std::function<nlohmann::json( std::function<nlohmann::json(

20
tests/flakes/show.sh
View file

@ -64,3 +64,23 @@ in
assert show_output == { }; assert show_output == { };
true true
' '
# Test that legacyPackages with errors are handled correctly.
cat >flake.nix <<EOF
{
outputs = inputs: {
legacyPackages.$system = {
AAAAAASomeThingsFailToEvaluate = throw "nooo";
simple = import ./simple.nix;
};
};
}
EOF
nix flake show --json --legacy --all-systems > show-output.json
nix eval --impure --expr '
let show_output = builtins.fromJSON (builtins.readFile ./show-output.json);
in
assert show_output.legacyPackages.${builtins.currentSystem}.AAAAAASomeThingsFailToEvaluate == { };
assert show_output.legacyPackages.${builtins.currentSystem}.simple.name == "simple";
true
'