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Fix nix flake show --legacy when the evaluation fails

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`nix flake show --legacy` was aborting the evaluation a bit too eagerly
in case of error, so that running it on nixpkgs was only showing empty
packages sets.
Catch the error earlier to allow displaying the full set of packages
This commit is contained in:
regnat 2021-02-16 21:08:12 +01:00
parent 5d058d81f1
commit 5e07e4b281
1 changed files with 11 additions and 6 deletions
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17
src/nix/flake.cc
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@ -841,12 +841,17 @@ struct CmdFlakeShow : FlakeCommand
auto attrs = state->listAttrFields(value, pos);
for (const auto & [i, attr] : enumerate(attrs)) {
bool last = i + 1 == attrs.size();
auto value2 = state->getAttrField(value, {attr}, pos);
auto attrPath2(attrPath);
attrPath2.push_back(attr);
visit(*value2, pos, attrPath2,
fmt(ANSI_GREEN "%s%s" ANSI_NORMAL ANSI_BOLD "%s" ANSI_NORMAL, nextPrefix, last ? treeLast : treeConn, attr),
nextPrefix + (last ? treeNull : treeLine));
try {
auto value2 = state->getAttrField(value, {attr}, pos);
auto attrPath2(attrPath);
attrPath2.push_back(attr);
visit(*value2, pos, attrPath2,
fmt(ANSI_GREEN "%s%s" ANSI_NORMAL ANSI_BOLD "%s" ANSI_NORMAL, nextPrefix, last ? treeLast : treeConn, attr),
nextPrefix + (last ? treeNull : treeLine));
} catch (EvalError& e) {
if (!(attrPath.size() > 0 && attrPath[0] == "legacyPackages"))
throw;
}
}
};