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Don't barf on registry parse errors

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This commit is contained in:
Eelco Dolstra 2020-04-02 19:09:17 +02:00
parent a6ff66b658
commit 485a87f22f
1 changed files with 39 additions and 34 deletions
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73
src/libfetchers/registry.cc
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@ -17,47 +17,52 @@ std::shared_ptr<Registry> Registry::read(
if (!pathExists(path))
return std::make_shared<Registry>(type);
auto json = nlohmann::json::parse(readFile(path));
try {
auto version = json.value("version", 0);
auto json = nlohmann::json::parse(readFile(path));
// FIXME: remove soon
if (version == 1) {
auto flakes = json["flakes"];
for (auto i = flakes.begin(); i != flakes.end(); ++i) {
auto url = i->value("url", i->value("uri", ""));
if (url.empty())
throw Error("flake registry '%s' lacks a 'url' attribute for entry '%s'",
path, i.key());
registry->entries.push_back(
{inputFromURL(i.key()), inputFromURL(url), {}});
}
}
auto version = json.value("version", 0);
else if (version == 2) {
for (auto & i : json["flakes"]) {
auto toAttrs = jsonToAttrs(i["to"]);
Attrs extraAttrs;
auto j = toAttrs.find("dir");
if (j != toAttrs.end()) {
extraAttrs.insert(*j);
toAttrs.erase(j);
// FIXME: remove soon
if (version == 1) {
auto flakes = json["flakes"];
for (auto i = flakes.begin(); i != flakes.end(); ++i) {
auto url = i->value("url", i->value("uri", ""));
if (url.empty())
throw Error("flake registry '%s' lacks a 'url' attribute for entry '%s'",
path, i.key());
registry->entries.push_back(
{inputFromURL(i.key()), inputFromURL(url), {}});
}
auto exact = i.find("exact");
registry->entries.push_back(
Entry {
.from = inputFromAttrs(jsonToAttrs(i["from"])),
.to = inputFromAttrs(toAttrs),
.extraAttrs = extraAttrs,
.exact = exact != i.end() && exact.value()
});
}
else if (version == 2) {
for (auto & i : json["flakes"]) {
auto toAttrs = jsonToAttrs(i["to"]);
Attrs extraAttrs;
auto j = toAttrs.find("dir");
if (j != toAttrs.end()) {
extraAttrs.insert(*j);
toAttrs.erase(j);
}
auto exact = i.find("exact");
registry->entries.push_back(
Entry {
.from = inputFromAttrs(jsonToAttrs(i["from"])),
.to = inputFromAttrs(toAttrs),
.extraAttrs = extraAttrs,
.exact = exact != i.end() && exact.value()
});
}
}
else
throw Error("flake registry '%s' has unsupported version %d", path, version);
} catch (nlohmann::json::exception & e) {
warn("cannot parse flake registry '%s': %s", path, e.what());
}
else
throw Error("flake registry '%s' has unsupported version %d", path, version);
return registry;
}