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Enable JSON option to show flakes

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`nix-flake show --json`
This commit is contained in:
Tom Bereknyei 2021-08-17 23:04:48 -04:00
parent d64f9671fc
commit a82de5b31b
1 changed files with 49 additions and 18 deletions
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45
src/nix/flake.cc
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@ -846,7 +846,7 @@ struct CmdFlakeArchive : FlakeCommand, MixJSON, MixDryRun
}
};
struct CmdFlakeShow : FlakeCommand
struct CmdFlakeShow : FlakeCommand, MixJSON
{
bool showLegacy = false;
@ -878,6 +878,18 @@ struct CmdFlakeShow : FlakeCommand
std::function<void(eval_cache::AttrCursor & visitor, const std::vector<Symbol> & attrPath, const std::string & headerPrefix, const std::string & nextPrefix)> visit;
nlohmann::json j;
// Populate json attributes along `attrPath` with a leaf value of `name`
auto populateJson = [&](const std::vector<Symbol> & attrPath, const std::string name)
{
nlohmann::json* r = & j;
for (const auto & element : attrPath){
(*r)[element] = (*r)[element].is_null() ? nlohmann::json({}) : (*r)[element];
r = & (*r)[element];
}
(*r) = name;
};
visit = [&](eval_cache::AttrCursor & visitor, const std::vector<Symbol> & attrPath, const std::string & headerPrefix, const std::string & nextPrefix)
{
Activity act(*logger, lvlInfo, actUnknown,
@ -885,7 +897,9 @@ struct CmdFlakeShow : FlakeCommand
try {
auto recurse = [&]()
{
if (!json){
logger->cout("%s", headerPrefix);
}
auto attrs = visitor.getAttrs();
for (const auto & [i, attr] : enumerate(attrs)) {
bool last = i + 1 == attrs.size();
@ -910,7 +924,9 @@ struct CmdFlakeShow : FlakeCommand
description = aDescription->getString();
}
*/
if (json){
populateJson(attrPath,name);
} else {
logger->cout("%s: %s '%s'",
headerPrefix,
attrPath.size() == 2 && attrPath[0] == "devShell" ? "development environment" :
@ -919,6 +935,7 @@ struct CmdFlakeShow : FlakeCommand
attrPath.size() >= 1 && attrPath[0] == "hydraJobs" ? "derivation" :
"package",
name);
}
};
if (attrPath.size() == 0
@ -962,7 +979,7 @@ struct CmdFlakeShow : FlakeCommand
if (attrPath.size() == 1)
recurse();
else if (!showLegacy)
logger->cout("%s: " ANSI_YELLOW "omitted" ANSI_NORMAL " (use '--legacy' to show)", headerPrefix);
logger->warn(fmt("%s: " ANSI_YELLOW "omitted" ANSI_NORMAL " (use '--legacy' to show)", headerPrefix));
else {
if (visitor.isDerivation())
showDerivation();
@ -979,25 +996,36 @@ struct CmdFlakeShow : FlakeCommand
auto aType = visitor.maybeGetAttr("type");
if (!aType || aType->getString() != "app")
throw EvalError("not an app definition");
if(json){
populateJson(attrPath,"app");
} else {
logger->cout("%s: app", headerPrefix);
}
}
else if (
(attrPath.size() == 1 && attrPath[0] == "defaultTemplate") ||
(attrPath.size() == 2 && attrPath[0] == "templates"))
{
auto description = visitor.getAttr("description")->getString();
if(json){
populateJson(attrPath,description);
} else {
logger->cout("%s: template: " ANSI_BOLD "%s" ANSI_NORMAL, headerPrefix, description);
}
}
else {
logger->cout("%s: %s",
headerPrefix,
(attrPath.size() == 1 && attrPath[0] == "overlay")
auto description = (attrPath.size() == 1 && attrPath[0] == "overlay")
|| (attrPath.size() == 2 && attrPath[0] == "overlays") ? "Nixpkgs overlay" :
attrPath.size() == 2 && attrPath[0] == "nixosConfigurations" ? "NixOS configuration" :
attrPath.size() == 2 && attrPath[0] == "nixosModules" ? "NixOS module" :
ANSI_YELLOW "unknown" ANSI_NORMAL);
"unknown";
if(json){
populateJson(attrPath,description);
} else {
logger->cout("%s: " ANSI_YELLOW "%s" ANSI_NORMAL, headerPrefix, description);
}
}
} catch (EvalError & e) {
if (!(attrPath.size() > 0 && attrPath[0] == "legacyPackages"))
@ -1008,6 +1036,9 @@ struct CmdFlakeShow : FlakeCommand
auto cache = openEvalCache(*state, flake);
visit(*cache->getRoot(), {}, fmt(ANSI_BOLD "%s" ANSI_NORMAL, flake->flake.lockedRef), "");
if(json){
logger->cout("%s", j.dump());
}
}
};