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Merge branch 'tomberek/show_json' of https://github.com/tomberek/nix

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This commit is contained in:
Eelco Dolstra 2021-09-14 16:58:35 +02:00
parent 275cb44f9f dc25856d74
commit f3259af73e
3 changed files with 54 additions and 18 deletions
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3
src/nix/flake-show.md
View file

@ -35,4 +35,7 @@ specified by flake reference *flake-url*. These are the top-level
attributes in the `outputs` of the flake, as well as lower-level
attributes for some standard outputs (e.g. `packages` or `checks`).
With `--json`, the output is in a JSON representation suitable for automatic
processing by other tools.
)""

67
src/nix/flake.cc
View file

@ -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 = [&]()
{
logger->cout("%s", headerPrefix);
if (!json){
logger->cout("%s", headerPrefix);
}
auto attrs = visitor.getAttrs();
for (const auto & [i, attr] : enumerate(attrs)) {
bool last = i + 1 == attrs.size();
@ -910,15 +924,18 @@ struct CmdFlakeShow : FlakeCommand
description = aDescription->getString();
}
*/
logger->cout("%s: %s '%s'",
headerPrefix,
attrPath.size() == 2 && attrPath[0] == "devShell" ? "development environment" :
attrPath.size() >= 2 && attrPath[0] == "devShells" ? "development environment" :
attrPath.size() == 3 && attrPath[0] == "checks" ? "derivation" :
attrPath.size() >= 1 && attrPath[0] == "hydraJobs" ? "derivation" :
"package",
name);
if (json){
populateJson(attrPath,name);
} else {
logger->cout("%s: %s '%s'",
headerPrefix,
attrPath.size() == 2 && attrPath[0] == "devShell" ? "development environment" :
attrPath.size() >= 2 && attrPath[0] == "devShells" ? "development environment" :
attrPath.size() == 3 && attrPath[0] == "checks" ? "derivation" :
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_WARNING "omitted" ANSI_NORMAL " (use '--legacy' to show)", headerPrefix);
logger->warn(fmt("%s: " ANSI_WARNING "omitted" ANSI_NORMAL " (use '--legacy' to show)", headerPrefix));
else {
if (visitor.isDerivation())
showDerivation();
@ -979,7 +996,11 @@ struct CmdFlakeShow : FlakeCommand
auto aType = visitor.maybeGetAttr("type");
if (!aType || aType->getString() != "app")
throw EvalError("not an app definition");
logger->cout("%s: app", headerPrefix);
if(json){
populateJson(attrPath,"app");
} else {
logger->cout("%s: app", headerPrefix);
}
}
else if (
@ -987,17 +1008,24 @@ struct CmdFlakeShow : FlakeCommand
(attrPath.size() == 2 && attrPath[0] == "templates"))
{
auto description = visitor.getAttr("description")->getString();
logger->cout("%s: template: " ANSI_BOLD "%s" ANSI_NORMAL, headerPrefix, description);
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_WARNING "unknown" ANSI_NORMAL);
"unknown";
if(json){
populateJson(attrPath,description);
} else {
logger->cout("%s: " ANSI_WARNING "%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());
}
}
};

2
tests/flakes.sh
View file

@ -392,12 +392,14 @@ git -C $templatesDir commit -m 'Initial'
nix flake check templates
nix flake show templates
nix flake show templates --json | jq
(cd $flake7Dir && nix flake init)
(cd $flake7Dir && nix flake init) # check idempotence
git -C $flake7Dir add flake.nix
nix flake check $flake7Dir
nix flake show $flake7Dir
nix flake show $flake7Dir --json | jq
git -C $flake7Dir commit -a -m 'Initial'
# Test 'nix flake new'.