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Add flag to enable meta

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I removed meta from the output in 434376f8e1 with the intention of adding it back gated by a flag, but that never happened.

Adding meta is quite a substantial increase in output size and has some non-trivial performance impact at scale, so it's best to leave it as opt-in.
This commit is contained in:
adisbladis 2022-01-06 13:19:15 +13:00
parent 0570194d0a
commit 3268f3a6af
2 changed files with 26 additions and 15 deletions
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10
src/nix-eval-jobs.cc
View file

@ -34,6 +34,7 @@ struct MyArgs : MixEvalArgs, MixCommonArgs
Path releaseExpr;
Path gcRootsDir;
bool flake = false;
bool meta = false;
size_t nrWorkers = 1;
size_t maxMemorySize = 4096;
pureEval evalMode = evalAuto;
@ -94,6 +95,12 @@ struct MyArgs : MixEvalArgs, MixCommonArgs
.handler = {&flake, true}
});
addFlag({
.longName = "meta",
.description = "include derivation meta field in output",
.handler = {&meta, true}
});
expectArg("expr", &releaseExpr);
}
};
@ -182,6 +189,7 @@ static void worker(
reply["outputs"][out.first] = out.second;
}
if (myArgs.meta) {
nlohmann::json meta;
for (auto & name : drv->queryMetaNames()) {
PathSet context;
@ -198,6 +206,8 @@ static void worker(
nlohmann::json field = nlohmann::json::parse(ss.str());
meta[name] = field;
}
reply["meta"] = meta;
}
/* Register the derivation as a GC root. !!! This
registers roots for jobs that we may have already

5
tests/test_eval.py
View file

@ -13,7 +13,7 @@ BIN = PROJECT_ROOT.joinpath("build", "src", "nix-eval-jobs")
def common_test(extra_args: List[str]) -> None:
with TemporaryDirectory() as tempdir:
cmd = [str(BIN), "--gc-roots-dir", tempdir] + extra_args
cmd = [str(BIN), "--gc-roots-dir", tempdir, "--meta"] + extra_args
res = subprocess.run(
cmd,
cwd=TEST_ROOT.joinpath("assets"),
@ -30,11 +30,12 @@ def common_test(extra_args: List[str]) -> None:
assert built_job["name"] == "job1"
assert built_job["outputs"]["out"].startswith("/nix/store")
assert built_job["drvPath"].endswith(".drv")
assert built_job["meta"]['broken'] is False
substituted_job = results[1]
assert substituted_job["attr"] == "substitutedJob"
assert substituted_job["name"].startswith("hello-")
assert substituted_job["meta"]['broken'] is False
def test_flake() -> None: