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Merge pull request #112 from nix-community/build-uncached

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Add option to check cache status
This commit is contained in:
Jörg Thalheim 2022-09-15 11:07:19 +02:00 committed by GitHub
parent e257e90118 f8fa3ea069
commit 40c4761a2d
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GPG key ID: 4AEE18F83AFDEB23
3 changed files with 100 additions and 63 deletions
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6
README.md
View file

@ -48,12 +48,14 @@ USAGE: nix-eval-jobs [options] expr
--arg Pass the value *expr* as the argument *name* to Nix functions.
--argstr Pass the string *string* as the argument *name* to Nix functions.
--check-cache-status Check if the derivations are present locally or in any configured substituters (i.e. binary cache). The information will be exposed in the `isCached` field of the JSON output.
--debug Set the logging verbosity level to 'debug'.
--eval-store The Nix store to use for evaluations.
--expr treat the argument as a Nix expression
--flake build a flake
--gc-roots-dir garbage collector roots directory
--help show usage information
--impure set evaluation mode
--impure allow impure expressions
--include Add *path* to the list of locations used to look up `<...>` file names.
--log-format Set the format of log output; one of `raw`, `internal-json`, `bar` or `bar-with-logs`.
--max-memory-size maximum evaluation memory size
@ -61,6 +63,7 @@ USAGE: nix-eval-jobs [options] expr
--option Set the Nix configuration setting *name* to *value* (overriding `nix.conf`).
--override-flake Override the flake registries, redirecting *original-ref* to *resolved-ref*.
--quiet Decrease the logging verbosity level.
--show-trace print out a stack trace in case of evaluation errors
--verbose Increase the logging verbosity level.
--workers number of evaluate workers
```
@ -83,7 +86,6 @@ single large log file. In the
we collect example ci configuration for various CIs.
## Organisation of this repository
On the `main` branch we target nixUnstable. When a release of nix happens, we

74
src/nix-eval-jobs.cc
View file

@ -44,6 +44,7 @@ struct MyArgs : MixEvalArgs, MixCommonArgs {
bool meta = false;
bool showTrace = false;
bool impure = false;
bool checkCacheStatus = false;
size_t nrWorkers = 1;
size_t maxMemorySize = 4096;
@ -93,6 +94,15 @@ struct MyArgs : MixEvalArgs, MixCommonArgs {
.description = "include derivation meta field in output",
.handler = {&meta, true}});
addFlag(
{.longName = "check-cache-status",
.description =
"Check if the derivations are present locally or in "
"any configured substituters (i.e. binary cache). The "
"information "
"will be exposed in the `isCached` field of the JSON output.",
.handler = {&checkCacheStatus, true}});
addFlag({.longName = "show-trace",
.description =
"print out a stack trace in case of evaluation errors",
@ -171,11 +181,26 @@ Value *topLevelValue(EvalState &state, Bindings &autoArgs) {
: releaseExprTopLevelValue(state, autoArgs);
}
bool queryIsCached(Store &store, std::map<std::string, std::string> &outputs) {
uint64_t downloadSize, narSize;
StorePathSet willBuild, willSubstitute, unknown;
std::vector<StorePathWithOutputs> paths;
for (auto const &[key, val] : outputs) {
paths.push_back(followLinksToStorePathWithOutputs(store, val));
}
store.queryMissing(toDerivedPaths(paths), willBuild, willSubstitute,
unknown, downloadSize, narSize);
return willBuild.empty() && unknown.empty();
}
/* The fields of a derivation that are printed in json form */
struct Drv {
std::string name;
std::string system;
std::string drvPath;
bool isCached;
std::map<std::string, std::string> outputs;
std::optional<nlohmann::json> meta;
@ -209,6 +234,9 @@ struct Drv {
}
meta = meta_;
}
if (myArgs.checkCacheStatus) {
isCached = queryIsCached(*localStore, outputs);
}
name = drvInfo.queryName();
system = drvInfo.querySystem();
@ -217,15 +245,18 @@ struct Drv {
};
static void to_json(nlohmann::json &json, const Drv &drv) {
json = nlohmann::json{
{"name", drv.name},
json = nlohmann::json{{"name", drv.name},
{"system", drv.system},
{"drvPath", drv.drvPath},
{"outputs", drv.outputs},
};
{"outputs", drv.outputs}};
if (drv.meta.has_value())
if (drv.meta.has_value()) {
json["meta"] = drv.meta.value();
}
if (myArgs.checkCacheStatus) {
json["isCached"] = drv.isCached;
}
}
std::string attrPathJoin(json input) {
@ -266,8 +297,8 @@ static void worker(EvalState &state, Bindings &autoArgs, AutoCloseFD &to,
auto v = state.allocValue();
state.autoCallFunction(autoArgs, *vTmp, *v);
if (v->type() == nAttrs) {
if (auto drvInfo = getDerivation(state, *v, false)) {
auto drv = Drv(state, *drvInfo);
reply.update(drv);
@ -279,29 +310,29 @@ static void worker(EvalState &state, Bindings &autoArgs, AutoCloseFD &to,
std::string(baseNameOf(drv.drvPath));
if (!pathExists(root)) {
auto localStore =
state.store.dynamic_pointer_cast<LocalFSStore>();
state.store
.dynamic_pointer_cast<LocalFSStore>();
auto storePath =
localStore->parseStorePath(drv.drvPath);
localStore->addPermRoot(storePath, root);
}
}
}
else if (v->type() == nAttrs) {
} else {
auto attrs = nlohmann::json::array();
bool recurse =
path.size() == 0; // Dont require `recurseForDerivations =
// true;` for top-level attrset
path.size() == 0; // Dont require `recurseForDerivations
// = true;` for top-level attrset
for (auto &i : v->attrs->lexicographicOrder(state.symbols)) {
for (auto &i :
v->attrs->lexicographicOrder(state.symbols)) {
const std::string &name = state.symbols[i->name];
attrs.push_back(name);
if (name == "recurseForDerivations") {
auto attrv =
v->attrs->get(state.sRecurseForDerivations);
recurse = state.forceBool(*attrv->value, attrv->pos);
recurse =
state.forceBool(*attrv->value, attrv->pos);
}
}
if (recurse)
@ -309,17 +340,12 @@ static void worker(EvalState &state, Bindings &autoArgs, AutoCloseFD &to,
else
reply["attrs"] = nlohmann::json::array();
}
else if (v->type() == nNull)
;
else
throw TypeError("attribute '%s' is %s, which is not supported",
path, showType(*v));
} else {
// We ignore everything that cannot be build
reply["attrs"] = nlohmann::json::array();
}
} catch (EvalError &e) {
auto err = e.info();
std::ostringstream oss;
showErrorInfo(oss, err, loggerSettings.showTrace.get());
auto msg = oss.str();

27
tests/test_eval.py
View file

@ -4,14 +4,14 @@ import subprocess
import json
from tempfile import TemporaryDirectory
from pathlib import Path
from typing import List
from typing import List, Dict, Any
TEST_ROOT = Path(__file__).parent.resolve()
PROJECT_ROOT = TEST_ROOT.parent
BIN = PROJECT_ROOT.joinpath("build", "src", "nix-eval-jobs")
def common_test(extra_args: List[str]) -> None:
def common_test(extra_args: List[str]) -> List[Dict[str, Any]]:
with TemporaryDirectory() as tempdir:
cmd = [str(BIN), "--gc-roots-dir", tempdir, "--meta"] + extra_args
res = subprocess.run(
@ -23,7 +23,7 @@ def common_test(extra_args: List[str]) -> None:
)
results = [json.loads(r) for r in res.stdout.split("\n") if r]
assert len(results) == 5
assert len(results) == 4
built_job = results[0]
assert built_job["attr"] == "builtJob"
@ -40,21 +40,30 @@ def common_test(extra_args: List[str]) -> None:
assert recurse_drv["attr"] == "recurse.drvB"
assert recurse_drv["name"] == "drvB"
recurse_recurse_bool = results[3]
assert "error" in recurse_recurse_bool
substituted_job = results[4]
substituted_job = results[3]
assert substituted_job["attr"] == "substitutedJob"
assert substituted_job["name"].startswith("hello-")
assert substituted_job["meta"]["broken"] is False
return results
def test_flake() -> None:
common_test(["--flake", ".#hydraJobs"])
results = common_test(["--flake", ".#hydraJobs"])
for result in results:
assert "isCached" not in result
def test_query_cache_status() -> None:
results = common_test(["--flake", ".#hydraJobs", "--check-cache-status"])
# FIXME in the nix sandbox we cannot query binary caches, this would need some local one
for result in results:
assert "isCached" in result
def test_expression() -> None:
common_test(["ci.nix"])
results = common_test(["ci.nix"])
for result in results:
assert "isCached" not in result
with open(TEST_ROOT.joinpath("assets/ci.nix"), "r") as ci_nix:
common_test(["-E", ci_nix.read()])