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Merge pull request #11297 from shivaraj-bh/flake-apps-description

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`nix flake show`: Support `meta` attribute for `apps`
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Robert Hensing 2024-08-17 13:12:01 +02:00 committed by GitHub
commit c458598647
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3 changed files with 89 additions and 11 deletions
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53
src/nix/flake.cc
View File

@ -437,14 +437,39 @@ struct CmdFlakeCheck : FlakeCommand
auto checkApp = [&](const std::string & attrPath, Value & v, const PosIdx pos) {
try {
#if 0
// FIXME
auto app = App(*state, v);
for (auto & i : app.context) {
auto [drvPathS, outputName] = NixStringContextElem::parse(i);
store->parseStorePath(drvPathS);
Activity act(*logger, lvlInfo, actUnknown, fmt("checking app '%s'", attrPath));
state->forceAttrs(v, pos, "");
if (auto attr = v.attrs()->get(state->symbols.create("type")))
state->forceStringNoCtx(*attr->value, attr->pos, "");
else
throw Error("app '%s' lacks attribute 'type'", attrPath);
if (auto attr = v.attrs()->get(state->symbols.create("program"))) {
if (attr->name == state->symbols.create("program")) {
NixStringContext context;
state->forceString(*attr->value, context, attr->pos, "");
}
} else
throw Error("app '%s' lacks attribute 'program'", attrPath);
if (auto attr = v.attrs()->get(state->symbols.create("meta"))) {
state->forceAttrs(*attr->value, attr->pos, "");
if (auto dAttr = attr->value->attrs()->get(state->symbols.create("description")))
state->forceStringNoCtx(*dAttr->value, dAttr->pos, "");
else
logWarning({
.msg = HintFmt("app '%s' lacks attribute 'meta.description'", attrPath),
});
} else
logWarning({
.msg = HintFmt("app '%s' lacks attribute 'meta'", attrPath),
});
for (auto & attr : *v.attrs()) {
std::string_view name(state->symbols[attr.name]);
if (name != "type" && name != "program" && name != "meta")
throw Error("app '%s' has unsupported attribute '%s'", attrPath, name);
}
#endif
} catch (Error & e) {
e.addTrace(resolve(pos), HintFmt("while checking the app definition '%s'", attrPath));
reportError(e);
@ -629,7 +654,7 @@ struct CmdFlakeCheck : FlakeCommand
const auto & attr_name = state->symbols[attr.name];
checkSystemName(attr_name, attr.pos);
if (checkSystemType(attr_name, attr.pos)) {
checkApp(
checkDerivation(
fmt("%s.%s", name, attr_name),
*attr.value, attr.pos);
};
@ -1251,8 +1276,7 @@ struct CmdFlakeShow : FlakeCommand, MixJSON
}
j.emplace("type", "derivation");
j.emplace("name", name);
if (description)
j.emplace("description", *description);
j.emplace("description", description ? *description : "");
} else {
logger->cout("%s: %s '%s'",
headerPrefix,
@ -1340,12 +1364,19 @@ struct CmdFlakeShow : FlakeCommand, MixJSON
(attrPath.size() == 3 && attrPathS[0] == "apps"))
{
auto aType = visitor.maybeGetAttr("type");
std::optional<std::string> description;
if (auto aMeta = visitor.maybeGetAttr(state->sMeta)) {
if (auto aDescription = aMeta->maybeGetAttr(state->sDescription))
description = aDescription->getString();
}
if (!aType || aType->getString() != "app")
state->error<EvalError>("not an app definition").debugThrow();
if (json) {
j.emplace("type", "app");
if (description)
j.emplace("description", *description);
} else {
logger->cout("%s: app", headerPrefix);
logger->cout("%s: app: " ANSI_BOLD "%s" ANSI_NORMAL, headerPrefix, description ? *description : "no description");
}
}

3
src/nix/run.md
View File

@ -80,6 +80,7 @@ An app is specified by a flake output attribute named
apps.x86_64-linux.blender_2_79 = {
type = "app";
program = "${self.packages.x86_64-linux.blender_2_79}/bin/blender";
meta.description = "Run Blender, a free and open-source 3D creation suite.";
};
```
@ -90,4 +91,6 @@ The only supported attributes are:
* `program` (required): The full path of the executable to run. It
must reside in the Nix store.
* `meta.description` (optional): A description of the app.
)""

44
tests/functional/flakes/check.sh
View File

@ -91,3 +91,47 @@ nix flake check $flakeDir
checkRes=$(nix flake check --all-systems --keep-going $flakeDir 2>&1 && fail "nix flake check --all-systems should have failed" || true)
echo "$checkRes" | grepQuiet "packages.system-1.default"
echo "$checkRes" | grepQuiet "packages.system-2.default"
cat > $flakeDir/flake.nix <<EOF
{
outputs = { self }: {
apps.system-1.default = {
type = "app";
program = "foo";
};
apps.system-2.default = {
type = "app";
program = "bar";
meta.description = "baz";
};
};
}
EOF
nix flake check --all-systems $flakeDir
cat > $flakeDir/flake.nix <<EOF
{
outputs = { self }: {
apps.system-1.default = {
type = "app";
program = "foo";
unknown-attr = "bar";
};
};
}
EOF
checkRes=$(nix flake check --all-systems $flakeDir 2>&1 && fail "nix flake check --all-systems should have failed" || true)
echo "$checkRes" | grepQuiet "unknown-attr"
cat > $flakeDir/flake.nix <<EOF
{
outputs = { self }: {
formatter.system-1 = "foo";
};
}
EOF
checkRes=$(nix flake check --all-systems $flakeDir 2>&1 && fail "nix flake check --all-systems should have failed" || true)
echo "$checkRes" | grepQuiet "formatter.system-1"