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perf(linter): avoid cloning rule options #16338

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Merged
graphite-app merged 1 commit into from
Dec 1, 2025
Merged

perf(linter): avoid cloning rule options #16338

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17 changes: 9 additions & 8 deletions crates/oxc_linter/src/config/rules.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -230,7 +230,7 @@ impl<'de> Deserialize<'de> for OxlintRules {
let mut rules = vec![];
while let Some((key, value)) = map.next_entry::<String, serde_json::Value>()? {
let (plugin_name, rule_name) = parse_rule_key(&key);
let (severity, config) = parse_rule_value(&value).map_err(de::Error::custom)?;
let (severity, config) = parse_rule_value(value).map_err(de::Error::custom)?;
rules.push(ESLintRule { plugin_name, rule_name, severity, config });
}

Expand Down Expand Up @@ -282,31 +282,32 @@ pub(super) fn unalias_plugin_name(plugin_name: &str, rule_name: &str) -> (String
}

fn parse_rule_value(
value: &serde_json::Value,
value: serde_json::Value,
) -> Result<(AllowWarnDeny, Option<serde_json::Value>), Error> {
match value {
serde_json::Value::String(_) | serde_json::Value::Number(_) => {
let severity = AllowWarnDeny::try_from(value)?;
let severity = AllowWarnDeny::try_from(&value)?;
Ok((severity, None))
}

serde_json::Value::Array(v) => {
serde_json::Value::Array(mut v) => {
if v.is_empty() {
return Err(failed_to_parse_rule_value(
&value.to_string(),
&serde_json::Value::Array(v).to_string(),
"Type should be `[SeverityConf, ...any[]`",
)
.into());
}

// The first item should be SeverityConf
let severity = AllowWarnDeny::try_from(v.first().unwrap())?;
// e.g. ["warn"], [0]
let config = if v.len() == 1 {
// e.g. ["warn"], [0]
None
// e.g. ["error", "args", { type: "whatever" }, ["len", "also"]]
} else {
Some(serde_json::Value::Array(v.iter().skip(1).cloned().collect::<Vec<_>>()))
// e.g. ["error", "args", { type: "whatever" }, ["len", "also"]]
v.remove(0);
Some(serde_json::Value::Array(v))
};

Ok((severity, config))
Expand Down
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