Fix Rust lint CI (#14602)

Author: erikjohnston

.github/workflows/tests.yml

@@ -109,7 +109,29 @@ jobs:
             components: clippy
       - uses: Swatinem/rust-cache@v2
 
-      - run: cargo clippy
+      - run: cargo clippy -- -D warnings
+
+  # We also lint against a nightly rustc so that we can lint the benchmark
+  # suite, which requires a nightly compiler.
+  lint-clippy-nightly:
+    runs-on: ubuntu-latest
+    needs: changes
+    if: ${{ needs.changes.outputs.rust == 'true' }}
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Install Rust
+        # There don't seem to be versioned releases of this action per se: for each rust
+        # version there is a branch which gets constantly rebased on top of master.
+        # We pin to a specific commit for paranoia's sake.
+        uses: dtolnay/rust-toolchain@e645b0cf01249a964ec099494d38d2da0f0b349f
+        with:
+            toolchain: nightly-2022-12-01
+            components: clippy
+      - uses: Swatinem/rust-cache@v2
+
+      - run: cargo clippy --all-features -- -D warnings
 
   lint-rustfmt:
     runs-on: ubuntu-latest

changelog.d/14602.misc

@@ -0,0 +1 @@
+Fix Rust lint CI.

rust/benches/evaluator.rs

@@ -33,10 +33,12 @@ fn bench_match_exact(b: &mut Bencher) {
     let eval = PushRuleEvaluator::py_new(
         flattened_keys,
         10,
-        0,
+        Some(0),
         Default::default(),
         Default::default(),
         true,
+        vec![],
+        false,
     )
     .unwrap();
 
@@ -67,10 +69,12 @@ fn bench_match_word(b: &mut Bencher) {
     let eval = PushRuleEvaluator::py_new(
         flattened_keys,
         10,
-        0,
+        Some(0),
         Default::default(),
         Default::default(),
         true,
+        vec![],
+        false,
     )
     .unwrap();
 
@@ -101,10 +105,12 @@ fn bench_match_word_miss(b: &mut Bencher) {
     let eval = PushRuleEvaluator::py_new(
         flattened_keys,
         10,
-        0,
+        Some(0),
         Default::default(),
         Default::default(),
         true,
+        vec![],
+        false,
     )
     .unwrap();
 
@@ -135,10 +141,12 @@ fn bench_eval_message(b: &mut Bencher) {
     let eval = PushRuleEvaluator::py_new(
         flattened_keys,
         10,
-        0,
+        Some(0),
         Default::default(),
         Default::default(),
         true,
+        vec![],
+        false,
     )
     .unwrap();
 

rust/src/push/evaluator.rs

@@ -12,10 +12,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-use std::borrow::Cow;
 use std::collections::BTreeMap;
 
-use crate::push::{PushRule, PushRules};
 use anyhow::{Context, Error};
 use lazy_static::lazy_static;
 use log::warn;
@@ -98,6 +96,7 @@ pub struct PushRuleEvaluator {
 #[pymethods]
 impl PushRuleEvaluator {
     /// Create a new `PushRuleEvaluator`. See struct docstring for details.
+    #[allow(clippy::too_many_arguments)]
     #[new]
     pub fn py_new(
         flattened_keys: BTreeMap<String, String>,
@@ -153,15 +152,12 @@ impl PushRuleEvaluator {
             let mut has_rver_condition = false;
 
             for condition in push_rule.conditions.iter() {
-                has_rver_condition = has_rver_condition
-                    || match condition {
-                        Condition::Known(known) => match known {
-                            // per MSC3932, we just need *any* room version condition to match
-                            KnownCondition::RoomVersionSupports { feature: _ } => true,
-                            _ => false,
-                        },
-                        _ => false,
-                    };
+                has_rver_condition |= matches!(
+                    condition,
+                    // per MSC3932, we just need *any* room version condition to match
+                    Condition::Known(KnownCondition::RoomVersionSupports { feature: _ }),
+                );
+
                 match self.match_condition(condition, user_id, display_name) {
                     Ok(true) => {}
                     Ok(false) => continue 'outer,
@@ -444,6 +440,10 @@ fn push_rule_evaluator() {
 
 #[test]
 fn test_requires_room_version_supports_condition() {
+    use std::borrow::Cow;
+
+    use crate::push::{PushRule, PushRules};
+
     let mut flattened_keys = BTreeMap::new();
     flattened_keys.insert("content.body".to_string(), "foo bar bob hello".to_string());
     let flags = vec![RoomVersionFeatures::ExtensibleEvents.as_str().to_string()];