CI: Rust on the dev Orin (l4t-rust): clippy -D warnings, test, build, glibc; fix 4 clippy lints

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01DDwfd6Ki8UfG4hK6W5YpJz

.gitea/workflows/rust.yml

@@ -0,0 +1,64 @@
+name: Rust (L4T)
+
+on:
+  push:
+    branches: [ master ]
+    paths:
+      - 'src/**'
+      - 'Cargo.toml'
+      - 'Cargo.lock'
+      - 'scripts/check-glibc.sh'
+      - '.gitea/workflows/rust.yml'
+  pull_request:
+    branches: [ master ]
+  workflow_dispatch:
+
+# Built natively on the development Orin (runner mikkeli-orin-nano-2-yukart, host mode,
+# label l4t-rust): the car Orin's own L4T userland, so the glibc check below proves the
+# binaries load there (project-yukart docs/REPOS.md). Plain git, no JavaScript actions:
+# every yukart repo is public, and this repo needs contracts beside it (include_str!).
+
+jobs:
+  build:
+    name: Clippy, test, build, glibc
+    runs-on: l4t-rust
+    steps:
+      - name: Checkout, with contracts beside it
+        env:
+          SERVER: ${{ gitea.server_url }}
+          REPO: ${{ github.event.repository.name }}
+          SHA: ${{ github.sha }}
+        run: |
+          set -euo pipefail
+          rm -rf ws && mkdir ws
+          git clone -q --depth 1 "$SERVER/yukart/contracts.git" ws/contracts
+          git init -q "ws/$REPO"
+          git -C "ws/$REPO" fetch -q --depth 1 "$SERVER/yukart/$REPO.git" "$SHA"
+          git -C "ws/$REPO" checkout -q FETCH_HEAD
+          echo "$REPO $(git -C ws/$REPO log --oneline -1); contracts $(git -C ws/contracts log --oneline -1)"
+          rustc --version; head -1 /etc/nv_tegra_release; ldd --version | sed -n 1p
+          # Kept between runs, in the runner's own home: a cold release build is minutes on the Orin.
+          echo "CARGO_TARGET_DIR=$HOME/target/$REPO" >> "$GITHUB_ENV"
+
+      - name: Clippy
+        working-directory: ws/${{ github.event.repository.name }}
+        run: cargo clippy --release --all-targets --locked -- -D warnings
+
+      - name: Test
+        working-directory: ws/${{ github.event.repository.name }}
+        run: cargo test --release --locked
+
+      - name: Build
+        working-directory: ws/${{ github.event.repository.name }}
+        run: cargo build --release --locked
+
+      - name: glibc ceiling (the car Orin's 2.35)
+        working-directory: ws/${{ github.event.repository.name }}
+        run: |
+          set -euo pipefail
+          bins=$(cargo metadata --format-version 1 --no-deps | python3 -c '
+          import json, sys
+          for p in json.load(sys.stdin)["packages"]:
+              for t in p["targets"]:
+                  if "bin" in t["kind"]: print(t["name"])')
+          for b in $bins; do scripts/check-glibc.sh "$CARGO_TARGET_DIR/release/$b"; done

src/bus-bench/main.rs

@@ -242,7 +242,9 @@ fn decode(p: &[u8], now: i64) -> Option<(u64, u32, Vec<i64>)> {
         return None;
     }
     let lat = p[HEADER..]
-        .chunks_exact(FRAME)
+        .as_chunks::<FRAME>()
+        .0
+        .iter()
         .map(|f| now - i64::from_le_bytes(f[0..8].try_into().unwrap()))
         .collect();
     Some((seq, count, lat))
@@ -253,7 +255,9 @@ fn frames(p: &[u8]) -> Option<Vec<(i64, u32, Vec<u8>)>> {
     decode(p, 0)?;
     Some(
         p[HEADER..]
-            .chunks_exact(FRAME)
+            .as_chunks::<FRAME>()
+            .0
+            .iter()
             .map(|f| {
                 let len = (f[12] as usize).min(8);
                 (i64::from_le_bytes(f[0..8].try_into().unwrap()), u32::from_le_bytes(f[8..12].try_into().unwrap()), f[16..16 + len].to_vec())

src/obd-poller/main.rs

@@ -112,7 +112,7 @@ impl Poller {
             let Some(r) = self.sock.recv(left)? else { return Ok(None) };
             // Single frame: [length, 0x41, pid, A, B, ...]. Anything else is not our answer.
             let len = (r.data[0] & 0x0F) as usize;
-            if r.data[0] >> 4 == 0 && len >= 2 && len <= 7 && r.data[1] == 0x41 && r.data[2] == pid {
+            if r.data[0] >> 4 == 0 && (2..=7).contains(&len) && r.data[1] == 0x41 && r.data[2] == pid {
                 return Ok(Some((r.ts_us, r.id, r.data[3..1 + len].to_vec())));
             }
         }
@@ -122,8 +122,7 @@ impl Poller {
     fn discover(&self) -> std::io::Result<Vec<u8>> {
         let mut all = Vec::new();
         let mut mask = 0x00u8;
-        loop {
+        while let Some((_, _, d)) = self.ask(mask)? {
-            let Some((_, _, d)) = self.ask(mask)? else { break };
             if d.len() < 4 {
                 break;
             }