simulator: concurrent connection support

[pereman2]

This commit adds support to run connections concurrently with option --max_connections, we achieve this with simple futures which we poll until they succeed to advance to next interaction for each connection/plan.

[blacksmith-sh]

2 Jobs Failed:

Rust / cargo-fmt-check

Step "Check formatting" from job "cargo-fmt-check" is failing. The last 20 log lines are:

[...]
  > Run cargo fmt --check
  cargo fmt --check
  shell: /usr/bin/bash -e {0}
  env:
    CARGO_TERM_COLOR: always
    GITHUB_REPO_NAME: tursodatabase/turso
    CARGO_HOME: /home/runner/.cargo
    CARGO_INCREMENTAL: 0
Diff in /home/runner/_work/turso/turso/simulator/runner/execution.rs:217:
         }
         Interaction::FsyncQuery(query) => {
             // SAFETY: we lock connection only inside execute plan which is async
-            let results = interaction.execute_fsync_query(connection.clone(), &mut env.lock().unwrap());
+            let results =
+                interaction.execute_fsync_query(connection.clone(), &mut env.lock().unwrap());
             tracing::debug!(?results);
             state.lock().unwrap().stack.push(results);
 
Error: Process completed with exit code 1.

Rust / clippy

Step "Clippy" from job "clippy" is failing. The last 20 log lines are:

[...]
200 ~                 ),
    |

error: variables can be used directly in the `format!` string
   --> simulator/runner/doublecheck.rs:197:17
    |
197 | /                 format!(
198 | |                     "connection and doublecheck are not both connected or disconnected {} vs {}",
199 | |                     connection, doublecheck_connection
200 | |                 )
    | |_________________^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#uninlined_format_args
    = note: `-D clippy::uninlined-format-args` implied by `-D warnings`
    = help: to override `-D warnings` add `#[allow(clippy::uninlined_format_args)]`

error: could not compile `limbo_sim` (bin "limbo_sim" test) due to 7 previous errors
warning: build failed, waiting for other jobs to finish...
error: could not compile `limbo_sim` (bin "limbo_sim") due to 7 previous errors
Error: Process completed with exit code 101.

---

Summary: 7 successful workflows, 1 failed workflow

• ✅ Go Tests (1 job succeeded)
• ✅ Dart/Flutter (3 jobs succeeded)
• ✅ Python (21 jobs succeeded)
• ✅ Java Tests (1 job succeeded)
• ✅ Rust Benchmarks+Nyrkiö (5 jobs succeeded)
• ✅ JavaScript (7 jobs succeeded)
• ✅ Release (1 job succeeded)
• ❌ Rust (7 jobs succeeded, 2 jobs failed)

Last updated: 2025-07-21 08:54:02 UTC