feat(reth-bench-compare): add reth command to summary output

bin/reth-bench-compare/src/cli.rs

@@ -506,8 +506,8 @@ async fn run_warmup_phase(
     // Build additional args with conditional --debug.startup-sync-state-idle flag
     let additional_args = args.build_additional_args("warmup", args.baseline_args.as_ref());
 
-    // Start reth node for warmup
-    let mut node_process =
+    // Start reth node for warmup (command is not stored for warmup phase)
+    let (mut node_process, _warmup_command) =
         node_manager.start_node(&binary_path, warmup_ref, "warmup", &additional_args).await?;
 
     // Wait for node to be ready and get its current tip
@@ -607,8 +607,8 @@ async fn run_benchmark_workflow(
         // Build additional args with conditional --debug.startup-sync-state-idle flag
         let additional_args = args.build_additional_args(ref_type, base_args_str);
 
-        // Start reth node
-        let mut node_process =
+        // Start reth node and capture the command for reporting
+        let (mut node_process, reth_command) =
             node_manager.start_node(&binary_path, git_ref, ref_type, &additional_args).await?;
 
         // Wait for node to be ready and get its current tip (wherever it is)
@@ -645,8 +645,9 @@ async fn run_benchmark_workflow(
         // Store results for comparison
         comparison_generator.add_ref_results(ref_type, &output_dir)?;
 
-        // Set the benchmark run timestamps
+        // Set the benchmark run timestamps and reth command
         comparison_generator.set_ref_timestamps(ref_type, benchmark_start, benchmark_end)?;
+        comparison_generator.set_ref_command(ref_type, reth_command)?;
 
         info!("Completed {} reference benchmark", ref_type);
     }

bin/reth-bench-compare/src/comparison.rs

@@ -21,6 +21,8 @@ pub(crate) struct ComparisonGenerator {
     feature_ref_name: String,
     baseline_results: Option<BenchmarkResults>,
     feature_results: Option<BenchmarkResults>,
+    baseline_command: Option<String>,
+    feature_command: Option<String>,
 }
 
 /// Represents the results from a single benchmark run
@@ -89,6 +91,7 @@ pub(crate) struct RefInfo {
     pub summary: BenchmarkSummary,
     pub start_timestamp: Option<DateTime<Utc>>,
     pub end_timestamp: Option<DateTime<Utc>>,
+    pub reth_command: Option<String>,
 }
 
 /// Summary of the comparison between references.
@@ -142,6 +145,8 @@ impl ComparisonGenerator {
             feature_ref_name: args.feature_ref.clone(),
             baseline_results: None,
             feature_results: None,
+            baseline_command: None,
+            feature_command: None,
         }
     }
 
@@ -206,6 +211,21 @@ impl ComparisonGenerator {
         Ok(())
     }
 
+    /// Set the reth command for a reference
+    pub(crate) fn set_ref_command(&mut self, ref_type: &str, command: String) -> Result<()> {
+        match ref_type {
+            "baseline" => {
+                self.baseline_command = Some(command);
+            }
+            "feature" => {
+                self.feature_command = Some(command);
+            }
+            _ => return Err(eyre!("Unknown reference type: {}", ref_type)),
+        }
+
+        Ok(())
+    }
+
     /// Generate the final comparison report
     pub(crate) async fn generate_comparison_report(&self) -> Result<()> {
         info!("Generating comparison report...");
@@ -230,12 +250,14 @@ impl ComparisonGenerator {
                 summary: baseline.summary.clone(),
                 start_timestamp: baseline.start_timestamp,
                 end_timestamp: baseline.end_timestamp,
+                reth_command: self.baseline_command.clone(),
             },
             feature: RefInfo {
                 ref_name: feature.ref_name.clone(),
                 summary: feature.summary.clone(),
                 start_timestamp: feature.start_timestamp,
                 end_timestamp: feature.end_timestamp,
+                reth_command: self.feature_command.clone(),
             },
             comparison_summary,
             per_block_comparisons,
@@ -599,6 +621,9 @@ impl ComparisonGenerator {
                 end.format("%Y-%m-%d %H:%M:%S UTC")
             );
         }
+        if let Some(ref cmd) = report.baseline.reth_command {
+            println!("  Command: {}", cmd);
+        }
         println!();
 
         println!("Feature Summary:");
@@ -628,6 +653,9 @@ impl ComparisonGenerator {
                 end.format("%Y-%m-%d %H:%M:%S UTC")
             );
         }
+        if let Some(ref cmd) = report.feature.reth_command {
+            println!("  Command: {}", cmd);
+        }
         println!();
     }
 }

bin/reth-bench-compare/src/node.rs

@@ -240,19 +240,24 @@ impl NodeManager {
     }
 
     /// Start a reth node using the specified binary path and return the process handle
+    /// along with the formatted reth command string for reporting.
     pub(crate) async fn start_node(
         &mut self,
         binary_path: &std::path::Path,
         _git_ref: &str,
         ref_type: &str,
         additional_args: &[String],
-    ) -> Result<tokio::process::Child> {
+    ) -> Result<(tokio::process::Child, String)> {
         // Store the binary path for later use (e.g., in unwind_to_block)
         self.binary_path = Some(binary_path.to_path_buf());
 
         let binary_path_str = binary_path.to_string_lossy();
         let (reth_args, _) = self.build_reth_args(&binary_path_str, additional_args, ref_type);
 
+        // Format the reth command string for reporting
+        let reth_command = shlex::try_join(reth_args.iter().map(|s| s.as_str()))
+            .wrap_err("Failed to format reth command string")?;
+
         // Log additional arguments if any
         if !self.additional_reth_args.is_empty() {
             info!("Using common additional reth arguments: {:?}", self.additional_reth_args);
@@ -346,7 +351,7 @@ impl NodeManager {
         // Give the node a moment to start up
         sleep(Duration::from_secs(5)).await;
 
-        Ok(child)
+        Ok((child, reth_command))
     }
 
     /// Wait for the node to be ready and return its current tip