fix(config): normalize optimizer settings

crates/config/src/lib.rs

@@ -669,15 +669,8 @@ impl Config {
         add_profile(&Self::DEFAULT_PROFILE);
         add_profile(&config.profile);
 
-        // Ref: https://github.com/foundry-rs/foundry/issues/9665
-        // Enables the optimizer if the `optimizer_runs` has been set.
-        let optimizer = config.optimizer();
-        if optimizer.runs.is_some_and(|runs| runs > 0) && optimizer.enabled.is_none() {
-            config.optimizer = Some(true);
-        } else if optimizer.runs.is_none() && optimizer.enabled.is_some_and(|enabled| enabled) {
-            // Default optimizer runs set to 200 if `optimizer = true`.
-            config.optimizer_runs = Some(200);
-        };
+        config.normalize_optimizer_settings();
+
         Ok(config)
     }
 
@@ -843,11 +836,37 @@ impl Config {
         self
     }
 
+    /// Normalizes optimizer settings.
+    /// See <https://github.com/foundry-rs/foundry/issues/9665>
+    pub fn normalized_optimizer_settings(mut self) -> Self {
+        self.normalize_optimizer_settings();
+        self
+    }
+
     /// Normalizes the evm version if a [SolcReq] is set to a valid version.
     pub fn normalize_evm_version(&mut self) {
         self.evm_version = self.get_normalized_evm_version();
     }
 
+    /// Normalizes optimizer settings:
+    /// - with default settings, optimizer is set to false and optimizer runs to 200
+    /// - if optimizer is set and optimizer runs not specified, then optimizer runs is set to 200
+    /// - enable optimizer if not explicitly set and optimizer runs set to a value greater than 0
+    pub fn normalize_optimizer_settings(&mut self) {
+        match (self.optimizer, self.optimizer_runs) {
+            // Default: set the optimizer to false and optimizer runs to 200.
+            (None, None) => {
+                self.optimizer = Some(false);
+                self.optimizer_runs = Some(200);
+            }
+            // Set the optimizer runs to 200 if the `optimizer` config set.
+            (Some(_), None) => self.optimizer_runs = Some(200),
+            // Enables optimizer if the `optimizer_runs` has been set with a value greater than 0.
+            (None, Some(runs)) => self.optimizer = Some(runs > 0),
+            _ => {}
+        }
+    }
+
     /// Returns the normalized [EvmVersion] if a [SolcReq] is set to a valid version or if the solc
     /// path is a valid solc binary.
     ///

crates/forge/bin/cmd/config.rs

@@ -37,6 +37,7 @@ impl ConfigArgs {
 
         let config = self
             .try_load_config_unsanitized_emit_warnings()?
+            .normalized_optimizer_settings()
             // we explicitly normalize the version, so mimic the behavior when invoking solc
             .normalized_evm_version();