fix: ignore forge-std artifacts in build --sizes (#7414)

crates/common/src/compile.rs

@@ -245,7 +245,16 @@ impl ProjectCompiler {
             }
 
             let mut size_report = SizeReport { contracts: BTreeMap::new() };
-            let artifacts: BTreeMap<_, _> = output.artifacts().collect();
+
+            let artifacts: BTreeMap<_, _> = output
+                .artifact_ids()
+                .filter(|(id, _)| {
+                    // filter out forge-std specific contracts
+                    !id.source.to_string_lossy().contains("/forge-std/src/")
+                })
+                .map(|(id, artifact)| (id.name, artifact))
+                .collect();
+
             for (name, artifact) in artifacts {
                 let size = deployed_contract_size(artifact).unwrap_or_default();
 
@@ -381,6 +390,7 @@ impl Display for SizeReport {
             Cell::new("Margin (kB)").add_attribute(Attribute::Bold).fg(Color::Blue),
         ]);
 
+        // filters out non dev contracts (Test or Script)
         let contracts = self.contracts.iter().filter(|(_, c)| !c.is_dev_contract && c.size > 0);
         for (name, contract) in contracts {
             let margin = CONTRACT_SIZE_LIMIT as isize - contract.size as isize;

crates/forge/tests/cli/build.rs

@@ -31,3 +31,12 @@ forgetest_init!(exact_build_output, |prj, cmd| {
     let stdout = cmd.stdout_lossy();
     assert!(stdout.contains("Compiling"), "\n{stdout}");
 });
+
+// tests build output is as expected
+forgetest_init!(build_sizes_no_forge_std, |prj, cmd| {
+    cmd.args(["build", "--sizes"]);
+    let stdout = cmd.stdout_lossy();
+    assert!(!stdout.contains("console"), "\n{stdout}");
+    assert!(!stdout.contains("std"), "\n{stdout}");
+    assert!(stdout.contains("Counter"), "\n{stdout}");
+});