fix(forge): makes forge script match correctly run function signature from source (#11244)

Author: mablr

crates/forge/tests/cli/script.rs

@@ -422,6 +422,41 @@ Script ran successfully.
 "#]]);
 });
 
+// Tests that the run command can run functions with arguments without specifying the signature
+// <https://github.com/foundry-rs/foundry/issues/11240>
+forgetest!(can_execute_script_command_with_args_no_sig, |prj, cmd| {
+    let script = prj
+        .add_source(
+            "Foo",
+            r#"
+contract Demo {
+    event log_string(string);
+    event log_uint(uint);
+    function run(uint256 a, uint256 b) external {
+        emit log_string("script ran");
+        emit log_uint(a);
+        emit log_uint(b);
+    }
+}
+   "#,
+        )
+        .unwrap();
+
+    cmd.arg("script").arg(script).arg("1").arg("2").assert_success().stdout_eq(str![[r#"
+[COMPILING_FILES] with [SOLC_VERSION]
+[SOLC_VERSION] [ELAPSED]
+Compiler run successful!
+Script ran successfully.
+[GAS]
+
+== Logs ==
+  script ran
+  1
+  2
+
+"#]]);
+});
+
 // Tests that the run command can run functions with return values
 forgetest!(can_execute_script_command_with_returned, |prj, cmd| {
     let script = prj

crates/script/src/lib.rs

@@ -96,7 +96,7 @@ pub struct ScriptArgs {
     pub target_contract: Option<String>,
 
     /// The signature of the function you want to call in the contract, or raw calldata.
-    #[arg(long, short, default_value = "run()")]
+    #[arg(long, short, default_value = "run")]
     pub sig: String,
 
     /// Max priority fee per gas for EIP1559 transactions.