feat: allow supplying function name via forge script --sig

crates/forge/tests/cli/script.rs

@@ -1179,3 +1179,21 @@ forgetest_async!(can_sign_with_script_wallet_multiple, |prj, cmd| {
         .await
         .simulate(ScriptOutcome::OkRun);
 });
+
+forgetest_async!(fails_with_function_name_and_overloads, |prj, cmd| {
+    let script = prj
+        .add_script(
+            "Sctipt.s.sol",
+            r#"
+contract Script {
+    function run() external {}
+
+    function run(address,uint256) external {}
+}
+            "#,
+        )
+        .unwrap();
+
+    cmd.arg("script").args([&script.to_string_lossy(), "--sig", "run"]);
+    assert!(cmd.stderr_lossy().contains("Multiple functions with the same name"));
+});

crates/script/src/lib.rs

@@ -12,7 +12,7 @@ use build::PreprocessedState;
 use clap::{Parser, ValueHint};
 use dialoguer::Confirm;
 use ethers_signers::Signer;
-use eyre::{ContextCompat, Result, WrapErr};
+use eyre::{ContextCompat, Result};
 use forge_verify::RetryArgs;
 use foundry_cli::{opts::CoreBuildArgs, utils::LoadConfig};
 use foundry_common::{
@@ -311,30 +311,38 @@ impl ScriptArgs {
     ///
     /// Note: We assume that the `sig` is already stripped of its prefix, See [`ScriptArgs`]
     fn get_method_and_calldata(&self, abi: &JsonAbi) -> Result<(Function, Bytes)> {
-        let (func, data) = if let Ok(func) = get_func(&self.sig) {
-            (
-                abi.functions().find(|&abi_func| abi_func.selector() == func.selector()).wrap_err(
-                    format!("Function `{}` is not implemented in your script.", self.sig),
-                )?,
-                encode_function_args(&func, &self.args)?.into(),
-            )
-        } else {
-            let decoded = hex::decode(&self.sig).wrap_err("Invalid hex calldata")?;
+        if let Ok(decoded) = hex::decode(&self.sig) {
             let selector = &decoded[..SELECTOR_LEN];
-            (
-                abi.functions().find(|&func| selector == &func.selector()[..]).ok_or_else(
-                    || {
-                        eyre::eyre!(
-                            "Function selector `{}` not found in the ABI",
-                            hex::encode(selector)
-                        )
-                    },
-                )?,
-                decoded.into(),
-            )
+            let func =
+                abi.functions().find(|func| selector == &func.selector()[..]).ok_or_else(|| {
+                    eyre::eyre!(
+                        "Function selector `{}` not found in the ABI",
+                        hex::encode(selector)
+                    )
+                })?;
+            return Ok((func.clone(), decoded.into()));
+        }
+
+        let func = if self.sig.contains('(') {
+            let func = get_func(&self.sig)?;
+            abi.functions()
+                .find(|&abi_func| abi_func.selector() == func.selector())
+                .wrap_err(format!("Function `{}` is not implemented in your script.", self.sig))?
+        } else {
+            let matching_functions =
+                abi.functions().filter(|func| func.name == self.sig).collect::<Vec<_>>();
+            match matching_functions.len() {
+                0 => eyre::bail!("Function `{}` not found in the ABI", self.sig),
+                1 => matching_functions[0],
+                2.. => eyre::bail!(
+                    "Multiple functions with the same name `{}` found in the ABI",
+                    self.sig
+                ),
+            }
         };
+        let data = encode_function_args(func, &self.args)?;
 
-        Ok((func.clone(), data))
+        Ok((func.clone(), data.into()))
     }
 
     /// Checks if the transaction is a deployment with either a size above the `CONTRACT_MAX_SIZE`