Merge pull request #50 from propeller-heads/fp/fix-build-runtime-script

fix(script): Fix build runtime script to handle empty constructor

evm/scripts/_buildRuntime.s.sol

@@ -5,12 +5,32 @@ import "forge-std/Script.sol";
 
 contract buildRuntime is Script {
     function run() external {
-        bytes memory args = vm.envBytes("__PROPELLER_DEPLOY_ARGS");
+        bytes memory deployArgs = getDeployArgs();
-        string memory contractRef = vm.envString("__PROPELLER_CONTRACT");
+        string memory contractName = vm.envString("__PROPELLER_CONTRACT");
         string memory outFilePath = vm.envString("__PROPELLER_OUT_FILE");
-        address deployedContract = deployCode(contractRef, args);
+
+        address deployedContract = deployContract(contractName, deployArgs);
 
         bytes memory deployedCode = deployedContract.code;
         vm.writeFileBinary(outFilePath, deployedCode);
     }
+
+    function getDeployArgs() internal view returns (bytes memory) {
+        try vm.envBytes("__PROPELLER_DEPLOY_ARGS") returns (bytes memory args) {
+            return args;
+        } catch {
+            return "";
+        }
+    }
+
+    function deployContract(string memory contractName, bytes memory args)
+        internal
+        returns (address)
+    {
+        if (args.length == 0) {
+            return deployCode(contractName);
+        } else {
+            return deployCode(contractName, args);
+        }
+    }
 }