avoid iam ops if iam role file is in install

build.zig

@@ -61,7 +61,8 @@ pub fn build(b: *std.build.Builder) !void {
             // directory to be used later
             const iam_role_name_file = b.getInstallPath(exe.install_step.?.dest_dir, "iam_role_name");
             iam_role = try std.fmt.allocPrint(b.allocator, "--role $(cat {s})", .{iam_role_name_file});
-
+            // defer b.allocator.free(iam_role);
+            if (!fileExists(iam_role_name_file)) {
                 // Role get/creation command
                 const ifstatement_fmt =
                     \\ if aws iam get-role --role-name lambda_basic_execution 2>&1 |grep -q NoSuchEntity; then aws iam create-role --output text --query Role.Arn --role-name lambda_basic_execution --assume-role-policy-document '{
@@ -84,6 +85,7 @@ pub fn build(b: *std.build.Builder) !void {
                 defer b.allocator.free(ifstatement);
                 iam_step.dependOn(&b.addSystemCommand(&.{ "/bin/sh", "-c", ifstatement }).step);
             }
+        }
         const function_name = b.option([]const u8, "function-name", "Function name for Lambda [zig-fn]") orelse "zig-fn";
         const ifstatement = "if aws lambda get-function --function-name {s} 2>&1 |grep -q ResourceNotFoundException; then echo not found > /dev/null; {s}; else echo found > /dev/null; {s}; fi";
         // The architectures option was introduced in 2.2.43 released 2021-10-01
@@ -117,6 +119,7 @@ pub fn build(b: *std.build.Builder) !void {
         const run_script =
             \\ f=$(mktemp) && \
             \\ logs=$(aws lambda invoke \
+            \\          --invocation-type RequestResponse \
             \\          --function-name {s} \
             \\          --payload $(echo '{s}'|base64) \
             \\          --log-type Tail \
@@ -137,7 +140,11 @@ pub fn build(b: *std.build.Builder) !void {
         run_step.dependOn(&run_cmd.step);
     }
 }
-
+fn fileExists(file_name: []const u8) bool {
+    const file = std.fs.openFileAbsolute(file_name, .{}) catch return false;
+    defer file.close();
+    return true;
+}
 fn addArgs(allocator: *std.mem.Allocator, original: []const u8, args: [][]const u8) ![]const u8 {
     var rc = original;
     for (args) |arg| {