Allow unused imports in generated code

src/generator.rs

@@ -401,7 +401,8 @@ pub fn generate_rust_code(
         let rust_file_name = format!("{}.rs", proto_name.replace(".proto", ""));
 
         let mut output = String::new();
-        output.push_str("// @generated by protoc-gen-roto — do not edit\n\n");
+        output.push_str("// @generated by protoc-gen-roto — do not edit\n");
+        output.push_str("#![allow(unused_imports)]\n\n");
         output.push_str("use crate::{ProtoAccessor, ProtoBuilder, Result, RotoError, read_varint, RepeatedFieldIterator};\n");
         output.push_str("use std::str;\n\n");
 
@@ -462,7 +463,8 @@ pub fn generate_rust_code(
     }
 
     let mut root_mod_content = String::new();
-    root_mod_content.push_str("// @generated by protoc-gen-roto — do not edit\n\n");
+    root_mod_content.push_str("// @generated by protoc-gen-roto — do not edit\n");
+    root_mod_content.push_str("#![allow(unused_imports)]\n\n");
     let mut sorted_root_mods: Vec<_> = root_mods.into_iter().collect();
     sorted_root_mods.sort();
     for m in sorted_root_mods {
@@ -472,7 +474,8 @@ pub fn generate_rust_code(
 
     for (mod_path, sub_mods) in mod_files {
         let mut content = String::new();
-        content.push_str("// @generated by protoc-gen-roto — do not edit\n\n");
+        content.push_str("// @generated by protoc-gen-roto — do not edit\n");
+        content.push_str("#![allow(unused_imports)]\n\n");
         let mut sorted_subs: Vec<_> = sub_mods.into_iter().collect();
         sorted_subs.sort();
         for sub in sorted_subs {

src/google/protobuf/compiler/plugin.rs

@@ -1,4 +1,5 @@
 // @generated by protoc-gen-roto — do not edit
+#![allow(unused_imports)]
 
 use crate::{ProtoAccessor, ProtoBuilder, Result, RotoError, read_varint, RepeatedFieldIterator};
 use std::str;

src/google/protobuf/descriptor.rs

@@ -1,4 +1,5 @@
 // @generated by protoc-gen-roto — do not edit
+#![allow(unused_imports)]
 
 use crate::{ProtoAccessor, ProtoBuilder, Result, RotoError, read_varint, RepeatedFieldIterator};
 use std::str;

src/hackers.rs

@@ -1,4 +1,5 @@
 // @generated by protoc-gen-roto — do not edit
+#![allow(unused_imports)]
 
 use crate::{ProtoAccessor, ProtoBuilder, Result, RotoError, read_varint, RepeatedFieldIterator};
 use std::str;