expose default typegen settings

codegen/src/api/mod.rs

@@ -14,16 +14,16 @@ mod storage;
 
 use scale_typegen::typegen::ir::type_ir::CompositeIR;
 use scale_typegen::typegen::type_params::TypeParameters;
-use scale_typegen::{TypeGenerator, TypeGeneratorSettings};
+use scale_typegen::TypeGenerator;
 use subxt_metadata::Metadata;
 
 use crate::error::CodegenError;
+use crate::subxt_type_gen_settings;
 use crate::{api::custom_values::generate_custom_values, ir};
 
 use heck::ToSnakeCase as _;
 use proc_macro2::TokenStream as TokenStream2;
 use quote::{format_ident, quote};
-use syn::parse_quote;
 
 /// Create the API for interacting with a Substrate runtime.
 pub struct RuntimeGenerator {
@@ -321,24 +321,6 @@ impl RuntimeGenerator {
     }
 }
 
-fn subxt_type_gen_settings(
-    derives: scale_typegen::DerivesRegistry,
-    substitutes: scale_typegen::TypeSubstitutes,
-    crate_path: &syn::Path,
-    should_gen_docs: bool,
-) -> TypeGeneratorSettings {
-    TypeGeneratorSettings {
-        types_mod_ident: parse_quote!(runtime_types),
-        should_gen_docs,
-        derives,
-        substitutes,
-        decoded_bits_type_path: Some(parse_quote!(#crate_path::utils::bits::DecodedBits)),
-        compact_as_type_path: Some(parse_quote!(#crate_path::ext::codec::CompactAs)),
-        compact_type_path: Some(parse_quote!(#crate_path::ext::codec::Compact)),
-        insert_codec_attributes: true,
-    }
-}
-
 /// Return a vector of tuples of variant names and corresponding struct definitions.
 pub fn generate_structs_from_variants<F>(
     type_gen: &TypeGenerator,

codegen/src/lib.rs

@@ -24,7 +24,8 @@ use getrandom as _;
 use api::RuntimeGenerator;
 use proc_macro2::TokenStream as TokenStream2;
 use scale_typegen::{
-    typegen::settings::substitutes::absolute_path, DerivesRegistry, TypeSubstitutes, TypegenError,
+    typegen::settings::substitutes::absolute_path, DerivesRegistry, TypeGeneratorSettings,
+    TypeSubstitutes, TypegenError,
 };
 use std::collections::HashMap;
 use syn::parse_quote;
@@ -290,6 +291,33 @@ impl CodegenBuilder {
     }
 }
 
+/// The default [`scale_typegen::TypeGeneratorSettings`], subxt is using for generating code.
+/// Useful for emulating subxt's code generation settings from e.g. subxt-explorer.
+pub fn default_subxt_type_gen_settings() -> TypeGeneratorSettings {
+    let crate_path: syn::Path = parse_quote!(::subxt);
+    let derives = default_derives(&crate_path);
+    let substitutes = default_substitutes(&crate_path);
+    subxt_type_gen_settings(derives, substitutes, &crate_path, true)
+}
+
+fn subxt_type_gen_settings(
+    derives: scale_typegen::DerivesRegistry,
+    substitutes: scale_typegen::TypeSubstitutes,
+    crate_path: &syn::Path,
+    should_gen_docs: bool,
+) -> TypeGeneratorSettings {
+    TypeGeneratorSettings {
+        types_mod_ident: parse_quote!(runtime_types),
+        should_gen_docs,
+        derives,
+        substitutes,
+        decoded_bits_type_path: Some(parse_quote!(#crate_path::utils::bits::DecodedBits)),
+        compact_as_type_path: Some(parse_quote!(#crate_path::ext::codec::CompactAs)),
+        compact_type_path: Some(parse_quote!(#crate_path::ext::codec::Compact)),
+        insert_codec_attributes: true,
+    }
+}
+
 fn default_derives(crate_path: &syn::Path) -> DerivesRegistry {
     let encode_crate_path = quote::quote! { #crate_path::ext::scale_encode }.to_string();
     let decode_crate_path = quote::quote! { #crate_path::ext::scale_decode }.to_string();