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codegen: Add codegen error (#841)

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* codegen: Add codegen error

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* codegen: Use codegen error instead of aborts

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* codegen: Remove `proc-macro-error` dependency

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* macro/subxt: Transform codegen error into compile_error!

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* cli: Pretty printing for `CodegenError`

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Update cargo.lock

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* tests: Adjust testing for codegen error

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* codegen: Fix documentation example

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* codegen: Export `CodegenError`

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* codegen: Use collect::<Result<_>, _>()

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* cli: Adjust comment regarding error printing

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* codegen: Improve error messages

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

---------

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>
This commit is contained in:
Alexandru Vasile
2023-03-03 19:57:46 +02:00
committed by GitHub
parent 5320ca9d55
commit a7b45ef1d1
18 changed files with 405 additions and 322 deletions
Download Patch File Download Diff File Expand all files Collapse all files
codegen/src/api/constants.rs
+12 -10
View File
@@ -12,13 +12,14 @@ use frame_metadata::{
};
use heck::ToSnakeCase as _;
use proc_macro2::TokenStream as TokenStream2;
use proc_macro_error::abort_call_site;
use quote::{
format_ident,
quote,
};
use scale_info::form::PortableForm;
use super::CodegenError;
/// Generate constants from the provided pallet's metadata.
///
/// The function creates a new module named `constants` under the pallet's module.
@@ -49,10 +50,10 @@ pub fn generate_constants(
types_mod_ident: &syn::Ident,
crate_path: &CratePath,
should_gen_docs: bool,
) -> TokenStream2 {
) -> Result<TokenStream2, CodegenError> {
// Early return if the pallet has no constants.
if pallet.constants.is_empty() {
return quote!()
return Ok(quote!())
}
let constants = &pallet.constants;
@@ -60,8 +61,9 @@ pub fn generate_constants(
let fn_name = format_ident!("{}", constant.name.to_snake_case());
let pallet_name = &pallet.name;
let constant_name = &constant.name;
let constant_hash = subxt_metadata::get_constant_hash(metadata, pallet_name, constant_name)
.unwrap_or_else(|_| abort_call_site!("Metadata information for the constant {}_{} could not be found", pallet_name, constant_name));
let Ok(constant_hash) = subxt_metadata::get_constant_hash(metadata, pallet_name, constant_name) else {
return Err(CodegenError::MissingConstantMetadata(constant_name.into(), pallet_name.into()));
};
let return_ty = type_gen.resolve_type_path(constant.ty.id());
let docs = &constant.docs;
@@ -69,7 +71,7 @@ pub fn generate_constants(
.then_some(quote! { #( #[doc = #docs ] )* })
.unwrap_or_default();
quote! {
Ok(quote! {
#docs
pub fn #fn_name(&self) -> #crate_path::constants::StaticConstantAddress<#crate_path::metadata::DecodeStaticType<#return_ty>> {
#crate_path::constants::StaticConstantAddress::new(
@@ -78,10 +80,10 @@ pub fn generate_constants(
[#(#constant_hash,)*]
)
}
}
});
})
}).collect::<Result<Vec<_>, _>>()?;
quote! {
Ok(quote! {
pub mod constants {
use super::#types_mod_ident;
@@ -91,5 +93,5 @@ pub fn generate_constants(
#(#constant_fns)*
}
}
}
})
}