542 lines
19 KiB
Rust
542 lines
19 KiB
Rust
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/*
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* Copyright 2024 Luca Fulchir <luca.fulchir@runesauth.com>
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*
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* Licensed under the Apache License, Version 2.0 with LLVM exception (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License and of the exception at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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* https://spdx.org/licenses/LLVM-exception.html
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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use ::proc_macro::TokenStream;
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use ::quote::quote;
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use ::syn::{parse::Parser, parse_macro_input, DeriveInput};
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pub(crate) fn pkg_fn_to_code(
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_attrs: TokenStream,
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input: TokenStream,
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) -> TokenStream {
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let mut ast_orig: ::syn::ItemFn =
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parse_macro_input!(input as ::syn::ItemFn);
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let mut ast_new = ast_orig.clone();
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ast_new.block = ast_orig.block.clone();
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// Add a prefix and suffix statement
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// where we declare and return the result
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let prefix_ret: ::syn::Stmt = ::syn::parse_quote! {
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let mut ret : ::core::result::Result<(),()> = ::core::result::Result::Err(());
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};
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let suffix_ret: ::syn::Stmt = ::syn::parse_quote! {
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return ret;
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};
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ast_orig.block.stmts.insert(0, prefix_ret);
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ast_orig.block.stmts.push(suffix_ret);
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let new_fn_name =
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quote::format_ident!("{}", ast_orig.sig.ident.to_string() + "_code");
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ast_new.sig.ident = quote::format_ident!("{}", new_fn_name);
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use ::quote::ToTokens;
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let fn_block = ast_new.block.to_token_stream();
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let asdf = quote! {
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#ast_orig
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fn #new_fn_name (&self) -> ::proc_macro2::TokenStream {
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::quote::quote! #fn_block
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}
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};
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asdf.into()
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}
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pub(crate) fn package(attrs: TokenStream, input: TokenStream) -> TokenStream {
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let mut ast = parse_macro_input!(input as DeriveInput);
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match &mut ast.data {
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syn::Data::Struct(ref mut struct_data) => {
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match &mut struct_data.fields {
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syn::Fields::Named(fields) => {
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let base = proc_macro2::TokenStream::from(attrs);
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fields.named.push(
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syn::Field::parse_named
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.parse2(quote! { base: #base })
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.unwrap(),
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);
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fields.named.push(
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syn::Field::parse_named
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.parse2(quote! { version: ::bok::Version })
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.unwrap(),
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);
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}
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_ => (),
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}
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quote! {
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#[derive(::bok::Package,::std::fmt::Debug, Clone)]
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#ast
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}
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.into()
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}
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_ => panic!("`package` has to be used with a struct"),
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}
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}
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pub(crate) fn impl_package(
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_attrs: TokenStream,
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input: TokenStream,
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) -> TokenStream {
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let mut ast = parse_macro_input!(input as ::syn::ItemImpl);
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let name_pkg = match &*ast.self_ty {
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::syn::Type::Path(tp) => match tp.path.get_ident() {
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Some(id) => id.clone(),
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_ => panic!("impl_package expected path ident"),
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},
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_ => panic!("impl_package expected path"),
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};
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let name: ::syn::ImplItem = ::syn::parse_quote! {
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fn name(&self) -> ::bok::PkgName {
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(module_path!().to_owned() + "::" + ::std::stringify!(#name_pkg)).as_str().into()
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}
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};
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let path: ::syn::ImplItem = ::syn::parse_quote! {
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fn path(&self) -> ::bok::Path<::bok::PkgName> {
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(module_path!().to_owned() + "::" + ::std::stringify!(#name_pkg)).as_str().into()
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}
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};
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let version: ::syn::ImplItem = ::syn::parse_quote! {
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fn version(&self) -> ::bok::Version {
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self.version.clone()
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}
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};
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let base: ::syn::ImplItem = ::syn::parse_quote! {
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fn base(&self) -> ::core::option::Option<&dyn ::bok::Pkg> {
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Some(&self.base)
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}
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};
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let base_mut: ::syn::ImplItem = ::syn::parse_quote! {
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fn base_mut(&mut self) -> ::core::option::Option<&mut dyn ::bok::Pkg> {
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Some(&mut self.base)
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}
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};
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let any: ::syn::ImplItem = ::syn::parse_quote! {
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fn as_any(&self) -> &dyn ::std::any::Any {
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self
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}
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};
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let any_mut: ::syn::ImplItem = ::syn::parse_quote! {
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fn as_any_mut(&mut self) -> &mut dyn ::std::any::Any {
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self
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}
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};
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let hash: ::syn::ImplItem = ::syn::parse_quote! {
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fn hash(&self) -> ::bok::Hash {
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use ::sha3::{Digest};
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let mut hasher = ::sha3::Sha3_256::new();
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let mut pkg_vars = String::new();
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use ::std::fmt::Write;
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write!(&mut pkg_vars,
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"{:?}",
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self,
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).ok();
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hasher.update(&pkg_vars);
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hasher.update(self.to_string());
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let hash = hasher.finalize();
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::bok::Hash::Sha3(hash)
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}
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};
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let hash_code: ::syn::ImplItem = ::syn::parse_quote! {
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fn hash_code(&self) -> ::bok::Hash {
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use ::sha3::{Digest};
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let mut hasher = ::sha3::Sha3_256::new();
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hasher.update(self.to_string());
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let hash = hasher.finalize();
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::bok::Hash::Sha3(hash)
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}
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};
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for mut impl_item in ast.items.iter_mut() {
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if let ::syn::ImplItem::Fn(ref mut fn_impl) = &mut impl_item {
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if fn_impl.sig.ident.to_string() == "dependencies_set" {
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continue;
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}
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let fn_with_code: ::syn::ImplItemFn = ::syn::parse_quote! {
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#[::bok::pkg_fn_to_code]
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#fn_impl
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};
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*fn_impl = fn_with_code;
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} else {
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panic!("wtf");
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}
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}
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ast.items.push(name);
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ast.items.push(path);
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ast.items.push(version);
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ast.items.push(base);
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ast.items.push(base_mut);
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ast.items.push(any);
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ast.items.push(any_mut);
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ast.items.push(hash);
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ast.items.push(hash_code);
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quote! {
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#ast
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}
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.into()
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}
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pub(crate) fn derive_package(input: TokenStream) -> TokenStream {
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let input = parse_macro_input!(input as DeriveInput);
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let mut input_nobase = input.clone();
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let name = input.ident.clone();
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let name_builder = quote::format_ident!("{name}Builder");
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let name_builder2 = name_builder.clone();
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let name_builder3 = name_builder.clone();
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let elements = match input.data {
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::syn::Data::Struct(s) => match s.fields {
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syn::Fields::Named(n) => n.named,
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_ => panic!("only named supported"),
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},
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_ => panic!("only struct allowed"),
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};
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let all_fields = elements.iter().filter_map(|field| {
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if let Some(id) = field.ident.clone() {
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if id.to_string() != "base" && id.to_string() != "version" {
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return Some(&field.ident);
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}
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}
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None
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});
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let all_fields2 = all_fields.clone();
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let all_fields3 = all_fields.clone();
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let all_fields_mut = elements.iter().filter_map(|field| {
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if let Some(id) = field.ident.clone() {
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if id.to_string() != "base" && id.to_string() != "version" {
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return Some(quote::format_ident!("{}_mut", id.to_string()));
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}
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}
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None
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});
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let base_type = elements
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.iter()
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.find_map(|field| {
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if let Some(id) = field.ident.clone() {
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if id.to_string() == "base" {
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return Some(&field.ty);
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}
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}
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None
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})
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.expect("expected a base type");
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let all_types = elements.iter().filter_map(|field| {
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if let Some(id) = field.ident.clone() {
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if id.to_string() != "base" && id.to_string() != "version" {
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return Some(&field.ty);
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}
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}
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None
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});
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let all_types2 = all_types.clone();
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let non_opt_fields = elements.iter().filter_map(|field| {
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if let Some(id) = field.ident.clone() {
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if id.to_string() == "base" || id.to_string() == "version" {
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return None;
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}
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}
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match &field.ty {
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syn::Type::Path(pth) => {
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let first_path = pth.path.segments.first().unwrap();
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if first_path.ident == "Option" {
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None
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} else {
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let id = &field.ident;
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Some(quote! {#id})
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}
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}
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t => Some(quote! {#t}),
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}
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});
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let opt_fields = elements.iter().filter_map(|field| {
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if let Some(id) = field.ident.clone() {
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if id.to_string() == "base" || id.to_string() == "version" {
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return None;
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}
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}
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match &field.ty {
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syn::Type::Path(pth) => {
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let first_path = pth.path.segments.first().unwrap();
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if first_path.ident == "Option" {
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let id = &field.ident;
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Some(quote! {#id})
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} else {
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None
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}
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}
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_ => None,
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}
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});
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let non_opt_types = elements.iter().filter_map(|field| {
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if let Some(id) = field.ident.clone() {
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if id.to_string() == "base" || id.to_string() == "version" {
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return None;
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}
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}
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match &field.ty {
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syn::Type::Path(pth) => {
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let first_path = pth.path.segments.first().unwrap();
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if first_path.ident == "Option" {
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None
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} else {
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let t = &field.ty;
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Some(quote! {#t})
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}
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}
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_ => None,
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}
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});
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let opt_types = elements.iter().filter_map(|field| {
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if let Some(id) = field.ident.clone() {
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if id.to_string() == "base" || id.to_string() == "version" {
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return None;
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}
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}
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if let ::syn::Type::Path(pth) = &field.ty {
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let first_path = pth.path.segments.first().unwrap();
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if first_path.ident == "Option" {
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if let syn::PathArguments::AngleBracketed(
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syn::AngleBracketedGenericArguments { args, .. },
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) = &first_path.arguments
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{
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if let Some(syn::GenericArgument::Type(syn::Type::Path(
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p,
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))) = args.first()
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{
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let id = &p.path.segments.first().unwrap().ident;
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return Some(quote! {#id});
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}
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}
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}
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}
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None
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});
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let non_opt_fields2 = non_opt_fields.clone();
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let non_opt_fields3 = non_opt_fields.clone();
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let non_opt_fields4 = non_opt_fields.clone();
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let non_opt_fields5 = non_opt_fields.clone();
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let opt_fields2 = opt_fields.clone();
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let opt_fields3 = opt_fields.clone();
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let opt_types2 = opt_types.clone();
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let non_opt_types2 = non_opt_types.clone();
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{
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// remove the `base` field from the struct
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let ::syn::Data::Struct(ref mut ds) = input_nobase.data else {
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panic!("::bok::package expected a struct");
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};
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let ::syn::Fields::Named(ref mut old_nf) = ds.fields else {
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panic!("::bok::package expected a named field");
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};
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let mut new_nf = ::syn::punctuated::Punctuated::<
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::syn::Field,
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::syn::token::Comma,
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>::new();
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for f in old_nf.named.iter() {
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if let Some(ref id) = f.ident {
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if id.to_string() == "base" {
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continue;
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}
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}
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new_nf.push(f.clone());
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}
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old_nf.named = new_nf;
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}
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let pkg_struct = quote! {
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#input_nobase
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};
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let mut pkg_struct_str = String::new();
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|
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{
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use ::core::fmt::Write;
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write!(&mut pkg_struct_str, "{}", pkg_struct)
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|
.expect("can't write package struct into string");
|
||
|
|
}
|
||
|
|
|
||
|
|
let expanded = quote! {
|
||
|
|
impl ::core::fmt::Display for #name {
|
||
|
|
fn fmt(&self, f: &mut ::core::fmt::Formatter<'_>)
|
||
|
|
->::core::fmt::Result
|
||
|
|
{
|
||
|
|
<#name as ::bok::PkgCode>::fmt(self, f)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
impl ::bok::PkgCode for #name {
|
||
|
|
fn fmt(&self, f: &mut ::core::fmt::Formatter<'_>)
|
||
|
|
->::core::fmt::Result
|
||
|
|
{
|
||
|
|
// FIXME: this sounds convoluted.
|
||
|
|
// first we turn everything into a string, then we
|
||
|
|
// parse the string into tokenstream again to format it
|
||
|
|
// reason: the `prettyplease` works on `::syn::File`
|
||
|
|
// and I can't find an easy translation
|
||
|
|
// `TokenStream2 -> TokenStream`
|
||
|
|
use ::bok::Pkg;
|
||
|
|
|
||
|
|
// don't add a method if it is just the base Trait implementation
|
||
|
|
fn maybe_add_fn(out: &mut String, name: &str, fn_str: &str) -> ::core::fmt::Result {
|
||
|
|
|
||
|
|
let str_base = "self . base () . unwrap () . ".to_owned() + name + " ()";
|
||
|
|
|
||
|
|
if fn_str.trim() != str_base {
|
||
|
|
use ::core::fmt::Write;
|
||
|
|
|
||
|
|
write!(out,
|
||
|
|
"\
|
||
|
|
fn {}(&self) -> Result<(), ()> {{\n\
|
||
|
|
{}\n\
|
||
|
|
}}\n",
|
||
|
|
name,
|
||
|
|
fn_str,
|
||
|
|
)
|
||
|
|
|
||
|
|
} else {
|
||
|
|
::core::fmt::Result::Ok(())
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
use ::core::fmt::Write;
|
||
|
|
|
||
|
|
let pkg_empty = ::bok::PkgEmpty::default();
|
||
|
|
let mut pkg_string = String::new();
|
||
|
|
write!(&mut pkg_string,
|
||
|
|
"#[::bok::package({})]\n\
|
||
|
|
{}",
|
||
|
|
::std::stringify!(#base_type),
|
||
|
|
#pkg_struct_str)?;
|
||
|
|
write!(&mut pkg_string,
|
||
|
|
"#[::bok::impl_package]\n\
|
||
|
|
impl ::bok::Pkg for {} {{\n",
|
||
|
|
::std::stringify!(#name)
|
||
|
|
)?;
|
||
|
|
maybe_add_fn(&mut pkg_string, "prepare", &self.prepare_code().to_string())?;
|
||
|
|
maybe_add_fn(&mut pkg_string, "configure", &self.configure_code().to_string())?;
|
||
|
|
maybe_add_fn(&mut pkg_string, "build", &self.build_code().to_string())?;
|
||
|
|
maybe_add_fn(&mut pkg_string, "check", &self.check_code().to_string())?;
|
||
|
|
maybe_add_fn(&mut pkg_string, "install", &self.install_code().to_string())?;
|
||
|
|
write!(&mut pkg_string, "}}\n")?;
|
||
|
|
let re_parsed = ::syn::parse_file(&pkg_string).unwrap();
|
||
|
|
let formatted = prettyplease::unparse(&re_parsed);
|
||
|
|
f.write_str(&formatted)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
impl #name {
|
||
|
|
pub fn as_pkg(&self) -> &dyn ::bok::Pkg {
|
||
|
|
self
|
||
|
|
}
|
||
|
|
pub fn as_pkg_mut(&mut self) -> &mut dyn ::bok::Pkg {
|
||
|
|
self
|
||
|
|
}
|
||
|
|
pub fn builder() -> #name_builder {
|
||
|
|
#name_builder::default()
|
||
|
|
}
|
||
|
|
#(pub fn #all_fields2(&self) -> &#all_types {
|
||
|
|
&self.#all_fields2
|
||
|
|
})*
|
||
|
|
#(pub fn #all_fields_mut(&mut self) -> &#all_types2 {
|
||
|
|
&mut self.#all_fields3
|
||
|
|
})*
|
||
|
|
}
|
||
|
|
#[derive(::std::default::Default, ::std::fmt::Debug)]
|
||
|
|
pub struct #name_builder {
|
||
|
|
#(#non_opt_fields: ::std::option::Option<#non_opt_types>,)*
|
||
|
|
#(#opt_fields: ::std::option::Option<#opt_types>,)*
|
||
|
|
}
|
||
|
|
/*
|
||
|
|
impl ::std::ops::Deref for #name_builder {
|
||
|
|
type Target = #base_type;
|
||
|
|
fn deref(&self) -> &#base_type {
|
||
|
|
&self.base
|
||
|
|
}
|
||
|
|
}
|
||
|
|
*/
|
||
|
|
impl ::bok::PkgBuilder for #name_builder2 {
|
||
|
|
fn name(&self) -> ::bok::PkgName {
|
||
|
|
use ::bok::Pkg;
|
||
|
|
#name::default().name()
|
||
|
|
}
|
||
|
|
fn path(&self) -> ::bok::Path<::bok::PkgName> {
|
||
|
|
use ::bok::Pkg;
|
||
|
|
#name::default().path()
|
||
|
|
}
|
||
|
|
fn version(&self) -> ::bok::Version {
|
||
|
|
use ::bok::Pkg;
|
||
|
|
#name::default().version()
|
||
|
|
}
|
||
|
|
fn default_unused(&mut self) -> &mut dyn ::bok::PkgBuilder {
|
||
|
|
let def = #name::default();
|
||
|
|
#(if self.#non_opt_fields5.is_none() {
|
||
|
|
self.#non_opt_fields5 = Some(def.#non_opt_fields5);
|
||
|
|
})*
|
||
|
|
|
||
|
|
self
|
||
|
|
}
|
||
|
|
fn build(&mut self) -> Result<Box<dyn ::bok::Pkg>, ::std::boxed::Box<dyn ::std::error::Error>> {
|
||
|
|
#(if self.#non_opt_fields2.is_none() {
|
||
|
|
return ::std::result::Result::Err("unset field".into());
|
||
|
|
})*
|
||
|
|
Ok(
|
||
|
|
Box::new(#name {
|
||
|
|
// FIXME: user must be able to override. Trait?
|
||
|
|
base: #base_type::default(),
|
||
|
|
version: #name::default().version,
|
||
|
|
#(#non_opt_fields3 : self.#non_opt_fields3.clone().unwrap(),)*
|
||
|
|
#(#opt_fields2 : self.#opt_fields2.clone(),)*
|
||
|
|
})
|
||
|
|
)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
impl #name_builder3 {
|
||
|
|
pub fn as_any(&self) -> &dyn ::std::any::Any {
|
||
|
|
self
|
||
|
|
}
|
||
|
|
pub fn as_any_mut(&mut self) -> &mut dyn ::std::any::Any {
|
||
|
|
self
|
||
|
|
}
|
||
|
|
pub fn as_builder(&self) -> &dyn ::bok::PkgBuilder {
|
||
|
|
self
|
||
|
|
}
|
||
|
|
pub fn as_builder_mut(&mut self) -> &mut dyn ::bok::PkgBuilder {
|
||
|
|
self
|
||
|
|
}
|
||
|
|
#(pub fn #non_opt_fields4 (&mut self, val : #non_opt_types2) -> &mut Self {
|
||
|
|
if self.#non_opt_fields4 != None &&
|
||
|
|
self.#non_opt_fields4 != Some(val) {
|
||
|
|
panic!("Package \"{}\": mandatory attribute set multiple times: \"{}\"",
|
||
|
|
::std::stringify!(#name),
|
||
|
|
::std::stringify!(#non_opt_fields4));
|
||
|
|
}
|
||
|
|
self.#non_opt_fields4 = Some(val);
|
||
|
|
self
|
||
|
|
})*
|
||
|
|
#(pub fn #opt_fields3 (&mut self, val : #opt_types2) -> &mut Self {
|
||
|
|
if self.#opt_fields3 != None &&
|
||
|
|
self.#opt_fields3 != Some(val) {
|
||
|
|
panic!("Package \"{}\": optional attribute set multiple times: \"{}\"",
|
||
|
|
::std::stringify!(#name),
|
||
|
|
::std::stringify!(#opt_fields3));
|
||
|
|
}
|
||
|
|
self.#opt_fields3 = Some(val);
|
||
|
|
self
|
||
|
|
})*
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
TokenStream::from(expanded)
|
||
|
|
}
|