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//! `include_server_schema!` composer — emits the full server surface:
//! sqlx Postgres backend, `Cratestack` runtime, axum router, procedure
//! handlers, events. No rusqlite anywhere in the output.
mod axum_dtos;
mod axum_module;
mod collect;
mod grpc;
mod rpc_module;
mod runtime;
use proc_macro::TokenStream;
use quote::quote;
use syn::LitStr;
use super::parse::{ServerDb, parse_schema_literal};
use collect::collect_server_schema;
pub(super) fn compose_server_schema(schema_path: &LitStr, db: ServerDb) -> TokenStream {
let (schema_relative, resolved, schema, schema_sha256) = match parse_schema_literal(schema_path)
{
Ok(parsed) => parsed,
Err(error) => return error,
};
if let Err(error) =
super::datasource_guard::guard_server_datasource_provider(schema_path, &schema, db)
{
return error;
}
if let Err(error) = super::datasource_guard::guard_server_postgres_backend(schema_path, db) {
return error;
}
if let Err(error) = super::reject_grpc::guard_server_grpc_transport(schema_path, &schema) {
return error;
}
if let Err(error) =
super::extension_gate::guard_server_declared_extensions(schema_path, &schema)
{
return error;
}
let resolved_literal = resolved.display().to_string();
let collected = match collect_server_schema(&schema, schema_path) {
Ok(collected) => collected,
Err(error) => return error,
};
let grpc_module = match grpc::build_grpc_module(&schema, &resolved, schema_path) {
Ok(tokens) => tokens,
Err(error) => return error,
};
let axum_module = axum_module::build_axum_module(&collected, db);
let runtime_block = runtime::build_runtime_block(
db,
&collected.model_accessors,
&collected.bound_model_accessors,
&collected.view_accessors,
);
// Destructure here for `quote!` interpolation — quoting through the
// struct adds a `c.` prefix per field, which `quote!` doesn't accept.
let collect::ServerCollected {
transport_style_str,
mixin_names,
model_names,
type_names,
enum_names,
procedure_names,
view_names,
type_structs,
enum_types,
custom_field_descriptors,
custom_field_resolver_methods,
model_structs,
pg_from_row_impls,
primary_key_accessor_impls,
model_descriptors,
field_modules,
create_input_structs,
update_input_structs,
upsert_input_impls,
find_many_input_structs,
view_structs,
view_descriptors,
view_pg_from_row_impls,
procedure_modules,
procedure_registry_methods,
generated_client_module,
generated_event_module,
..
} = collected;
// `datasource { provider = "none" }` schemas can never declare a
// `model` (cratestack#327's guard), so `generated_event_module` is
// always an empty-bodied `pub mod events { ... }` shell under
// `db = None` — a `Subscriptions::new` that nothing in the crate ever
// calls (there is no `Cratestack::events()` accessor for `db = None`;
// see `runtime::none`'s module doc), which would trip `dead_code`
// under this workspace's `-D warnings` gate. Drop it entirely instead
// of keeping it as unreachable API surface.
let generated_event_module = match db {
ServerDb::Postgres => generated_event_module,
ServerDb::None => proc_macro2::TokenStream::new(),
};
// `datasource { provider = "none" }` schemas can never declare a
// `model` either, so `pg_from_row_impls`/`model_structs`/etc. below
// are always empty under `db = None` — but the `use ::cratestack::sqlx;`
// import itself would still fail to resolve once `sqlx`/`cratestack-sqlx`
// is Cargo-feature-gated behind the (default-on) `postgres` feature
// (cratestack#329) and a `db = None`-only consumer disables it. Only
// pull the import in for `db = Postgres`, where it's actually needed
// for the sqlx `FromRow` impls in this same module.
let models_sqlx_import = match db {
ServerDb::Postgres => quote! { use ::cratestack::sqlx; },
ServerDb::None => proc_macro2::TokenStream::new(),
};
let expanded = quote! {
pub mod cratestack_schema {
pub const SCHEMA_PATH: &str = #schema_relative;
pub const SCHEMA_SOURCE: &str = include_str!(#resolved_literal);
/// Hex-encoded SHA-256 of `SCHEMA_SOURCE`'s raw bytes, computed
/// once at macro-expansion time. Not cryptographic-strength
/// integrity — it's a drift-detection fingerprint: `axum::router()`
/// below layers on middleware that compares a client-sent copy of
/// this value against its own and `tracing::warn!`s on mismatch,
/// never rejects. See issue #178.
pub const SCHEMA_SHA256: &str = #schema_sha256;
pub const MIXINS: &[&str] = &[#(#mixin_names),*];
pub const MODELS: &[&str] = &[#(#model_names),*];
pub const TYPES: &[&str] = &[#(#type_names),*];
pub const ENUMS: &[&str] = &[#(#enum_names),*];
pub const PROCEDURES: &[&str] = &[#(#procedure_names),*];
pub const VIEWS: &[&str] = &[#(#view_names),*];
pub const MIXIN_COUNT: usize = MIXINS.len();
pub const MODEL_COUNT: usize = MODELS.len();
pub const TYPE_COUNT: usize = TYPES.len();
pub const ENUM_COUNT: usize = ENUMS.len();
pub const PROCEDURE_COUNT: usize = PROCEDURES.len();
pub const VIEW_COUNT: usize = VIEWS.len();
/// Generation style the schema declared via the `transport`
/// directive. Either `"rest"` (the default) or `"rpc"`. See
/// `docs/design/rpc-transport.md`.
pub const TRANSPORT_STYLE: &str = #transport_style_str;
pub mod types {
use ::cratestack::serde;
#(#enum_types)*
#(#type_structs)*
}
pub use types::*;
pub mod models {
use ::cratestack::serde;
#models_sqlx_import
#(#model_structs)*
#(#pg_from_row_impls)*
#(#primary_key_accessor_impls)*
#(#model_descriptors)*
// View emission (ADR-0003) lives alongside models in
// the same `models` module so the view structs share
// the same scope as the source models they were
// declared `from`. The `runtime.views().<view>()`
// accessor reaches into `super::models::<View>` to
// construct the `ViewDelegate`.
#(#view_structs)*
#(#view_pg_from_row_impls)*
#(#view_descriptors)*
}
pub use models::*;
#(#field_modules)*
pub mod inputs {
use ::cratestack::serde;
#(#create_input_structs)*
#(#update_input_structs)*
#(#upsert_input_impls)*
#(#find_many_input_structs)*
}
pub use inputs::*;
#generated_client_module
#generated_event_module
pub mod procedures {
#(#procedure_modules)*
pub trait ProcedureRegistry: Clone + Send + Sync + 'static {
#(#procedure_registry_methods)*
}
}
pub mod custom {
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub struct CustomFieldDescriptor {
pub owner: &'static str,
pub field: &'static str,
pub resolver_method: &'static str,
}
pub const FIELDS: &[CustomFieldDescriptor] = &[
#(#custom_field_descriptors),*
];
pub const FIELD_COUNT: usize = FIELDS.len();
pub trait CustomFieldResolver: Clone + Send + Sync + 'static {
#(#custom_field_resolver_methods)*
}
}
pub use custom::CustomFieldResolver;
pub const CUSTOM_FIELDS: &[custom::CustomFieldDescriptor] = custom::FIELDS;
pub const CUSTOM_FIELD_COUNT: usize = custom::FIELD_COUNT;
#axum_module
#runtime_block
#grpc_module
}
};
expanded.into()
}