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|
use std::collections::HashMap;
use protobuf::descriptor::file_options;
use protobuf::descriptor::FileDescriptorProto;
use protobuf::reflect::FileDescriptor;
use protobuf_parse::ProtoPath;
use crate::compiler_plugin;
use crate::customize::ctx::CustomizeElemCtx;
use crate::customize::rustproto_proto::customize_from_rustproto_for_file;
use crate::gen::code_writer::CodeWriter;
use crate::gen::enums::EnumGen;
use crate::gen::extensions::write_extensions;
use crate::gen::file_descriptor::write_file_descriptor_data;
use crate::gen::inside::protobuf_crate_path;
use crate::gen::message::MessageGen;
use crate::gen::paths::proto_path_to_rust_mod;
use crate::gen::scope::FileScope;
use crate::gen::scope::RootScope;
use crate::proto_name_to_rs;
pub(crate) struct GenFileResult {
pub(crate) compiler_plugin_result: compiler_plugin::GenResult,
pub(crate) mod_name: String,
}
pub(crate) fn gen_file(
file_descriptor: &FileDescriptor,
_files_map: &HashMap<&ProtoPath, &FileDescriptor>,
root_scope: &RootScope,
parent_customize: &CustomizeElemCtx,
parser: &str,
) -> anyhow::Result<GenFileResult> {
let lite_runtime_from_builtin_option = file_descriptor
.proto()
.options
.get_or_default()
.optimize_for()
== file_options::OptimizeMode::LITE_RUNTIME;
let mut customize_from_proto =
customize_from_rustproto_for_file(file_descriptor.proto().options.get_or_default());
if customize_from_proto.lite_runtime.is_none()
&& parent_customize.for_elem.lite_runtime.is_none()
{
customize_from_proto.lite_runtime = Some(lite_runtime_from_builtin_option);
}
let customize = parent_customize.child(&customize_from_proto, file_descriptor);
let file_scope = FileScope { file_descriptor };
let scope = file_scope.to_scope();
let lite_runtime = customize.for_elem.lite_runtime.unwrap_or(false);
let v = CodeWriter::with(|w| {
w.write_generated_by("rust-protobuf", "3.2.0", parser);
w.write_line("");
w.write_line(&format!(
"//! Generated file from `{}`",
file_descriptor.proto().name()
));
if customize.for_elem.lite_runtime.unwrap_or(false) {
w.comment("Generated for lite runtime");
}
if customize.for_elem.inside_protobuf != Some(true) {
w.write_line("");
w.write_line("/// Generated files are compatible only with the same version");
w.write_line("/// of protobuf runtime.");
w.write_line(&format!(
"const _PROTOBUF_VERSION_CHECK: () = {}::{};",
protobuf_crate_path(&customize.for_elem),
protobuf::VERSION_IDENT
));
}
static NESTED_TYPE_NUMBER: protobuf::rt::Lazy<i32> = protobuf::rt::Lazy::new();
let message_type_number = *NESTED_TYPE_NUMBER.get(|| {
protobuf::reflect::MessageDescriptor::for_type::<FileDescriptorProto>()
.field_by_name("message_type")
.expect("`message_type` must exist")
.proto()
.number()
});
let mut path = vec![message_type_number, 0];
for (id, message) in scope.messages().iter().enumerate() {
// ignore map entries, because they are not used in map fields
if !message.is_map() {
path[1] = id as i32;
w.write_line("");
MessageGen::new(
file_descriptor,
message,
&root_scope,
&customize,
&path,
file_descriptor.proto().source_code_info.as_ref(),
)?
.write(w)?;
}
}
static ENUM_TYPE_NUMBER: protobuf::rt::Lazy<i32> = protobuf::rt::Lazy::new();
let enum_type_number = *ENUM_TYPE_NUMBER.get(|| {
protobuf::reflect::MessageDescriptor::for_type::<FileDescriptorProto>()
.field_by_name("enum_type")
.expect("`enum_type` must exist")
.proto()
.number()
});
let mut path = vec![enum_type_number, 0];
for (id, enum_type) in scope.enums().iter().enumerate() {
path[1] = id as i32;
w.write_line("");
EnumGen::new(
enum_type,
&customize,
root_scope,
&path,
file_descriptor.proto().source_code_info.as_ref(),
)
.write(w);
}
write_extensions(file_descriptor, &root_scope, w, &customize);
if !lite_runtime {
w.write_line("");
write_file_descriptor_data(file_descriptor, &customize.for_elem, w);
}
Ok(())
})?;
Ok(GenFileResult {
compiler_plugin_result: compiler_plugin::GenResult {
name: proto_name_to_rs(file_descriptor.proto().name()),
content: v.into_bytes(),
},
mod_name: proto_path_to_rust_mod(file_descriptor.proto().name()).into_string(),
})
}
|
