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use std::{collections::hash_map::Entry, error::Error, path::Path, sync::Arc, time::Instant};
use dashmap::DashMap;
use once_cell::sync::{Lazy, OnceCell};
use rnode::{NodeIdGenerator, RNode, VisitWith};
use rustc_hash::FxHashMap;
use sha1::{Digest, Sha1};
use stc_ts_ast_rnode::{RDecl, RIdent, RModule, RModuleItem, RStmt, RTsModuleName, RVarDecl};
use stc_ts_builtin_types::Lib;
use stc_ts_env::{BuiltIn, Env, ModuleConfig, Rule, StableEnv};
use stc_ts_storage::Builtin;
use stc_ts_type_ops::Fix;
use stc_ts_types::{ClassDef, ModuleTypeData, Type};
use stc_utils::{cache::Freeze, stack};
use swc_atoms::JsWord;
use swc_common::DUMMY_SP;
use swc_ecma_ast::*;
use tracing::{info, warn};
use crate::{
analyzer::{Analyzer, ScopeKind},
validator::ValidateWith,
};
pub trait BuiltInGen: Sized {
#[allow(clippy::new_ret_no_self)]
fn new(vars: FxHashMap<JsWord, Type>, types: FxHashMap<JsWord, Type>) -> BuiltIn;
fn from_ts_libs(env: &StableEnv, libs: &[Lib], no_lib: bool) -> BuiltIn {
if !no_lib {
debug_assert_ne!(libs, &[], "No typescript library file is specified");
};
let key = {
let mut hasher = Sha1::new();
hasher.update(format!("{:?}", libs).as_bytes());
let result = hasher.finalize();
format!("{:x}", result)
};
let cache_path = Path::new(".stc").join(".builtin-cache").join(&format!("{}.rmp", key));
if cache_path.is_file() {
let res = || -> Result<BuiltIn, Box<dyn Error>> {
let data = std::fs::read(&cache_path)?;
let builtin = rmp_serde::decode::from_slice(&data)?;
Ok(builtin)
}();
match res {
Ok(builtin) => {
return builtin;
}
Err(err) => {
warn!("Failed to load builtin from cache: {:?}", err);
}
}
}
let _stack = stack::start(300);
let mut node_id_gen = NodeIdGenerator::default();
info!("Loading typescript builtin: {:?}", libs);
let modules = stc_ts_builtin_types::load(libs);
let iter = modules
.iter()
.flat_map(|module| match &*module.body {
TsNamespaceBody::TsModuleBlock(TsModuleBlock { body, .. }) => body,
TsNamespaceBody::TsNamespaceDecl(_) => unreachable!(),
})
.cloned()
.map(|orig| RModuleItem::from_orig(&mut node_id_gen, orig));
let builtin = Self::from_module_items(env, iter);
let json_data = rmp_serde::encode::to_vec(&builtin).unwrap_or_else(|err| panic!("failed to serialize builtin cache: {:?}", err));
std::fs::create_dir_all(cache_path.parent().unwrap())
.unwrap_or_else(|err| panic!("failed to create directory for builtin cache at {:?}: {:?}", cache_path, err));
std::fs::write(&cache_path, &json_data)
.unwrap_or_else(|err| panic!("failed to write builtin cache at {:?}: {:?}", cache_path, err));
builtin
}
fn from_modules(env: &StableEnv, modules: Vec<RModule>) -> BuiltIn {
Self::from_module_items(env, modules.into_iter().flat_map(|module| module.body))
}
fn from_module_items<I>(env: &StableEnv, items: I) -> BuiltIn
where
I: IntoIterator<Item = RModuleItem>,
{
info!("Merging builtin");
let start = Instant::now();
let mut types = FxHashMap::default();
let mut vars = FxHashMap::default();
let mut storage = Builtin::default();
{
let mut analyzer = Analyzer::for_builtin(env.clone(), &mut storage);
for mut item in items {
match item {
RModuleItem::ModuleDecl(ref md) => unreachable!("ModuleDecl: {:#?}", md),
RModuleItem::Stmt(ref mut stmt) => {
match *stmt {
RStmt::Decl(RDecl::Var(box RVarDecl { ref decls, .. })) => {
assert_eq!(decls.len(), 1);
stmt.visit_with(&mut analyzer);
}
RStmt::Decl(RDecl::Fn(..)) => {
stmt.visit_with(&mut analyzer);
}
RStmt::Decl(RDecl::Class(ref c)) => {
debug_assert_eq!(types.get(&c.ident.sym.clone()), None);
debug_assert_eq!(c.class.super_class, None);
debug_assert_eq!(c.class.implements, vec![]);
let ty = analyzer
.with_child(ScopeKind::Flow, Default::default(), |analyzer: &mut Analyzer| {
Ok(Type::ClassDef(
ClassDef {
span: c.class.span,
name: Some(c.ident.clone().into()),
is_abstract: c.class.is_abstract,
body: c
.class
.body
.clone()
.validate_with_default(analyzer)
.unwrap()
.into_iter()
.flatten()
.collect(),
super_class: None,
type_params: c
.class
.type_params
.validate_with(analyzer)
.map(|opt| box opt.expect("builtin: failed to parse type params of a class")),
implements: c.class.implements.validate_with(analyzer).map(Box::new).unwrap(),
metadata: Default::default(),
tracker: Default::default(),
}
.into(),
))
})
.unwrap();
types.insert(c.ident.sym.clone(), ty);
}
RStmt::Decl(RDecl::TsModule(ref mut m)) => {
let id = match m.id {
RTsModuleName::Ident(ref i) => i.sym.clone(),
_ => unreachable!(),
};
let mut data = Builtin::default();
{
let mut analyzer = Analyzer::for_builtin(env.clone(), &mut data);
m.body.visit_with(&mut analyzer);
}
assert!(!data.types.is_empty() || !data.vars.is_empty());
match types.entry(id.clone()) {
Entry::Occupied(mut e) => match e.get_mut().normalize_mut() {
Type::Module(module) => {
module.exports.types.extend(data.types);
module.exports.vars.extend(data.vars);
}
ref e => unimplemented!("Merging module with {:?}", e),
},
Entry::Vacant(e) => {
e.insert(
Type::Module(stc_ts_types::Module {
span: DUMMY_SP,
name: RTsModuleName::Ident(RIdent::new(id.clone(), DUMMY_SP)),
exports: box ModuleTypeData {
private_vars: Default::default(),
vars: data.vars,
private_types: Default::default(),
types: data.types,
},
metadata: Default::default(),
tracker: Default::default(),
})
.freezed(),
);
}
}
}
RStmt::Decl(RDecl::TsTypeAlias(ref a)) => {
a.visit_with(&mut analyzer);
debug_assert_eq!(types.get(&a.id.sym.clone()), None);
let ty = a
.clone()
.validate_with(&mut analyzer)
.map(Type::from)
.expect("builtin: failed to process type alias");
types.insert(a.id.sym.clone(), ty);
}
RStmt::Decl(RDecl::TsInterface(ref i)) => {
if i.id.sym == *"Generator" {
debug_assert!(i.type_params.is_some(), "builtin: Generator should have type parameter")
}
i.visit_with(&mut analyzer);
let body = i
.clone()
.validate_with(&mut analyzer)
.expect("builtin: failed to parse interface body")
.expect_interface();
match types.entry(i.id.sym.clone()) {
Entry::Occupied(mut e) => match e.get_mut().normalize_mut() {
Type::Interface(ref mut v) => {
v.body.extend(body.body);
}
_ => unreachable!("cannot merge interface with other type"),
},
Entry::Vacant(e) => {
let ty = i.clone().validate_with(&mut analyzer).expect("builtin: failed to parse interface");
e.insert(ty);
}
}
}
_ => panic!("{:#?}", item),
}
}
}
}
}
for (id, ty) in storage.vars {
let res = vars.insert(id, ty);
assert_eq!(res, None, "duplicate");
}
for (_, ty) in types.iter_mut() {
ty.fix();
ty.freeze();
}
for (_, ty) in vars.iter_mut() {
ty.fix();
ty.freeze();
}
let dur = Instant::now() - start;
Self::new(vars, types)
}
}
impl BuiltInGen for BuiltIn {
fn new(vars: FxHashMap<JsWord, Type>, types: FxHashMap<JsWord, Type>) -> BuiltIn {
BuiltIn::new(vars, types)
}
}
pub trait EnvFactory {
#[allow(clippy::new_ret_no_self)]
fn new(env: StableEnv, rule: Rule, target: EsVersion, module: ModuleConfig, builtin: Arc<BuiltIn>) -> Env;
fn simple(rule: Rule, target: EsVersion, module: ModuleConfig, libs: &[Lib]) -> Env {
static STABLE_ENV: Lazy<StableEnv> = Lazy::new(Default::default);
static CACHE: Lazy<DashMap<Vec<Lib>, Arc<OnceCell<Arc<BuiltIn>>>, ahash::RandomState>> = Lazy::new(Default::default);
let mut libs = libs.to_vec();
libs.sort();
libs.dedup();
let cell = CACHE.entry(libs.clone()).or_default().clone();
let builtin = {
let builtin = cell.get_or_init(|| {
let builtin = BuiltIn::from_ts_libs(&STABLE_ENV, &libs, rule.no_lib);
Arc::new(builtin)
});
(*builtin).clone()
};
Self::new(STABLE_ENV.clone(), rule, target, module, builtin)
}
}
impl EnvFactory for Env {
fn new(env: StableEnv, rule: Rule, target: EsVersion, module: ModuleConfig, builtin: Arc<BuiltIn>) -> Env {
Env::new(env, rule, target, module, builtin)
}
}
