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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
use crate::emit::TypeLib;
use crate::proc_state::ProcState;
use deno_core::error::AnyError;
use deno_core::futures::future::FutureExt;
use deno_core::futures::Future;
use deno_core::ModuleLoader;
use deno_core::ModuleSpecifier;
use deno_core::OpState;
use deno_runtime::permissions::Permissions;
use std::cell::RefCell;
use std::pin::Pin;
use std::rc::Rc;
use std::str;
pub struct CliModuleLoader {
pub lib: TypeLib,
/// The initial set of permissions used to resolve the static imports in the
/// worker. They are decoupled from the worker (dynamic) permissions since
/// read access errors must be raised based on the parent thread permissions.
pub root_permissions: Permissions,
pub ps: ProcState,
}
impl CliModuleLoader {
pub fn new(ps: ProcState) -> Rc<Self> {
let lib = if ps.flags.unstable {
TypeLib::UnstableDenoWindow
} else {
TypeLib::DenoWindow
};
Rc::new(CliModuleLoader {
lib,
root_permissions: Permissions::allow_all(),
ps,
})
}
pub fn new_for_worker(ps: ProcState, permissions: Permissions) -> Rc<Self> {
let lib = if ps.flags.unstable {
TypeLib::UnstableDenoWorker
} else {
TypeLib::DenoWorker
};
Rc::new(CliModuleLoader {
lib,
root_permissions: permissions,
ps,
})
}
}
impl ModuleLoader for CliModuleLoader {
fn resolve(
&self,
specifier: &str,
referrer: &str,
_is_main: bool,
) -> Result<ModuleSpecifier, AnyError> {
self.ps.resolve(specifier, referrer)
}
fn load(
&self,
module_specifier: &ModuleSpecifier,
maybe_referrer: Option<ModuleSpecifier>,
is_dynamic: bool,
) -> Pin<Box<deno_core::ModuleSourceFuture>> {
let module_specifier = module_specifier.clone();
let ps = self.ps.clone();
// NOTE: this block is async only because of `deno_core` interface
// requirements; module was already loaded when constructing module graph
// during call to `prepare_load`.
async move { ps.load(module_specifier, maybe_referrer, is_dynamic) }
.boxed_local()
}
fn prepare_load(
&self,
op_state: Rc<RefCell<OpState>>,
specifier: &ModuleSpecifier,
_maybe_referrer: Option<String>,
is_dynamic: bool,
) -> Pin<Box<dyn Future<Output = Result<(), AnyError>>>> {
let specifier = specifier.clone();
let ps = self.ps.clone();
let state = op_state.borrow();
let dynamic_permissions = state.borrow::<Permissions>().clone();
let root_permissions = if is_dynamic {
dynamic_permissions.clone()
} else {
self.root_permissions.clone()
};
let lib = match self.lib {
TypeLib::DenoWindow => crate::emit::TypeLib::DenoWindow,
TypeLib::DenoWorker => crate::emit::TypeLib::DenoWorker,
TypeLib::UnstableDenoWindow => crate::emit::TypeLib::UnstableDenoWindow,
TypeLib::UnstableDenoWorker => crate::emit::TypeLib::UnstableDenoWorker,
};
drop(state);
async move {
ps.prepare_module_load(
vec![specifier],
is_dynamic,
lib,
root_permissions,
dynamic_permissions,
false,
)
.await
}
.boxed_local()
}
}
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