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module_loader.rs
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1614 lines (1495 loc) · 49 KB
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// Copyright 2018-2025 the Deno authors. MIT license.
use std::borrow::Cow;
use std::cell::RefCell;
use std::collections::HashMap;
use std::collections::HashSet;
use std::future::Future;
use std::path::Path;
use std::path::PathBuf;
use std::pin::Pin;
use std::rc::Rc;
use std::str;
use std::sync::Arc;
use std::sync::atomic::AtomicU16;
use std::sync::atomic::Ordering;
use std::time::SystemTime;
use deno_ast::MediaType;
use deno_ast::ModuleKind;
use deno_cache_dir::file_fetcher::FetchLocalOptions;
use deno_cache_dir::file_fetcher::MemoryFiles as _;
use deno_core::FastString;
use deno_core::ModuleLoadOptions;
use deno_core::ModuleLoadReferrer;
use deno_core::ModuleLoader;
use deno_core::ModuleResolutionError;
use deno_core::ModuleSource;
use deno_core::ModuleSourceCode;
use deno_core::ModuleSpecifier;
use deno_core::ModuleType;
use deno_core::RequestedModuleType;
use deno_core::SourceCodeCacheInfo;
use deno_core::anyhow::Context as _;
use deno_core::anyhow::Error as AnyError;
use deno_core::anyhow::bail;
use deno_core::error::ModuleLoaderError;
use deno_core::futures::StreamExt;
use deno_core::futures::future::FutureExt;
use deno_core::futures::io::BufReader;
use deno_core::futures::stream::FuturesOrdered;
use deno_core::parking_lot::Mutex;
use deno_core::resolve_url;
use deno_core::serde_json;
use deno_error::JsErrorBox;
use deno_error::JsErrorClass;
use deno_graph::GraphKind;
use deno_graph::ModuleGraph;
use deno_graph::WalkOptions;
use deno_lib::loader::as_deno_resolver_requested_module_type;
use deno_lib::loader::loaded_module_source_to_module_source_code;
use deno_lib::loader::module_type_from_media_and_requested_type;
use deno_lib::npm::NpmRegistryReadPermissionChecker;
use deno_lib::util::hash::FastInsecureHasher;
use deno_lib::worker::CreateModuleLoaderResult;
use deno_lib::worker::ModuleLoaderFactory;
use deno_npm_installer::resolution::HasJsExecutionStartedFlagRc;
use deno_path_util::PathToUrlError;
use deno_path_util::resolve_url_or_path;
use deno_resolver::cache::ParsedSourceCache;
use deno_resolver::file_fetcher::FetchOptions;
use deno_resolver::file_fetcher::FetchPermissionsOptionRef;
use deno_resolver::graph::ResolveWithGraphErrorKind;
use deno_resolver::graph::ResolveWithGraphOptions;
use deno_resolver::graph::format_range_with_colors;
use deno_resolver::loader::LoadCodeSourceError;
use deno_resolver::loader::LoadPreparedModuleError;
use deno_resolver::loader::LoadedModule;
use deno_resolver::loader::LoadedModuleOrAsset;
use deno_resolver::loader::MemoryFiles;
use deno_resolver::loader::StrippingTypesNodeModulesError;
use deno_resolver::npm::DenoInNpmPackageChecker;
use deno_runtime::code_cache;
use deno_runtime::deno_node::NodeRequireLoader;
use deno_runtime::deno_node::create_host_defined_options;
use deno_runtime::deno_node::ops::require::UnableToGetCwdError;
use deno_runtime::deno_permissions::CheckSpecifierKind;
use deno_runtime::deno_permissions::PermissionsContainer;
use deno_semver::npm::NpmPackageReqReference;
use eszip::EszipV2;
use node_resolver::InNpmPackageChecker;
use node_resolver::NodeResolutionKind;
use node_resolver::ResolutionMode;
use node_resolver::errors::PackageJsonLoadError;
use sys_traits::FsMetadata;
use sys_traits::FsMetadataValue;
use sys_traits::FsRead;
use tokio_util::compat::TokioAsyncReadCompatExt;
use crate::args::CliLockfile;
use crate::args::CliOptions;
use crate::args::DenoSubcommand;
use crate::args::TsTypeLib;
use crate::args::jsr_url;
use crate::cache::CodeCache;
use crate::file_fetcher::CliFileFetcher;
use crate::graph_container::MainModuleGraphContainer;
use crate::graph_container::ModuleGraphContainer;
use crate::graph_container::ModuleGraphUpdatePermit;
use crate::graph_util::BuildGraphRequest;
use crate::graph_util::BuildGraphWithNpmOptions;
use crate::graph_util::ModuleGraphBuilder;
use crate::npm::CliNpmResolver;
use crate::resolver::CliCjsTracker;
use crate::resolver::CliResolver;
use crate::sys::CliSys;
use crate::type_checker::CheckError;
use crate::type_checker::CheckOptions;
use crate::type_checker::TypeChecker;
use crate::util::progress_bar::ProgressBar;
use crate::util::text_encoding::code_without_source_map;
use crate::util::text_encoding::source_map_from_code;
pub type CliEmitter =
deno_resolver::emit::Emitter<DenoInNpmPackageChecker, CliSys>;
pub type CliDenoResolverModuleLoader =
deno_resolver::loader::ModuleLoader<CliSys>;
#[derive(Debug, thiserror::Error, deno_error::JsError)]
pub enum PrepareModuleLoadError {
#[class(inherit)]
#[error(transparent)]
BuildGraphWithNpmResolution(
#[from] crate::graph_util::BuildGraphWithNpmResolutionError,
),
#[class(inherit)]
#[error(transparent)]
Check(#[from] CheckError),
#[class(inherit)]
#[error(transparent)]
LockfileWrite(#[from] deno_resolver::lockfile::LockfileWriteError),
#[class(inherit)]
#[error(transparent)]
Other(#[from] JsErrorBox),
}
pub struct ModuleLoadPreparer {
options: Arc<CliOptions>,
lockfile: Option<Arc<CliLockfile>>,
module_graph_builder: Arc<ModuleGraphBuilder>,
progress_bar: ProgressBar,
type_checker: Arc<TypeChecker>,
}
pub struct PrepareModuleLoadOptions<'a> {
pub is_dynamic: bool,
pub lib: TsTypeLib,
pub permissions: PermissionsContainer,
pub ext_overwrite: Option<&'a String>,
pub allow_unknown_media_types: bool,
/// Whether to skip validating the graph roots. This is useful
/// for when you want to defer doing this until later (ex. get the
/// graph back, reload some specifiers in it, then do graph validation).
pub skip_graph_roots_validation: bool,
}
impl ModuleLoadPreparer {
#[allow(clippy::too_many_arguments)]
pub fn new(
options: Arc<CliOptions>,
lockfile: Option<Arc<CliLockfile>>,
module_graph_builder: Arc<ModuleGraphBuilder>,
progress_bar: ProgressBar,
type_checker: Arc<TypeChecker>,
) -> Self {
Self {
options,
lockfile,
module_graph_builder,
progress_bar,
type_checker,
}
}
/// This method must be called for a module or a static importer of that
/// module before attempting to `load()` it from a `JsRuntime`. It will
/// populate the graph data in memory with the necessary source code, write
/// emits where necessary or report any module graph / type checking errors.
pub async fn prepare_module_load(
&self,
graph: &mut ModuleGraph,
roots: &[ModuleSpecifier],
options: PrepareModuleLoadOptions<'_>,
) -> Result<(), PrepareModuleLoadError> {
log::debug!("Preparing module load.");
let PrepareModuleLoadOptions {
is_dynamic,
lib,
permissions,
ext_overwrite,
allow_unknown_media_types,
skip_graph_roots_validation,
} = options;
let _pb_clear_guard = self.progress_bar.deferred_keep_initialize_alive();
let mut loader = self
.module_graph_builder
.create_graph_loader_with_permissions(permissions);
if let Some(ext) = ext_overwrite {
let maybe_content_type = match ext.as_str() {
"ts" => Some("text/typescript"),
"tsx" => Some("text/tsx"),
"js" => Some("text/javascript"),
"jsx" => Some("text/jsx"),
_ => None,
};
if let Some(content_type) = maybe_content_type {
for root in roots {
loader.insert_file_header_override(
root.clone(),
std::collections::HashMap::from([(
"content-type".to_string(),
content_type.to_string(),
)]),
);
}
}
}
log::debug!("Building module graph.");
let has_type_checked = !graph.roots.is_empty();
self
.module_graph_builder
.build_graph_with_npm_resolution(
graph,
BuildGraphWithNpmOptions {
is_dynamic,
request: BuildGraphRequest::Roots(roots.to_vec()),
loader: Some(&mut loader),
npm_caching: self.options.default_npm_caching_strategy(),
},
)
.await?;
if !skip_graph_roots_validation {
self.graph_roots_valid(graph, roots, allow_unknown_media_types, false)?;
}
drop(_pb_clear_guard);
// type check if necessary
if self.options.type_check_mode().is_true() && !has_type_checked {
self.type_checker.check(
// todo(perf): since this is only done the first time the graph is
// created, we could avoid the clone of the graph here by providing
// the actual graph on the first run and then getting the Arc<ModuleGraph>
// back from the return value.
graph.clone(),
CheckOptions {
build_fast_check_graph: true,
lib,
reload: self.options.reload_flag(),
type_check_mode: self.options.type_check_mode(),
},
)?;
}
// write the lockfile if there is one and do so after type checking
// as type checking might discover `@types/node`
if let Some(lockfile) = &self.lockfile {
lockfile.write_if_changed()?;
}
log::debug!("Prepared module load.");
Ok(())
}
pub async fn reload_specifiers(
&self,
graph: &mut ModuleGraph,
specifiers: Vec<ModuleSpecifier>,
is_dynamic: bool,
permissions: PermissionsContainer,
) -> Result<(), PrepareModuleLoadError> {
log::debug!(
"Reloading modified files: {}",
specifiers
.iter()
.map(|s| s.as_str())
.collect::<Vec<_>>()
.join(", ")
);
let _pb_clear_guard = self.progress_bar.deferred_keep_initialize_alive();
let mut loader = self
.module_graph_builder
.create_graph_loader_with_permissions(permissions);
self
.module_graph_builder
.build_graph_with_npm_resolution(
graph,
BuildGraphWithNpmOptions {
is_dynamic,
request: BuildGraphRequest::Reload(specifiers),
loader: Some(&mut loader),
npm_caching: self.options.default_npm_caching_strategy(),
},
)
.await?;
if let Some(lockfile) = &self.lockfile {
lockfile.write_if_changed()?;
}
Ok(())
}
pub fn graph_roots_valid(
&self,
graph: &ModuleGraph,
roots: &[ModuleSpecifier],
allow_unknown_media_types: bool,
allow_unknown_jsr_exports: bool,
) -> Result<(), JsErrorBox> {
self.module_graph_builder.graph_roots_valid(
graph,
roots,
allow_unknown_media_types,
allow_unknown_jsr_exports,
)
}
}
struct SharedCliModuleLoaderState {
graph_kind: GraphKind,
lib_window: TsTypeLib,
lib_worker: TsTypeLib,
initial_cwd: PathBuf,
is_inspecting: bool,
is_repl: bool,
cjs_tracker: Arc<CliCjsTracker>,
code_cache: Option<Arc<CodeCache>>,
emitter: Arc<CliEmitter>,
file_fetcher: Arc<CliFileFetcher>,
has_js_execution_started_flag: HasJsExecutionStartedFlagRc,
in_npm_pkg_checker: DenoInNpmPackageChecker,
main_module_graph_container: Arc<MainModuleGraphContainer>,
memory_files: Arc<MemoryFiles>,
module_load_preparer: Arc<ModuleLoadPreparer>,
npm_registry_permission_checker:
Arc<NpmRegistryReadPermissionChecker<CliSys>>,
npm_resolver: CliNpmResolver,
parsed_source_cache: Arc<ParsedSourceCache>,
module_loader: Arc<CliDenoResolverModuleLoader>,
resolver: Arc<CliResolver>,
sys: CliSys,
in_flight_loads_tracker: InFlightModuleLoadsTracker,
maybe_eszip_loader: Option<Arc<EszipModuleLoader>>,
}
struct InFlightModuleLoadsTracker {
loads_number: Arc<AtomicU16>,
cleanup_task_timeout: u64,
cleanup_task_handle: Arc<Mutex<Option<tokio::task::JoinHandle<()>>>>,
}
impl InFlightModuleLoadsTracker {
pub fn increase(&self) {
self.loads_number.fetch_add(1, Ordering::Relaxed);
if let Some(task) = self.cleanup_task_handle.lock().take() {
task.abort();
}
}
pub fn decrease(&self, parsed_source_cache: &Arc<ParsedSourceCache>) {
let prev = self.loads_number.fetch_sub(1, Ordering::Relaxed);
if prev == 1 {
let parsed_source_cache = parsed_source_cache.clone();
let timeout = self.cleanup_task_timeout;
let task_handle = tokio::spawn(async move {
// We use a timeout here, which is defined to 10s,
// so that in situations when dynamic imports are loaded after the startup,
// we don't need to recompute and analyze multiple modules.
tokio::time::sleep(std::time::Duration::from_millis(timeout)).await;
parsed_source_cache.free_all();
});
let maybe_prev_task =
self.cleanup_task_handle.lock().replace(task_handle);
if let Some(prev_task) = maybe_prev_task {
prev_task.abort();
}
}
}
}
pub struct CliModuleLoaderFactory {
shared: Arc<SharedCliModuleLoaderState>,
}
impl CliModuleLoaderFactory {
#[allow(clippy::too_many_arguments)]
pub fn new(
options: &CliOptions,
cjs_tracker: Arc<CliCjsTracker>,
code_cache: Option<Arc<CodeCache>>,
emitter: Arc<CliEmitter>,
file_fetcher: Arc<CliFileFetcher>,
has_js_execution_started_flag: HasJsExecutionStartedFlagRc,
in_npm_pkg_checker: DenoInNpmPackageChecker,
main_module_graph_container: Arc<MainModuleGraphContainer>,
memory_files: Arc<MemoryFiles>,
module_load_preparer: Arc<ModuleLoadPreparer>,
npm_registry_permission_checker: Arc<
NpmRegistryReadPermissionChecker<CliSys>,
>,
npm_resolver: CliNpmResolver,
parsed_source_cache: Arc<ParsedSourceCache>,
module_loader: Arc<CliDenoResolverModuleLoader>,
resolver: Arc<CliResolver>,
sys: CliSys,
maybe_eszip_loader: Option<Arc<EszipModuleLoader>>,
) -> Self {
Self {
shared: Arc::new(SharedCliModuleLoaderState {
graph_kind: options.graph_kind(),
lib_window: options.ts_type_lib_window(),
lib_worker: options.ts_type_lib_worker(),
initial_cwd: options.initial_cwd().to_path_buf(),
is_inspecting: options.is_inspecting(),
is_repl: matches!(
options.sub_command(),
DenoSubcommand::Repl(_) | DenoSubcommand::Jupyter(_)
),
cjs_tracker,
code_cache,
emitter,
file_fetcher,
has_js_execution_started_flag,
in_npm_pkg_checker,
main_module_graph_container,
memory_files,
module_load_preparer,
npm_registry_permission_checker,
npm_resolver,
parsed_source_cache,
module_loader,
resolver,
sys,
in_flight_loads_tracker: InFlightModuleLoadsTracker {
loads_number: Arc::new(AtomicU16::new(0)),
cleanup_task_timeout: 10_000,
cleanup_task_handle: Arc::new(Mutex::new(None)),
},
maybe_eszip_loader,
}),
}
}
fn create_with_lib<TGraphContainer: ModuleGraphContainer>(
&self,
graph_container: TGraphContainer,
lib: TsTypeLib,
is_worker: bool,
parent_permissions: PermissionsContainer,
permissions: PermissionsContainer,
) -> CreateModuleLoaderResult {
let module_loader =
Rc::new(CliModuleLoader(Rc::new(CliModuleLoaderInner {
lib,
is_worker,
parent_permissions,
permissions,
graph_container: graph_container.clone(),
shared: self.shared.clone(),
loaded_files: Default::default(),
})));
let node_require_loader = Rc::new(CliNodeRequireLoader {
cjs_tracker: self.shared.cjs_tracker.clone(),
emitter: self.shared.emitter.clone(),
npm_resolver: self.shared.npm_resolver.clone(),
sys: self.shared.sys.clone(),
graph_container,
in_npm_pkg_checker: self.shared.in_npm_pkg_checker.clone(),
memory_files: self.shared.memory_files.clone(),
npm_registry_permission_checker: self
.shared
.npm_registry_permission_checker
.clone(),
});
CreateModuleLoaderResult {
module_loader,
node_require_loader,
}
}
}
impl ModuleLoaderFactory for CliModuleLoaderFactory {
fn create_for_main(
&self,
root_permissions: PermissionsContainer,
) -> CreateModuleLoaderResult {
self.create_with_lib(
(*self.shared.main_module_graph_container).clone(),
self.shared.lib_window,
/* is worker */ false,
root_permissions.clone(),
root_permissions,
)
}
fn create_for_worker(
&self,
parent_permissions: PermissionsContainer,
permissions: PermissionsContainer,
) -> CreateModuleLoaderResult {
self.create_with_lib(
// create a fresh module graph for the worker
WorkerModuleGraphContainer::new(Arc::new(ModuleGraph::new(
self.shared.graph_kind,
))),
self.shared.lib_worker,
/* is worker */ true,
parent_permissions,
permissions,
)
}
}
struct ModuleCodeStringSource {
pub code: ModuleSourceCode,
pub found_url: ModuleSpecifier,
pub module_type: ModuleType,
}
struct CliModuleLoaderInner<TGraphContainer: ModuleGraphContainer> {
lib: TsTypeLib,
is_worker: bool,
/// The initial set of permissions used to resolve the static imports in the
/// worker. These are "allow all" for main worker, and parent thread
/// permissions for Web Worker.
parent_permissions: PermissionsContainer,
permissions: PermissionsContainer,
shared: Arc<SharedCliModuleLoaderState>,
graph_container: TGraphContainer,
loaded_files: RefCell<HashSet<ModuleSpecifier>>,
}
#[derive(Debug, thiserror::Error, deno_error::JsError)]
pub enum ResolveReferrerError {
#[class(inherit)]
#[error(transparent)]
UnableToGetCwd(#[from] UnableToGetCwdError),
#[class(inherit)]
#[error(transparent)]
PathToUrl(#[from] PathToUrlError),
#[class(inherit)]
#[error(transparent)]
ModuleResolution(#[from] ModuleResolutionError),
}
#[derive(Debug, thiserror::Error, deno_error::JsError)]
pub enum CliModuleLoaderError {
#[class(inherit)]
#[error(transparent)]
Fetch(#[from] deno_resolver::file_fetcher::FetchError),
#[class(inherit)]
#[error(transparent)]
LoadCodeSource(#[from] LoadCodeSourceError),
#[class(inherit)]
#[error(transparent)]
LoadPreparedModule(#[from] LoadPreparedModuleError),
#[class(inherit)]
#[error(transparent)]
PathToUrl(#[from] PathToUrlError),
#[class(inherit)]
#[error(transparent)]
ResolveNpmReqRef(#[from] deno_resolver::npm::ResolveNpmReqRefError),
#[class(inherit)]
#[error(transparent)]
ResolveReferrer(#[from] ResolveReferrerError),
}
impl<TGraphContainer: ModuleGraphContainer>
CliModuleLoaderInner<TGraphContainer>
{
async fn load_inner(
&self,
specifier: &ModuleSpecifier,
maybe_referrer: Option<&ModuleSpecifier>,
requested_module_type: &RequestedModuleType,
) -> Result<ModuleSource, ModuleLoaderError> {
let code_source = self
.load_code_source(specifier, maybe_referrer, requested_module_type)
.await
.map_err(JsErrorBox::from_err)?;
let code = if self.shared.is_inspecting
|| code_source.module_type == ModuleType::Wasm
{
// we need the code with the source map in order for
// it to work with --inspect or --inspect-brk
code_source.code
} else {
// v8 is slower when source maps are present, so we strip them
code_without_source_map(code_source.code)
};
let code_cache = if code_source.module_type == ModuleType::JavaScript {
self.shared.code_cache.as_ref().map(|cache| {
let code_hash = FastInsecureHasher::new_deno_versioned()
.write_hashable(&code)
.finish();
let data = cache
.get_sync(specifier, code_cache::CodeCacheType::EsModule, code_hash)
.map(Cow::from)
.inspect(|_| {
// This log line is also used by tests.
log::debug!(
"V8 code cache hit for ES module: {specifier}, [{code_hash:?}]"
);
});
SourceCodeCacheInfo {
hash: code_hash,
data,
}
})
} else {
None
};
Ok(ModuleSource::new_with_redirect(
code_source.module_type,
code,
specifier,
&code_source.found_url,
code_cache,
))
}
async fn load_code_source(
&self,
specifier: &ModuleSpecifier,
maybe_referrer: Option<&ModuleSpecifier>,
requested_module_type: &RequestedModuleType,
) -> Result<ModuleCodeStringSource, CliModuleLoaderError> {
// this loader maintains npm specifiers in dynamic imports when resolving
// so that they can be properly preloaded, but now we might receive them
// here, so we need to actually resolve them to a file: specifier here
let specifier = if let Ok(reference) =
NpmPackageReqReference::from_specifier(specifier)
{
let referrer = match maybe_referrer {
// if we're here, it means it was importing from a dynamic import
// and so there will be a referrer
Some(r) => Cow::Borrowed(r),
// but the repl may also end up here and it won't have
// a referrer so create a referrer for it here
None => Cow::Owned(self.resolve_referrer("")?),
};
Cow::Owned(
self
.shared
.resolver
.resolve_non_workspace_npm_req_ref_to_file(
&reference,
&referrer,
ResolutionMode::Import,
NodeResolutionKind::Execution,
)?
.into_url()?,
)
} else {
Cow::Borrowed(specifier)
};
let graph = self.graph_container.graph();
let deno_resolver_requested_module_type =
as_deno_resolver_requested_module_type(requested_module_type);
match self
.shared
.module_loader
.load(
&graph,
&specifier,
maybe_referrer,
&deno_resolver_requested_module_type,
)
.await?
{
LoadedModuleOrAsset::Module(prepared_module) => {
Ok(self.loaded_module_to_module_code_string_source(
prepared_module,
requested_module_type,
))
}
LoadedModuleOrAsset::ExternalAsset {
specifier,
statically_analyzable,
} => {
Ok(
self
.load_asset(
&specifier,
if statically_analyzable {
CheckSpecifierKind::Static
} else {
// force permissions
CheckSpecifierKind::Dynamic
},
requested_module_type,
)
.await?,
)
}
}
}
fn loaded_module_to_module_code_string_source(
&self,
loaded_module: LoadedModule,
requested_module_type: &RequestedModuleType,
) -> ModuleCodeStringSource {
ModuleCodeStringSource {
code: loaded_module_source_to_module_source_code(loaded_module.source),
found_url: loaded_module.specifier.into_owned(),
module_type: module_type_from_media_and_requested_type(
loaded_module.media_type,
requested_module_type,
),
}
}
async fn load_asset(
&self,
specifier: &ModuleSpecifier,
check_specifier_kind: CheckSpecifierKind,
requested_module_type: &RequestedModuleType,
) -> Result<ModuleCodeStringSource, deno_resolver::file_fetcher::FetchError>
{
let file = self
.shared
.file_fetcher
.fetch_with_options(
specifier,
FetchPermissionsOptionRef::Restricted(
match check_specifier_kind {
CheckSpecifierKind::Static => &self.permissions,
CheckSpecifierKind::Dynamic => &self.parent_permissions,
},
check_specifier_kind,
),
FetchOptions {
local: FetchLocalOptions {
include_mtime: false,
},
maybe_auth: None,
maybe_accept: None,
maybe_cache_setting: Some(
&deno_cache_dir::file_fetcher::CacheSetting::Use,
),
},
)
.await?;
let module_type = match requested_module_type {
RequestedModuleType::Text => ModuleType::Text,
RequestedModuleType::Bytes => ModuleType::Bytes,
RequestedModuleType::None => {
match file.resolve_media_type_and_charset().0 {
MediaType::Wasm => ModuleType::Wasm,
_ => ModuleType::JavaScript,
}
}
t => unreachable!("{t}"),
};
Ok(ModuleCodeStringSource {
code: ModuleSourceCode::Bytes(file.source.into()),
found_url: file.url,
module_type,
})
}
async fn maybe_reload_dynamic(
&self,
graph: &ModuleGraph,
specifier: &ModuleSpecifier,
permissions: &PermissionsContainer,
) -> Result<bool, PrepareModuleLoadError> {
let specifiers_to_reload =
self.check_specifiers_to_reload_for_dynamic_import(graph, specifier);
if specifiers_to_reload.is_empty() {
return Ok(false);
}
let mut graph_permit = self.graph_container.acquire_update_permit().await;
let graph = graph_permit.graph_mut();
self
.shared
.module_load_preparer
.reload_specifiers(
graph,
specifiers_to_reload,
/* is dynamic */ true,
permissions.clone(),
)
.await?;
graph_permit.commit();
Ok(true)
}
fn check_specifiers_to_reload_for_dynamic_import(
&self,
graph: &ModuleGraph,
specifier: &ModuleSpecifier,
) -> Vec<ModuleSpecifier> {
let mut specifiers_to_reload = Vec::new();
let mut module_iter = graph.walk(
std::iter::once(specifier),
WalkOptions {
check_js: deno_graph::CheckJsOption::False,
follow_dynamic: false,
kind: GraphKind::CodeOnly,
prefer_fast_check_graph: false,
},
);
while let Some((specifier, module_entry)) = module_iter.next() {
if specifier.scheme() != "file"
|| self.loaded_files.borrow().contains(specifier)
{
module_iter.skip_previous_dependencies(); // no need to analyze this module's dependencies
continue;
}
let should_reload = match module_entry {
deno_graph::ModuleEntryRef::Module(module) => {
self.has_module_changed_on_file_system(specifier, module.mtime())
}
deno_graph::ModuleEntryRef::Err(err) => {
if matches!(
err.as_kind(),
deno_graph::ModuleErrorKind::Missing { .. }
) {
self.mtime_of_specifier(specifier).is_some() // it exists now
} else {
self.has_module_changed_on_file_system(specifier, err.mtime())
}
}
deno_graph::ModuleEntryRef::Redirect(_) => false,
};
if should_reload {
specifiers_to_reload.push(specifier.clone());
}
}
self.loaded_files.borrow_mut().insert(specifier.clone());
specifiers_to_reload
}
fn has_module_changed_on_file_system(
&self,
specifier: &ModuleSpecifier,
mtime: Option<SystemTime>,
) -> bool {
let Some(loaded_mtime) = mtime else {
return false;
};
self
.mtime_of_specifier(specifier)
.map(|mtime| mtime > loaded_mtime)
.unwrap_or(false)
}
fn mtime_of_specifier(
&self,
specifier: &ModuleSpecifier,
) -> Option<SystemTime> {
deno_path_util::url_to_file_path(specifier)
.ok()
.and_then(|path| self.shared.sys.fs_symlink_metadata(&path).ok())
.and_then(|metadata| metadata.modified().ok())
}
#[allow(clippy::result_large_err)]
fn resolve_referrer(
&self,
referrer: &str,
) -> Result<ModuleSpecifier, ResolveReferrerError> {
let referrer = if referrer.is_empty() && self.shared.is_repl {
// FIXME(bartlomieju): this is a hacky way to provide compatibility with REPL
// and `Deno.core.evalContext` API. Ideally we should always have a referrer filled
"./$deno$repl.mts"
} else {
referrer
};
Ok(if deno_path_util::specifier_has_uri_scheme(referrer) {
deno_core::resolve_url(referrer)?
} else if referrer == "." {
// main module, use the initial cwd
deno_path_util::resolve_path(referrer, &self.shared.initial_cwd)?
} else {
// this cwd check is slow, so try to avoid it
let cwd = std::env::current_dir().map_err(UnableToGetCwdError)?;
deno_path_util::resolve_path(referrer, &cwd)?
})
}
#[allow(clippy::result_large_err)]
fn inner_resolve(
&self,
raw_specifier: &str,
raw_referrer: &str,
kind: deno_core::ResolutionKind,
is_import_meta: bool,
) -> Result<ModuleSpecifier, ModuleLoaderError> {
fn ensure_not_jsr_non_jsr_remote_import(
specifier: &ModuleSpecifier,
referrer: &ModuleSpecifier,
) -> Result<(), JsErrorBox> {
if referrer.as_str().starts_with(jsr_url().as_str())
&& !specifier.as_str().starts_with(jsr_url().as_str())
&& matches!(specifier.scheme(), "http" | "https")
{
return Err(JsErrorBox::generic(format!(
"Importing {} blocked. JSR packages cannot import non-JSR remote modules for security reasons.",
specifier
)));
}
Ok(())
}
let referrer = self
.resolve_referrer(raw_referrer)
.map_err(JsErrorBox::from_err)?;
let graph = self.graph_container.graph();
let result = self.shared.resolver.resolve_with_graph(
graph.as_ref(),
raw_specifier,
&referrer,
deno_graph::Position::zeroed(),
ResolveWithGraphOptions {
mode: ResolutionMode::Import,
kind: NodeResolutionKind::Execution,
// leave npm specifiers as-is for dynamic imports so that
// the loader can properly install them if necessary
maintain_npm_specifiers: matches!(
kind,
deno_core::ResolutionKind::DynamicImport
) && !is_import_meta,
},
);
let specifier = match result {
Ok(specifier) => specifier,
Err(err) => {
if let Some(specifier) = err
.maybe_specifier()
.filter(|_| is_import_meta)
.and_then(|s| s.into_owned().into_url().ok())
{
specifier
} else {
match err.into_kind() {
ResolveWithGraphErrorKind::Resolution(err) => {
// todo(dsherret): why do we have a newline here? Document it.
return Err(JsErrorBox::type_error(format!(
"{}\n",
err.to_string_with_range()
)));
}
err => return Err(JsErrorBox::from_err(err)),
}
}
}
};
// only verify this for an import and not import.meta.resolve
if !is_import_meta {
ensure_not_jsr_non_jsr_remote_import(&specifier, &referrer)?;
}
Ok(specifier)
}
}
#[derive(Clone)]
// todo(dsherret): this double Rc boxing is not ideal
pub struct CliModuleLoader<TGraphContainer: ModuleGraphContainer>(
Rc<CliModuleLoaderInner<TGraphContainer>>,
);
impl<TGraphContainer: ModuleGraphContainer> ModuleLoader
for CliModuleLoader<TGraphContainer>
{
fn resolve(
&self,
specifier: &str,
referrer: &str,
kind: deno_core::ResolutionKind,
) -> Result<ModuleSpecifier, ModuleLoaderError> {
self.0.inner_resolve(specifier, referrer, kind, false)
}
fn import_meta_resolve(
&self,
specifier: &str,
referrer: &str,
) -> Result<ModuleSpecifier, ModuleLoaderError> {
self.0.inner_resolve(