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// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
use crate::errors::get_error_class_name;
use crate::file_fetcher::FileFetcher;
use deno_core::futures;
use deno_core::futures::FutureExt;
use deno_core::ModuleSpecifier;
use deno_graph::source::CacheInfo;
use deno_graph::source::LoadFuture;
use deno_graph::source::LoadResponse;
use deno_graph::source::Loader;
use deno_runtime::permissions::PermissionsContainer;
use std::collections::HashMap;
use std::sync::Arc;
mod cache_db;
mod caches;
mod check;
mod common;
mod deno_dir;
mod disk_cache;
mod emit;
mod http_cache;
mod incremental;
mod node;
mod parsed_source;
pub use caches::Caches;
pub use check::TypeCheckCache;
pub use common::FastInsecureHasher;
pub use deno_dir::DenoDir;
pub use deno_dir::DenoDirProvider;
pub use disk_cache::DiskCache;
pub use emit::EmitCache;
pub use http_cache::CachedUrlMetadata;
pub use http_cache::HttpCache;
pub use incremental::IncrementalCache;
pub use node::NodeAnalysisCache;
pub use parsed_source::ParsedSourceCache;
/// Permissions used to save a file in the disk caches.
pub const CACHE_PERM: u32 = 0o644;
/// A "wrapper" for the FileFetcher and DiskCache for the Deno CLI that provides
/// a concise interface to the DENO_DIR when building module graphs.
pub struct FetchCacher {
emit_cache: EmitCache,
file_fetcher: Arc<FileFetcher>,
file_header_overrides: HashMap<ModuleSpecifier, HashMap<String, String>>,
permissions: PermissionsContainer,
cache_info_enabled: bool,
maybe_local_node_modules_url: Option<ModuleSpecifier>,
}
impl FetchCacher {
pub fn new(
emit_cache: EmitCache,
file_fetcher: Arc<FileFetcher>,
file_header_overrides: HashMap<ModuleSpecifier, HashMap<String, String>>,
permissions: PermissionsContainer,
maybe_local_node_modules_url: Option<ModuleSpecifier>,
) -> Self {
Self {
emit_cache,
file_fetcher,
file_header_overrides,
permissions,
cache_info_enabled: false,
maybe_local_node_modules_url,
}
}
/// The cache information takes a bit of time to fetch and it's
/// not always necessary. It should only be enabled for deno info.
pub fn enable_loading_cache_info(&mut self) {
self.cache_info_enabled = true;
}
}
impl Loader for FetchCacher {
fn get_cache_info(&self, specifier: &ModuleSpecifier) -> Option<CacheInfo> {
if !self.cache_info_enabled {
return None;
}
#[allow(deprecated)]
let local = self.file_fetcher.get_local_path(specifier)?;
if local.is_file() {
let emit = self
.emit_cache
.get_emit_filepath(specifier)
.filter(|p| p.is_file());
Some(CacheInfo {
local: Some(local),
emit,
map: None,
})
} else {
None
}
}
fn load(
&mut self,
specifier: &ModuleSpecifier,
_is_dynamic: bool,
) -> LoadFuture {
if let Some(node_modules_url) = self.maybe_local_node_modules_url.as_ref() {
// The specifier might be in a completely different symlinked tree than
// what the resolved node_modules_url is in (ex. `/my-project-1/node_modules`
// symlinked to `/my-project-2/node_modules`), so first check if the path
// is in a node_modules dir to avoid needlessly canonicalizing, then compare
// against the canonicalized specifier.
if specifier.path().contains("/node_modules/") {
let specifier =
crate::node::resolve_specifier_into_node_modules(specifier);
if specifier.as_str().starts_with(node_modules_url.as_str()) {
return Box::pin(futures::future::ready(Ok(Some(
LoadResponse::External { specifier },
))));
}
}
}
let permissions = self.permissions.clone();
let file_fetcher = self.file_fetcher.clone();
let file_header_overrides = self.file_header_overrides.clone();
let specifier = specifier.clone();
async move {
file_fetcher
.fetch(&specifier, permissions)
.await
.map(|file| {
let maybe_headers =
match (file.maybe_headers, file_header_overrides.get(&specifier)) {
(Some(headers), Some(overrides)) => {
Some(headers.into_iter().chain(overrides.clone()).collect())
}
(Some(headers), None) => Some(headers),
(None, Some(overrides)) => Some(overrides.clone()),
(None, None) => None,
};
Ok(Some(LoadResponse::Module {
specifier: file.specifier,
maybe_headers,
content: file.source,
}))
})
.unwrap_or_else(|err| {
if let Some(err) = err.downcast_ref::<std::io::Error>() {
if err.kind() == std::io::ErrorKind::NotFound {
return Ok(None);
}
} else if get_error_class_name(&err) == "NotFound" {
return Ok(None);
}
Err(err)
})
}
.boxed()
}
}
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