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// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
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2021-10-10 17:26:22 -04:00
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2021-12-22 08:25:06 -05:00
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use crate::errors::get_error_class_name;
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use crate::file_fetcher::FileFetcher;
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use deno_core::futures;
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use deno_core::futures::FutureExt;
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use deno_core::ModuleSpecifier;
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use deno_graph::source::CacheInfo;
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use deno_graph::source::LoadFuture;
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use deno_graph::source::LoadResponse;
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use deno_graph::source::Loader;
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use deno_runtime::permissions::PermissionsContainer;
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use std::sync::Arc;
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2022-07-12 18:58:39 -04:00
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mod check;
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mod common;
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mod deno_dir;
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mod disk_cache;
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mod emit;
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mod http_cache;
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mod incremental;
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mod node;
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mod parsed_source;
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pub use check::TypeCheckCache;
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pub use common::FastInsecureHasher;
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pub use deno_dir::DenoDir;
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pub use disk_cache::DiskCache;
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pub use emit::EmitCache;
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pub use http_cache::CachedUrlMetadata;
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pub use http_cache::HttpCache;
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pub use incremental::IncrementalCache;
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pub use node::NodeAnalysisCache;
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pub use parsed_source::ParsedSourceCache;
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/// Permissions used to save a file in the disk caches.
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pub const CACHE_PERM: u32 = 0o644;
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/// A "wrapper" for the FileFetcher and DiskCache for the Deno CLI that provides
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/// a concise interface to the DENO_DIR when building module graphs.
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pub struct FetchCacher {
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emit_cache: EmitCache,
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dynamic_permissions: PermissionsContainer,
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file_fetcher: Arc<FileFetcher>,
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root_permissions: PermissionsContainer,
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cache_info_enabled: bool,
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maybe_local_node_modules_url: Option<ModuleSpecifier>,
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}
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impl FetchCacher {
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pub fn new(
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emit_cache: EmitCache,
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file_fetcher: Arc<FileFetcher>,
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root_permissions: PermissionsContainer,
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dynamic_permissions: PermissionsContainer,
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maybe_local_node_modules_url: Option<ModuleSpecifier>,
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) -> Self {
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Self {
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emit_cache,
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dynamic_permissions,
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file_fetcher,
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root_permissions,
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cache_info_enabled: false,
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maybe_local_node_modules_url,
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}
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}
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/// The cache information takes a bit of time to fetch and it's
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/// not always necessary. It should only be enabled for deno info.
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pub fn enable_loading_cache_info(&mut self) {
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self.cache_info_enabled = true;
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}
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}
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impl Loader for FetchCacher {
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fn get_cache_info(&self, specifier: &ModuleSpecifier) -> Option<CacheInfo> {
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if !self.cache_info_enabled {
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return None;
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}
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let local = self.file_fetcher.get_local_path(specifier)?;
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if local.is_file() {
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let emit = self
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.emit_cache
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.get_emit_filepath(specifier)
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.filter(|p| p.is_file());
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Some(CacheInfo {
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local: Some(local),
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emit,
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map: None,
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})
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} else {
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None
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}
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}
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fn load(
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&mut self,
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specifier: &ModuleSpecifier,
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is_dynamic: bool,
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) -> LoadFuture {
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if let Some(node_modules_url) = self.maybe_local_node_modules_url.as_ref() {
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if specifier.as_str().starts_with(node_modules_url.as_str()) {
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return Box::pin(futures::future::ready(Ok(Some(
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LoadResponse::External {
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specifier: specifier.clone(),
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},
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))));
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}
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}
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let permissions = if is_dynamic {
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self.dynamic_permissions.clone()
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} else {
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self.root_permissions.clone()
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};
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let file_fetcher = self.file_fetcher.clone();
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let specifier = specifier.clone();
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async move {
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file_fetcher
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.fetch(&specifier, permissions)
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.await
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.map_or_else(
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|err| {
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if let Some(err) = err.downcast_ref::<std::io::Error>() {
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if err.kind() == std::io::ErrorKind::NotFound {
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return Ok(None);
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}
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} else if get_error_class_name(&err) == "NotFound" {
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return Ok(None);
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}
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Err(err)
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},
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|file| {
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Ok(Some(LoadResponse::Module {
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specifier: file.specifier,
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maybe_headers: file.maybe_headers,
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content: file.source,
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}))
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},
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)
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}
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.boxed()
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}
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}
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