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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
use std::collections::HashMap;
use std::io::ErrorKind;
use std::path::Path;
use std::path::PathBuf;
use std::sync::Arc;
use std::sync::Mutex;
use async_trait::async_trait;
use deno_ast::ModuleSpecifier;
use deno_core::anyhow::Context;
use deno_core::error::AnyError;
use deno_core::futures;
use deno_core::futures::StreamExt;
use deno_core::url::Url;
use deno_npm::NpmPackageCacheFolderId;
use deno_npm::NpmPackageId;
use deno_npm::NpmResolutionPackage;
use deno_runtime::deno_fs::FileSystem;
use deno_runtime::deno_node::NodePermissions;
use deno_runtime::deno_node::NodeResolutionMode;
use crate::npm::managed::cache::TarballCache;
/// Part of the resolution that interacts with the file system.
#[async_trait]
pub trait NpmPackageFsResolver: Send + Sync {
/// Specifier for the root directory.
fn root_dir_url(&self) -> &Url;
/// The local node_modules folder if it is applicable to the implementation.
fn node_modules_path(&self) -> Option<&PathBuf>;
fn package_folder(
&self,
package_id: &NpmPackageId,
) -> Result<PathBuf, AnyError>;
fn resolve_package_folder_from_package(
&self,
name: &str,
referrer: &ModuleSpecifier,
mode: NodeResolutionMode,
) -> Result<PathBuf, AnyError>;
fn resolve_package_cache_folder_id_from_specifier(
&self,
specifier: &ModuleSpecifier,
) -> Result<Option<NpmPackageCacheFolderId>, AnyError>;
async fn cache_packages(&self) -> Result<(), AnyError>;
fn ensure_read_permission(
&self,
permissions: &dyn NodePermissions,
path: &Path,
) -> Result<(), AnyError>;
}
#[derive(Debug)]
pub struct RegistryReadPermissionChecker {
fs: Arc<dyn FileSystem>,
cache: Mutex<HashMap<PathBuf, PathBuf>>,
registry_path: PathBuf,
}
impl RegistryReadPermissionChecker {
pub fn new(fs: Arc<dyn FileSystem>, registry_path: PathBuf) -> Self {
Self {
fs,
registry_path,
cache: Default::default(),
}
}
pub fn ensure_registry_read_permission(
&self,
permissions: &dyn NodePermissions,
path: &Path,
) -> Result<(), AnyError> {
// allow reading if it's in the node_modules
let is_path_in_node_modules = path.starts_with(&self.registry_path)
&& path
.components()
.all(|c| !matches!(c, std::path::Component::ParentDir));
if is_path_in_node_modules {
let mut cache = self.cache.lock().unwrap();
let mut canonicalize =
|path: &Path| -> Result<Option<PathBuf>, AnyError> {
match cache.get(path) {
Some(canon) => Ok(Some(canon.clone())),
None => match self.fs.realpath_sync(path) {
Ok(canon) => {
cache.insert(path.to_path_buf(), canon.clone());
Ok(Some(canon))
}
Err(e) => {
if e.kind() == ErrorKind::NotFound {
return Ok(None);
}
Err(AnyError::from(e)).with_context(|| {
format!("failed canonicalizing '{}'", path.display())
})
}
},
}
};
let Some(registry_path_canon) = canonicalize(&self.registry_path)? else {
return Ok(()); // not exists, allow reading
};
let Some(path_canon) = canonicalize(path)? else {
return Ok(()); // not exists, allow reading
};
if path_canon.starts_with(registry_path_canon) {
return Ok(());
}
}
permissions.check_read(path)
}
}
/// Caches all the packages in parallel.
pub async fn cache_packages(
packages: Vec<NpmResolutionPackage>,
tarball_cache: &Arc<TarballCache>,
) -> Result<(), AnyError> {
let mut futures_unordered = futures::stream::FuturesUnordered::new();
for package in packages {
futures_unordered.push(async move {
tarball_cache
.ensure_package(&package.id.nv, &package.dist)
.await
});
}
while let Some(result) = futures_unordered.next().await {
// surface the first error
result?;
}
Ok(())
}
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