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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
use deno_package_json::PackageJson;
use deno_package_json::PackageJsonRc;
use std::cell::RefCell;
use std::collections::HashMap;
use std::io::ErrorKind;
use std::path::Path;
use std::path::PathBuf;
use crate::errors::PackageJsonLoadError;
// use a thread local cache so that workers have their own distinct cache
thread_local! {
static CACHE: RefCell<HashMap<PathBuf, PackageJsonRc>> = RefCell::new(HashMap::new());
}
pub struct PackageJsonThreadLocalCache;
impl PackageJsonThreadLocalCache {
pub fn clear() {
CACHE.with(|cache| cache.borrow_mut().clear());
}
}
impl deno_package_json::PackageJsonCache for PackageJsonThreadLocalCache {
fn get(&self, path: &Path) -> Option<PackageJsonRc> {
CACHE.with(|cache| cache.borrow().get(path).cloned())
}
fn set(&self, path: PathBuf, package_json: PackageJsonRc) {
CACHE.with(|cache| cache.borrow_mut().insert(path, package_json));
}
}
pub struct DenoPkgJsonFsAdapter<'a>(pub &'a dyn deno_fs::FileSystem);
impl<'a> deno_package_json::fs::DenoPkgJsonFs for DenoPkgJsonFsAdapter<'a> {
fn read_to_string_lossy(
&self,
path: &Path,
) -> Result<String, std::io::Error> {
self
.0
.read_text_file_lossy_sync(path, None)
.map_err(|err| err.into_io_error())
}
}
/// Helper to load a package.json file using the thread local cache
/// in deno_node.
pub fn load_pkg_json(
fs: &dyn deno_fs::FileSystem,
path: &Path,
) -> Result<Option<PackageJsonRc>, PackageJsonLoadError> {
let result = PackageJson::load_from_path(
path,
&DenoPkgJsonFsAdapter(fs),
Some(&PackageJsonThreadLocalCache),
);
match result {
Ok(pkg_json) => Ok(Some(pkg_json)),
Err(deno_package_json::PackageJsonLoadError::Io { source, .. })
if source.kind() == ErrorKind::NotFound =>
{
Ok(None)
}
Err(err) => Err(PackageJsonLoadError(err)),
}
}
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