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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
use crate::cache::DenoDir;
use crate::cache::GlobalHttpCache;
use crate::cache::HttpCache;
use crate::cache::LocalLspHttpCache;
use crate::lsp::config::Config;
use crate::lsp::logging::lsp_log;
use crate::lsp::logging::lsp_warn;
use deno_runtime::fs_util::specifier_to_file_path;
use deno_core::url::Url;
use deno_core::ModuleSpecifier;
use std::fs;
use std::path::Path;
use std::sync::Arc;
use std::time::SystemTime;
/// In the LSP, we disallow the cache from automatically copying from
/// the global cache to the local cache for technical reasons.
///
/// 1. We need to verify the checksums from the lockfile are correct when
/// moving from the global to the local cache.
/// 2. We need to verify the checksums for JSR https specifiers match what
/// is found in the package's manifest.
pub const LSP_DISALLOW_GLOBAL_TO_LOCAL_COPY: deno_cache_dir::GlobalToLocalCopy =
deno_cache_dir::GlobalToLocalCopy::Disallow;
pub fn calculate_fs_version(
cache: &LspCache,
specifier: &ModuleSpecifier,
) -> Option<String> {
match specifier.scheme() {
"npm" | "node" | "data" | "blob" => None,
"file" => specifier_to_file_path(specifier)
.ok()
.and_then(|path| calculate_fs_version_at_path(&path)),
_ => calculate_fs_version_in_cache(cache, specifier),
}
}
/// Calculate a version for for a given path.
pub fn calculate_fs_version_at_path(path: &Path) -> Option<String> {
let metadata = fs::metadata(path).ok()?;
if let Ok(modified) = metadata.modified() {
if let Ok(n) = modified.duration_since(SystemTime::UNIX_EPOCH) {
Some(n.as_millis().to_string())
} else {
Some("1".to_string())
}
} else {
Some("1".to_string())
}
}
fn calculate_fs_version_in_cache(
cache: &LspCache,
specifier: &ModuleSpecifier,
) -> Option<String> {
let http_cache = cache.root_vendor_or_global();
let Ok(cache_key) = http_cache.cache_item_key(specifier) else {
return Some("1".to_string());
};
match http_cache.read_modified_time(&cache_key) {
Ok(Some(modified)) => {
match modified.duration_since(SystemTime::UNIX_EPOCH) {
Ok(n) => Some(n.as_millis().to_string()),
Err(_) => Some("1".to_string()),
}
}
Ok(None) => None,
Err(_) => Some("1".to_string()),
}
}
#[derive(Debug, Clone)]
pub struct LspCache {
deno_dir: DenoDir,
global: Arc<GlobalHttpCache>,
root_vendor: Option<Arc<LocalLspHttpCache>>,
}
impl Default for LspCache {
fn default() -> Self {
Self::new(None)
}
}
impl LspCache {
pub fn new(global_cache_url: Option<Url>) -> Self {
let global_cache_path = global_cache_url.and_then(|s| {
specifier_to_file_path(&s)
.inspect(|p| {
lsp_log!("Resolved global cache path: \"{}\"", p.to_string_lossy());
})
.inspect_err(|err| {
lsp_warn!("Failed to resolve custom cache path: {err}");
})
.ok()
});
let deno_dir = DenoDir::new(global_cache_path)
.expect("should be infallible with absolute custom root");
let global = Arc::new(GlobalHttpCache::new(
deno_dir.deps_folder_path(),
crate::cache::RealDenoCacheEnv,
));
Self {
deno_dir,
global,
root_vendor: None,
}
}
pub fn update_config(&mut self, config: &Config) {
self.root_vendor = config.tree.root_data().and_then(|data| {
let vendor_dir = data.vendor_dir.as_ref()?;
Some(Arc::new(LocalLspHttpCache::new(
vendor_dir.clone(),
self.global.clone(),
)))
});
}
pub fn deno_dir(&self) -> &DenoDir {
&self.deno_dir
}
pub fn global(&self) -> &Arc<GlobalHttpCache> {
&self.global
}
pub fn root_vendor(&self) -> Option<&Arc<LocalLspHttpCache>> {
self.root_vendor.as_ref()
}
pub fn root_vendor_or_global(&self) -> Arc<dyn HttpCache> {
self
.root_vendor
.as_ref()
.map(|v| v.clone() as _)
.unwrap_or(self.global.clone() as _)
}
}
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