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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
use crate::args::jsr_url;
use dashmap::DashMap;
use deno_cache_dir::HttpCache;
use deno_core::parking_lot::Mutex;
use deno_core::serde_json;
use deno_core::ModuleSpecifier;
use deno_graph::packages::JsrPackageInfo;
use deno_graph::packages::JsrPackageVersionInfo;
use deno_lockfile::Lockfile;
use deno_semver::jsr::JsrPackageReqReference;
use deno_semver::package::PackageNv;
use deno_semver::package::PackageReq;
use std::borrow::Cow;
use std::sync::Arc;
use super::cache::LSP_DISALLOW_GLOBAL_TO_LOCAL_COPY;
#[derive(Debug)]
pub struct JsrResolver {
nv_by_req: DashMap<PackageReq, Option<PackageNv>>,
/// The `module_graph` field of the version infos should be forcibly absent.
/// It can be large and we don't want to store it.
info_by_nv: DashMap<PackageNv, Option<JsrPackageVersionInfo>>,
info_by_name: DashMap<String, Option<JsrPackageInfo>>,
cache: Arc<dyn HttpCache>,
}
impl JsrResolver {
pub fn from_cache_and_lockfile(
cache: Arc<dyn HttpCache>,
lockfile: Option<Arc<Mutex<Lockfile>>>,
) -> Self {
let nv_by_req = DashMap::new();
if let Some(lockfile) = lockfile {
for (req_url, nv_url) in &lockfile.lock().content.packages.specifiers {
let Some(req) = req_url.strip_prefix("jsr:") else {
continue;
};
let Some(nv) = nv_url.strip_prefix("jsr:") else {
continue;
};
let Ok(req) = PackageReq::from_str(req) else {
continue;
};
let Ok(nv) = PackageNv::from_str(nv) else {
continue;
};
nv_by_req.insert(req, Some(nv));
}
}
Self {
nv_by_req,
info_by_nv: Default::default(),
info_by_name: Default::default(),
cache: cache.clone(),
}
}
pub fn jsr_to_registry_url(
&self,
specifier: &ModuleSpecifier,
) -> Option<ModuleSpecifier> {
let req_ref = JsrPackageReqReference::from_str(specifier.as_str()).ok()?;
let req = req_ref.req().clone();
let maybe_nv = self.nv_by_req.entry(req.clone()).or_insert_with(|| {
let name = req.name.clone();
let maybe_package_info = self
.info_by_name
.entry(name.clone())
.or_insert_with(|| read_cached_package_info(&name, &self.cache));
let package_info = maybe_package_info.as_ref()?;
// Find the first matching version of the package which is cached.
let version = package_info
.versions
.keys()
.find(|v| {
if req.version_req.tag().is_some() || !req.version_req.matches(v) {
return false;
}
let nv = PackageNv {
name: name.clone(),
version: (*v).clone(),
};
self
.info_by_nv
.entry(nv.clone())
.or_insert_with(|| {
read_cached_package_version_info(&nv, &self.cache)
})
.is_some()
})
.cloned()?;
Some(PackageNv { name, version })
});
let nv = maybe_nv.as_ref()?;
let maybe_info = self
.info_by_nv
.entry(nv.clone())
.or_insert_with(|| read_cached_package_version_info(nv, &self.cache));
let info = maybe_info.as_ref()?;
let path = info.export(&normalize_export_name(req_ref.sub_path()))?;
jsr_url()
.join(&format!("{}/{}/{}", &nv.name, &nv.version, &path))
.ok()
}
pub fn lookup_export_for_path(
&self,
nv: &PackageNv,
path: &str,
) -> Option<String> {
let maybe_info = self
.info_by_nv
.entry(nv.clone())
.or_insert_with(|| read_cached_package_version_info(nv, &self.cache));
let info = maybe_info.as_ref()?;
let path = path.strip_prefix("./").unwrap_or(path);
for (export, path_) in info.exports() {
if path_.strip_prefix("./").unwrap_or(path_) == path {
return Some(export.strip_prefix("./").unwrap_or(export).to_string());
}
}
None
}
pub fn lookup_req_for_nv(&self, nv: &PackageNv) -> Option<PackageReq> {
for entry in self.nv_by_req.iter() {
let Some(nv_) = entry.value() else {
continue;
};
if nv_ == nv {
return Some(entry.key().clone());
}
}
None
}
}
fn read_cached_package_info(
name: &str,
cache: &Arc<dyn HttpCache>,
) -> Option<JsrPackageInfo> {
let meta_url = jsr_url().join(&format!("{}/meta.json", name)).ok()?;
let meta_cache_item_key = cache.cache_item_key(&meta_url).ok()?;
let meta_bytes = cache
.read_file_bytes(
&meta_cache_item_key,
None,
LSP_DISALLOW_GLOBAL_TO_LOCAL_COPY,
)
.ok()??;
serde_json::from_slice::<JsrPackageInfo>(&meta_bytes).ok()
}
fn read_cached_package_version_info(
nv: &PackageNv,
cache: &Arc<dyn HttpCache>,
) -> Option<JsrPackageVersionInfo> {
let meta_url = jsr_url()
.join(&format!("{}/{}_meta.json", &nv.name, &nv.version))
.ok()?;
let meta_cache_item_key = cache.cache_item_key(&meta_url).ok()?;
let meta_bytes = cache
.read_file_bytes(
&meta_cache_item_key,
None,
LSP_DISALLOW_GLOBAL_TO_LOCAL_COPY,
)
.ok()??;
// This is a roundabout way of deserializing `JsrPackageVersionInfo`,
// because we only want the `exports` field and `module_graph` is large.
let mut info =
serde_json::from_slice::<serde_json::Value>(&meta_bytes).ok()?;
Some(JsrPackageVersionInfo {
manifest: Default::default(), // not used by the LSP (only caching checks this in deno_graph)
exports: info.as_object_mut()?.remove("exports")?,
module_graph: None,
})
}
// TODO(nayeemrmn): This is duplicated from a private function in deno_graph
// 0.65.1. Make it public or cleanup otherwise.
fn normalize_export_name(sub_path: Option<&str>) -> Cow<str> {
let Some(sub_path) = sub_path else {
return Cow::Borrowed(".");
};
if sub_path.is_empty() || matches!(sub_path, "/" | ".") {
Cow::Borrowed(".")
} else {
let sub_path = if sub_path.starts_with('/') {
Cow::Owned(format!(".{}", sub_path))
} else if !sub_path.starts_with("./") {
Cow::Owned(format!("./{}", sub_path))
} else {
Cow::Borrowed(sub_path)
};
if let Some(prefix) = sub_path.strip_suffix('/') {
Cow::Owned(prefix.to_string())
} else {
sub_path
}
}
}
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