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denoland-deno/cli/jsr.rs

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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
use crate::args::jsr_url;
use crate::file_fetcher::FileFetcher;
use dashmap::DashMap;
use deno_core::serde_json;
use deno_graph::packages::JsrPackageInfo;
use deno_graph::packages::JsrPackageVersionInfo;
use deno_semver::package::PackageNv;
use deno_semver::package::PackageReq;
use std::sync::Arc;
/// This is similar to a subset of `JsrCacheResolver` which fetches rather than
/// just reads the cache. Keep in sync!
#[derive(Debug)]
pub struct JsrFetchResolver {
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<Arc<JsrPackageVersionInfo>>>,
info_by_name: DashMap<String, Option<Arc<JsrPackageInfo>>>,
file_fetcher: Arc<FileFetcher>,
}
impl JsrFetchResolver {
pub fn new(file_fetcher: Arc<FileFetcher>) -> Self {
Self {
nv_by_req: Default::default(),
info_by_nv: Default::default(),
info_by_name: Default::default(),
file_fetcher,
}
}
pub async fn req_to_nv(&self, req: &PackageReq) -> Option<PackageNv> {
if let Some(nv) = self.nv_by_req.get(req) {
return nv.value().clone();
}
let maybe_get_nv = || async {
let name = req.name.clone();
let package_info = self.package_info(&name).await?;
// Find the first matching version of the package.
let mut versions = package_info.versions.iter().collect::<Vec<_>>();
versions.sort_by_key(|(v, _)| *v);
let version = versions
.into_iter()
.rev()
.find(|(v, i)| {
!i.yanked
&& req.version_req.tag().is_none()
&& req.version_req.matches(v)
})
.map(|(v, _)| v.clone())?;
Some(PackageNv { name, version })
};
let nv = maybe_get_nv().await;
self.nv_by_req.insert(req.clone(), nv.clone());
nv
}
pub async fn package_info(&self, name: &str) -> Option<Arc<JsrPackageInfo>> {
if let Some(info) = self.info_by_name.get(name) {
return info.value().clone();
}
let fetch_package_info = || async {
let meta_url = jsr_url().join(&format!("{}/meta.json", name)).ok()?;
let file_fetcher = self.file_fetcher.clone();
// spawn due to the lsp's `Send` requirement
let file = deno_core::unsync::spawn(async move {
file_fetcher.fetch_bypass_permissions(&meta_url).await.ok()
})
.await
.ok()??;
serde_json::from_slice::<JsrPackageInfo>(&file.source).ok()
};
let info = fetch_package_info().await.map(Arc::new);
self.info_by_name.insert(name.to_string(), info.clone());
info
}
pub async fn package_version_info(
&self,
nv: &PackageNv,
) -> Option<Arc<JsrPackageVersionInfo>> {
if let Some(info) = self.info_by_nv.get(nv) {
return info.value().clone();
}
let fetch_package_version_info = || async {
let meta_url = jsr_url()
.join(&format!("{}/{}_meta.json", &nv.name, &nv.version))
.ok()?;
let file_fetcher = self.file_fetcher.clone();
// spawn due to the lsp's `Send` requirement
let file = deno_core::unsync::spawn(async move {
file_fetcher.fetch_bypass_permissions(&meta_url).await.ok()
})
.await
.ok()??;
partial_jsr_package_version_info_from_slice(&file.source).ok()
};
let info = fetch_package_version_info().await.map(Arc::new);
self.info_by_nv.insert(nv.clone(), info.clone());
info
}
}
/// This is a roundabout way of deserializing `JsrPackageVersionInfo`,
/// because we only want the `exports` field and `module_graph` is large.
pub fn partial_jsr_package_version_info_from_slice(
slice: &[u8],
) -> serde_json::Result<JsrPackageVersionInfo> {
let mut info = serde_json::from_slice::<serde_json::Value>(slice)?;
Ok(JsrPackageVersionInfo {
manifest: Default::default(), // not used by the LSP (only caching checks this in deno_graph)
exports: info
.as_object_mut()
.and_then(|o| o.remove("exports"))
.unwrap_or_default(),
module_graph_1: None,
module_graph_2: None,
})
}