feat(unstable): single checksum per JSR package in the lockfile (#22421)

This changes the lockfile to not store JSR specifiers in the "remote"
section. Instead a single JSR integrity is stored per package in the
lockfile, which is a hash of the version's `x.x.x_meta.json` file, which
contains hashes for every file in the package. The hashes in this file
are then compared against when loading.

Additionally, when using `{ "vendor": true }` in a deno.json, the files
can be modified without causing lockfile errors—the checksum is only
checked when copying into the vendor folder and not afterwards
(eventually we should add this behaviour for non-jsr specifiers as
well). As part of this change, the `vendor` folder creation is not
always automatic in the LSP and running an explicit cache command is
necessary. The code required to track checksums in the LSP would have
been too complex for this PR, so that all goes through deno_graph now.
The vendoring is still automatic when running from the CLI.

1 files changed, 12 insertions, 2 deletions

diff --git a/cli/lsp/cache.rs b/cli/lsp/cache.rs
index eec6433a2..e0034207d 100644
--- a/cli/lsp/cache.rs
+++ b/cli/lsp/cache.rs
@@ -11,6 +11,16 @@ 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: &Arc<dyn HttpCache>,
   specifier: &ModuleSpecifier,
@@ -123,8 +133,8 @@ impl CacheMetadata {
       return None;
     }
     let cache_key = self.cache.cache_item_key(specifier).ok()?;
-    let specifier_metadata = self.cache.read_metadata(&cache_key).ok()??;
-    let values = Arc::new(parse_metadata(&specifier_metadata.headers));
+    let headers = self.cache.read_headers(&cache_key).ok()??;
+    let values = Arc::new(parse_metadata(&headers));
     let version = calculate_fs_version_in_cache(&self.cache, specifier);
     let mut metadata_map = self.metadata.lock();
     let metadata = Metadata { values, version };