Deno v2.1.5 — Release Notes & Engineering Impact

### 2.1.5 / 2025.01.09 - feat(unstable): implement QUIC (#21942) - feat(unstable): add JS linting plugin infrastructure (#27416) - feat(unstable): add OTEL MeterProvider (#27240) - feat(unstable): no config npm:@opentelemetry/api integration (#27541) - feat(unstable): replace SpanExporter with TracerProvider (#27473) - feat(unstable): support selectors in JS lint plugins (#27452) - fix(check): line-break between diagnostic message chain entries (#27543) - fix(check): move module not found errors to typescript diagnostics (#27533) - fix(compile): analyze modules in directory specified in --include (#27296) - fix(compile): be more deterministic when compiling the same code in different directories (#27395) - fix(compile): display embedded file sizes and total (#27360) - fix(compile): output contents of embedded file system (#27302) - fix(ext/fetch): better error message when body resource is unavailable (#27429) - fix(ext/fetch): retry some http/2 errors (#27417) - fix(ext/fs): do not throw for bigint ctime/mtime/atime (#27453) - fix(ext/http): improve error message when underlying resource of request body unavailable (#27463) - fix(ext/net): update moka cache to avoid potential panic in `Deno.resolveDns` on some laptops with Ryzen CPU (#27572) - fix(ext/node): fix `fs.access`/`fs.promises.access` with `X_OK` mode parameter on Windows (#27407) - fix(ext/node): fix `os.cpus()` on Linux (#27592) - fix(ext/node): RangeError timingSafeEqual with different byteLength (#27470) - fix(ext/node): add `truncate` method to the `FileHandle` class (#27389) - fix(ext/node): add support of any length IV for aes-(128|256)-gcm ciphers (#27476) - fix(ext/node): convert brotli chunks with proper byte offset (#27455) - fix(ext/node): do not exit worker thread when there is pending async op (#27378) - fix(ext/node): have `process` global available in Node context (#27562) - fix(ext/node): make getCiphers return supported ciphers (#27466) - fix(ext/node): sort list of built-in modules alphabetically (#27410) - fix(ext/node): support createConnection option in node:http.request() (#25470) - fix(ext/node): support private key export in JWK format (#27325) - fix(ext/web): add `[[ErrorData]]` slot to `DOMException` (#27342) - fix(ext/websocket): Fix close code without reason (#27578) - fix(jsr): Wasm imports fail to load (#27594) - fix(kv): improve backoff error message and inline documentation (#27537) - fix(lint): fix single char selectors being ignored (#27576) - fix(lockfile): include dependencies listed in external import map in lockfile (#27337) - fix(lsp): css preprocessor formatting (#27526) - fix(lsp): don't skip dirs with enabled subdirs (#27580) - fix(lsp): include "node:" prefix for node builtin auto-imports (#27404) - fix(lsp): respect "typescript.suggestionActions.enabled" setting (#27373) - fix(lsp): rewrite imports for 'Move to a new file' action (#27427) - fix(lsp): sql and component file formatting (#27350) - fix(lsp): use verbatim specifier for URL auto-imports (#27605) - fix(no-slow-types): handle rest param with internal assignments (#27581) - fix(node/fs): add a chmod method to the FileHandle class (#27522) - fix(node): add missing `inspector/promises` (#27491) - fix(node): handle cjs exports with escaped chars (#27438) - fix(npm): deterministically output tags to initialized file (#27514) - fix(npm): search node_modules folder for package matching npm specifier (#27345) - fix(outdated): ensure "Latest" version is greater than "Update" version (#27390) - fix(outdated): support updating dependencies in external import maps (#27339) - fix(permissions): implicit `--allow-import` when using `--cached-only` (#27530) - fix(publish): infer literal types in const contexts (#27425) - fix(task): properly handle task name wildcards with --recursive (#27396) - fix(task): support tasks without commands (#27191) - fix(unstable): don't error on non-existing attrs or type attr (#27456) - fix: FastString v8_string() should error when cannot allocated (#27375) - fix: deno_resolver crate without 'sync' feature (#27403) - fix: incorrect memory info free/available bytes on mac (#27460) - fix: upgrade deno_doc to 0.161.3 (#27377) - perf(fs/windows): stat - only open file once (#27487) - perf(node/fs/copy): reduce metadata lookups copying directory (#27495) - perf: don't store duplicate info for ops in the snapshot (#27430) - perf: remove now needless canonicalization getting closest package.json (#27437) - perf: upgrade to deno_semver 0.7 (#27426)