formatter: LSP falls back to wrong oxfmt config when in workspace #20237
Description
After upgrading oxfmt, it started trying to load vite.config.ts for all vscode roots in our workspace. This meant that when it fails to load one of the config files, it fallsback to a default config for all roots instead of only the failing path. We have an existing working oxfmt config in a different folder, so this seems like a new regression.
macOS 26.3.1
node v24
oxfmt v0.38
2026-03-11 11:58:17.245 [info] 2026-03-11T15:58:17.245230Z INFO tokio-rt-worker oxc_language_server::backend: initialize: Some([WorkspaceOption { workspace_uri: Uri(Uri { scheme: "file", authority: Some(Authority { userinfo: None, host: "", host_parsed: RegName(""), port: None }), path: "/<workspace>/<service-1>", query: None, fragment: None }), options: Object {"fmt.experimental": Bool(true)} }, WorkspaceOption { workspace_uri: Uri(Uri { scheme: "file", authority: Some(Authority { userinfo: None, host: "", host_parsed: RegName(""), port: None }), path: "/<workspace>/<service-2>", query: None, fragment: None }), options: Object {"fmt.experimental": Bool(true)} }, WorkspaceOption { workspace_uri: Uri(Uri { scheme: "file", authority: Some(Authority { userinfo: None, host: "", host_parsed: RegName(""), port: None }), path: "/<workspace>/<service-3>", query: None, fragment: None }), options: Object {"fmt.experimental": Bool(true)} }, WorkspaceOption { workspace_uri: Uri(Uri { scheme: "file", authority: Some(Authority { userinfo: None, host: "", host_parsed: RegName(""), port: None }), path: "/<workspace>/<service-4>", query: None, fragment: None }), options: Object {"fmt.experimental": Bool(true)} }, WorkspaceOption { workspace_uri: Uri(Uri { scheme: "file", authority: Some(Authority { userinfo: None, host: "", host_parsed: RegName(""), port: None }), path: "/<workspace>/<service-5>", query: None, fragment: None }), options: Object {"fmt.experimental": Bool(true)} }, WorkspaceOption { workspace_uri: Uri(Uri { scheme: "file", authority: Some(Authority { userinfo: None, host: "", host_parsed: RegName(""), port: None }), path: "/<workspace>/<service-6>", query: None, fragment: None }), options: Object {"fmt.experimental": Bool(true)} }, WorkspaceOption { workspace_uri: Uri(Uri { scheme: "file", authority: Some(Authority { userinfo: None, host: "", host_parsed: RegName(""), port: None }), path: "/<workspace>/<service-7>", query: None, fragment: None }), options: Object {"fmt.experimental": Bool(true)} }, WorkspaceOption { workspace_uri: Uri(Uri { scheme: "file", authority: Some(Authority { userinfo: None, host: "", host_parsed: RegName(""), port: None }), path: "/<workspace>/<service-8>", query: None, fragment: None }), options: Object {"fmt.experimental": Bool(true)} }, WorkspaceOption { workspace_uri: Uri(Uri { scheme: "file", authority: Some(Authority { userinfo: None, host: "", host_parsed: RegName(""), port: None }), path: "/<workspace>/<service-9>", query: None, fragment: None }), options: Object {"fmt.experimental": Bool(true)} }, WorkspaceOption { workspace_uri: Uri(Uri { scheme: "file", authority: Some(Authority { userinfo: None, host: "", host_parsed: RegName(""), port: None }), path: "/<workspace>/<service-10>", query: None, fragment: None }), options: Object {"fmt.experimental": Bool(true)} }, WorkspaceOption { workspace_uri: Uri(Uri { scheme: "file", authority: Some(Authority { userinfo: None, host: "", host_parsed: RegName(""), port: None }), path: "/<workspace>", query: None, fragment: None }), options: Object {"fmt.experimental": Bool(true)} }])
2026-03-11T15:58:17.245264Z INFO tokio-rt-worker oxc_language_server::backend: oxfmt version: 0.38.0
2026-03-11 11:58:17.258 [info] [Error - 11:58:17 AM] Server process exited with code 0.
2026-03-11 11:58:17.281 [info] 2026-03-11T15:58:17.281038Z WARN tokio-rt-worker oxfmt::lsp::server_formatter: Failed to build config resolver: /<workspace>/<service-8>/vite.config.ts
Ensure the file has a valid default export of a JSON-serializable configuration object., falling back to default config