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/**
* File-extension → LSP `languageId` map.
*
* The LSP `textDocument/didOpen` notification carries a `languageId` string
* that tells the server how to parse the document. This table is a trimmed
* port of opencode's `lsp/language.ts`, with one critical addition for this
* project: `.luau` → `"luau"`. Roblox Luau sources use the `.luau` extension,
* which standard Lua tooling does not recognise — luau-lsp expects the
* `"luau"` languageId.
*
* Extensions are looked up with their leading dot (e.g. `".luau"`). Unknown
* extensions fall back to `"plaintext"` at the call site.
*/
export const LANGUAGE_EXTENSIONS: Record<string, string> = {
// Luau (Roblox) — the reason this module exists. Keep first for visibility.
".luau": "luau",
".lua": "lua",
// A pragmatic subset of common languages, mirroring opencode's table so a
// user can point an arbitrary LSP server at this codebase and have the
// right languageId reported.
".c": "c",
".cpp": "cpp",
".cc": "cpp",
".cxx": "cpp",
".h": "c",
".hpp": "cpp",
".cs": "csharp",
".css": "css",
".dart": "dart",
".go": "go",
".html": "html",
".htm": "html",
".java": "java",
".js": "javascript",
".jsx": "javascriptreact",
".json": "json",
".jsonc": "jsonc",
".kt": "kotlin",
".kts": "kotlin",
".md": "markdown",
".markdown": "markdown",
".php": "php",
".py": "python",
".rb": "ruby",
".rs": "rust",
".scss": "scss",
".sass": "sass",
".sh": "shellscript",
".bash": "shellscript",
".zsh": "shellscript",
".sql": "sql",
".svelte": "svelte",
".swift": "swift",
".toml": "toml",
".ts": "typescript",
".tsx": "typescriptreact",
".mts": "typescript",
".cts": "typescript",
".vue": "vue",
".xml": "xml",
".yaml": "yaml",
".yml": "yaml",
".zig": "zig",
};
/**
* Resolve the LSP `languageId` for a file path's extension, falling back to
* `"plaintext"` when the extension is unknown.
*/
export function languageIdForExtension(extension: string): string {
return LANGUAGE_EXTENSIONS[extension] ?? "plaintext";
}
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