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local a = vim.api
local M = {}
--- Asserts that a parser for the language {lang} is installed.
---
--- Parsers are searched in the `parser` runtime directory, or the provided {path}
---
---@param lang string Language the parser should parse (alphanumerical and `_` only)
---@param path (string|nil) Optional path the parser is located at
---@param silent (boolean|nil) Don't throw an error if language not found
---@param symbol_name (string|nil) Internal symbol name for the language to load
---@return boolean If the specified language is installed
function M.require_language(lang, path, silent, symbol_name)
if vim._ts_has_language(lang) then
return true
end
if path == nil then
if not (lang and lang:match('[%w_]+') == lang) then
if silent then
return false
end
error("'" .. lang .. "' is not a valid language name")
end
local fname = 'parser/' .. lang .. '.*'
local paths = a.nvim_get_runtime_file(fname, false)
if #paths == 0 then
if silent then
return false
end
error("no parser for '" .. lang .. "' language, see :help treesitter-parsers")
end
path = paths[1]
end
if silent then
return pcall(function()
vim._ts_add_language(path, lang, symbol_name)
end)
else
vim._ts_add_language(path, lang, symbol_name)
end
return true
end
--- Inspects the provided language.
---
--- Inspecting provides some useful information on the language like node names, ...
---
---@param lang string Language
---@return table
function M.inspect_language(lang)
M.require_language(lang)
return vim._ts_inspect_language(lang)
end
return M
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