feat(api): expose list of available and installed languages

lua/nvim-treesitter/config.lua

@@ -41,7 +41,7 @@ end
 
 ---@param type 'queries'|'parsers'?
 ---@return string[]
-function M.installed_languages(type)
+function M.get_installed(type)
   local installed = {} --- @type table<string, boolean>
   if not (type and type == 'parsers') then
     for f in vim.fs.dir(M.get_install_dir('queries')) do
@@ -107,7 +107,7 @@ function M.norm_languages(languages, skip)
 
   if vim.list_contains(languages, 'all') then
     if skip and skip.missing then
-      return M.installed_languages()
+      return M.get_installed()
     end
     languages = M.get_available()
   end
@@ -115,7 +115,7 @@ function M.norm_languages(languages, skip)
   languages = expand_tiers(languages)
 
   if skip and skip.installed then
-    local installed = M.installed_languages()
+    local installed = M.get_installed()
     languages = vim.tbl_filter(
       --- @param v string
       function(v)
@@ -126,7 +126,7 @@ function M.norm_languages(languages, skip)
   end
 
   if skip and skip.missing then
-    local installed = M.installed_languages()
+    local installed = M.get_installed()
     languages = vim.tbl_filter(
       --- @param v string
       function(v)

lua/nvim-treesitter/health.lua

@@ -136,7 +136,7 @@ function M.check()
 
   -- Parser installation checks
   health.start('Installed languages' .. string.rep(' ', 5) .. 'H L F I J')
-  local languages = config.installed_languages()
+  local languages = config.get_installed()
   for _, lang in pairs(languages) do
     local parser = parsers[lang]
     local out = lang .. string.rep(' ', 22 - #lang)

lua/nvim-treesitter/init.lua

@@ -4,6 +4,14 @@ function M.setup(...)
   require('nvim-treesitter.config').setup(...)
 end
 
+function M.get_available(...)
+  return require('nvim-treesitter.config').get_available(...)
+end
+
+function M.get_installed(...)
+  return require('nvim-treesitter.config').get_installed(...)
+end
+
 function M.install(...)
   return require('nvim-treesitter.install').install(...)
 end

lua/nvim-treesitter/install.lua

@@ -402,7 +402,7 @@ local install_status = {} ---@type table<string,InstallStatus?>
 ---@param generate? boolean
 ---@return InstallStatus status
 local function install_lang(lang, cache_dir, install_dir, force, generate)
-  if not force and vim.list_contains(config.installed_languages(), lang) then
+  if not force and vim.list_contains(config.get_installed(), lang) then
     install_status[lang] = 'installed'
     return 'installed'
   end
@@ -537,7 +537,7 @@ M.uninstall = a.async(function(languages)
 
   local parser_dir = config.get_install_dir('parser')
   local query_dir = config.get_install_dir('queries')
-  local installed = config.installed_languages()
+  local installed = config.get_installed()
 
   local task_funs = {} ---@type async.TaskFun[]
   local done = 0