feat/refacto: improve configurations

- You should now get the configs through functions
- Configs for languages are now inside a local object called parsers
- You can get the parser installation configurations with `get_parser_configs`
- A new object has been initialized inside configs to specify module config (called config).
- Provide functions to enable/disable a module on one buffer
- Provide functions to enable/disable a module on all buffers, and if filetype is
  specified, for specific filetype
- Provide function to determine if module is activated for a specified filetype

lua/nvim-treesitter.lua

@@ -1,30 +1,28 @@
 local api = vim.api
 local parsers = require'nvim-treesitter.parsers'
-local configs = require 'nvim-treesitter.configs'
 local install = require'nvim-treesitter.install'
 local locals = require'nvim-treesitter.locals'
-local highlight = require'nvim-treesitter.highlight'
+local utils = require'nvim-treesitter.utils'
+local info = require'nvim-treesitter.info'
+local configs = require'nvim-treesitter.configs'
 
 local M = {}
 
-function M.available_parsers()
-  return vim.tbl_keys(configs.repositories)
-end
-
 -- This function sets up everythin needed for a given language
 -- this is the main interface through the plugin
 function M.setup(lang)
-  if parsers.has_parser(lang) then
-    local autocmd = "autocmd NvimTreesitter FileType %s lua require'nvim-treesitter.highlight'.setup()"
-    api.nvim_command(string.format(autocmd, lang))
+  utils.setup_commands('install', install.commands)
+  utils.setup_commands('info', info.commands)
+  utils.setup_commands('configs', configs.commands)
+
+  for _, ft in pairs(configs.available_parsers()) do
+    for _, mod in pairs(configs.available_modules()) do
+      if parsers.has_parser(ft) and configs.is_enabled(mod, ft) then
+        local cmd = string.format("lua require'nvim-treesitter.%s'.attach()", mod)
+        api.nvim_command(string.format("autocmd FileType %s %s", ft, cmd))
+      end
+    end
   end
 end
 
--- This function initialize the plugin
--- it is run at startup
-M._root = {}
-function M._root.setup()
-  install.setup()
-end
-
 return M

lua/nvim-treesitter/configs.lua

@@ -1,88 +1,343 @@
-local M = {}
+local api = vim.api
+local queries = require'nvim-treesitter.query'
+local parser_utils = require'nvim-treesitter.parsers'
+local parsers = {}
 
-M.repositories = {
-  javascript = {
+parsers.javascript = {
+  install_info = {
     url = "https://github.com/tree-sitter/tree-sitter-javascript",
     files = { "src/parser.c", "src/scanner.c" },
-  },
-  c = {
+  }
+}
+
+parsers.c = {
+  install_info = {
     url = "https://github.com/tree-sitter/tree-sitter-c",
     files = { "src/parser.c" }
-  },
-  cpp = {
+  }
+}
+
+parsers.cpp = {
+  install_info = {
     url = "https://github.com/tree-sitter/tree-sitter-cpp",
     files = { "src/parser.c", "src/scanner.cc" }
-  },
-  rust = {
+  }
+}
+
+parsers.rust = {
+  install_info = {
     url = "https://github.com/tree-sitter/tree-sitter-rust",
     files = { "src/parser.c", "src/scanner.c" },
-  },
-  lua = {
+  }
+}
+
+parsers.lua = {
+  install_info = {
     url = "https://github.com/nvim-treesitter/tree-sitter-lua",
     files = { "src/parser.c", "src/scanner.cc" }
-  },
-  python = {
+  }
+}
+
+parsers.python = {
+  install_info = {
     url = "https://github.com/tree-sitter/tree-sitter-python",
     files = { "src/parser.c", "src/scanner.cc" },
-  },
-  go = {
+  }
+}
+
+parsers.go = {
+  install_info = {
     url = "https://github.com/tree-sitter/tree-sitter-go",
     files = { "src/parser.c" },
-  },
-  ruby = {
+  }
+}
+
+parsers.ruby = {
+  install_info = {
     url = "https://github.com/tree-sitter/tree-sitter-ruby",
     files = { "src/parser.c", "src/scanner.cc" },
-  },
-  bash = {
+  }
+}
+
+parsers.bash = {
+  install_info = {
     url = "https://github.com/tree-sitter/tree-sitter-bash",
     files = { "src/parser.c", "src/scanner.cc" },
-  },
-  php = {
+  }
+}
+
+parsers.php = {
+  install_info = {
     url = "https://github.com/tree-sitter/tree-sitter-php",
     files = { "src/parser.c", "src/scanner.cc" },
-  },
-  java = {
+  }
+}
+
+parsers.java = {
+  install_info = {
     url = "https://github.com/tree-sitter/tree-sitter-java",
     files = { "src/parser.c" },
-  },
-  html = {
+  }
+}
+
+parsers.html = {
+  install_info = {
     url = "https://github.com/tree-sitter/tree-sitter-html",
     files = { "src/parser.c", "src/scanner.cc" },
-  },
-  julia = {
+  }
+}
+
+parsers.julia = {
+  install_info = {
     url = "https://github.com/tree-sitter/tree-sitter-julia",
     files = { "src/parser.c", "src/scanner.c" },
-  },
-  json = {
+  }
+}
+
+parsers.json = {
+  install_info = {
     url = "https://github.com/tree-sitter/tree-sitter-json",
     files = { "src/parser.c" },
-  },
-  css = {
+  }
+}
+
+parsers.css = {
+  install_info = {
     url = "https://github.com/tree-sitter/tree-sitter-css",
     files = { "src/parser.c", "src/scanner.c" },
-  },
-  ocaml = {
+  }
+}
+
+parsers.ocaml = {
+  install_info = {
     url = "https://github.com/tree-sitter/tree-sitter-ocaml",
     files = { "src/parser.c", "src/scanner.cc" },
-  },
-  swift = {
+  }
+}
+
+parsers.swift = {
+  install_info = {
     url = "https://github.com/tree-sitter/tree-sitter-swift",
     files = { "src/parser.c" },
-  },
-  csharp = {
+  }
+}
+
+parsers.csharp = {
+  install_info = {
     url = "https://github.com/tree-sitter/tree-sitter-c-sharp",
     files = { "src/parser.c", "src/scanner.c" },
-  },
-  typescript = {
+  }
+}
+
+parsers.typescript = {
+  install_info = {
     url = "https://github.com/tree-sitter/tree-sitter-typescript",
     files = { "src/parser.c", "src/scanner.c" },
     location = "tree-sitter-typescript/typescript"
-  },
-  tsx = {
+  }
+}
+
+parsers.tsx = {
+  install_info = {
     url = "https://github.com/tree-sitter/tree-sitter-typescript",
     files = { "src/parser.c", "src/scanner.c" },
     location = "tree-sitter-tsx/tsx"
   }
 }
 
+-- @enable can be true or false
+-- @disable is a list of languages, only relevant if enable is true
+-- @keymaps list of user mappings for a given module if relevant
+-- @is_supported function which, given a ft, will return true if the ft works on the module
+local config = {
+  highlight = {
+    enable = false,
+    disable = {},
+    is_supported = function(ft)
+      return queries.get_query(ft, 'highlights') ~= nil
+    end
+  },
+  -- selection = {
+  --   enable = false,
+  --   disable = {},
+  --   keymaps = {},
+  --   is_supported = function() return false end
+  -- },
+  -- folding = {
+  --   enable = false,
+  --   disable = {},
+  --   keymaps = {},
+  --   is_supported = function() return false end
+  -- }
+}
+
+local M = {}
+
+local function enable_module(mod, bufnr, ft)
+  local bufnr = bufnr or api.nvim_get_current_buf()
+  local ft = ft or api.nvim_buf_get_option(bufnr, 'ft')
+  if not parsers[ft] or not config[mod] then
+    return
+  end
+
+  local loaded_mod = require(string.format("nvim-treesitter.%s", mod))
+  loaded_mod.attach(bufnr, ft)
+end
+
+local function enable_mod_conf_autocmd(mod, ft)
+  if not config[mod] or M.is_enabled(mod, ft) then return end
+
+  local cmd = string.format("lua require'nvim-treesitter.%s'.attach()", mod)
+  api.nvim_command(string.format("autocmd FileType %s %s", ft, cmd))
+  for i, parser in pairs(config[mod].disable) do
+    if parser == ft then
+      table.remove(config[mod].disable, i)
+      break
+    end
+  end
+end
+
+local function enable_all(mod, ft)
+  if not config[mod] then return end
+
+  for _, bufnr in pairs(api.nvim_list_bufs()) do
+    if not ft or api.nvim_buf_get_option(bufnr, 'ft') == ft then
+      enable_module(mod, bufnr, ft)
+    end
+  end
+  if ft then
+    enable_mod_conf_autocmd(mod, ft)
+  else
+    for _, ft in pairs(M.available_parsers()) do
+      if parser_utils.has_parser(ft) then
+        enable_mod_conf_autocmd(mod, ft)
+      end
+    end
+  end
+  config[mod].enable = true
+end
+
+local function disable_module(mod, bufnr, ft)
+  local bufnr = bufnr or api.nvim_get_current_buf()
+  local ft = ft or api.nvim_buf_get_option(bufnr, 'ft')
+  if not parsers[ft] or not config[mod] then
+    return
+  end
+
+  local loaded_mod = require(string.format("nvim-treesitter.%s", mod))
+  loaded_mod.detach(bufnr, ft)
+end
+
+local function disable_mod_conf_autocmd(mod, ft)
+  if not config[mod] or not M.is_enabled(mod, ft) then return end
+
+  api.nvim_command(string.format("autocmd! FileType %s", ft))
+  table.insert(config[mod].disable, ft)
+end
+
+local function disable_all(mod, ft)
+  for _, bufnr in pairs(api.nvim_list_bufs()) do
+    if not ft or api.nvim_buf_get_option(bufnr, 'ft') == ft then
+      disable_module(mod, bufnr, ft)
+    end
+  end
+  if ft then
+    disable_mod_conf_autocmd(mod, ft)
+  else
+    for _, ft in pairs(M.available_parsers()) do
+      if parser_utils.has_parser(ft) then
+        disable_mod_conf_autocmd(mod, ft)
+      end
+    end
+    config[mod].enable = false
+  end
+end
+
+M.commands = {
+  TSBufEnable = {
+    run = enable_module,
+    args = {
+      "-nargs=1",
+      "-complete=custom,v:lua.ts_available_modules"
+    },
+    description = '`:TSBufEnable module_name` enable a specified module on the current buffer'
+  },
+  TSBufDisable = {
+    run = disable_module,
+    args = {
+      "-nargs=1",
+      "-complete=custom,v:lua.ts_available_modules"
+    },
+    description = '`:TSBufDisable module_name` disable a specified module on the current buffer'
+  },
+  TSEnableAll = {
+    run = enable_all,
+    args = {
+      "-nargs=+",
+      "-complete=custom,v:lua.ts_available_modules"
+    },
+    description = '`:TSEnableAll module_name (filetype)` enables a specified module on all buffers. If filetype is specified, enable only for specified filetype'
+  },
+  TSDisableAll = {
+    run = disable_all,
+    args = {
+      "-nargs=+",
+      "-complete=custom,v:lua.ts_available_modules"
+    },
+    description = '`:TSDisableAll module_name (filetype)` disables a specified module on all buffers. If filetype is specified, disable only for specified filetype'
+  },
+}
+
+-- @param mod: module (string)
+-- @param ft: filetype (string)
+function M.is_enabled(mod, ft)
+  if not M.get_parser_configs()[ft] then return false end
+
+  local module_config = M.get_config()[mod]
+  if not module_config then return false end
+
+  if not module_config.enable or not module_config.is_supported(ft) then
+    return false
+  end
+
+  for _, parser in pairs(module_config.disable) do
+    if ft == parser then return false end
+  end
+  return true
+end
+
+function M.setup(user_data)
+  if not user_data then return end
+
+  for mod, data in pairs(user_data) do
+    if config[mod] then
+      if type(data.enable) == 'boolean' then
+        config[mod].enable = data.enable
+      end
+      if type(data.disable) == 'table' then
+        config[mod].disable = data.disable
+      end
+      if config[mod].keymaps and type(data.keymaps) == 'table' then
+        config[mod].keymaps = data.keymaps
+      end
+    end
+  end
+end
+
+function M.get_config()
+  return config
+end
+
+function M.get_parser_configs()
+  return parsers
+end
+
+function M.available_parsers()
+  return vim.tbl_keys(parsers)
+end
+
+function M.available_modules()
+  return vim.tbl_keys(config)
+end
+
 return M

lua/nvim-treesitter/health.lua

@@ -13,7 +13,7 @@ local health_error = vim.fn['health#report_error']
 
 local M = {}
 
-local function configs_health()
+local function install_health()
   if fn.executable('git') == 0 then
     health_error('`git` executable not found.', {
         'Install it with your package manager.',
@@ -38,11 +38,11 @@ end
 function M.checkhealth()
   -- Installation dependency checks
   health_start('Installation')
-  configs_health()
+  install_health()
 
   local missing_parsers = {}
   -- Parser installation checks
-  for parser_name in pairs(configs.repositories) do
+  for _, parser_name in pairs(configs.available_parsers()) do
     local installed = #api.nvim_get_runtime_file('parser/'..parser_name..'.so', false)
 
     -- Only print informations about installed parsers

lua/nvim-treesitter/highlight.lua

@@ -1,12 +1,12 @@
 local api = vim.api
-local queries = require'nvim-treesitter.query'
 local ts = vim.treesitter
+local queries = require'nvim-treesitter.query'
 
 local M = {
-  highlighters={}
+  highlighters = {}
 }
 
-function M.setup(bufnr, ft)
+function M.attach(bufnr, ft)
   local buf = bufnr or api.nvim_get_current_buf()
   local ft = ft or api.nvim_buf_get_option(buf, 'ft')
 
@@ -16,4 +16,13 @@ function M.setup(bufnr, ft)
   M.highlighters[buf] = ts.TSHighlighter.new(query, buf, ft)
 end
 
+function M.detach(bufnr)
+  local buf = bufnr or api.nvim_get_current_buf()
+  if M.highlighters[buf] then
+    M.highlighters[buf]:set_query("")
+    M.highlighters[buf] = nil
+  end
+  api.nvim_buf_set_option(buf, 'syntax', 'on')
+end
+
 return M

lua/nvim-treesitter/info.lua

@@ -0,0 +1,96 @@
+local api = vim.api
+local configs = require'nvim-treesitter.configs'
+
+local M = {}
+
+local function install_info()
+  local max_len = 0
+  for _, ft in pairs(configs.available_parsers()) do
+    if #ft > max_len then max_len = #ft end
+  end
+
+  for _, ft in pairs(configs.available_parsers()) do
+    local is_installed = #api.nvim_get_runtime_file('parser/'..ft..'.so', false) > 0
+    api.nvim_out_write(ft..string.rep(' ', max_len - #ft + 1))
+    if is_installed then
+      api.nvim_out_write("[✓] installed\n")
+    else
+      api.nvim_out_write("[✗] not installed\n")
+    end
+  end
+end
+
+local function print_info_module(sorted_filetypes, mod)
+  local max_str_len = #sorted_filetypes[1]
+  local header = string.format('%s%s', string.rep(' ', max_str_len + 2), mod)
+  api.nvim_out_write(header..'\n')
+  for _, ft in pairs(sorted_filetypes) do
+    local padding = string.rep(' ', max_str_len - #ft + #mod / 2 + 1)
+    api.nvim_out_write(ft..":"..padding)
+    if configs.is_enabled(mod, ft) then
+      api.nvim_out_write('✓')
+    else
+      api.nvim_out_write('✗')
+    end
+    api.nvim_out_write('\n')
+  end
+end
+
+local function print_info_modules(sorted_filetypes)
+  local max_str_len = #sorted_filetypes[1]
+  local header = string.rep(' ', max_str_len + 2)
+  for _, mod in pairs(configs.available_modules()) do
+    header = string.format('%s%s ', header, mod)
+  end
+  api.nvim_out_write(header..'\n')
+
+  for _, ft in pairs(sorted_filetypes) do
+    local padding = string.rep(' ', max_str_len - #ft)
+    api.nvim_out_write(ft..":"..padding)
+
+    for _, mod in pairs(configs.available_modules()) do
+      local pad_len = #mod / 2 + 1
+      api.nvim_out_write(string.rep(' ', pad_len))
+
+      if configs.is_enabled(mod, ft) then
+        api.nvim_out_write('✓')
+      else
+        api.nvim_out_write('✗')
+      end
+      api.nvim_out_write(string.rep(' ', pad_len - 1))
+    end
+    api.nvim_out_write('\n')
+  end
+end
+
+local function module_info(mod)
+  if mod and not configs.get_config()[mod] then return end
+
+  local ft_by_len = configs.available_parsers()
+  table.sort(ft_by_len, function(a, b) return #a > #b end)
+  if mod then
+    print_info_module(ft_by_len, mod)
+  else
+    print_info_modules(ft_by_len)
+  end
+end
+
+M.commands = {
+  TSInstallInfo = {
+    run = install_info,
+    args = {
+      "-nargs=0",
+    },
+    description = '`:TSInstallInfo` print installation state for every filetype'
+  },
+  TSModuleInfo = {
+    run = module_info,
+    args = {
+      "-nargs=?",
+      "-complete=custom,v:lua.ts_available_modules"
+    },
+    description = '`:TSModuleInfo` print module state for every filetype, if module is specified, only for current module'
+  }
+}
+
+return M

lua/nvim-treesitter/install.lua

@@ -1,7 +1,8 @@
 local api = vim.api
 local fn = vim.fn
 local luv = vim.loop
-local repositories = require'nvim-treesitter/configs'.repositories
+local configs = require'nvim-treesitter/configs'
+local parsers = configs.get_parser_configs()
 
 local M = {}
 
@@ -118,14 +119,15 @@ local function install(ft)
     if not string.match(yesno, '^y.*') then return end
   end
 
-  local repository = repositories[ft]
-  if not repository then
+  local parser_config = parsers[ft]
+  if not parser_config then
     return api.nvim_err_writeln('Parser not available for language '..ft)
   end
 
+  local install_info = parser_config.install_info
   vim.validate {
-    url={ repository.url, 'string' },
-    files={ repository.files, 'table' }
+    url={ install_info.url, 'string' },
+    files={ install_info.files, 'table' }
   }
 
   if fn.executable('git') == 0 then
@@ -138,24 +140,7 @@ local function install(ft)
   local cache_folder, err = get_cache_dir()
   if err then return api.nvim_err_writeln(err) end
 
-  run_install(cache_folder, package_path, ft, repository)
-end
-
-local function install_info()
-  local max_len = 0
-  for parser_name, _ in pairs(repositories) do
-    if #parser_name > max_len then max_len = #parser_name end
-  end
-
-  for parser_name, _ in pairs(repositories) do
-    local is_installed = #api.nvim_get_runtime_file('parser/'..parser_name..'.so', false) > 0
-    api.nvim_out_write(parser_name..string.rep(' ', max_len - #parser_name + 1))
-    if is_installed then
-      api.nvim_out_write("[✓] installed\n")
-    else
-      api.nvim_out_write("[✗] not installed\n")
-    end
-  end
+  run_install(cache_folder, package_path, ft, install_info)
 end
 
 M.commands = {
@@ -166,25 +151,7 @@ M.commands = {
       "-complete=custom,v:lua.ts_installable_parsers"
     },
     description = '`:TSInstall {ft}` installs a parser under nvim-treesitter/parser/{name}.so'
-  },
-  TSInstallInfo = {
-    run = install_info,
-    args = { "-nargs=0" },
-    description = '`:TSInstallInfo` print installation state for every filetype'
   }
 }
 
-function M.setup()
-  for command_name, def in pairs(M.commands) do
-    local call_fn = string.format("lua require'nvim-treesitter.install'.commands.%s.run(<f-args>)", command_name)
-    local parts = vim.tbl_flatten({
-        "command!",
-        def.args,
-        command_name,
-        call_fn,
-      })
-    api.nvim_command(table.concat(parts, " "))
-  end
-end
-
 return M

lua/nvim-treesitter/utils.lua

@@ -63,4 +63,17 @@ function M.is_parent(dest, source)
   return false
 end
 
+function M.setup_commands(mod, commands)
+  for command_name, def in pairs(commands) do
+    local call_fn = string.format("lua require'nvim-treesitter.%s'.commands.%s.run(<f-args>)", mod, command_name)
+    local parts = vim.tbl_flatten({
+        "command!",
+        def.args,
+        command_name,
+        call_fn,
+      })
+    api.nvim_command(table.concat(parts, " "))
+  end
+end
+
 return M

plugin/nvim-treesitter.vim

@@ -4,14 +4,17 @@ if exists('g:loaded_nvim_treesitter')
   finish
 endif
 
-lua << EOF
-ts_installable_parsers = function()
-  return table.concat(require'nvim-treesitter'.available_parsers(), '\n')
-end
-require'nvim-treesitter'._root.setup()
-EOF
+augroup NvimTreesitter
+augroup END
 
 let g:loaded_nvim_treesitter = 1
 
-augroup NvimTreesitter
-augroup END
+lua << EOF
+ts_installable_parsers = function()
+  return table.concat(require'nvim-treesitter.configs'.available_parsers(), '\n')
+end
+ts_available_modules = function()
+  return table.concat(require'nvim-treesitter.configs'.available_modules(), '\n')
+end
+require'nvim-treesitter'.setup()
+EOF