nvim: move packer autocmd back; remove detect-language.nvim

The plugins' configurations are lazy-loaded, so better not doing the
autocmd early (improve startup time a little bit)

roles/nvim/files/nvim/lua/autocmd.lua

@@ -57,18 +57,12 @@ local augroups = {
         {'FileType', 'markdown', 'lua WhichkeyMarkdown()'}
     },
     plugins = {
-        -- Re-compile packer_compile.lua on config changed
-        {'BufWritePost', '*.lua', 'lua Packer_compile_on_save()'},
         -- Autohide tabline on dashboard
         {'FileType', 'alpha', 'set showtabline=0 | autocmd BufUnload <buffer> set showtabline=2'},
         -- Wrap in Telescope preview window
         {'User', 'TelescopePreviewerLoaded', 'setlocal wrap'},
         -- Lsp lightbulb
         {'CursorHold', '*', 'lua Lightbulb_codeaction()'},
-        -- Refresh indent blankline more often (since it is lazy-loaded)
-        -- {'CursorMoved', '* IndentBlanklineRefresh'},
-        -- Auto-detect syntax
-        -- {'BufNewFile', '* DetectLanguageBufEnable'},
         -- Change directory more eagerly
         -- {'BufEnter', '* lua Set_window_project_dir()'}
     }

roles/nvim/files/nvim/lua/modules/core/pack.lua

@@ -50,6 +50,7 @@ packer.init {
     luarocks = {python_cmd = 'python3'}
 }
 
+-- Re-compile packer_compile.lua on config changed
 function Packer_compile_on_save()
     local file = fn.expand('%:p')
     local filename = fn.expand('%:p:t')
@@ -59,5 +60,13 @@ function Packer_compile_on_save()
         cmd('source <afile> | PackerCompile')
     end
 end
+vim.api.nvim_exec(
+[[
+augroup packer
+autocmd!
+autocmd BufWritePost *.lua lua Packer_compile_on_save()
+augroup END
+]],
+false)
 
 return packer

roles/nvim/files/nvim/lua/modules/editor/config.lua

@@ -217,10 +217,6 @@ function M.treesitter()
     require('mappings').treesitter()
 end
 
--- function M.detect_language()
---     require('detect-language').setup()
--- end
-
 -- function M.spellsitter()
 --     require('spellsitter').setup {
 --         -- Whether enabled, can be a list of filetypes, e.g. {'python', 'lua'}

roles/nvim/files/nvim/lua/modules/editor/plugins.lua

@@ -37,10 +37,6 @@ M['p00f/nvim-ts-rainbow'] = {after = 'nvim-treesitter'}
 M['windwp/nvim-ts-autotag'] = {after = 'nvim-treesitter'}
 M['romgrk/nvim-treesitter-context'] = {after = 'nvim-treesitter'}
 M['JoosepAlviste/nvim-ts-context-commentstring'] = {after = 'nvim-treesitter'}
--- M['spywhere/detect-language.nvim'] = {
---     event = 'BufNewFile',
---     config = conf.detect_language
--- }
 -- M['lewis6991/spellsitter.nvim'] = {
 --     event = {'BufRead', 'BufNewFile'},
 --     config = conf.spellsitter