update

lua/plugins/none-ls.lua

@@ -1,18 +1,70 @@
 return {
-	'nvimtools/none-ls.nvim',
-    event = { 'BufReadPre', 'BufNewFile' },
-	config = function()
-		local null_ls = require('null-ls')
+    'nvimtools/none-ls.nvim', -- configure formatters & linters
+    event = { 'CursorHold', 'CursorHoldI' },
+    dependencies = {
+        'jay-babu/mason-null-ls.nvim',
+    },
+    config = function()
+        local mason_null_ls = require('mason-null-ls')
 
-		null_ls.setup({
-			sources = {
-				null_ls.builtins.formatting.stylua,
-                null_ls.builtins.formatting.prettier,
-				null_ls.builtins.formatting.clang_format,
-				null_ls.builtins.formatting.black,
-				null_ls.builtins.formatting.gdformat,
-                null_ls.builtins.formatting.djhtml,
-			},
-		})
-	end,
+        local null_ls = require('null-ls')
+
+        local null_ls_utils = require('null-ls.utils')
+
+        mason_null_ls.setup({
+            ensure_installed = {
+                'prettier', -- prettier formatter
+                'biome', -- js formatter
+                'clang-format', -- c/c++ formatter
+                'stylua', -- lua formatter
+                'black', -- python formatter
+                'pylint', -- python linter
+                -- "eslint_d", -- js linter
+            },
+        })
+
+        -- for conciseness
+        local formatting = null_ls.builtins.formatting -- to setup formatters
+        local diagnostics = null_ls.builtins.diagnostics -- to setup linters
+
+        -- to setup format on save
+        local augroup = vim.api.nvim_create_augroup('LspFormatting', {})
+
+        -- configure null_ls
+        null_ls.setup({
+            root_dir = null_ls_utils.root_pattern('.null-ls-root', 'Makefile', '.git', 'package.json'),
+            sources = {
+                formatting.prettier, -- js/ts formatter
+                formatting.stylua, -- lua formatter
+                formatting.isort,
+                formatting.black,
+                formatting.clang_format,
+                diagnostics.pylint,
+                -- diagnostics.eslint_d.with({ -- js/ts linter
+                --   condition = function(utils)
+                --     return utils.root_has_file({ ".eslintrc.js", ".eslintrc.cjs" }) -- only enable if root has .eslintrc.js or .eslintrc.cjs
+                --   end,
+                -- }),
+            },
+            -- configure format on save
+            on_attach = function(current_client, bufnr)
+                if current_client.supports_method('textDocument/formatting') then
+                    vim.api.nvim_clear_autocmds({ group = augroup, buffer = bufnr })
+                    vim.api.nvim_create_autocmd('BufWritePre', {
+                        group = augroup,
+                        buffer = bufnr,
+                        callback = function()
+                            vim.lsp.buf.format({
+                                filter = function(client)
+                                    --  only use null-ls for formatting instead of lsp server
+                                    return client.name == 'null-ls'
+                                end,
+                                bufnr = bufnr,
+                            })
+                        end,
+                    })
+                end
+            end,
+        })
+    end,
 }