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lua/user/lsp/null-ls.lua

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+local null_ls_status_ok, null_ls = pcall(require, "null-ls")
+if not null_ls_status_ok then
+	return
+end
+
+-- https://github.com/jose-elias-alvarez/null-ls.nvim/tree/main/lua/null-ls/builtins/formatting
+local formatting = null_ls.builtins.formatting
+-- https://github.com/jose-elias-alvarez/null-ls.nvim/tree/main/lua/null-ls/builtins/diagnostics
+local diagnostics = null_ls.builtins.diagnostics
+
+local augroup = vim.api.nvim_create_augroup("LspFormatting", {})
+
+null_ls.setup({
+	debug = false,
+	sources = {
+		--formatting.prettier.with({ extra_args = { "--no-semi", "--single-quote", "--jsx-single-quote" } }),
+		formatting.prettier,
+		formatting.prettierd,
+		formatting.black.with({ extra_args = { "--fast" } }),
+		formatting.stylua,
+		formatting.eslint_d,
+		formatting.google_java_format,
+		formatting.phpcbf,
+		-- formatting.clang_format,
+		-- diagnostics.flake8
+	},
+
+	on_attach = function(client, bufnr)
+		--if client.resolved_capabilities.document_formatting then
+		--vim.cmd("autocmd BufWritePre <buffer> lua vim.lsp.buf.format{async=true}")
+		--end
+		if 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({ bufnr = bufnr })
+					-- vim.lsp.buf.formatting_sync()
+				end,
+			})
+		end
+	end,
+})