try kickstart nvim

[dotfiles.git] / stow / nvim / .config / nvim / lua / autoformat.lua

diff --git a/stow/nvim/.config/nvim/lua/autoformat.lua b/stow/nvim/.config/nvim/lua/autoformat.lua
new file mode 100644 (file)
index 0000000..7d49be7
--- /dev/null
+++ b/stow/nvim/.config/nvim/lua/autoformat.lua
@@ -0,0 +1,74 @@
+-- autoformat.lua
+--
+-- Use your language server to automatically format your code on save.
+-- Adds additional commands as well to manage the behavior
+
+return {
+  'neovim/nvim-lspconfig',
+  config = function()
+    -- Switch for controlling whether you want autoformatting.
+    --  Use :KickstartFormatToggle to toggle autoformatting on or off
+    local format_is_enabled = true
+    vim.api.nvim_create_user_command('KickstartFormatToggle', function()
+      format_is_enabled = not format_is_enabled
+      print('Setting autoformatting to: ' .. tostring(format_is_enabled))
+    end, {})
+
+    -- Create an augroup that is used for managing our formatting autocmds.
+    --      We need one augroup per client to make sure that multiple clients
+    --      can attach to the same buffer without interfering with each other.
+    local _augroups = {}
+    local get_augroup = function(client)
+      if not _augroups[client.id] then
+        local group_name = 'kickstart-lsp-format-' .. client.name
+        local id = vim.api.nvim_create_augroup(group_name, { clear = true })
+        _augroups[client.id] = id
+      end
+
+      return _augroups[client.id]
+    end
+
+    -- Whenever an LSP attaches to a buffer, we will run this function.
+    --
+    -- See `:help LspAttach` for more information about this autocmd event.
+    vim.api.nvim_create_autocmd('LspAttach', {
+      group = vim.api.nvim_create_augroup('kickstart-lsp-attach-format', { clear = true }),
+      -- This is where we attach the autoformatting for reasonable clients
+      callback = function(args)
+        local client_id = args.data.client_id
+        local client = vim.lsp.get_client_by_id(client_id)
+        local bufnr = args.buf
+
+        -- Only attach to clients that support document formatting
+        if not client.server_capabilities.documentFormattingProvider then
+          return
+        end
+
+        -- Tsserver usually works poorly. Sorry you work with bad languages
+        -- You can remove this line if you know what you're doing :)
+        --  if client.name == 'tsserver' then
+        --    return
+        --  end
+
+        -- Create an autocmd that will run *before* we save the buffer.
+        --  Run the formatting command for the LSP that has just attached.
+        vim.api.nvim_create_autocmd('BufWritePre', {
+          group = get_augroup(client),
+          buffer = bufnr,
+          callback = function()
+            if not format_is_enabled then
+              return
+            end
+
+            vim.lsp.buf.format {
+              async = false,
+              filter = function(c)
+                return c.id == client.id
+              end,
+            }
+          end,
+        })
+      end,
+    })
+  end,
+}