feat: migrate to vim.lsp.config #3659

Problem:
Nvim 0.11 has vim.lsp.config, which mostly replaces the legacy
nvim-lspconfig "framework".

Solution:
Migrate all configs to `lsp/*` variants. The old configs in
`lua/lspconfig/` are "frozen".

The new configs include these changes:
- `commands` field became raw calls to
  `vim.api.nvim_buf_create_user_command` inside `on_attach`.
- `root_dir` became:
  - `root_markers` whenever the file list was simple didn't need to mach `*`
  - if the logic was complicated, or needed to match something like
    '\*.c', it was defined as a vim.lsp.Config `root_dir` callback.
- `on_config_change` became `before_init`. I don't actually know if this
  is the correct approach, but looking around the documentation of
  `nvim-lspconfig` a saw that it was defined as the function that gets
  called as soon as the config have `root_dir`, and so I thought
  `before_init` might be the closest alternative.
- `docs.description` became a luadoc `@brief` docstring.
- `single_file_support = false`?

Co-authored-by: Aliou Diallo <aliou@users.noreply.github.com>
Co-authored-by: Justin M. Keyes <justinkz@gmail.com>

1 files changed, 37 insertions, 0 deletions

diff --git a/lsp/css_variables.lua b/lsp/css_variables.lua
new file mode 100644
index 00000000..a56827b4
--- /dev/null
+++ b/lsp/css_variables.lua
@@ -0,0 +1,37 @@
+---@brief
+---
+---https://github.com/vunguyentuan/vscode-css-variables/tree/master/packages/css-variables-language-server
+--
+-- CSS variables autocompletion and go-to-definition
+--
+-- `css-variables-language-server` can be installed via `npm`:
+--
+-- ```sh
+-- npm i -g css-variables-language-server
+-- ```
+return {
+  cmd = { 'css-variables-language-server', '--stdio' },
+  filetypes = { 'css', 'scss', 'less' },
+  root_markers = { 'package.json', '.git' },
+  -- Same as inlined defaults that don't seem to work without hardcoding them in the lua config
+  -- https://github.com/vunguyentuan/vscode-css-variables/blob/763a564df763f17aceb5f3d6070e0b444a2f47ff/packages/css-variables-language-server/src/CSSVariableManager.ts#L31-L50
+  settings = {
+    cssVariables = {
+      lookupFiles = { '**/*.less', '**/*.scss', '**/*.sass', '**/*.css' },
+      blacklistFolders = {
+        '**/.cache',
+        '**/.DS_Store',
+        '**/.git',
+        '**/.hg',
+        '**/.next',
+        '**/.svn',
+        '**/bower_components',
+        '**/CVS',
+        '**/dist',
+        '**/node_modules',
+        '**/tests',
+        '**/tmp',
+      },
+    },
+  },
+}