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, 38 insertions, 0 deletions

diff --git a/lsp/unocss.lua b/lsp/unocss.lua
new file mode 100644
index 00000000..192967de
--- /dev/null
+++ b/lsp/unocss.lua
@@ -0,0 +1,38 @@
+---@brief
+---
+---https://github.com/xna00/unocss-language-server
+--
+-- UnoCSS Language Server can be installed via npm:
+-- ```sh
+-- npm i unocss-language-server -g
+-- ```
+return {
+  cmd = { 'unocss-language-server', '--stdio' },
+  -- copied from https://github.com/unocss/unocss/blob/35297359bf61917bda499db86e3728a7ebd05d6c/packages/vscode/src/autocomplete.ts#L12-L35
+  filetypes = {
+    'erb',
+    'haml',
+    'hbs',
+    'html',
+    'css',
+    'postcss',
+    'javascript',
+    'javascriptreact',
+    'markdown',
+    'ejs',
+    'php',
+    'svelte',
+    'typescript',
+    'typescriptreact',
+    'vue-html',
+    'vue',
+    'sass',
+    'scss',
+    'less',
+    'stylus',
+    'astro',
+    'rescript',
+    'rust',
+  },
+  root_markers = { 'unocss.config.js', 'unocss.config.ts', 'uno.config.js', 'uno.config.ts' },
+}