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, 87 insertions, 0 deletions

diff --git a/lsp/ltex_plus.lua b/lsp/ltex_plus.lua
new file mode 100644
index 00000000..b3c40a6e
--- /dev/null
+++ b/lsp/ltex_plus.lua
@@ -0,0 +1,87 @@
+local language_id_mapping = {
+  bib = 'bibtex',
+  pandoc = 'markdown',
+  plaintex = 'tex',
+  rnoweb = 'rsweave',
+  rst = 'restructuredtext',
+  tex = 'latex',
+  text = 'plaintext',
+}
+
+local function get_language_id(_, filetype)
+  return language_id_mapping[filetype] or filetype
+end
+
+---@brief
+---
+---https://github.com/ltex-plus/ltex-ls-plus
+--
+-- LTeX Language Server: LSP language server for LanguageTool 🔍✔️ with support for LaTeX 🎓, Markdown 📝, and others
+--
+-- To install, download the latest [release](https://github.com/ltex-plus/ltex-ls-plus) and ensure `ltex-ls-plus` is on your path.
+--
+-- This server accepts configuration via the `settings` key.
+--
+-- ```lua
+--   settings = {
+--     ltex = {
+--       language = "en-GB",
+--     },
+--   },
+-- ```
+--
+-- To support org files or R sweave, users can define a custom filetype autocommand (or use a plugin which defines these filetypes):
+--
+-- ```lua
+-- vim.cmd [[ autocmd BufRead,BufNewFile *.org set filetype=org ]]
+-- ```
+return {
+  cmd = { 'ltex-ls-plus' },
+  filetypes = {
+    'bib',
+    'context',
+    'gitcommit',
+    'html',
+    'markdown',
+    'org',
+    'pandoc',
+    'plaintex',
+    'quarto',
+    'mail',
+    'mdx',
+    'rmd',
+    'rnoweb',
+    'rst',
+    'tex',
+    'text',
+    'typst',
+    'xhtml',
+  },
+  root_markers = { '.git' },
+  get_language_id = get_language_id,
+  settings = {
+    ltex = {
+      enabled = {
+        'bib',
+        'context',
+        'gitcommit',
+        'html',
+        'markdown',
+        'org',
+        'pandoc',
+        'plaintex',
+        'quarto',
+        'mail',
+        'mdx',
+        'rmd',
+        'rnoweb',
+        'rst',
+        'tex',
+        'latex',
+        'text',
+        'typst',
+        'xhtml',
+      },
+    },
+  },
+}