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, 28 insertions, 0 deletions

diff --git a/lsp/fsharp_language_server.lua b/lsp/fsharp_language_server.lua
new file mode 100644
index 00000000..15afebf9
--- /dev/null
+++ b/lsp/fsharp_language_server.lua
@@ -0,0 +1,28 @@
+local util = require 'lspconfig.util'
+
+---@brief
+---
+---F# Language Server
+-- https://github.com/faldor20/fsharp-language-server
+--
+-- An implementation of the language server protocol using the F# Compiler Service.
+--
+-- Build the project from source and override the command path to location of DLL.
+--
+-- If filetype determination is not already performed by an available plugin ([PhilT/vim-fsharp](https://github.com/PhilT/vim-fsharp), [fsharp/vim-fsharp](https://github.com/fsharp/vim-fsharp), and [adelarsq/neofsharp.vim](https://github.com/adelarsq/neofsharp.vim).
+-- ), then the following must be added to initialization configuration:
+--
+--
+-- `autocmd BufNewFile,BufRead *.fs,*.fsx,*.fsi set filetype=fsharp`
+return {
+  cmd = { 'dotnet', 'FSharpLanguageServer.dll' },
+  root_dir = function(bufnr, on_dir)
+    local fname = vim.api.nvim_buf_get_name(bufnr)
+    on_dir(util.root_pattern('*.sln', '*.fsproj', '.git')(fname))
+  end,
+  filetypes = { 'fsharp' },
+  init_options = {
+    AutomaticWorkspaceInit = true,
+  },
+  settings = {},
+}