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, 39 insertions, 0 deletions

diff --git a/lsp/pylsp.lua b/lsp/pylsp.lua
new file mode 100644
index 00000000..4c88fa0d
--- /dev/null
+++ b/lsp/pylsp.lua
@@ -0,0 +1,39 @@
+---@brief
+---
+---https://github.com/python-lsp/python-lsp-server
+--
+-- A Python 3.6+ implementation of the Language Server Protocol.
+--
+-- See the [project's README](https://github.com/python-lsp/python-lsp-server) for installation instructions.
+--
+-- Configuration options are documented [here](https://github.com/python-lsp/python-lsp-server/blob/develop/CONFIGURATION.md).
+-- In order to configure an option, it must be translated to a nested Lua table and included in the `settings` argument to the `config('pylsp', {})` function.
+-- For example, in order to set the `pylsp.plugins.pycodestyle.ignore` option:
+-- ```lua
+-- vim.lsp.config('pylsp', {
+--   settings = {
+--     pylsp = {
+--       plugins = {
+--         pycodestyle = {
+--           ignore = {'W391'},
+--           maxLineLength = 100
+--         }
+--       }
+--     }
+--   }
+-- })
+-- ```
+--
+-- Note: This is a community fork of `pyls`.
+return {
+  cmd = { 'pylsp' },
+  filetypes = { 'python' },
+  root_markers = {
+    'pyproject.toml',
+    'setup.py',
+    'setup.cfg',
+    'requirements.txt',
+    'Pipfile',
+    '.git',
+  },
+}