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, 45 insertions, 0 deletions

diff --git a/lsp/bacon_ls.lua b/lsp/bacon_ls.lua
new file mode 100644
index 00000000..caa1867d
--- /dev/null
+++ b/lsp/bacon_ls.lua
@@ -0,0 +1,45 @@
+---@brief
+---
+---https://github.com/crisidev/bacon-ls
+--
+-- A Language Server Protocol wrapper for [bacon](https://dystroy.org/bacon/).
+-- It offers textDocument/diagnostic and workspace/diagnostic capabilities for Rust
+-- workspaces using the Bacon export locations file.
+--
+-- It requires `bacon` and `bacon-ls` to be installed on the system using
+-- [mason.nvim](https://github.com/williamboman/mason.nvim) or manually
+--
+-- ```sh
+-- $ cargo install --locked bacon bacon-ls
+-- ```
+--
+-- Settings can be changed using the `init_options` dictionary:util
+--
+-- ```lua
+-- init_options = {
+--     -- Bacon export filename (default: .bacon-locations).
+--     locationsFile = ".bacon-locations",
+--     -- Try to update diagnostics every time the file is saved (default: true).
+--     updateOnSave = true,
+--     --  How many milliseconds to wait before updating diagnostics after a save (default: 1000).
+--     updateOnSaveWaitMillis = 1000,
+--     -- Try to update diagnostics every time the file changes (default: true).
+--     updateOnChange = true,
+--     -- Try to validate that bacon preferences are setup correctly to work with bacon-ls (default: true).
+--     validateBaconPreferences = true,
+--     -- f no bacon preferences file is found, create a new preferences file with the bacon-ls job definition (default: true).
+--     createBaconPreferencesFile = true,
+--     -- Run bacon in background for the bacon-ls job (default: true)
+--     runBaconInBackground = true,
+--     -- Command line arguments to pass to bacon running in background (default "--headless -j bacon-ls")
+--     runBaconInBackgroundCommandArguments = "--headless -j bacon-ls",
+--     -- How many milliseconds to wait between background diagnostics check to synchronize all open files (default: 2000).
+--     synchronizeAllOpenFilesWaitMillis = 2000,
+-- }
+-- ```
+return {
+  cmd = { 'bacon-ls' },
+  filetypes = { 'rust' },
+  root_markers = { '.bacon-locations', 'Cargo.toml' },
+  init_options = {},
+}