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, 23 insertions, 0 deletions

diff --git a/lsp/muon.lua b/lsp/muon.lua
new file mode 100644
index 00000000..6a7718b9
--- /dev/null
+++ b/lsp/muon.lua
@@ -0,0 +1,23 @@
+---@brief
+---
+---https://muon.build
+return {
+  cmd = { 'muon', 'analyze', 'lsp' },
+  filetypes = { 'meson' },
+  root_dir = function(bufnr, on_dir)
+    local fname = vim.api.nvim_buf_get_name(bufnr)
+    local cmd = { 'muon', 'analyze', 'root-for', fname }
+    vim.system(cmd, { text = true }, function(output)
+      if output.code == 0 then
+        if output.stdout then
+          on_dir(vim.trim(output.stdout))
+          return
+        end
+
+        on_dir(nil)
+      else
+        vim.notify(('[muon] cmd failed with code %d: %s\n%s'):format(output.code, cmd, output.stderr))
+      end
+    end)
+  end,
+}