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, 32 insertions, 0 deletions

diff --git a/lsp/phan.lua b/lsp/phan.lua
new file mode 100644
index 00000000..785da183
--- /dev/null
+++ b/lsp/phan.lua
@@ -0,0 +1,32 @@
+local util = require 'lspconfig.util'
+
+local cmd = {
+  'phan',
+  '-m',
+  'json',
+  '--no-color',
+  '--no-progress-bar',
+  '-x',
+  '-u',
+  '-S',
+  '--language-server-on-stdin',
+  '--allow-polyfill-parser',
+}
+
+---@brief
+---
+---https://github.com/phan/phan
+--
+-- Installation: https://github.com/phan/phan#getting-started
+return {
+  cmd = cmd,
+  filetypes = { 'php' },
+  root_dir = function(bufnr, on_dir)
+    local fname = vim.api.nvim_buf_get_name(bufnr)
+    local cwd = vim.uv.cwd()
+    local root = util.root_pattern('composer.json', '.git')(fname)
+
+    -- prefer cwd if root is a descendant
+    on_dir(util.path.is_descendant(cwd, root) and cwd or root)
+  end,
+}