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fix(lsp): check filetype registry in health (#38885)

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fix(health): misleading warnings re filetypes registered w/ vim.filetype.add() #38867

Problem:
`:checkhealth vim.lsp` validates configured filetypes against
`getcompletion('', 'filetype')`. This only reflects runtime support
files.

This causes false warnings in `:checkhealth vim.lsp` for configured
filetypes that are known to the Lua filetype registry, including
values added with `vim.filetype.add()` and built-in registry-only
filetypes.

Solution:
Build the healthcheck's known-filetype set from both
`getcompletion('', 'filetype')` and `vim.filetype.inspect()`.

(cherry picked from commit 20a3254ad4)

Co-authored-by: Barrett Ruth <62671086+barrettruth@users.noreply.github.com>
This commit is contained in:
neovim-backports[bot]
2026-04-08 17:24:15 -04:00
committed by GitHub
parent c76bbd0a54
commit df726644b8
2 changed files with 63 additions and 2 deletions
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32
runtime/lua/vim/lsp/health.lua
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@@ -212,10 +212,38 @@ local function check_position_encodings()
end
end
local function get_known_filetypes()
local known = vim.fn.getcompletion('', 'filetype')
local registry = vim.filetype.inspect()
local function add_filetype(value)
local filetype = type(value) == 'table' and value[1] or value
if type(filetype) == 'string' and not vim.list_contains(known, filetype) then
known[#known + 1] = filetype
end
end
for _, value in pairs(registry.extension) do
add_filetype(value)
end
for _, value in pairs(registry.filename) do
add_filetype(value)
end
for _, mappings in pairs(registry.pattern) do
for _, value in pairs(mappings) do
add_filetype(value)
end
end
return known
end
local function check_enabled_configs()
vim.health.start('vim.lsp: Enabled Configurations')
local valid_filetypes = vim.fn.getcompletion('', 'filetype')
local known_filetypes = get_known_filetypes()
for name in vim.spairs(vim.lsp._enabled_configs) do
local config = vim.lsp.config[name]
@@ -248,7 +276,7 @@ local function check_enabled_configs()
for _, filetype in
ipairs(v --[[@as string[] ]])
do
if not vim.list_contains(valid_filetypes, filetype) then
if not vim.list_contains(known_filetypes, filetype) then
report_warn(
("Unknown filetype '%s' (Hint: filename extension != filetype)."):format(filetype)
)