neovim

commit 5554fcc28683e5d182198158b293851a96f0d6a0
parent 95ab723995f1cc1a11c62355fbac64597526d47e
Author: Micah Halter <micah.halter@gtri.gatech.edu>
Date:   Fri, 28 Mar 2025 08:46:10 -0400

fix(lsp): warn on missing config in :checkhealth #33087

Problem
When calling `:checkhealth vim.lsp` after the user has enabled a language
server with `vim.lsp.enable` that has no configuration a runtime error
is hit because the code expects for a configuration to exist.

Solution:
Check if a configuration was returned before parsing it, if it isn't
returned then warn the user that the server has been enabled but a
configuration was not found.
Diffstat:
M
runtime/lua/vim/lsp/health.lua
 | 
42
++++++++++++++++++++++++------------------

1 file changed, 24 insertions(+), 18 deletions(-)
diff --git a/runtime/lua/vim/lsp/health.lua b/runtime/lua/vim/lsp/health.lua
@@ -187,26 +187,32 @@ local function check_enabled_configs()
     local config = vim.lsp.config[name]
     local text = {} --- @type string[]
     text[#text + 1] = ('%s:'):format(name)
-    for k, v in
-      vim.spairs(config --[[@as table<string,any>]])
-    do
-      local v_str --- @type string?
-      if k == 'name' then
-        v_str = nil
-      elseif k == 'filetypes' or k == 'root_markers' then
-        v_str = table.concat(v, ', ')
-      elseif type(v) == 'function' then
-        v_str = func_tostring(v)
-      else
-        v_str = vim.inspect(v, { newline = '\n  ' })
-      end
+    if not config then
+      report_warn(
+        ("'%s' config not found. Ensure that vim.lsp.config('%s') was called."):format(name, name)
+      )
+    else
+      for k, v in
+        vim.spairs(config --[[@as table<string,any>]])
+      do
+        local v_str --- @type string?
+        if k == 'name' then
+          v_str = nil
+        elseif k == 'filetypes' or k == 'root_markers' then
+          v_str = table.concat(v, ', ')
+        elseif type(v) == 'function' then
+          v_str = func_tostring(v)
+        else
+          v_str = vim.inspect(v, { newline = '\n  ' })
+        end
 
-      if k == 'cmd' and type(v) == 'table' and vim.fn.executable(v[1]) == 0 then
-        report_warn(("'%s' is not executable. Configuration will not be used."):format(v[1]))
-      end
+        if k == 'cmd' and type(v) == 'table' and vim.fn.executable(v[1]) == 0 then
+          report_warn(("'%s' is not executable. Configuration will not be used."):format(v[1]))
+        end
 
-      if v_str then
-        text[#text + 1] = ('- %s: %s'):format(k, v_str)
+        if v_str then
+          text[#text + 1] = ('- %s: %s'):format(k, v_str)
+        end
       end
     end
     text[#text + 1] = ''