healthcheck: skip healthcheck if make_config function is nil

resolve https://github.com/neovim/nvim-lsp/issues/248

1 files changed, 13 insertions, 15 deletions

diff --git a/lua/nvim_lsp/health.lua b/lua/nvim_lsp/health.lua
index f319a265..d0e5820e 100644
--- a/lua/nvim_lsp/health.lua
+++ b/lua/nvim_lsp/health.lua
@@ -3,23 +3,21 @@ function M.check_health()
   local configs = require 'nvim_lsp/configs'
 
   for _, top_level_config in pairs(configs) do
-    -- the folder needs to exist
-    local config = top_level_config.make_config(".")
+    -- If users execute `:LspInstall` or `:LspInstallInfo`,
+    -- a config is required but is not added make_config function.
+    if not (top_level_config.make_config == nil) then
+      -- the folder needs to exist
+      local config = top_level_config.make_config(".")
 
-    local status, cmd = pcall(vim.lsp._cmd_parts, config.cmd)
-    if not status then
-      vim.fn['health#report_error'](
-        string.format("%s: config.cmd error, %s", config.name, cmd)
-      )
-    else
-      if not (vim.fn.executable(cmd) == 1) then
-        vim.fn['health#report_error'](
-          string.format("%s: The given command %q is not executable.", config.name, cmd)
-        )
+      local status, cmd = pcall(vim.lsp._cmd_parts, config.cmd)
+      if not status then
+        vim.fn['health#report_error'](string.format("%s: config.cmd error, %s", config.name, cmd))
       else
-        vim.fn['health#report_info'](
-          string.format("%s: configuration checked.", config.name)
-        )
+        if not (vim.fn.executable(cmd) == 1) then
+          vim.fn['health#report_error'](string.format("%s: The given command %q is not executable.", config.name, cmd))
+        else
+          vim.fn['health#report_info'](string.format("%s: configuration checked.", config.name))
+        end
       end
     end
   end