feat(core,langs): Improved error messaging with null-ls package install failures.

lua/doom/modules/langs/utils.lua

@@ -60,6 +60,7 @@ module.use_null_ls = function(package_name, null_ls_path, configure_function)
       local path = vim.split(null_ls_path, "%.", nil)
       if #path ~= 3 then
         log.error(("Error setting up null-ls provider `%s`.\n\n  null_ls_path should have 3 segments i.e. `builtins.formatting.stylua"):format(null_ls_path))
+        return
       end
       local provider = null_ls[path[1]][path[2]][path[3]]
 
@@ -70,9 +71,13 @@ module.use_null_ls = function(package_name, null_ls_path, configure_function)
       module.use_null_ls_source({ provider })
     end
 
+    local on_error = function(package_name, message)
+      log.error(("There was an error setting up null_ls provider `%s`. Reason: \n%s"):format(null_ls_path, message))
+    end
+
     -- If auto_install module is enabled, try to install package before starting
     if doom.features.auto_install and package_name ~= nil then
-      module.use_mason_package(package_name, start_null_ls)
+      module.use_mason_package(package_name, start_null_ls, on_error)
     else
       vim.defer_fn(function()
         start_null_ls()
@@ -85,7 +90,7 @@ end
 ---@param package_name string Name of the package that's being installed
 ---@param err_message string Reason for erroring out of installing mason package
 local default_error_handler = function(package_name, err_message)
-  error(("Error installing mason package `%s`.  Reason: %s "):format(package_name, err_message))
+  error(("Error installing mason package `%s`.  Reason: \n%s "):format(package_name, err_message))
 end
 
 --- Installs a mason package and provides an on-ready handler
@@ -124,10 +129,10 @@ module.use_mason_package = function(package_name, success_handler, error_handler
         if statusline then
           statusline.state.finish_mason_package(package_name)
         end
-        local err = "Mason.nvim failed safely.  You might be missing the dependencies to install this package."
+        local err = "Mason.nvim install failed.  Reason:\n"
         if (pkg and pkg.stdio and pkg.stdio.buffers and pkg.stdio.buffers.stderr) then
-          err = err .. "\n \n"
           for _, line in ipairs(pkg.stdio.buffers.stderr) do
+            print(line)
             err = err .. line
           end
         end
@@ -141,7 +146,7 @@ module.use_mason_package = function(package_name, success_handler, error_handler
     end
   end, debug.traceback)
   if not ok then
-    on_err(package_name, "There was an unknown error when trying to install. \n\n" .. err)
+    on_err(package_name, "There was an unknown error when installing.  Reason: \n" .. err)
   end
 end