fix: do not start new LSP client when navigating to flutter dependency file

ftplugin/dart/init.lua

@@ -3,20 +3,12 @@ if vim.b.flutter_tools_did_ftplugin then return end
 vim.b.flutter_tools_did_ftplugin = 1
 
 require("flutter-tools.lsp").attach()
+local path = require("flutter-tools.utils.path")
 
 vim.opt_local.comments = [[sO:*\ -,mO:*\ \ ,exO:*/,s1:/*,mb:*,ex:*/,:///,://]]
 vim.opt_local.commentstring = [[//%s]]
 vim.opt.includeexpr = "v:lua.require('flutter-tools.resolve_url').resolve_url(v:fname)"
 
-local function is_nonmodifiable_path()
-  local path_parts = { [[.pub-cache]], [[Pub\Cache]], [[/fvm/versions/]] }
-  local full_path = vim.fn.expand("%:p")
-  if full_path then
-    for _, path_part in ipairs(path_parts) do
-      if full_path:find(path_part, nil, true) then return true end
-    end
-  end
-  return false
-end
+local full_path = vim.fn.expand("%:p")
 -- Prevent writes to files in the pub cache and FVM folder.
-if is_nonmodifiable_path() then vim.opt_local.modifiable = false end
+if path.is_flutter_dependency_path(full_path) then vim.opt_local.modifiable = false end

lua/flutter-tools/lsp/init.lua

@@ -170,12 +170,14 @@ end
 function M.get_project_root_dir()
   local conf = require("flutter-tools.config")
   local current_buffer_path = path.current_buffer_path()
-  local root_path = lsp_utils.is_valid_path(current_buffer_path)
-      and path.find_root(conf.root_patterns, current_buffer_path)
-    or nil
-
-  if root_path ~= nil then return root_path end
-
+  -- Check if path is flutter dependency. For dependencies we do not
+  -- search for a root directory as they are not projects.
+  if not path.is_flutter_dependency_path(current_buffer_path) then
+    local root_path = lsp_utils.is_valid_path(current_buffer_path)
+        and path.find_root(conf.root_patterns, current_buffer_path)
+      or nil
+    if root_path ~= nil then return root_path end
+  end
   local client = lsp_utils.get_dartls_client()
   return client and client.config.root_dir or nil
 end

lua/flutter-tools/utils/path.lua

@@ -139,4 +139,14 @@ function M.get_absolute_path(input_path)
   end
 end
 
+function M.is_flutter_dependency_path(full_path)
+  local path_parts = { [[.pub-cache]], [[Pub\Cache]], [[/fvm/versions/]] }
+  if full_path then
+    for _, path_part in ipairs(path_parts) do
+      if full_path:find(path_part, nil, true) then return true end
+    end
+  end
+  return false
+end
+
 return M