Fix CI failures: Add missing Elixir test repository source files

The lib/ directory was being ignored by the root .gitignore Python packaging rule.
This caused CI failures because test files like models.ex, services.ex, etc. were
missing from the repository.

- Add exception to .gitignore for test/resources/repos/elixir/test_repo/lib
- Add all missing Elixir source files:
  - examples.ex (example functions and data structures)
  - models.ex (User struct and related functions)
  - services.ex (UserService module)
  - test_repo.ex (main module)
  - utils.ex (utility functions)
  - ignored_dir/ignored_module.ex (for testing directory filtering)

These files are essential for Elixir language server tests to function properly.

.gitignore

@@ -224,3 +224,5 @@ tmp/
 
 # Elixir
 /test/resources/repos/elixir/test_repo/deps
+# Exception: Don't ignore Elixir test repository lib directory (contains source code)
+!/test/resources/repos/elixir/test_repo/lib

test/resources/repos/elixir/test_repo/lib/examples.ex

@@ -0,0 +1,211 @@
+defmodule TestRepo.Examples do
+  @moduledoc """
+  Examples module demonstrating usage of models and services.
+  Similar to Python's examples directory, this shows how different modules work together.
+  """
+
+  alias TestRepo.Models.{User, Item}
+  alias TestRepo.Services.{UserService, ItemService, OrderService}
+
+  defmodule UserManagement do
+    @doc """
+    Creates a complete user workflow example.
+    """
+    def run_user_example do
+      # Start user service
+      {:ok, user_service} = UserService.start_link()
+
+      # Create users
+      {:ok, alice} = UserService.create_user(user_service, "1", "Alice", "alice@example.com", ["admin"])
+      {:ok, bob} = UserService.create_user(user_service, "2", "Bob", "bob@example.com", ["user"])
+
+      # Get users
+      {:ok, retrieved_alice} = UserService.get_user(user_service, "1")
+
+      # List all users
+      all_users = UserService.list_users(user_service)
+
+      # Clean up
+      GenServer.stop(user_service)
+
+      %{
+        created_alice: alice,
+        created_bob: bob,
+        retrieved_alice: retrieved_alice,
+        all_users: all_users
+      }
+    end
+
+    @doc """
+    Demonstrates user role management.
+    """
+    def manage_user_roles do
+      user = User.new("role_user", "Role User", "role@example.com")
+
+      # Add roles
+      user_with_admin = User.add_role(user, "admin")
+      user_with_multiple = User.add_role(user_with_admin, "moderator")
+
+      # Check roles
+      has_admin = User.has_role?(user_with_multiple, "admin")
+      has_guest = User.has_role?(user_with_multiple, "guest")
+
+      %{
+        original_user: user,
+        user_with_roles: user_with_multiple,
+        has_admin: has_admin,
+        has_guest: has_guest
+      }
+    end
+  end
+
+  defmodule ShoppingExample do
+    @doc """
+    Creates a complete shopping workflow.
+    """
+    def run_shopping_example do
+      # Create user and items
+      user = User.new("customer1", "Customer One", "customer@example.com")
+      item1 = Item.new("widget1", "Super Widget", 19.99, "electronics")
+      item2 = Item.new("gadget1", "Cool Gadget", 29.99, "electronics")
+
+      # Create order
+      order = OrderService.create_order("order1", user)
+
+      # Add items to order
+      order_with_item1 = OrderService.add_item_to_order(order, item1)
+      order_with_items = OrderService.add_item_to_order(order_with_item1, item2)
+
+      # Process the order
+      processed_order = OrderService.process_order(order_with_items)
+      completed_order = OrderService.complete_order(processed_order)
+
+      %{
+        user: user,
+        items: [item1, item2],
+        final_order: completed_order,
+        total_cost: completed_order.total
+      }
+    end
+
+    @doc """
+    Demonstrates item filtering and searching.
+    """
+    def item_filtering_example do
+      # Start item service
+      {:ok, item_service} = ItemService.start_link()
+
+      # Create various items
+      ItemService.create_item(item_service, "laptop", "Gaming Laptop", 1299.99, "electronics")
+      ItemService.create_item(item_service, "book", "Elixir Guide", 39.99, "books")
+      ItemService.create_item(item_service, "phone", "Smartphone", 699.99, "electronics")
+      ItemService.create_item(item_service, "novel", "Great Novel", 19.99, "books")
+
+      # Get all items
+      all_items = ItemService.list_items(item_service)
+
+      # Filter by category
+      electronics = ItemService.list_items(item_service, "electronics")
+      books = ItemService.list_items(item_service, "books")
+
+      # Clean up
+      Agent.stop(item_service)
+
+      %{
+        all_items: all_items,
+        electronics: electronics,
+        books: books,
+        total_items: length(all_items),
+        electronics_count: length(electronics),
+        books_count: length(books)
+      }
+    end
+  end
+
+  defmodule IntegrationExample do
+    @doc """
+    Runs a complete e-commerce scenario.
+    """
+    def run_full_scenario do
+      # Setup services
+      container = TestRepo.Services.create_service_container()
+      TestRepo.Services.setup_sample_data(container)
+
+      # Get sample data
+      {:ok, sample_user} = UserService.get_user(container.user_service, TestRepo.Services.sample_user_id())
+      {:ok, sample_item} = ItemService.get_item(container.item_service, TestRepo.Services.sample_item_id())
+
+      # Create additional items
+      {:ok, premium_item} = ItemService.create_item(
+        container.item_service,
+        "premium",
+        "Premium Product",
+        99.99,
+        "premium"
+      )
+
+      # Create order with multiple items
+      order = OrderService.create_order("big_order", sample_user, [sample_item])
+      order_with_premium = OrderService.add_item_to_order(order, premium_item)
+
+      # Process through order lifecycle
+      processing_order = OrderService.process_order(order_with_premium)
+      final_order = OrderService.complete_order(processing_order)
+
+      # Serialize everything for output
+      serialized_user = TestRepo.Services.serialize_model(sample_user)
+      serialized_order = TestRepo.Services.serialize_model(final_order)
+
+      # Clean up
+      GenServer.stop(container.user_service)
+      Agent.stop(container.item_service)
+
+      %{
+        scenario: "full_ecommerce",
+        user: serialized_user,
+        order: serialized_order,
+        total_revenue: final_order.total,
+        items_sold: length(final_order.items)
+      }
+    end
+
+    @doc """
+    Demonstrates error handling scenarios.
+    """
+    def error_handling_example do
+      {:ok, user_service} = UserService.start_link()
+
+      # Try to create duplicate user
+      {:ok, _user1} = UserService.create_user(user_service, "dup", "User", "user@example.com")
+      duplicate_result = UserService.create_user(user_service, "dup", "Another User", "another@example.com")
+
+      # Try to get non-existent user
+      missing_user_result = UserService.get_user(user_service, "nonexistent")
+
+      # Try to delete non-existent user
+      delete_result = UserService.delete_user(user_service, "nonexistent")
+
+      GenServer.stop(user_service)
+
+      %{
+        duplicate_user_error: duplicate_result,
+        missing_user_error: missing_user_result,
+        delete_missing_error: delete_result
+      }
+    end
+  end
+
+  @doc """
+  Main function to run all examples.
+  """
+  def run_all_examples do
+    %{
+      user_management: UserManagement.run_user_example(),
+      role_management: UserManagement.manage_user_roles(),
+      shopping: ShoppingExample.run_shopping_example(),
+      item_filtering: ShoppingExample.item_filtering_example(),
+      integration: IntegrationExample.run_full_scenario(),
+      error_handling: IntegrationExample.error_handling_example()
+    }
+  end
+end 

test/resources/repos/elixir/test_repo/lib/ignored_dir/ignored_module.ex

@@ -0,0 +1,23 @@
+defmodule TestRepo.IgnoredDir.IgnoredModule do
+  @moduledoc """
+  This module is in a directory that should be ignored by the language server.
+  It's used for testing directory filtering functionality.
+  """
+
+  alias TestRepo.Models.User
+
+  @doc """
+  This function references the User model to test that ignored directories
+  don't show up in symbol references.
+  """
+  def create_ignored_user do
+    User.new("ignored", "Ignored User", "ignored@example.com")
+  end
+
+  @doc """
+  Another function that uses models.
+  """
+  def process_ignored_user(user) do
+    User.add_role(user, "ignored_role")
+  end
+end 

test/resources/repos/elixir/test_repo/lib/models.ex

@@ -0,0 +1,166 @@
+defmodule TestRepo.Models do
+  @moduledoc """
+  Models module demonstrating various Elixir patterns including structs, protocols, and behaviours.
+  """
+
+  defprotocol Serializable do
+    @doc "Convert model to map representation"
+    def to_map(model)
+  end
+
+  defmodule User do
+    @type t :: %__MODULE__{
+            id: String.t(),
+            name: String.t() | nil,
+            email: String.t(),
+            roles: list(String.t())
+          }
+
+    defstruct [:id, :name, :email, roles: []]
+
+    @doc """
+    Creates a new user.
+
+    ## Examples
+
+        iex> TestRepo.Models.User.new("1", "Alice", "alice@example.com")
+        %TestRepo.Models.User{id: "1", name: "Alice", email: "alice@example.com", roles: []}
+
+    """
+    def new(id, name, email, roles \\ []) do
+      %__MODULE__{id: id, name: name, email: email, roles: roles}
+    end
+
+    @doc """
+    Checks if user has a specific role.
+    """
+    def has_role?(%__MODULE__{roles: roles}, role) do
+      role in roles
+    end
+
+    @doc """
+    Adds a role to the user.
+    """
+    def add_role(%__MODULE__{roles: roles} = user, role) do
+      %{user | roles: [role | roles]}
+    end
+  end
+
+  defmodule Item do
+    @type t :: %__MODULE__{
+            id: String.t(),
+            name: String.t(),
+            price: float(),
+            category: String.t()
+          }
+
+    defstruct [:id, :name, :price, :category]
+
+    @doc """
+    Creates a new item.
+
+    ## Examples
+
+        iex> TestRepo.Models.Item.new("1", "Widget", 19.99, "electronics")
+        %TestRepo.Models.Item{id: "1", name: "Widget", price: 19.99, category: "electronics"}
+
+    """
+    def new(id, name, price, category) do
+      %__MODULE__{id: id, name: name, price: price, category: category}
+    end
+
+    @doc """
+    Formats price for display.
+    """
+    def display_price(%__MODULE__{price: price}) do
+      "$#{:erlang.float_to_binary(price, decimals: 2)}"
+    end
+
+    @doc """
+    Checks if item is in a specific category.
+    """
+    def in_category?(%__MODULE__{category: category}, target_category) do
+      category == target_category
+    end
+  end
+
+  defmodule Order do
+    alias TestRepo.Models.{User, Item}
+
+    @type t :: %__MODULE__{
+            id: String.t(),
+            user: User.t(),
+            items: list(Item.t()),
+            total: float(),
+            status: atom()
+          }
+
+    defstruct [:id, :user, items: [], total: 0.0, status: :pending]
+
+    @doc """
+    Creates a new order.
+    """
+    def new(id, user, items \\ []) do
+      total = calculate_total(items)
+      %__MODULE__{id: id, user: user, items: items, total: total}
+    end
+
+    @doc """
+    Adds an item to the order.
+    """
+    def add_item(%__MODULE__{items: items} = order, item) do
+      new_items = [item | items]
+      %{order | items: new_items, total: calculate_total(new_items)}
+    end
+
+    @doc """
+    Updates order status.
+    """
+    def update_status(%__MODULE__{} = order, status) do
+      %{order | status: status}
+    end
+
+    defp calculate_total(items) do
+      Enum.reduce(items, 0.0, fn item, acc -> acc + item.price end)
+    end
+  end
+
+  # Protocol implementations
+  defimpl Serializable, for: User do
+    def to_map(%User{id: id, name: name, email: email, roles: roles}) do
+      %{id: id, name: name, email: email, roles: roles}
+    end
+  end
+
+  defimpl Serializable, for: Item do
+    def to_map(%Item{id: id, name: name, price: price, category: category}) do
+      %{id: id, name: name, price: price, category: category}
+    end
+  end
+
+  defimpl Serializable, for: Order do
+    def to_map(%Order{id: id, user: user, items: items, total: total, status: status}) do
+      %{
+        id: id,
+        user: Serializable.to_map(user),
+        items: Enum.map(items, &Serializable.to_map/1),
+        total: total,
+        status: status
+      }
+    end
+  end
+
+  @doc """
+  Factory function to create a sample user.
+  """
+  def create_sample_user do
+    User.new("sample", "Sample User", "sample@example.com", ["user"])
+  end
+
+  @doc """
+  Factory function to create a sample item.
+  """
+  def create_sample_item do
+    Item.new("sample", "Sample Item", 9.99, "sample")
+  end
+end 

test/resources/repos/elixir/test_repo/lib/services.ex

@@ -0,0 +1,257 @@
+defmodule TestRepo.Services do
+  @moduledoc """
+  Services module demonstrating function usage and dependencies.
+  Similar to Python's services.py, this module uses the models defined in TestRepo.Models.
+  """
+
+  alias TestRepo.Models.{User, Item, Order, Serializable}
+
+  defmodule UserService do
+    use GenServer
+
+    # Client API
+
+    @doc """
+    Starts the UserService GenServer.
+    """
+    def start_link(opts \\ []) do
+      GenServer.start_link(__MODULE__, %{}, opts)
+    end
+
+    @doc """
+    Creates a new user and stores it.
+    """
+    def create_user(pid, id, name, email, roles \\ []) do
+      GenServer.call(pid, {:create_user, id, name, email, roles})
+    end
+
+    @doc """
+    Gets a user by ID.
+    """
+    def get_user(pid, id) do
+      GenServer.call(pid, {:get_user, id})
+    end
+
+    @doc """
+    Lists all users.
+    """
+    def list_users(pid) do
+      GenServer.call(pid, :list_users)
+    end
+
+    @doc """
+    Deletes a user by ID.
+    """
+    def delete_user(pid, id) do
+      GenServer.call(pid, {:delete_user, id})
+    end
+
+    # Server callbacks
+
+    @impl true
+    def init(_) do
+      {:ok, %{}}
+    end
+
+    @impl true
+    def handle_call({:create_user, id, name, email, roles}, _from, users) do
+      if Map.has_key?(users, id) do
+        {:reply, {:error, "User with ID #{id} already exists"}, users}
+      else
+        user = User.new(id, name, email, roles)
+        new_users = Map.put(users, id, user)
+        {:reply, {:ok, user}, new_users}
+      end
+    end
+
+    @impl true
+    def handle_call({:get_user, id}, _from, users) do
+      case Map.get(users, id) do
+        nil -> {:reply, {:error, :not_found}, users}
+        user -> {:reply, {:ok, user}, users}
+      end
+    end
+
+    @impl true
+    def handle_call(:list_users, _from, users) do
+      user_list = Map.values(users)
+      {:reply, user_list, users}
+    end
+
+    @impl true
+    def handle_call({:delete_user, id}, _from, users) do
+      if Map.has_key?(users, id) do
+        new_users = Map.delete(users, id)
+        {:reply, :ok, new_users}
+      else
+        {:reply, {:error, :not_found}, users}
+      end
+    end
+  end
+
+  defmodule ItemService do
+    use Agent
+
+    @doc """
+    Starts the ItemService Agent.
+    """
+    def start_link(opts \\ []) do
+      Agent.start_link(fn -> %{} end, opts)
+    end
+
+    @doc """
+    Creates a new item and stores it.
+    """
+    def create_item(pid, id, name, price, category) do
+      Agent.get_and_update(pid, fn items ->
+        if Map.has_key?(items, id) do
+          {{:error, "Item with ID #{id} already exists"}, items}
+        else
+          item = Item.new(id, name, price, category)
+          new_items = Map.put(items, id, item)
+          {{:ok, item}, new_items}
+        end
+      end)
+    end
+
+    @doc """
+    Gets an item by ID.
+    """
+    def get_item(pid, id) do
+      Agent.get(pid, fn items ->
+        case Map.get(items, id) do
+          nil -> {:error, :not_found}
+          item -> {:ok, item}
+        end
+      end)
+    end
+
+    @doc """
+    Lists all items, optionally filtered by category.
+    """
+    def list_items(pid, category \\ nil) do
+      Agent.get(pid, fn items ->
+        item_list = Map.values(items)
+
+        case category do
+          nil -> item_list
+          cat -> Enum.filter(item_list, &Item.in_category?(&1, cat))
+        end
+      end)
+    end
+
+    @doc """
+    Deletes an item by ID.
+    """
+    def delete_item(pid, id) do
+      Agent.get_and_update(pid, fn items ->
+        if Map.has_key?(items, id) do
+          new_items = Map.delete(items, id)
+          {:ok, new_items}
+        else
+          {{:error, :not_found}, items}
+        end
+      end)
+    end
+  end
+
+  defmodule OrderService do
+    @doc """
+    Creates a new order.
+    """
+    def create_order(id, user, items \\ []) do
+      Order.new(id, user, items)
+    end
+
+    @doc """
+    Adds an item to an existing order.
+    """
+    def add_item_to_order(order, item) do
+      Order.add_item(order, item)
+    end
+
+    @doc """
+    Updates the status of an order.
+    """
+    def update_order_status(order, status) do
+      Order.update_status(order, status)
+    end
+
+    @doc """
+    Processes an order (changes status to :processing).
+    """
+    def process_order(order) do
+      update_order_status(order, :processing)
+    end
+
+    @doc """
+    Completes an order (changes status to :completed).
+    """
+    def complete_order(order) do
+      update_order_status(order, :completed)
+    end
+
+    @doc """
+    Cancels an order (changes status to :cancelled).
+    """
+    def cancel_order(order) do
+      update_order_status(order, :cancelled)
+    end
+  end
+
+  @doc """
+  Factory function to create a service container.
+  """
+  def create_service_container do
+    {:ok, user_service} = UserService.start_link()
+    {:ok, item_service} = ItemService.start_link()
+
+    %{
+      user_service: user_service,
+      item_service: item_service,
+      order_service: OrderService
+    }
+  end
+
+  @doc """
+  Helper function to serialize any model that implements the Serializable protocol.
+  """
+  def serialize_model(model) do
+    Serializable.to_map(model)
+  end
+
+  # Module-level variables for testing
+  @sample_user_id "sample_user"
+  @sample_item_id "sample_item"
+
+  @doc """
+  Gets the sample user ID.
+  """
+  def sample_user_id, do: @sample_user_id
+
+  @doc """
+  Gets the sample item ID.
+  """
+  def sample_item_id, do: @sample_item_id
+
+  # Create some sample data at module load time
+  def setup_sample_data(container) do
+    # Create sample user
+    UserService.create_user(
+      container.user_service,
+      @sample_user_id,
+      "Sample User",
+      "sample@example.com",
+      ["user", "customer"]
+    )
+
+    # Create sample item
+    ItemService.create_item(
+      container.item_service,
+      @sample_item_id,
+      "Sample Widget",
+      29.99,
+      "electronics"
+    )
+  end
+end 

test/resources/repos/elixir/test_repo/lib/test_repo.ex

@@ -0,0 +1,31 @@
+defmodule TestRepo do
+  @moduledoc """
+  Documentation for `TestRepo`.
+  """
+
+  @doc """
+  Hello world.
+
+  ## Examples
+
+      iex> TestRepo.hello()
+      :world
+
+  """
+  def hello do
+    :world
+  end
+
+  @doc """
+  Adds two numbers together.
+
+  ## Examples
+
+      iex> TestRepo.add(2, 3)
+      5
+
+  """
+  def add(a, b) do
+    a + b
+  end
+end 

test/resources/repos/elixir/test_repo/lib/utils.ex

@@ -0,0 +1,48 @@
+defmodule TestRepo.Utils do
+  @moduledoc """
+  Utility functions for TestRepo.
+  """
+
+  @doc """
+  Converts a string to uppercase.
+
+  ## Examples
+
+      iex> TestRepo.Utils.upcase("hello")
+      "HELLO"
+
+  """
+  def upcase(string) when is_binary(string) do
+    String.upcase(string)
+  end
+
+  @doc """
+  Calculates the factorial of a number.
+
+  ## Examples
+
+      iex> TestRepo.Utils.factorial(5)
+      120
+
+  """
+  def factorial(0), do: 1
+  def factorial(n) when n > 0 do
+    n * factorial(n - 1)
+  end
+
+  @doc """
+  Checks if a number is even.
+
+  ## Examples
+
+      iex> TestRepo.Utils.even?(4)
+      true
+
+      iex> TestRepo.Utils.even?(3)
+      false
+
+  """
+  def even?(n) when is_integer(n) do
+    rem(n, 2) == 0
+  end
+end