Ensure more deprecated functionality is removed from coverage

Author: josevalim

Makefile

@@ -26,7 +26,7 @@ GIT_TAG = $(strip $(shell head="$(call GIT_REVISION)"; git tag --points-at $$hea
 SOURCE_DATE_EPOCH_PATH = lib/elixir/tmp/ebin_reproducible
 SOURCE_DATE_EPOCH_FILE = $(SOURCE_DATE_EPOCH_PATH)/SOURCE_DATE_EPOCH
 
-.PHONY: install install_man build_plt clean_plt dialyze test check_reproducible clean clean_elixir clean_man format docs Docs.zip Precompiled.zip zips
+.PHONY: cover install install_man build_plt clean_plt dialyze test check_reproducible clean clean_elixir clean_man format docs Docs.zip Precompiled.zip zips
 .NOTPARALLEL:
 
 #==> Functions
@@ -299,7 +299,6 @@ cover/combined.coverdata: cover/ex_unit_elixir.coverdata
 cover/combined.coverdata:
 	bin/elixir ./lib/elixir/scripts/cover.exs
 
-.PHONY: cover
 cover: cover/combined.coverdata
 
 #==> Dialyzer tasks

lib/elixir/lib/gen_event/stream.ex

@@ -4,6 +4,7 @@
 
 defmodule GenEvent.Stream do
   @moduledoc false
+  @moduledoc deprecated: "This functinoality is no longer supported"
   defstruct manager: nil, timeout: :infinity
 
   @type t :: %__MODULE__{manager: GenEvent.manager(), timeout: timeout}
@@ -50,6 +51,9 @@ defmodule GenEvent.Stream do
 end
 
 defimpl Enumerable, for: GenEvent.Stream do
+  @moduledoc false
+  @moduledoc deprecated: "This functinoality is no longer supported"
+
   def reduce(stream, acc, fun) do
     start_fun = fn -> start(stream) end
     next_fun = &next(stream, &1)

lib/elixir/lib/hash_dict.ex

@@ -260,6 +260,9 @@ defmodule HashDict do
 end
 
 defimpl Enumerable, for: HashDict do
+  @moduledoc false
+  @moduledoc deprecated: "Use Map instead"
+
   def reduce(dict, acc, fun) do
     # Avoid warnings about HashDict being deprecated.
     module = String.to_atom("HashDict")
@@ -288,6 +291,9 @@ defimpl Enumerable, for: HashDict do
 end
 
 defimpl Collectable, for: HashDict do
+  @moduledoc false
+  @moduledoc deprecated: "Use Map instead"
+
   def into(original) do
     # Avoid warnings about HashDict being deprecated.
     module = String.to_atom("HashDict")
@@ -303,6 +309,8 @@ defimpl Collectable, for: HashDict do
 end
 
 defimpl Inspect, for: HashDict do
+  @moduledoc false
+  @moduledoc deprecated: "Use Map instead"
   import Inspect.Algebra
 
   def inspect(dict, opts) do

lib/elixir/lib/hash_set.ex

@@ -274,6 +274,9 @@ defmodule HashSet do
 end
 
 defimpl Enumerable, for: HashSet do
+  @moduledoc false
+  @moduledoc deprecated: "Use MapSet instead"
+
   def reduce(set, acc, fun) do
     # Avoid warnings about HashSet being deprecated.
     module = String.to_atom("HashSet")
@@ -298,6 +301,9 @@ defimpl Enumerable, for: HashSet do
 end
 
 defimpl Collectable, for: HashSet do
+  @moduledoc false
+  @moduledoc deprecated: "Use MapSet instead"
+
   def into(original) do
     # Avoid warnings about HashSet being deprecated.
     module = String.to_atom("HashSet")
@@ -313,6 +319,8 @@ defimpl Collectable, for: HashSet do
 end
 
 defimpl Inspect, for: HashSet do
+  @moduledoc false
+  @moduledoc deprecated: "Use MapSet instead"
   import Inspect.Algebra
 
   def inspect(set, opts) do

lib/elixir/lib/kernel/parallel_require.ex

@@ -4,6 +4,7 @@
 
 defmodule Kernel.ParallelRequire do
   @moduledoc false
+  @moduledoc deprecated: "Use the Kernel.ParallelCompiler module instead"
 
   @deprecated "Use Kernel.ParallelCompiler.require/2 instead"
   def files(files, callbacks \\ [])

lib/elixir/scripts/cover_record.exs

@@ -66,12 +66,16 @@ defmodule CoverageRecorder do
     |> Enum.flat_map(fn ebin ->
       ebin |> Path.join("*.beam") |> Path.wildcard()
     end)
-    |> Enum.reject(&deprecated/1)
+    |> Enum.reject(&skip_from_coverage?/1)
   end
 
-  defp deprecated(file) do
-    mod = file |> Path.basename(".beam") |> String.to_atom()
+  @to_skip [
+    # Documentation only
+    Kernel.SpecialForms
+  ]
 
-    match?({:docs_v1, _, _, _, _, %{deprecated: _}, _}, Code.fetch_docs(mod))
+  defp skip_from_coverage?(file) do
+    mod = file |> Path.basename(".beam") |> String.to_atom()
+    mod in @to_skip or match?({:docs_v1, _, _, _, _, %{deprecated: _}, _}, Code.fetch_docs(mod))
   end
 end

lib/mix/lib/mix/config.ex

@@ -4,6 +4,7 @@
 
 defmodule Mix.Config do
   @moduledoc false
+  @moduledoc deprecated: "Use the Config module instead"
 
   @deprecated "Use the Config module instead"
   defmacro __using__(_) do