Merge pull request #421 from baseballlover723/master

Added a configuration option to specify the path of the project plt file

README.md

@@ -128,7 +128,7 @@ Running the mix task `dialyzer` by default builds several PLT files:
   * A project environment specific file in _build/env/dialyze_erlang-[OTP Version]_elixir-[Elixir Version]_deps-dev.plt
 
 The core files are simply copied to your project folder when you run `dialyxir` for the first time with a given version of Erlang and Elixir. By default, all
-the modules in the project PLT are checked against your dependencies to be sure they are up to date. If you do not want to use MIX_HOME to store your core Erlang and Elixir files, you can provide a :plt_core_path key with a file path. You can specify a different location for the project PLT file with the :plt_file keyword - this is deprecated because people were using it with the old `dialyxir` to have project-specific PLTs, which are now the default. To silence the deprecation warning, specify this value as `plt_file: {:no_warn, "/myproject/mypltfile"}`.
+the modules in the project PLT are checked against your dependencies to be sure they are up to date. If you do not want to use MIX_HOME to store your core Erlang and Elixir files, you can provide a :plt_core_path key with a file path. You can specify a different directory for the project PLT file with the :plt_local_path keyword. You can specify a different filename for the project PLT file with the :plt_file keyword - this is deprecated because people were using it with the old `dialyxir` to have project-specific PLTs, which are now the default. To silence the deprecation warning, specify this value as `plt_file: {:no_warn, "/myproject/mypltfile"}`.
 
 The core PLTs include a basic set of OTP applications, as well as all of the Elixir standard libraries.
 The apps included by default are `[ :erts, :kernel, :stdlib, :crypto]`.

lib/dialyxir/project.ex

@@ -258,9 +258,11 @@ defmodule Dialyxir.Project do
   defp core_path(), do: dialyzer_config()[:plt_core_path] || Mix.Utils.mix_home()
 
   defp local_plt(name) do
-    Path.join(Mix.Project.build_path(), "dialyxir_" <> name <> ".plt")
+    Path.join(local_path(), "dialyxir_" <> name <> ".plt")
   end
 
+  defp local_path(), do: dialyzer_config()[:plt_local_path] || Mix.Project.build_path()
+
   defp default_paths() do
     reduce_umbrella_children([], fn paths ->
       [Mix.Project.compile_path() | paths]

lib/mix/tasks/dialyzer.ex

@@ -83,6 +83,8 @@ defmodule Mix.Tasks.Dialyzer do
 
   * `dialyzer: :plt_file` - Deprecated - specify the plt file name to create and use - default is to create one in the project's current build environmnet (e.g. _build/dev/) specific to the Erlang/Elixir version used. Note that use of this key in version 0.4 or later will produce a deprecation warning - you can silence the warning by providing a pair with key :no_warn e.g. `plt_file: {:no_warn,"filename"}`.
 
+  * `dialyzer: :plt_local_path` - specify the plt directory name to create and use - default is the project's current build environmnet (e.g. _build/dev/).
+
   * `dialyzer: :plt_core_path` - specify an alternative to MIX_HOME to use to store the Erlang and Elixir core files.
 
   * `dialyzer: :ignore_warnings` - specify file path to filter well-known warnings.

test/dialyxir/project_test.exs

@@ -16,7 +16,13 @@ defmodule Dialyxir.ProjectTest do
 
   test "Default Project PLT File in _build dir" do
     in_project(:default_apps, fn ->
-      assert Regex.match?(~r/_build.*plt/, Project.plt_file())
+      assert Regex.match?(~r/_build\/.*plt/, Project.plt_file())
+    end)
+  end
+
+  test "Can specify a different local PLT path" do
+    in_project(:alt_local_path, fn ->
+      assert Regex.match?(~r/dialyzer\/.*plt/, Project.plt_file())
     end)
   end
 

test/fixtures/alt_local_path/mix.exs

@@ -0,0 +1,7 @@
+defmodule AltLocalPath.Mixfile do
+  use Mix.Project
+
+  def project do
+    [app: :alt_local_path, version: "1.0.0", dialyzer: [plt_local_path: "dialyzer"]]
+  end
+end