Use .git path relative to parent project path

If the `project_path` configuration is present, the `.git` path will be
relative to the absolute path given in the configuration.

Author: qgadrian

lib/git/path.ex

@@ -3,10 +3,19 @@ defmodule GitHooks.Git.Path do
 
   alias GitHooks.Git
 
-  @doc false
+  @doc """
+  Returns the absolute `.git` path directory for the parent project.
+  """
   @spec resolve_git_hooks_path() :: any
   def resolve_git_hooks_path do
-    resolve_git_path_based_on_git_version("hooks")
+    path_for =
+      "hooks"
+      |> resolve_git_path_based_on_git_version()
+      |> Path.relative_to(resolve_app_path())
+
+    resolve_app_path()
+    |> Path.join(path_for)
+    |> String.replace(~r/\/+/, "/")
   end
 
   @doc false
@@ -20,6 +29,10 @@ defmodule GitHooks.Git.Path do
     Path.relative_to(project_path, repo_path)
   end
 
+  @doc """
+  Returns the absolute `.git` path directory for the parent project, appending
+  the given path.
+  """
   @spec git_hooks_path_for(path :: String.t()) :: String.t()
   def git_hooks_path_for(path) do
     __MODULE__.resolve_git_hooks_path()

test/git/path_test.exs

@@ -4,14 +4,29 @@ defmodule GitHooks.Git.PathTest do
   alias GitHooks.Git.Path
 
   describe "git_hooks_path_for/1" do
-    test "appends the path to the hooks folder" do
-      assert Path.git_hooks_path_for("/testing") == ".git/hooks/testing"
+    setup [:project_path]
+
+    test "appends the path to the `.git/hooks` folder", %{project_path: project_path} do
+      assert Path.git_hooks_path_for("/testing") == "#{project_path}/.git/hooks/testing"
     end
   end
 
   describe "resolve_git_hooks_path/0" do
-    test "returns the git path of the project" do
-      assert Path.resolve_git_hooks_path() == ".git/hooks"
+    setup [:project_path]
+
+    test "returns the git path of the project", %{project_path: project_path} do
+      assert Path.resolve_git_hooks_path() == "#{project_path}/.git/hooks"
     end
   end
+
+  #
+  # Private functions
+  #
+
+  defp project_path(_) do
+    {project_path, 0} = System.cmd("pwd", [])
+    project_path = String.replace(project_path, ~r/\n/, "")
+
+    {:ok, %{project_path: project_path}}
+  end
 end