Add config to set a path where to run the hooks

lib/git/path.ex

@@ -14,6 +14,13 @@ defmodule GitHooks.Git.Path do
     end
   end
 
+  @doc false
+  def resolve_app_path do
+    git_dir = Application.get_env(:git_hooks, :git_path, &resolve_git_hooks_path/0)
+    repo_dir = Path.dirname(git_dir)
+    Path.relative_to(File.cwd!(), repo_dir)
+  end
+
   @spec git_hooks_path_for(path :: String.t()) :: String.t()
   def git_hooks_path_for(path) do
     __MODULE__.resolve_git_hooks_path()

lib/mix/tasks/git_hooks/install.ex

@@ -43,6 +43,7 @@ defmodule Mix.Tasks.GitHooks.Install do
     Printer.info("Installing git hooks...")
 
     mix_path = Config.mix_path()
+    project_path = GitPath.resolve_app_path()
 
     ensure_hooks_folder_exists()
     clean_missing_hooks()
@@ -61,6 +62,7 @@ defmodule Mix.Tasks.GitHooks.Install do
             body
             |> String.replace("$git_hook", git_hook_atom_as_string)
             |> String.replace("$mix_path", mix_path)
+            |> String.replace("$project_path", project_path)
 
           unless opts[:quiet] || !Config.verbose?() do
             Printer.info(

priv/hook_template

@@ -1,5 +1,7 @@
 #!/bin/sh
 
+[ "$project_path" != "" ] && cd $project_path
+
 $mix_path git_hooks.run $git_hook "$@"
 [ $? -ne 0 ] && exit 1
 exit 0