setup: set env $GIT_WORK_TREE when work tree is set, like $GIT_DIR

diff --git a/environment.c b/environment.c
index 9daa0ba4a36ced9f63541203e7bcc2ab9e1eae56..36fbba57fc83afd36d99bf5d4f3a1fc3feefba09 100644 (file)
--- a/environment.c
+++ b/environment.c
@@ -211,6 +211,8 @@ void set_git_work_tree(const char *new_work_tree)
        }
        git_work_tree_initialized = 1;
        work_tree = xstrdup(real_path(new_work_tree));
+       if (setenv(GIT_WORK_TREE_ENVIRONMENT, work_tree, 1))
+               die("could not set GIT_WORK_TREE to '%s'", work_tree);
 }
 
 const char *get_git_work_tree(void)