address review comments

Author: SandrineP

src/subcommand/init_subcommand.cpp

@@ -31,7 +31,10 @@ void init_subcommand::run()
     else
     {
         git_repository_init_options opts = GIT_REPOSITORY_INIT_OPTIONS_INIT;
-        if (m_bare) {opts.flags |= GIT_REPOSITORY_INIT_BARE;}
+        if (m_bare)
+        {
+            opts.flags |= GIT_REPOSITORY_INIT_BARE;
+        }
         opts.initial_head = m_branch.c_str();
 
         auto repo = repository_wrapper::init_ext(m_directory, &opts);
@@ -42,7 +45,14 @@ void init_subcommand::run()
     if (m_bare)
     {
         size_t pos = git_path.find(".git/");
-        path = git_path.substr(0, pos);
+        if (pos != std::string::npos)
+        {
+            path = git_path.substr(0, pos);
+        }
+        else
+        {
+            throw git_exception("'.git/' not found in the path of the repository.", git2cpp_error_code::FILESYSTEM_ERROR);
+        }
     }
     else
     {