Use jinja2.PackageLoader instead FS (#4)

Author: rndmit

pycli/app.py

@@ -47,7 +47,7 @@ def __init__(self,
             descr: discription of your application
             global_opts: Options which will be parsed with all commands
         """
-        self.__messager = Messager(jinja2.FileSystemLoader("pycli/templates"))
+        self.__messager = Messager()
         self.root_cmd = self.RootCommand(name, descr, self.opt_help)
         if global_opts:
             self.root_cmd.opts += global_opts

pycli/output.py

@@ -9,9 +9,9 @@ class Messager(object):
     console: Console
     template_engine: jinja2.Environment
 
-    def __init__(self, templates: jinja2.BaseLoader) -> None:
+    def __init__(self) -> None:
         self.console = Console()
-        self.template_engine = jinja2.Environment(loader=templates)
+        self.template_engine = jinja2.Environment(loader=jinja2.PackageLoader("pycli", "templates"))
 
     def show_help(self, cmd: Command, cpath: list[str]):
         self.console.print(