Add directory of file to run to sys path (#947)

sandbox/darren/screens_focus.py

@@ -3,6 +3,8 @@ from textual.binding import Binding
 from textual.screen import Screen
 from textual.widgets import Static, Footer, Input
 
+from some_text import TEXT
+
 
 class Focusable(Static, can_focus=True):
     pass
@@ -10,11 +12,11 @@ class Focusable(Static, can_focus=True):
 
 class CustomScreen(Screen):
     def compose(self) -> ComposeResult:
-        yield Focusable(f"Screen {id(self)} - two")
+        yield Focusable(f"Screen {id(self)} - two {TEXT}")
         yield Focusable(f"Screen {id(self)} - three")
         yield Focusable(f"Screen {id(self)} - four")
         yield Input(placeholder="Text input")
-        yield Footer()
+        # yield Footer()
 
 
 class ScreensFocusApp(App):
@@ -30,7 +32,7 @@ class ScreensFocusApp(App):
         yield Focusable("App - two")
         yield Focusable("App - three")
         yield Focusable("App - four")
-        yield Footer()
+        # yield Footer()
 
     def action_push_new_screen(self):
         self.push_screen(CustomScreen())

sandbox/darren/some_text.py

@@ -0,0 +1 @@
+TEXT = "ABCDEFG"

src/textual/_import_app.py

@@ -3,6 +3,7 @@ from __future__ import annotations
 import os
 import runpy
 import shlex
+from pathlib import Path
 from typing import cast, TYPE_CHECKING
 
 
@@ -38,6 +39,7 @@ def import_app(import_name: str) -> App:
 
     if lib.endswith(".py"):
         path = os.path.abspath(lib)
+        sys.path.append(str(Path(path).parent))
         try:
             global_vars = runpy.run_path(path, {})
         except Exception as error:

src/textual/cli/cli.py

@@ -1,15 +1,10 @@
 from __future__ import annotations
 
-from typing import TYPE_CHECKING
-
 import click
 from importlib_metadata import version
 from textual.devtools.server import _run_devtools
 from textual._import_app import import_app, AppFail
 
-if TYPE_CHECKING:
-    from textual.app import App
-
 
 @click.group()
 @click.version_option(version("textual"))