Modernize imports

We now use relative imports and a `__main__` file, so that it can be
called with `python -m rofi_rbw` (additionally to the classical entry
point `rofi-rbw`).

setup.cfg

@@ -28,4 +28,4 @@ install_requires =
 
 [options.entry_points]
 console_scripts =
-    rofi-rbw = rofi_rbw.rofi_rbw:main
+    rofi-rbw = rofi_rbw.__main__:main

src/rofi_rbw/__main__.py

@@ -0,0 +1,9 @@
+from .rofi_rbw import RofiRbw
+
+
+def main():
+    RofiRbw().main()
+
+
+if __name__ == '__main__':
+    main()

src/rofi_rbw/clipboarder.py

@@ -1,12 +1,7 @@
 import time
 from subprocess import run
 
-try:
-    from rofi_rbw.abstractionhelper import is_wayland, is_installed
-    from rofi_rbw.typer import Typer
-except ModuleNotFoundError:
-    from abstractionhelper import is_wayland, is_installed
-    from typer import Typer
+from .abstractionhelper import is_wayland, is_installed
 
 
 class Clipboarder:

src/rofi_rbw/credentials.py

@@ -1,10 +1,7 @@
 from subprocess import run
 from typing import Union, Optional, List
 
-try:
-    from rofi_rbw.models import Target, Targets
-except ModuleNotFoundError:
-    from models import Target, Targets
+from .models import Target, Targets
 
 
 class Credentials:

src/rofi_rbw/rofi_rbw.py

@@ -1,28 +1,17 @@
-#!/usr/bin/env python3
-# -*- coding: utf-8 -*-
 import argparse
 import shlex
 from subprocess import run
 from typing import List, Tuple, Union
 
 import configargparse
 
-try:
-    from rofi_rbw.models import Action, Target, Targets, CANCEL, DEFAULT
-    from rofi_rbw.clipboarder import Clipboarder
-    from rofi_rbw.typer import Typer
-    from rofi_rbw.selector import Selector
-    from rofi_rbw.credentials import Credentials
-    from rofi_rbw.entry import Entry
-    from rofi_rbw.paths import *
-except ModuleNotFoundError:
-    from models import Action, Target, Targets, CANCEL, DEFAULT
-    from clipboarder import Clipboarder
-    from typer import Typer
-    from selector import Selector
-    from credentials import Credentials
-    from entry import Entry
-    from paths import *
+from .models import Action, Target, Targets, CANCEL, DEFAULT
+from .clipboarder import Clipboarder
+from .typer import Typer
+from .selector import Selector
+from .credentials import Credentials
+from .entry import Entry
+from .paths import *
 
 __version__ = '1.0.0-RC1'
 
@@ -225,11 +214,3 @@ def execute_action(self, cred: Credentials) -> None:
                 self.clipboarder.clear_clipboard_after(self.args.clear)
         elif self.args.action == Action.PRINT:
             print('\n'.join([cred[target] for target in self.args.targets]))
-
-
-def main():
-    RofiRbw().main()
-
-
-if __name__ == "__main__":
-    main()

src/rofi_rbw/selector.py

@@ -1,12 +1,8 @@
 from subprocess import run
 from typing import List, Tuple, Union
 
-try:
-    from rofi_rbw.abstractionhelper import is_wayland, is_installed
-    from rofi_rbw.models import Action, Target, Targets, CANCEL, DEFAULT
-except:
-    from abstractionhelper import is_wayland, is_installed
-    from models import Action, Target, Targets, CANCEL, DEFAULT
+from .abstractionhelper import is_wayland, is_installed
+from .models import Action, Target, Targets, CANCEL, DEFAULT
 
 
 class Selector:

src/rofi_rbw/typer.py

@@ -1,10 +1,7 @@
 from subprocess import run
 import time
 
-try:
-    from rofi_rbw.abstractionhelper import is_wayland, is_installed
-except ModuleNotFoundError:
-    from abstractionhelper import is_wayland, is_installed
+from .abstractionhelper import is_wayland, is_installed
 
 
 class Typer: