Fix AppImage installation

lastversion/Version.py

@@ -222,6 +222,7 @@ def is_prerelease(self):
 
     @property
     def even(self):
+        """Check if this is an even minor version"""
         return self.minor and not self.minor % 2
 
     def sem_extract_base(self, level=None):
@@ -233,9 +234,9 @@ def sem_extract_base(self, level=None):
             # get major
             return Version(str(self.major))
         if level == 'minor':
-            return Version("{}.{}".format(self.major, self.minor))
+            return Version(f"{self.major}.{self.minor}")
         if level == 'patch':
-            return Version("{}.{}.{}".format(self.major, self.minor, self.micro))
+            return Version(f"{self.major}.{self.minor}.{self.micro}")
         return self
 
     def __str__(self):

lastversion/lastversion.py

@@ -586,7 +586,9 @@ def main(argv=None):
         if args.action == 'install':
             app_images = [asset for asset in res['assets'] if asset.endswith('.AppImage')]
             if app_images:
-                return install_app_image(app_images[0], install_name=res.get('install_name', args.repo))
+                return install_app_image(
+                    app_images[0], install_name=res.get('install_name', args.repo)
+                )
             rpms = [asset for asset in res['assets'] if asset.endswith('.rpm')]
             if not rpms:
                 log.error('No assets found to install')

lastversion/utils.py

@@ -63,7 +63,6 @@ def asset_does_not_belong_to_machine(asset_name):
     Returns:
 
     """
-
     # replace underscore with dash so that our shiny word boundary regexes won't break
     asset_name = asset_name.replace('_', '-')
     asset_ext = os.path.splitext(asset_name)[1].lstrip('.')
@@ -130,7 +129,6 @@ def extract_appimage_desktop_file(appimage_path):
         str: Path to the extracted desktop file
 
     """
-
     temp_dir = tempfile.mkdtemp()
 
     # Extract the contents of the AppImage file to a temporary directory
@@ -149,8 +147,9 @@ def extract_appimage_desktop_file(appimage_path):
     # Install the .desktop file
     if desktop_file:
         # if xdg-desktop-menu is not available, we can't install the .desktop file
-        if shutil.which("xdg-desktop-menu"):
-            subprocess.call(["xdg-desktop-menu", "install", desktop_file])
+        xdg_desktop_menu_path = shutil.which("xdg-desktop-menu")
+        if xdg_desktop_menu_path:
+            subprocess.call([xdg_desktop_menu_path, "install", desktop_file])
         else:
             log.warning("xdg-desktop-menu is not available, can't install the .desktop file")