Fix notification bug

Correctly handle exception when trying to display notification if
dbus-python is not available

README.md

@@ -20,6 +20,10 @@ The script uses rsync to actually run the backup, so you will have to install it
 sudo pacman -Syu rsync
 ```
 
+It's also required to have python-dotenv
+
+Optional dependencies are systemd-python to enable using systemd journal for logging, and dbus-python for desktop notifications.
+
 ## Install
 To install the program, first clone the repository:
 
@@ -27,23 +31,21 @@ To install the program, first clone the repository:
 git clone https://github.com/Fuxino/simple_backup.git
 ```
 
-Install tools required to build and install the package:
+Then install the tools required to build the package:
 
 ```bash
-pip install --upgrade build installer wheel
+pip install --upgrade build wheel
 ```
 
-Then run:
+Finally, run:
 
 ```bash
 cd simple_backup
 python -m build --wheel
-python -m installer dist/*.whl
+python -m pip install dist/*.whl
 ```
 
 For Arch Linux and Arch-based distros, two packages are available in the AUR (aur.archlinux.org):
 - **simple_backup** for the release version
 - **simple_backup-git** for the git version
 
-After installing, copy simple_backup.conf (if you used the PKGBUILD on Arch, it will be in /etc/simple_backup/) to $HOME/.config/simple_backup and edit is as needed.
-

setup.cfg

@@ -25,7 +25,12 @@ packages = simple_backup
 python_requires = >=3.7
 install_requires =
    python-dotenv
-   systemd-python
+
+[options.extras_require]
+JOURNAL =
+    systemd-python
+NOTIFICATIONS =
+    dbus-python
 
 [options.entry_points]
 console_scripts =

simple_backup.install

@@ -1,8 +0,0 @@
-post_install() {
-   echo "An example configuration file is found in /etc/simple_backup/simple_backup.conf."
-   echo "Copy it to ~/config/simple_backup/simple_backup.conf and modify it as needed"
-}
-
-post_upgrade() {
-   post_install
-}

simple_backup/simple_backup.py

@@ -250,7 +250,10 @@ class Backup:
             except NameError:
                 pass
         else:
-            notify('Backup finished')
+            try:
+                notify('Backup finished')
+            except NameError:
+                pass
 
 
 def _parse_arguments():