"Browse"-button on directory-selection dialogs

install.sh

@@ -1,14 +1,28 @@
 #!/bin/bash
+# """
+# project: Backuppy
+# version: 0.8
+# file: install.sh
+# summary: main entry shell script
+# """
 
 # Check if graphical installer should be executed
 if [ "$1" == "--gui" ]; then
+    # Check if PIP ist installed
     if ! command -v pip3> /dev/null
     then
         echo "Please install PIP on your system for the graphical version of Backuppy!"
         exit
     fi
-    pip3 install pyside2
+    # Check if PIP module "PySide2" is installed
+    if ! pip list | grep PySide2> /dev/null
+    then
+      # Install PySide2
+      pip3 install PySide2
+    fi
+    # Launch python installer in GUI mode
     python3 -B install.py "$1"
 else
+    # Launch python installer in CLI mode
     python3 -B install.py
 fi