UI deb package improvements

* Purge files when using apt remove --purge
* Display a message to uninstall installed pkgs from pypi when invoking
apt remove
* link autostart .desktop file to /usr/share/applications instead of
copying it

ui/debian/postinst

@@ -2,23 +2,17 @@
 
 set -e
 
-for i in $(ls /home)
+install_pip_pkgs()
-do
+{
-    path=/home/$i/.config/autostart/
-    if [ ! -d $path ]; then
-        mkdir -p $path
-    fi
-    if [ -f /usr/share/applications/opensnitch_ui.desktop ];then
-        cp /usr/share/applications/opensnitch_ui.desktop $path
-    fi
-done
-
-
     DIALOG=$(which whiptail || which dialog)
 
-$DIALOG --yesno "OpenSnitch GUI needs to install 3 more packages from
+    $DIALOG --yesno "OpenSnitch GUI needs to install 3 more packages:
-pypi using pip3: unicode_slugify, grpcio-tools and protobuf.\n\nDo you want to install them
+    unicode_slugify, grpcio-tools and protobuf.
-now?" 15 60
+    
+    Note: It's better to install them as regular user instead of root:
+    pip3 install --user unicode_slugify protobuf grpcio-tools
+
+    Do you want to install them now?" 15 70 ||
     if [ $? -eq 0 ]; then
         echo "Installing grpcio-tools..."
         pip3 install grpcio-tools || echo "Unable to install grpcio, try it manually."
@@ -29,3 +23,25 @@ if [ $? -eq 0 ]; then
         echo "Installing slugify..."
         pip3 install unicode_slugify || echo "Unable to install unicode_slugify, try it manually."
     fi
+    exit 0
+}
+
+for i in $(ls /home)
+do
+    path=/home/$i/.config/autostart/
+    if [ ! -d $path ]; then
+        mkdir -p $path
+    fi
+    if [ -f /usr/share/applications/opensnitch_ui.desktop ];then
+        ln -s /usr/share/applications/opensnitch_ui.desktop $path || true
+    fi
+done
+
+set +e
+
+case "$1" in
+    configure)
+        install_pip_pkgs
+        ;;
+esac
+

ui/debian/postrm

@@ -0,0 +1,23 @@
+#!/bin/sh
+
+set -e
+
+purge_files()
+{
+    for i in $(ls /home)
+    do
+        path=/home/$i/.config/
+        if [ -h $path/autostart/opensnitch_ui.desktop -o -f $path/autostart/opensnitch_ui.desktop ];then
+            rm -f $path/autostart/opensnitch_ui.desktop
+        fi
+        if [ -d $path/opensnitch/ ]; then
+            rm -rf $path/opensnitch/
+        fi
+    done
+}
+
+case "$1" in
+    purge)
+        purge_files
+        ;;
+esac

ui/debian/prerm

@@ -2,14 +2,9 @@
 
 set -e
 
-for i in $(ls /home)
-do
-    path=/home/$i/.config/autostart/opensnitch_ui.desktop
-    if [ -f $path ];then
-        rm -f $path
-    fi
-done
 
+case "$1" in
+    remove)
         echo
         echo " If you don't need them anymore, remember to uninstall unicode_slugify, grcpio-tools and protobuf:"
         echo
@@ -17,3 +12,6 @@ echo "  pip3 uninstall unicode_slugify"
         echo "  pip3 uninstall grcpio-tools"
         echo "  pip3 uninstall protobuf"
         echo
+
+        ;;
+esac