Anyone who's been using computers for a while (any OS, not just Linux) will be aware that uninstalling an app doesn't always remove all data associated
  •  brie   ( @brie@beehaw.org ) English
    4•11 months ago

    For fun, a shell script for the same functionality:

    #!/bin/sh
br="$(printf "\n")" # Obtain a line-break

# If RM_CMD is unset, use trash-cli
if [ -z ${RM_CMD+y} ]; then RM_CMD="trash"; fi

# List of apps. The leading br is necessary for later pattern matching
apps="$br$(flatpak list --columns=application)" || exit 1

cd ~/.var/app || exit 1

for app in *; do
	case "$apps" in
		*"$br$app$br"*) ;; # Matches if $app is in the list (installed)
		*)
			printf 'Removing app data %s\n' "${app}"
			"$RM_CMD" "./${app}"
			;;
	esac
done

    (May eat your files)

    •  Pantherina   ( @Pantherina@feddit.de ) 
      3•11 months ago

      Pretty complicated

      #!/bin/bash

# List contents of ~/.var/app/
files=$(ls -1 ~/.var/app/)

# Loop through each element of the folder
for file in $files; do
    # Set the name as a variable
    app_name="${file##*/}"

    # Check if a flatpak app of that name is installed
    if ! flatpak list 2> /dev/null | grep -qw $app_name; then
        # Ask the user to delete the folder
        read -p "The app $app_name is not installed. Do you want to delete its folder? (y/n): " choice
        case "$choice" in
            [Yy]* )
                # Remove the folder recursively
                rm -rf ~/.var/app/$file;;
            [Nn]* )
                echo "Skipping deletion of $app_name folder.";;
            * )
                echo "Invalid input. Skipping deletion of $app_name folder.";;
        esac
    fi
done

echo "All Apps checked."
      •  brie   ( @brie@beehaw.org ) 
        1•11 months ago

        The check for if a package is installed can be simplified using flatpak info.

        $ flatpak info com.example.Nonexistent &>/dev/null; echo $?
1
$ flatpak info org.mozilla.firefox &>/dev/null; echo $?    
0
    •  brie   ( @brie@beehaw.org ) 
      2•11 months ago

      This is kind of a shortcoming of all package management in general; should deleting the package delete your user data? There’s an argument to be made that data should be removed with the application, but deleting data irrecoverably as the default isn’t necessarily the easiest approach.

      There’s also another problem, which is that the behaviour of deleting data may make sense for per-user applications, but for system-wide apps, should uninstalling an application start nuking data in people’s homedirs?