Quickly patch Vesktop desktop icon with your own on Linux systems

patchVesktopIcon.sh

#!/bin/bash

DESKTOP_FILE="/var/lib/flatpak/exports/share/applications/dev.vencord.Vesktop.desktop"


# check if vesktop .desktop file exists
if [[ ! -f "$DESKTOP_FILE" ]]; then
    echo "Error: Desktop file '$DESKTOP_FILE' not found. Are you sure you installed Vesktop via Flatpak?"
    exit 1
fi


# If you want to hardcode the new icon for the script to always use the same image, you can 
# modify `NEW_ICON_PATH="$1"` line to e.g. `NEW_ICON_PATH="/home/you/Pictures/discord-logo.png"`
NEW_ICON_PATH="$1"
# the value "$1" means it will take user argument as the file


# check if new icon path is was provided as the first argument
if [[ -z "$NEW_ICON_PATH" ]]; then
    echo "Usage: $0 <newIconPath>"
    exit 1
fi

# ensure provided file exists
if [[ ! -f "$NEW_ICON_PATH" ]]; then
    echo "Error: File $NEW_ICON_PATH does not exist"
    exit 1
fi

# get the current Icon value
CURRENT_ICON=$(grep "^Icon=" "$DESKTOP_FILE" | cut -d'=' -f2)

# if line starting with Icon= doesn't exist, append it
if ! grep -q "^Icon=" "$DESKTOP_FILE"; then

    echo "Error: Line starting with Icon= was not found, appending it to the file with new value..."
    sudo echo "Icon=$NEW_ICON_PATH" >> "$DESKTOP_FILE"
    ECHO_EXIT_CODE=$?
    
    if [[ $ECHO_EXIT_CODE == 0 ]]; then
        echo "Successfully appended Icon=$NEW_ICON_PATH line to the file."
    else
        echo "Error: Failed to modify file contents, echo command failed with exit code $ECHO_EXIT_CODE"
        exit 1;
    fi
    
else
    # otherwise, replace the value with new one
    sudo sed -i "s|^Icon=.*|Icon=$NEW_ICON_PATH|" "$DESKTOP_FILE"
    SED_EXIT_CODE=$?
    
    if [[ $SED_EXIT_CODE == 0 ]]; then
        if [[ "$CURRENT_ICON" == "dev.vencord.Vesktop" ]]; then
            echo "Successfully replaced default icon."
        else
            echo "Successfully replaced user-changed icon (previous value was '$CURRENT_ICON')."
        fi
    else
        echo "Error: Failed to modify file contents, sed command failed with exit code $SED_EXIT_CODE"
        exit 1;
    fi
    
fi

# if the user is using GNOME, update the desktop database
if [[ $(echo $XDG_CURRENT_DESKTOP) == "GNOME" ]]; then
    echo "Updating GNOME desktop database..."
    update-desktop-database ~/.local/share/applications
    UDD_EXIT_CODE=$?
    
    if [ ! $UDD_EXIT_CODE == 0 ]; then
        echo "Error: Failed to update desktop database, failed with exit code $UDD_EXIT_CODE. You might need to force the update manually."
    fi
fi

echo "Operation completed."