plasma-get-current-desktoptheme

#!/usr/bin/env sh
# vim: ft=sh ts=4 sw=4 sts=4 et :

main() {
    if ! command -v plasma-apply-desktoptheme >/dev/null 2>&1; then
        echo "plasma-apply-desktoptheme not found" >&2
        exit 1
    fi

    # Get list of desktop themes
    # Output format example:
    # * air
    # * default
    # * breeze-dark
    # * breeze-light (current theme for this Plasma session)
    output=$(plasma-apply-desktoptheme --list-themes 2>/dev/null) || {
        echo "Failed to get desktop themes" >&2
        exit 1
    }

    current_theme=$(printf '%s\n' "$output" |
        grep -F "(current theme for this Plasma session)" |
        sed -n 's/^ \* \(.*\) (current theme for this Plasma session)/\1/p')

    if [ -z "$current_theme" ]; then
        echo "No current desktop theme found" >&2
        exit 1
    fi

    printf '%s\n' "$current_theme"
}

main "$@"