system-tools/create_folder.sh

#!/bin/bash
#
# create_folder.sh — Detect the current Linux distro and dispatch to the
# matching distro-specific folder-creation script.
# Usage: su -c "./create_folder.sh <foldername>" or sudo ./create_folder.sh <foldername>
#
# The distro-specific scripts (_create_folder_fedora.sh, _create_folder_ubuntu.sh)
# are prefixed with an underscore so they don't clutter tab-completion for
# "create_folder".
#

set -euo pipefail

RED='\033[0;31m'
NC='\033[0m' # No Color

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"

if [[ ! -r /etc/os-release ]]; then
    echo -e "${RED}ERROR: Cannot detect distro (/etc/os-release not found).${NC}" >&2
    exit 1
fi

# shellcheck disable=SC1091
source /etc/os-release
DISTRO_ID="${ID:-}"
DISTRO_ID_LIKE="${ID_LIKE:-}"

case "$DISTRO_ID $DISTRO_ID_LIKE" in
    *fedora*|*rhel*)
        TARGET="$SCRIPT_DIR/_create_folder_fedora.sh"
        ;;
    *ubuntu*|*debian*)
        TARGET="$SCRIPT_DIR/_create_folder_ubuntu.sh"
        ;;
    *)
        echo -e "${RED}ERROR: Unsupported distro '$DISTRO_ID' (ID_LIKE='$DISTRO_ID_LIKE').${NC}" >&2
        exit 1
        ;;
esac

if [[ ! -x "$TARGET" ]]; then
    echo -e "${RED}ERROR: Expected script not found or not executable: $TARGET${NC}" >&2
    exit 1
fi

exec "$TARGET" "$@"