--script parameter ignored on macOS

[p-kaczynski]

On macOS High Sierra v.10.13.6, when build.sh processes --script="<path>" using the following snippet:

# Parse arguments.
for i in "$@"; do
    case $1 in
        -s|--script) SCRIPT="$2"; shift ;;
        --) shift; CAKE_ARGUMENTS+=("$@"); break ;;
        *) CAKE_ARGUMENTS+=("$1") ;;
    esac
    shift
done

the line -s|--script) SCRIPT="$2"; shift ;; will NOT execute, because the use of = sign between --script and the path gets treated as a singular parameter, not equal to either -s or --script. Therefore the SCRIPT var is not overriden and if the script file is not in default location and/or named as in defaults the execution will fail.

Note, that this might work correctly on other systems, but due to time restrictions I did not test that.

[p-kaczynski]

Created PR: #109