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mv "$BUILD" "$BUILD.backup" 2>/dev/null
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trap "[ -e "$BUILD.backup" ] && rm -rf "$BUILD" ; mv "$BUILD.backup" "$BUILD"" 0 1 2 15
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make build_$slideshow | tee >(zenity --progress --pulsate --title="$TITLE" --text="Building temporary slideshow for testing.\n<i>(make build_$slideshow)</i>" --auto-close)