Bastian Bittorf 1053340124 setup/preflight.sh: fix some minor shellcheck complaints (#2342) ...

This file passes shellcheck now without errors.
This paritally fixes #1457 - the former errors where:

$ shellcheck setup/preflight.sh

In setup/preflight.sh line 1:
^-- SC2148 (error): Tips depend on target shell and yours is unknown. Add a shebang or a 'shell' directive.

In setup/preflight.sh line 29:
if [ $TOTAL_PHYSICAL_MEM -lt 490000 ]; then
     ^-----------------^ SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean:
if [ "$TOTAL_PHYSICAL_MEM" -lt 490000 ]; then

In setup/preflight.sh line 31:
	TOTAL_PHYSICAL_MEM=$(expr \( \( $TOTAL_PHYSICAL_MEM \* 1024 \) / 1000 \) / 1000)
                             ^--^ SC2003 (style): expr is antiquated. Consider rewriting this using $((..)), ${} or [[ ]].
                                        ^-----------------^ SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean:
	TOTAL_PHYSICAL_MEM=$(expr \( \( "$TOTAL_PHYSICAL_MEM" \* 1024 \) / 1000 \) / 1000)

In setup/preflight.sh line 38:
if [ $TOTAL_PHYSICAL_MEM -lt 750000 ]; then
     ^-----------------^ SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean:
if [ "$TOTAL_PHYSICAL_MEM" -lt 750000 ]; then

For more information:
  https://www.shellcheck.net/wiki/SC2148 -- Tips depend on target shell and y...
  https://www.shellcheck.net/wiki/SC2086 -- Double quote to prevent globbing ...
  https://www.shellcheck.net/wiki/SC2003 -- expr is antiquated. Consider rewr...

2024-03-10 08:01:13 -04:00

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