Install Crash on Jessie

Debian Jessie, crash during bootstrap:

The time is currently set to Wed Apr  8 11:34:17 CDT 2020.
Is this correct? [Y/n]:

Fixing any broken installations before proceeding.
Reading package lists...
Building dependency tree...
Reading state information...
0 upgraded, 0 newly installed, 0 to remove and 1 not upgraded.
bash: line 447: "1586363659" - "1586362526": syntax error: operand expected (error token is ""1586363659" - "1586362526"")

Crash is in the routine which checks for the last update (which is ironic):

brewpi-tools-rmx/bootstrap.sh

Lines 445 to 451 in 6ef1cba

    
           lastUpdate=$(stat -c %Y /var/lib/apt/lists) 
        
           nowTime=$(date +%s) 
        
           if [ $(("$nowTime" - "$lastUpdate")) -gt 604800 ] ; then 
        
               echo -e "\nLast apt update was over a week ago. Running apt update before updating" 
        
               echo -e "dependencies." 
        
               apt-get update -yq||die 
        
           fi

The issue appears to be caused by treating $lastUpdate and $nowTime the same as one would a string. Removing the quotes and the $-prefix cleared it up. Interesting that this was not an issue on Stretch or Buster.

Resolved in devel, will merge eventually.

	lastUpdate=$(stat -c %Y /var/lib/apt/lists)
	nowTime=$(date +%s)
	if [ $(("$nowTime" - "$lastUpdate")) -gt 604800 ] ; then
	echo -e "\nLast apt update was over a week ago. Running apt update before updating"
	echo -e "dependencies."
	apt-get update -yq\|\|die
	fi