ssh-installer tool for macOS to `scp` a package to a remote host and install it

ssh-installer.sh

#!/bin/sh

PATH=/usr/bin:/bin:/usr/sbin:/sbin export PATH

# ssh-installer

# copies a pkg with scp and runs installer on target
# usage: ssh-installer [USER@]HOST PKGFILE [other installer options]

TMPPKGDIR="/private/tmp/ssh-installer/"

usage() {
	(>&2 echo "usage: ssh-installer [USER@]HOST PKGFILE [other installer options]")
	exit 1
}

if [ "$#" -lt 2 ]; then
	usage
fi

# read arguments
HOST=$1
PKGFILE=$2

shift 2

if [ ! -f ${PKGFILE} ]; then
	(>&2 echo "can't find ${PKGFILE}")
	exit 2
fi

PKGFILENAME=$(basename ${PKGFILE})

# grab everything after the @
HOSTNAME=$(echo "${HOST}" | cut -d @ -f 2)

if ! nc -z "${HOSTNAME}" 22; then
	(>&2 echo "host ${HOSTNAME} seems to be unreachable")
	exit 3
fi

ssh "${HOST}" "mkdir -p ${TMPPKGDIR}"
scp "${PKGFILE}" "${HOST}":"${TMPPKGDIR}"
echo "this next step may prompt for sudo on ${HOST}"
ssh -t "${HOST}" "sudo installer -pkg \"${TMPPKGDIR}${PKGFILENAME}\" $@"