deploy/copy.sh

 1#!/bin/sh
 2# Copy one file to the host: rsync when the host has it, since a stalled
 3# transfer then resumes and the bytes are compressed on the wire; scp -C
 4# otherwise. Both deploy targets go through here so neither can assume a
 5# tool the host lacks.
 6#
 7#   deploy/copy.sh <host> <port> <local-file> <remote-path>
 8set -eu
 9host=$1 port=$2 src=$3 dst=$4
10if ssh -p "$port" "root@$host" 'command -v rsync >/dev/null 2>&1'; then
11  rsync --partial --inplace -z -e "ssh -p $port" "$src" "root@$host:$dst"
12else
13  scp -C -P "$port" "$src" "root@$host:$dst"
14fi