deploy/routeros.sh: make ssh/scp configurable

In order to modify ssh/scp commands make them configurable via
environment variables.

Signed-off-by: Andreas Bießmann <andreas@biessmann.org>

deploy/routeros.sh

@@ -49,6 +49,16 @@
 # One optional thing to do as well is to create a script that updates
 # all the required services and run that script in a single command.
 #
+# To adopt parameters to `scp` and/or `ssh` set the optional
+# `ROUTER_OS_SSH_CMD` and `ROUTER_OS_SCP_CMD` variables accordingly,
+# see ssh(1) and scp(1) for parameters to those commands.
+#
+# Example:
+# ```ssh
+# export ROUTER_OS_SSH_CMD="ssh -i /acme.sh/.ssh/router.example.com -o UserKnownHostsFile=/acme.sh/.ssh/known_hosts"
+# export ROUTER_OS_SCP_CMD="scp -i /acme.sh/.ssh/router.example.com -o UserKnownHostsFile=/acme.sh/.ssh/known_hosts"
+# ````
+#
 # returns 0 means success, otherwise error.
 
 ########  Public functions #####################
@@ -88,6 +98,20 @@ routeros_deploy() {
     ROUTER_OS_PORT=22
   fi
 
+  _getdeployconf ROUTER_OS_SSH_CMD
+
+  if [ -z "$ROUTER_OS_SSH_CMD" ]; then
+    _debug "Use default ssh setup."
+    ROUTER_OS_SSH_CMD="ssh -p $ROUTER_OS_PORT"
+  fi
+
+  _getdeployconf ROUTER_OS_SCP_CMD
+
+  if [ -z "$ROUTER_OS_SCP_CMD" ]; then
+    _debug "USe default scp setup."
+    ROUTER_OS_SCP_CMD="scp -P $ROUTER_OS_PORT"
+  fi
+
   _getdeployconf ROUTER_OS_ADDITIONAL_SERVICES
 
   if [ -z "$ROUTER_OS_ADDITIONAL_SERVICES" ]; then
@@ -98,12 +122,14 @@ routeros_deploy() {
   _savedeployconf ROUTER_OS_HOST "$ROUTER_OS_HOST"
   _savedeployconf ROUTER_OS_USERNAME "$ROUTER_OS_USERNAME"
   _savedeployconf ROUTER_OS_PORT "$ROUTER_OS_PORT"
+  _savedeployconf ROUTER_OS_SSH_CMD "$ROUTER_OS_SSH_CMD"
+  _savedeployconf ROUTER_OS_SCP_CMD "$ROUTER_OS_SCP_CMD"
   _savedeployconf ROUTER_OS_ADDITIONAL_SERVICES "$ROUTER_OS_ADDITIONAL_SERVICES"
 
   _info "Trying to push key '$_ckey' to router"
-  scp -P "$ROUTER_OS_PORT" "$_ckey" "$ROUTER_OS_USERNAME@$ROUTER_OS_HOST:$_cdomain.key"
+  $ROUTER_OS_SCP_CMD "$_ckey" "$ROUTER_OS_USERNAME@$ROUTER_OS_HOST:$_cdomain.key"
   _info "Trying to push cert '$_cfullchain' to router"
-  scp -P "$ROUTER_OS_PORT" "$_cfullchain" "$ROUTER_OS_USERNAME@$ROUTER_OS_HOST:$_cdomain.cer"
+  $ROUTER_OS_SCP_CMD "$_cfullchain" "$ROUTER_OS_USERNAME@$ROUTER_OS_HOST:$_cdomain.cer"
   DEPLOY_SCRIPT_CMD="/system script add name=\"LE Cert Deploy - $_cdomain\" owner=admin policy=ftp,read,write,password,sensitive \
 source=\"## generated by routeros deploy script in acme.sh;\
 \n/certificate remove [ find name=$_cdomain.cer_0 ];\
@@ -120,11 +146,11 @@ source=\"## generated by routeros deploy script in acme.sh;\
 \n\"
 "
   # shellcheck disable=SC2029
-  ssh -p "$ROUTER_OS_PORT" "$ROUTER_OS_USERNAME@$ROUTER_OS_HOST" "$DEPLOY_SCRIPT_CMD"
+  $ROUTER_OS_SSH_CMD "$ROUTER_OS_USERNAME@$ROUTER_OS_HOST" "$DEPLOY_SCRIPT_CMD"
   # shellcheck disable=SC2029
-  ssh -p "$ROUTER_OS_PORT" "$ROUTER_OS_USERNAME@$ROUTER_OS_HOST" "/system script run \"LE Cert Deploy - $_cdomain\""
+  $ROUTER_OS_SSH_CMD "$ROUTER_OS_USERNAME@$ROUTER_OS_HOST" "/system script run \"LE Cert Deploy - $_cdomain\""
   # shellcheck disable=SC2029
-  ssh -p "$ROUTER_OS_PORT" "$ROUTER_OS_USERNAME@$ROUTER_OS_HOST" "/system script remove \"LE Cert Deploy - $_cdomain\""
+  $ROUTER_OS_SSH_CMD "$ROUTER_OS_USERNAME@$ROUTER_OS_HOST" "/system script remove \"LE Cert Deploy - $_cdomain\""
 
   return 0
 }