feat: add set_port.sh script

We're using this new script to change the port forwarded in transmission
No need for docker containers crashing anymore.

Author: fcastilloec

get_port.sh

@@ -90,7 +90,7 @@ current_port=$(jq -r '."peer-port"' "${transmission_settings}")
 
 # Check if changes are needed
 if [[ ${current_port} -eq ${port} ]]; then
-  echo "Nothing to do, port is already in used"
+  echo "Nothing to do, port ${port} is already in used"
   exit 0
 fi
 

set_port.sh

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+
+trap 'exit 0' SIGTERM
+
+readonly root_dir="/home/felipe/workspace/containers/pia-transmission-prowlarr"
+readonly transmission_port="${root_dir}/data/pia-port/port.dat"
+
+if ! transmission-remote -l 2>/dev/null; then # Checks that Transmission is running
+  >&2 echo "Transmission not running."; exit 1
+fi
+
+if ! [[ -f ${transmission_port} && -r ${transmission_port} ]]; then
+  >&2 echo "Port file doesn't exist or is not readable!"; exit 1
+fi
+
+# Reading port
+PORT=$(cat "${transmission_port}")
+echo "Port read from file (${PORT})"
+
+# Changing port
+transmission-remote -p "${PORT}"
+sleep 2
+# Testing port
+if [[ $(transmission-remote -pt) != "Port is open: Yes" ]]; then
+  echo "Transmission port (${PORT}) is not open!"; exit 1
+fi
+
+exit 0