Added optional env variable: SCRIPT_TORRENT_DONE_FILENAME

* Optional env variable that sets script-torrent-done-filename and enables script-torrent-done-enabled
* Updated readme-vars

readme-vars.yml

@@ -45,6 +45,7 @@ opt_param_env_vars:
   - { env_var: "WHITELIST", env_value: "", desc: "Specify an optional list of comma separated ip whitelist. Fills rpc-whitelist setting."}
   - { env_var: "PEERPORT", env_value: "", desc: "Specify an optional port for torrent TCP/UDP connections. Fills peer-port setting."}
   - { env_var: "HOST_WHITELIST", env_value: "", desc: "Specify an optional list of comma separated dns name whitelist. Fills rpc-host-whitelist setting."}
+  - { env_var: "SCRIPT_TORRENT_DONE_FILENAME", env_value: "", desc: "Specify the path to a script to run when torrent download is complete. Fills script-torrent-done-filename setting." }
 opt_param_usage_include_vols: false
 opt_param_usage_include_ports: false
 opt_param_device_map: false
@@ -78,8 +79,13 @@ app_setup_block: |
   
   Use `PEERPORT` to specify the port(s) Transmission should listen on.  This disables random port selection.  This should be the same as the port mapped in your docker configuration.
 
+  ## Using script torrent done filename
+
+  Use `SCRIPT_TORRENT_DONE_FILENAME` to specify a path to a script to run when a dowload completes. This enables `script-torrent-done-enabled`. When `SCRIPT_TORRENT_DONE_FILENAME` is empty, `script-torrent-done-enabled` is disabled.
+
 # changelog
 changelogs:
+  - { date: "13.07.23:", desc: "Add optional script_torrent_done_filename environment variable." }
   - { date: "10.06.23:", desc: "Bump unrar to 6.2.8, install transmission-extra." }
   - { date: "25.05.23:", desc: "Deprecate armhf." }
   - { date: "14.05.23:", desc: "Explicitly install transmission-remote." }

root/etc/s6-overlay/s6-rc.d/init-transmission-config/run

@@ -28,6 +28,14 @@ else
     sed -i "/\"rpc-whitelist\"/c\    \"rpc-whitelist\": \"$WHITELIST\"," /config/settings.json
 fi
 
+if [[ -n "$SCRIPT_TORRENT_DONE_FILENAME" ]]; then
+    sed -i '/script-torrent-done-enabled/c\    "script-torrent-done-enabled": true,' /config/settings.json
+    sed -i "/\"script-torrent-done-filename\"/c\    \"script-torrent-done-filename\": \"$SCRIPT_TORRENT_DONE_FILENAME\"," /config/settings.json
+else
+    sed -i '/script-torrent-done-enabled/c\    "script-torrent-done-enabled": false,' /config/settings.json
+    sed -i "/\"script-torrent-done-filename\"/c\    \"script-torrent-done-filename\": \"$SCRIPT_TORRENT_DONE_FILENAME\"," /config/settings.json
+fi
+
 if [[ -n "$HOST_WHITELIST" ]]; then
     sed -i '/rpc-host-whitelist-enabled/c\    "rpc-host-whitelist-enabled": true,' /config/settings.json
     sed -i "/\"rpc-host-whitelist\"/c\    \"rpc-host-whitelist\": \"$HOST_WHITELIST\"," /config/settings.json