Add generate_secrets functionality

plugin.sh

@@ -7,6 +7,16 @@ PLUGIN_HOST=${PLUGIN_HOST:-swarm.autonomic.zone}
 PLUGIN_PORT=${PLUGIN_PORT:-222}
 PLUGIN_USER=${PLUGIN_USER:-drone}
 
+generate_secrets() {
+  echo "--- start secrets ---"
+  for SECRET in $(docker run --rm -v "${PWD}":/workdir mikefarah/yq yq r "$PLUGIN_COMPOSE" 'secrets.*.name'); do 
+    eval "echo \"generating $SECRET\""
+    PW=$(</dev/urandom tr -dc 'A-Za-z0-9' | head -c 40; echo)
+    eval "echo \"$PW\" | docker secret create \"$SECRET\" -"; 
+  done
+  echo "--- end secrets ---"
+}
+
 load_deploy_key() {
   mkdir -p "$HOME/.ssh/"
   ssh-keyscan -p "$PLUGIN_PORT" "$PLUGIN_HOST" > "$HOME/.ssh/known_hosts"
@@ -34,6 +44,11 @@ run_stack_wait() {
 run_plugin() {
   echo "--- start deployment ---"
   load_deploy_key
+
+  if [ -n "$PLUGIN_GENERATE_SECRETS" ]; then
+    generate_secrets
+  fi
+
   run_stack_deploy
   run_stack_wait
   echo "--- end deployment ---"