subcommand restructure and bashstyle refactor. closes #1579

plugins/ps/subcommands/default

@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
+source "$PLUGIN_CORE_AVAILABLE_PATH/common/functions"
+
+ps_main_cmd() {
+  local desc="shows running processes in all running app containers"
+  local cmd="ps"
+  [[ -z $2 ]] && dokku_log_fail "Please specify an app to run the command on"
+
+  local APP="$2"; verify_app_name "$APP"
+  local DOKKU_APP_RUNNING_CONTAINER_IDS=$(get_app_running_container_ids "$APP")
+
+  ! (is_deployed "$APP") && echo "App $APP has not been deployed" && exit 0
+
+  for CID in $DOKKU_APP_RUNNING_CONTAINER_IDS; do
+    has_tty && DOKKU_RUN_OPTS="-i -t"
+    dokku_log_info1_quiet "running processes in container: $CID"
+    # shellcheck disable=SC2086
+    docker exec $DOKKU_RUN_OPTS $CID /bin/sh -c "ps auxwww"
+  done
+}
+
+ps_main_cmd "$@"