添加 mysql redis postgres 插件

plugins/postgres/subcommands/export

@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+source "$(dirname "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)")/config"
+set -eo pipefail
+[[ $DOKKU_TRACE ]] && set -x
+source "$PLUGIN_CORE_AVAILABLE_PATH/common/functions"
+source "$(dirname "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)")/functions"
+
+service-export-cmd() {
+  #E by default, datastore output is exported to stdout
+  #E dokku $PLUGIN_COMMAND_PREFIX:export lollipop
+  #E you can redirect this output to a file
+  #E dokku $PLUGIN_COMMAND_PREFIX:export lollipop > data.dump
+  #A service, service to run command against
+  declare desc="export a dump of the $PLUGIN_SERVICE service database"
+  local cmd="$PLUGIN_COMMAND_PREFIX:export" argv=("$@")
+  [[ ${argv[0]} == "$cmd" ]] && shift 1
+  declare SERVICE="$1"
+  is_implemented_command "$cmd" || dokku_log_fail "Not yet implemented"
+
+  [[ -z "$SERVICE" ]] && dokku_log_fail "Please specify a valid name for the service"
+  verify_service_name "$SERVICE"
+  service_export "$SERVICE"
+}
+
+service-export-cmd "$@"