1 files changed, 44 insertions, 0 deletions
diff --git a/rel/files/install_upgrade.escript b/rel/files/install_upgrade.escript
new file mode 100644
index 000000000..56cea1963
--- /dev/null
+++ b/rel/files/install_upgrade.escript
@@ -0,0 +1,44 @@
+#!/usr/bin/env escript
+%%! -noshell -noinput
+%% -*- mode: erlang;erlang-indent-level: 4;indent-tabs-mode: nil -*-
+%% ex: ft=erlang ts=4 sw=4 et
+
+-define(TIMEOUT, 60000).
+-define(INFO(Fmt,Args), io:format(Fmt,Args)).
+
+main([NodeName, Cookie, ReleasePackage]) ->
+    TargetNode = start_distribution(NodeName, Cookie),
+    {ok, Vsn} = rpc:call(TargetNode, release_handler, unpack_release,
+                         [ReleasePackage], ?TIMEOUT),
+    ?INFO("Unpacked Release ~p~n", [Vsn]),
+    {ok, OtherVsn, Desc} = rpc:call(TargetNode, release_handler,
+                                    check_install_release, [Vsn], ?TIMEOUT),
+    {ok, OtherVsn, Desc} = rpc:call(TargetNode, release_handler,
+                                    install_release, [Vsn], ?TIMEOUT),
+    ?INFO("Installed Release ~p~n", [Vsn]),
+    ok = rpc:call(TargetNode, release_handler, make_permanent, [Vsn], ?TIMEOUT),
+    ?INFO("Made Release ~p Permanent~n", [Vsn]);
+main(_) ->
+    init:stop(1).
+
+start_distribution(NodeName, Cookie) ->
+    MyNode = make_script_node(NodeName),
+    {ok, _Pid} = net_kernel:start([MyNode, shortnames]),
+    erlang:set_cookie(node(), list_to_atom(Cookie)),
+    TargetNode = make_target_node(NodeName),
+    case {net_kernel:hidden_connect_node(TargetNode),
+          net_adm:ping(TargetNode)} of
+        {true, pong} ->
+            ok;
+        {_, pang} ->
+            io:format("Node ~p not responding to pings.\n", [TargetNode]),
+            init:stop(1)
+    end,
+    TargetNode.
+
+make_target_node(Node) ->
+    [_, Host] = string:tokens(atom_to_list(node()), "@"),
+    list_to_atom(lists:concat([Node, "@", Host])).
+
+make_script_node(Node) ->
+    list_to_atom(lists:concat([Node, "_upgrader_", os:getpid()])).