Merge pull request #243 from legoscia/no-default-sys-config

Rename sys.config to sys.config.orig

.gitignore

@@ -1,4 +1,6 @@
 /rel/linc/
+# sys.config.orig is version controlled; sys.config is installation specific.
+/rel/files/sys.config
 /apps/*/ebin/
 /apps/*/.eunit/
 /apps/*/doc/

rel/rebar.config

@@ -0,0 +1,15 @@
+%% -*- erlang -*-
+{pre_hooks,
+ [{generate,
+   "sh -c 'test -f files/sys.config || (echo "
+   "\"The configuration file rel/files/sys.config does not exist.\n"
+   "You can create it in two ways:\n"
+   "\n"
+   "1. Either run scripts/config_gen with appropriate arguments\n"
+   "   and save its output in rel/files/sys.config,\n"
+   "\n"
+   "2. Or copy rel/files/sys.config.orig to rel/files/sys.config\n"
+   "   and edit it by hand to fit your setup.\n"
+   "\n"
+   "Then run \\\"make rel\\\" again.\n\"; exit 1)'"
+  }]}.