Load plugins dynamically from source

This patch updates rebar_core to look for missing plugins (i.e. those
that aren't found on the code path at runtime) in a configurable
plugin directory, and dynamically compile and load them at runtime.

By default, the directory "plugins" is searched, although this can be
overriden by setting the plugin_dir in your rebar.config.

1 files changed, 8 insertions, 0 deletions

diff --git a/inttest/tplugins/test_plugin.erl b/inttest/tplugins/test_plugin.erl
new file mode 100644
index 0000000..461247c
--- /dev/null
+++ b/inttest/tplugins/test_plugin.erl
@@ -0,0 +1,8 @@
+-module(test_plugin).
+-compile(export_all).
+
+fwibble(Config, _) ->
+    Pwd = rebar_utils:get_cwd(),
+    Ok = filelib:is_regular(filename:join(Pwd, "fwibble.test")),
+    rebar_log:log(info, "~p:~p in ~s :: ~p~n", [test_plugin, clean, Pwd, Ok]),
+    ok = file:delete("fwibble.test").