Add possibility to make symbolic links

Simple feature, useful to make link to something without copying it.

src/rebar_templater.erl

@@ -380,6 +380,16 @@ execute_template([{chmod, Mod, File} | Rest], TemplateType, TemplateName,
             ?ABORT("Failed while processing template instruction "
                    "{cmod, ~b, ~s}: ~p~n", [Mod, File, Reason])
     end;
+execute_template([{symlink, Target, LinkName} | Rest], TemplateType, TemplateName,
+                 Context, Force, ExistingFiles) ->
+    case file:make_symlink(Target, LinkName) of
+        ok ->
+            execute_template(Rest, TemplateType, TemplateName,
+                             Context, Force, ExistingFiles);
+        {error, Reason} ->
+            ?ABORT("Failed while processing template instruction "
+                   "{symlink, ~s, ~s}: ~p~n", [Target, LinkName, Reason])
+    end;
 execute_template([{variables, _} | Rest], TemplateType, TemplateName, Context,
                  Force, ExistingFiles) ->
     execute_template(Rest, TemplateType, TemplateName,