Add support for alternate dependency urls

This change adds the ability to use alternate urls for downloading
dependencies. To make use of alternate urls run:
rebar get-deps alt_urls=true

1 files changed, 16 insertions, 1 deletions

diff --git a/src/rebar_deps.erl b/src/rebar_deps.erl
index 2085cf2..c6e3ff6 100644
--- a/src/rebar_deps.erl
+++ b/src/rebar_deps.erl
@@ -223,15 +223,30 @@ find_deps(Mode, [App | Rest], Acc) when is_atom(App) ->
 find_deps(Mode, [{App, VsnRegex} | Rest], Acc) when is_atom(App) ->
     find_deps(Mode, [{App, VsnRegex, undefined} | Rest], Acc);
 find_deps(Mode, [{App, VsnRegex, Source} | Rest], Acc) ->
+    find_deps(Mode, [{App, VsnRegex, Source, []} | Rest], Acc);
+find_deps(Mode, [{App, VsnRegex, Source, Opts} | Rest], Acc) ->
     Dep = #dep { app = App,
                  vsn_regex = VsnRegex,
-                 source = Source },
+                 source = get_source(Source, Opts) },
     {Availability, FoundDir} = find_dep(Dep),
     find_deps(Mode, Rest, acc_deps(Mode, Availability, Dep, FoundDir, Acc));
 find_deps(_Mode, [Other | _Rest], _Acc) ->
     ?ABORT("Invalid dependency specification ~p in ~s\n",
            [Other, rebar_utils:get_cwd()]).
 
+get_source(undefined, _Opts) ->
+    undefined;
+get_source(Source, Opts) ->
+    setelement(2, Source, dep_url(element(2, Source), Opts)).
+
+dep_url(Url, Opts) ->
+    case rebar_config:get_global(alt_urls, "false") of
+        "true" ->
+            proplists:get_value(alt_url, Opts, Url);
+        "false" ->
+            Url
+    end.
+
 find_dep(Dep) ->
     %% Find a dep based on its source,
     %% e.g. {git, "https://github.com/mochi/mochiweb.git", "HEAD"}