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

priv/shell-completion/bash/rebar

@@ -12,7 +12,8 @@ _rebar()
         ct doc delete-deps eunit get-deps generate generate-upgrade \
         help list-deps list-templates update-deps version xref overlay \
         apps= case= force=1 jobs= suites= verbose=1 appid= previous_release= \
-        nodeid= root_dir= skip_deps=true skip_apps= template= template_dir="
+        nodeid= root_dir= skip_deps=true skip_apps= template= template_dir= \
+        alt_urls=true"
 
     if [[ ${cur} == --* ]] ; then
         COMPREPLY=( $(compgen -W "${lopts}" -- ${cur}) )

rebar.config.sample

@@ -113,7 +113,10 @@
 {deps, [application_name,
         {application_name, "1.0.*"},
         {application_name, "1.0.*",
-         {git, "git://github.com/basho/rebar.git", {branch, "master"}}}]}.
+         {git, "git://github.com/basho/rebar.git", {branch, "master"}}},
+        {application_name, "1.0.*",
+         {git, "git://github.com/basho/rebar.git", {branch, "master"}},
+         [{alt_url, "https://github.com/basho/rebar.git"}]}]}.
 
 %% == Subdirectories ==
 

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"}