Added support for proxy on rebar3 based on environment variables.

bootstrap

@@ -123,8 +123,6 @@ setHttpcOptions() ->
             Opts2 = Opts1
     end,
 
-    io:format("Opts: ~p~n", [Opts2]),
-
     case Opts2 of
         [] ->
             ok;

src/rebar3.erl

@@ -273,13 +273,5 @@ start_and_load_apps() ->
     application:start(public_key),
     application:start(ssl),
     inets:start(),
-    inets:start(httpc, [{profile, hex}]),
-    http_opts().
-
-http_opts() ->
-    Opts = [{max_sessions, 4},
-            {max_keep_alive_length, 4},
-            {keep_alive_timeout, 120000},
-            {max_pipeline_length, 4},
-            {pipeline_timeout, 60000}],
-    httpc:set_options(Opts, hex).
+    inets:start(httpc),
+    rebar_utils:set_httpc_options().

src/rebar_utils.erl

@@ -56,7 +56,8 @@
          wordsize/0,
          tup_umerge/2,
          tup_sort/1,
-         line_count/1]).
+         line_count/1,
+         set_httpc_options/0]).
 
 %% for internal use only
 -export([otp_release/0]).
@@ -661,3 +662,54 @@ maybe_ends_in_comma(H) ->
         "," ++ Flag -> lists:reverse(Flag);
         _           -> false
     end.
+
+set_httpc_options() ->
+    %% Get http_proxy and https_proxy environment variables
+    case os:getenv("http_proxy") of
+        false ->
+            Http = "";
+        Http ->
+            Http
+    end,
+    case os:getenv("https_proxy") of
+        false ->
+            Https = "";
+        Https ->
+            Https
+    end,
+
+    %% Parse the variables to extract host and port
+    Opts = [],
+    case http_uri:parse(Http) of
+        {ok,{_, [], Host, Port, _, []}} ->
+            Opts1 = Opts ++ [{proxy, {{Host, Port}, []}}];
+        {error, _} ->
+            Opts1 = Opts
+    end,
+
+    case http_uri:parse(Https) of
+        {ok,{_, [], Host2, Port2, _, []}} ->
+            Opts2 = Opts1 ++ [{https_proxy, {{Host2, Port2}, []}}];
+        {error, _} ->
+            Opts2 = Opts1
+    end,
+
+    case Opts2 of
+        [] ->
+            Opts3 = [
+                {max_sessions, 4},
+                {max_keep_alive_length, 4},
+                {keep_alive_timeout, 120000},
+                {max_pipeline_length, 4},
+                {pipeline_timeout, 60000}
+            ];
+        _ ->
+            Opts3 = Opts2 ++ [
+                {max_sessions, 4},
+                {max_keep_alive_length, 4},
+                {keep_alive_timeout, 120000},
+                {max_pipeline_length, 4},
+                {pipeline_timeout, 60000}
+            ]
+    end,
+    httpc:set_options(Opts3).