Replace inttest external dep to protobuffs with a mock

In inttest/proto_protobuffs, replace the external dependency to
erlang_protobuffs, a protocol buffer compiler, with a simple mock.

The mock provides enough of what is needed for inttest only,
which is to generate some dummy content, but with proper file names.

inttest/proto_protobuffs/mock/protobuffs/src/protobuffs.app.src

@@ -0,0 +1,10 @@
+%% -*- erlang-indent-level: 4;indent-tabs-mode: nil -*-
+%% ex: ts=4 sw=4 et
+
+{application, protobuffs,
+ [{description,
+   "Simple mock of erlang_protobuffs, with enough to generate dummy files"},
+  {vsn, "1"},
+  {registered, []},
+  {applications, [kernel, stdlib]},
+  {env, []}]}.

inttest/proto_protobuffs/mock/protobuffs/src/protobuffs.erl

@@ -0,0 +1,4 @@
+%% -*- erlang-indent-level: 4;indent-tabs-mode: nil -*-
+%% ex: ts=4 sw=4 et
+
+-module(protobuffs).

inttest/proto_protobuffs/mock/protobuffs/src/protobuffs_compile.erl

@@ -0,0 +1,68 @@
+%% -*- erlang-indent-level: 4;indent-tabs-mode: nil -*-
+%% ex: ts=4 sw=4 et
+%% -------------------------------------------------------------------
+%%
+%% rebar: Erlang Build Tools
+%%
+%% Copyright (c) 2015 Tomas Abrahamsson (tomas.abrahamsson@gmail.com)
+%%
+%% Permission is hereby granted, free of charge, to any person obtaining a copy
+%% of this software and associated documentation files (the "Software"), to deal
+%% in the Software without restriction, including without limitation the rights
+%% to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+%% copies of the Software, and to permit persons to whom the Software is
+%% furnished to do so, subject to the following conditions:
+%%
+%% The above copyright notice and this permission notice shall be included in
+%% all copies or substantial portions of the Software.
+%%
+%% THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+%% IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+%% FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+%% AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+%% LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+%% OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+%% THE SOFTWARE.
+%% -------------------------------------------------------------------
+-module(protobuffs_compile).
+-export([scan_file/2]).
+
+%% Simulate protobuffs compiling some proto files,
+%% but generate only enough of what's needed for testing -- dummy stuff only.
+scan_file(Proto, _Opts) ->
+    ProtoBase = filename:basename(Proto, ".proto"),
+    ModBase  = ProtoBase ++ "_pb",
+    BeamDest = filename:join(get_beam_outdir(), ModBase ++ ".beam"),
+    HrlDest  = filename:join(get_hrl_outdir(), ModBase ++ ".hrl"),
+    ok = file:write_file(BeamDest, beam_text(ModBase)),
+    ok = file:write_file(HrlDest, hrl_text(ModBase)).
+
+beam_text(ModBase) ->
+    Mod = list_to_atom(ModBase),
+    Forms = [mk_attr(module, Mod)], % just a -module(...). line
+    {ok, Mod, Bin} = compile:forms(Forms),
+    Bin.
+
+mk_attr(AttrName, AttrValue) ->
+    erl_syntax:revert(
+      erl_syntax:attribute(erl_syntax:atom(AttrName),
+                           [erl_syntax:abstract(AttrValue)])).
+
+hrl_text(ModBase) ->
+    io_lib:format(
+      lines(["-ifndef(~s_hrl).",
+             "-define(~s_hrl, true).",
+             "",
+             "%% some record definitions would normally go here...",
+             ""
+             "-endif. %% ~s_hrl"]),
+      [ModBase, ModBase, ModBase]).
+
+get_beam_outdir() ->
+    ".".
+
+get_hrl_outdir() ->
+    ".".
+
+lines(Lines) ->
+    lists:flatten([[L, $\n] || L <- Lines]).

inttest/proto_protobuffs/rebar.config

@@ -3,14 +3,12 @@
 
 {erl_opts,
  [
-  {i, "deps/protobuffs/include"},
   {platform_define, "R13|R14", 'NO_CALLBACK_ATTRIBUTE'}
  ]}.
 
 {deps,
  [
-  {protobuffs, [], {git, "git://github.com/basho/erlang_protobuffs",
-                   {branch, "master"}}}
+  {protobuffs, [], {rsync, "../../../inttest/proto_protobuffs/mock/protobuffs"}}
  ]}.
 
 %% The default proto compiler is protobuffs