From 902e00fb93991b612ba7ed40afbc4c0abcf37dfc Mon Sep 17 00:00:00 2001
From: Dave Smith <dizzyd@dizzyd.com>
Date: Mon, 3 May 2010 19:47:07 -0600
Subject: [PATCH] Add support for requiring a specific ERTS or OTP version via
 a regex

---
 ebin/rebar.app            |  2 ++
 src/rebar_require_vsn.erl | 68 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 70 insertions(+)
 create mode 100644 src/rebar_require_vsn.erl

diff --git a/ebin/rebar.app b/ebin/rebar.app
index 0019509..e04970a 100644
--- a/ebin/rebar.app
+++ b/ebin/rebar.app
@@ -24,6 +24,7 @@
               rebar_port_compiler,
               rebar_rel_utils,
               rebar_reltool,
+              rebar_require_vsn,
               rebar_subdirs,
               rebar_templater,
               rebar_utils,
@@ -43,6 +44,7 @@
 
          %% any_dir processing modules
          {any_dir_modules, [
+                            rebar_require_vsn,
                             rebar_subdirs,
                             rebar_deps,
                             rebar_templater,
diff --git a/src/rebar_require_vsn.erl b/src/rebar_require_vsn.erl
new file mode 100644
index 0000000..96fc088
--- /dev/null
+++ b/src/rebar_require_vsn.erl
@@ -0,0 +1,68 @@
+%% -*- tab-width: 4;erlang-indent-level: 4;indent-tabs-mode: nil -*-
+%% ex: ts=4 sw=4 et
+%% -------------------------------------------------------------------
+%%
+%% rebar: Erlang Build Tools
+%%
+%% Copyright (c) 2009 Dave Smith (dizzyd@dizzyd.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(rebar_require_vsn).
+
+-include("rebar.hrl").
+
+-export([compile/2,
+         eunit/2]).
+
+%% ===================================================================
+%% Public API
+%% ===================================================================
+
+compile(Config, _) ->
+    check_versions(Config).
+
+eunit(Config, _) ->
+    check_versions(Config).
+
+check_versions(Config) ->
+    ErtsRegex = rebar_config:get(Config, require_erts_vsn, ".*"),
+    case re:run(erlang:system_info(version), ErtsRegex, [{capture, none}]) of
+        match ->
+            ?DEBUG("Matched required ERTS version: ~s -> ~s\n",
+                   [erlang:system_info(version), ErtsRegex]);
+        nomatch ->
+            ?ABORT("ERTS version ~s does not match required regex ~s\n",
+                   [erlang:system_info(version), ErtsRegex])
+    end,
+
+    OtpRegex = rebar_config:get(Config, require_otp_vsn, ".*"),
+    case re:run(erlang:system_info(otp_release), OtpRegex, [{capture, none}]) of
+        match ->
+            ?DEBUG("Matched required OTP release: ~s -> ~s\n",
+                   [erlang:system_info(otp_release), OtpRegex]);
+        nomatch ->
+            ?ABORT("OTP release ~s does not match required regex ~s\n",
+                   [erlang:system_info(otp_release), OtpRegex])
+    end.
+
+
+