From 908b442c7b5e74c9d557a1468b321ef4255e402e Mon Sep 17 00:00:00 2001
From: Tobias Markmann <tm@ayena.de>
Date: Sun, 12 Apr 2015 19:47:06 +0200
Subject: Improve python flexibility for SCons build system

This adds support for running ./scons out of the box on Arch Linux.

Test-Information:

Tested on OS X 10.9.5 and Manjaro Linux (Arch-based).

Change-Id: I53c4d537571a40352797c9176582b6fd93a75227

diff --git a/scons b/scons
index 938c2d1..32bdf6c 100755
--- a/scons
+++ b/scons
@@ -1,3 +1,23 @@
-#!/bin/sh
+#!/usr/bin/env bash
 
-`dirname $0`/3rdParty/SCons/scons.py $@
+# This script checks various names for the Python interpreter for their existance and version. 
+# The latest valid version is used to run the SCons build tool, which requires python2.
+# This is needed because some distributions ship Pyhton3 and others Python2 their 'python'. 
+
+function is_supported_python
+{
+	local exe=$1
+	$exe -c 'import sys; (major, minor, a, b, c) = sys.version_info; python_version = (major, minor); exit(not ((2, 4) <= python_version <= (2, 7)))' 2>/dev/null
+}
+
+declare -a supported_python_versions=(python python2.7 python2.6 python2.5 python2.4)
+
+for exe in ${supported_python_versions[*]}; do
+	if is_supported_python "$exe"; then
+		exec $exe `dirname $0`/3rdParty/SCons/scons.py "$@"
+		exit
+	fi
+done
+
+echo "No suitable Python interpreter found! Swift build system supports Python 2.4 to Python 2.7.!!!" >&2
+exit 1
\ No newline at end of file
-- 
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