From 5bca70cc2e8e8158fb8283dc58ad1797101fecd4 Mon Sep 17 00:00:00 2001
From: Yu-Jie Lin <livibetter@gmail.com>
Date: Thu, 3 Jul 2014 09:54:52 +0800
Subject: fix #4 requirement of Wheel package, now optional

---
 Makefile |  1 -
 setup.py | 10 +++++++---
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/Makefile b/Makefile
index 1e366a0..ff41868 100644
--- a/Makefile
+++ b/Makefile
@@ -73,7 +73,6 @@ $(VENV_PY2_CMD) $(VENV_PY3_CMD):
 	rm -rf $(INSTALL_TEST_DIR)
 	$@ $(INSTALL_TEST_DIR)
 	./setup.py sdist --dist-dir $(INSTALL_TEST_DIR)
-	$(INSTALL_TEST_DIR)/bin/pip install wheel
 	$(INSTALL_TEST_DIR)/bin/pip install $(INSTALL_TEST_DIR)/*.tar.gz
 	@\
 		CHK_VER="`$(PY2_CMD) $(SCRIPT) --version 2>&1`";\
diff --git a/setup.py b/setup.py
index f623886..3347249 100755
--- a/setup.py
+++ b/setup.py
@@ -1,5 +1,5 @@
 #!/usr/bin/env python
-# Copyright (C) 2013 by Yu-Jie Lin
+# Copyright (C) 2013, 2014 by Yu-Jie Lin
 # For detail license information, See COPYING
 
 from __future__ import print_function
@@ -8,7 +8,10 @@ import sys
 from distutils.core import Command, setup
 from unittest import TestLoader, TextTestRunner
 
-from wheel.bdist_wheel import bdist_wheel
+try:
+    from wheel.bdist_wheel import bdist_wheel
+except ImportError:
+    bdist_wheel = None
 
 try:
     from sphinx.setup_command import BuildDoc
@@ -284,7 +287,6 @@ setup_d = dict(
     name=module_name,
     long_description=long_description,
     cmdclass={
-        'bdist_wheel': bdist_wheel,
         'isort': cmd_isort,
         'pep8': cmd_pep8,
         'pyflakes': cmd_pyflakes,
@@ -297,6 +299,8 @@ setup_d = dict(
     **meta
 )
 
+if bdist_wheel:
+    setup_d['cmdclass']['bdist_wheel'] = bdist_wheel
 if BuildDoc:
     setup_d['cmdclass']['build_sphinx'] = BuildDoc
 if UploadDoc:
-- 
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